This document discusses the health effects of nuclear power incidents, where physics, chemistry, and biology combine to drive outcomes. It summarizes the Chernobyl and Fukushima disasters, comparing radiation doses, health impacts, and lessons learned. The key points are:
1) Chernobyl resulted in 28 immediate deaths from acute radiation syndrome while long-term 15 deaths were from thyroid cancer in children exposed to radioactive iodine fallout.
2) Fukushima saw no radiation deaths though the evacuation caused over 700 non-radiation deaths. Thyroid doses were much lower than Chernobyl so increased cancer is unlikely.
3) Both incidents showed that promptly evacuating populations and administering stable
This document provides an overview of radiation hazards and protection. It discusses the different types of radiation including ionizing and non-ionizing radiation. It describes sources of medical radiation exposure like radiography, nuclear imaging, and radiation therapy. The key biological effects of radiation are ionization of atoms which can damage molecules, cells, tissues and organs. The major target of radiation is DNA. Radiation can cause DNA damage, mutations, and altered cell responses. Deterministic effects are harmful tissue reactions that become more serious with increasing dose above a threshold, while stochastic effects like cancer and genetic effects occur probabilistically with no safe threshold. Radiation sensitivity varies between tissues, with rapidly-dividing cells being more sensitive. Proper radiation protection
Doses and Risks in Diagnostic Radiology, Interventional Radiology and Cardiol...DrAyush Garg
This document reviews doses and risks from natural background radiation as well as medical sources of radiation including diagnostic radiology, interventional radiology/cardiology, and nuclear medicine. It provides details on dose levels from various natural sources and medical procedures. The highest medical doses come from interventional fluoroscopy which can exceed skin dose limits and increase risks. Nuclear medicine procedures generally have lower doses than interventional methods but higher than diagnostic radiology. Risks to both patients and medical staff are discussed.
The document discusses the health effects of radiation exposure. It provides an overview of radiation sources and the types of radiation. Ionizing radiation can damage DNA and lead to cancer or other health issues. The risk of cancer increases with higher radiation exposure but some risk exists even at low doses according to linear no-threshold models. Medical imaging is a major source of radiation exposure from diagnostic tests like CT scans.
There are many health risks associated with exposure to radiation from nuclear energy. Short term effects include radiation sickness, while long term effects include increased cancer risks. Children are especially vulnerable, as exposure can lead to thyroid cancer and emotional problems. The Chernobyl disaster caused high rates of thyroid cancer in Ukrainian children decades later. Nuclear accidents can contaminate food and water with radioactive isotopes like iodine-131, posing internal exposure risks.
This document discusses radioactive pollution, its causes, effects, and control measures. The main causes of radioactive pollution are nuclear accidents at power plants, nuclear weapons testing and use, mining and processing of radioactive materials, and accidents involving radioactive waste. The effects include genetic mutations and diseases like cancer, soil and water contamination, and damage to plants and wildlife. Control measures include proper disposal, storage, and labeling of radioactive waste, banning nuclear tests, developing alternative energy sources, and taking personal precautions by those living near nuclear sites.
Radiologic imaging during pregnancy has increased over the last 10 years. The document discusses the risks of radiation exposure to fetuses from various medical imaging procedures. It finds that deterministic effects require a threshold dose above 10 rads but stochastic effects have no threshold. Common procedures like x-rays present minimal risk while CT scans can double cancer risk for doses over 2-5 rads. MRI is not associated with radiation but may present other hazards. Contrast agents can affect the fetal thyroid so should only be used if essential. The risks and benefits of any imaging during pregnancy must be carefully considered.
Cesium is a naturally occurring element found in low amounts in rocks, soil, and dust. Exposure to stable or radioactive cesium can occur through ingesting contaminated food or water or breathing contaminated air. High levels of radioactive cesium exposure can cause nausea, vomiting, diarrhea, bleeding, coma or even death. The document provides information on the health effects of cesium exposure, how people can be exposed, recommendations for reducing risk, and testing for cesium exposure.
This document provides an overview of radiation hazards and protection. It discusses the different types of radiation including ionizing and non-ionizing radiation. It describes sources of medical radiation exposure like radiography, nuclear imaging, and radiation therapy. The key biological effects of radiation are ionization of atoms which can damage molecules, cells, tissues and organs. The major target of radiation is DNA. Radiation can cause DNA damage, mutations, and altered cell responses. Deterministic effects are harmful tissue reactions that become more serious with increasing dose above a threshold, while stochastic effects like cancer and genetic effects occur probabilistically with no safe threshold. Radiation sensitivity varies between tissues, with rapidly-dividing cells being more sensitive. Proper radiation protection
Doses and Risks in Diagnostic Radiology, Interventional Radiology and Cardiol...DrAyush Garg
This document reviews doses and risks from natural background radiation as well as medical sources of radiation including diagnostic radiology, interventional radiology/cardiology, and nuclear medicine. It provides details on dose levels from various natural sources and medical procedures. The highest medical doses come from interventional fluoroscopy which can exceed skin dose limits and increase risks. Nuclear medicine procedures generally have lower doses than interventional methods but higher than diagnostic radiology. Risks to both patients and medical staff are discussed.
The document discusses the health effects of radiation exposure. It provides an overview of radiation sources and the types of radiation. Ionizing radiation can damage DNA and lead to cancer or other health issues. The risk of cancer increases with higher radiation exposure but some risk exists even at low doses according to linear no-threshold models. Medical imaging is a major source of radiation exposure from diagnostic tests like CT scans.
There are many health risks associated with exposure to radiation from nuclear energy. Short term effects include radiation sickness, while long term effects include increased cancer risks. Children are especially vulnerable, as exposure can lead to thyroid cancer and emotional problems. The Chernobyl disaster caused high rates of thyroid cancer in Ukrainian children decades later. Nuclear accidents can contaminate food and water with radioactive isotopes like iodine-131, posing internal exposure risks.
This document discusses radioactive pollution, its causes, effects, and control measures. The main causes of radioactive pollution are nuclear accidents at power plants, nuclear weapons testing and use, mining and processing of radioactive materials, and accidents involving radioactive waste. The effects include genetic mutations and diseases like cancer, soil and water contamination, and damage to plants and wildlife. Control measures include proper disposal, storage, and labeling of radioactive waste, banning nuclear tests, developing alternative energy sources, and taking personal precautions by those living near nuclear sites.
Radiologic imaging during pregnancy has increased over the last 10 years. The document discusses the risks of radiation exposure to fetuses from various medical imaging procedures. It finds that deterministic effects require a threshold dose above 10 rads but stochastic effects have no threshold. Common procedures like x-rays present minimal risk while CT scans can double cancer risk for doses over 2-5 rads. MRI is not associated with radiation but may present other hazards. Contrast agents can affect the fetal thyroid so should only be used if essential. The risks and benefits of any imaging during pregnancy must be carefully considered.
Cesium is a naturally occurring element found in low amounts in rocks, soil, and dust. Exposure to stable or radioactive cesium can occur through ingesting contaminated food or water or breathing contaminated air. High levels of radioactive cesium exposure can cause nausea, vomiting, diarrhea, bleeding, coma or even death. The document provides information on the health effects of cesium exposure, how people can be exposed, recommendations for reducing risk, and testing for cesium exposure.
Nuclear pollution occurs when radioactive materials are accidentally released into the environment. Radioactive materials emit ionizing radiation that can damage living things. Common causes of nuclear pollution include nuclear power plant accidents, nuclear weapons use, mining and processing of radioactive materials, and improper storage and disposal of nuclear waste. Effects of radiation exposure include genetic mutations, increased cancer rates, soil infertility, and damage to plants and wildlife. Solutions to prevent further nuclear pollution involve proper storage and disposal of nuclear waste, banning nuclear weapons tests, developing alternative energy sources, and taking safety precautions when handling radioactive materials.
The Indian Dental Academy is the Leader in continuing dental education , training dentists in all aspects of dentistry and
offering a wide range of dental certified courses in different formats.
1) Radiation is naturally present and comes from space, ground, and within our bodies. Biological effects depend on factors like radiation type, dose, and exposed tissues.
2) Acute radiation exposure can cause acute radiation syndrome with prodromal, latent, and manifest illness stages depending on dose. Bone marrow, gastrointestinal, and cardiovascular syndromes can occur.
3) Radiation damages DNA directly or indirectly through water radiolysis. Cells may be delayed, die, mutate, or develop genomic instability and cancer. Bystander effects can also occur.
Climate change is increasing the frequency and intensity of hydrologic extremes like heavy precipitation and drought. While global trends indicate precipitation will increase 1-3% per degree Celsius and extreme storms 6-10% per degree, significant regional variability exists. Ensemble weather forecasts can help mitigate impacts by informing decisions for applications like meningitis outbreak prediction in Africa and flood forecasting in Bangladesh. However, natural variability and uncertainty in climate models and scenarios mean impacts must be assessed carefully at local and regional scales using multiple models and simulations.
BIOLOGICAL EFFECTS OF RADIATION & RADIATION PROTECTION.pptxvimala999546
The document discusses the biological effects of radiation and principles of radiation protection. It describes how radiation can cause structural changes in DNA through processes like hydrogen bond breaking, molecular breakage, and cross-linking. The harmful effects are categorized as deterministic, which increase in severity with dose, and stochastic, where probability but not severity increases with dose. Examples of acute radiation syndrome are provided. Radiation risk includes somatic, genetic and fetal risk. Radiation protection aims to prevent deterministic effects and limit stochastic effects through justification of practices, optimization of protection and setting dose limits. Methods to minimize exposure include reducing time spent in radiation fields, increasing distance from sources, and using shielding materials.
This document summarizes radioactive pollution and its effects. It defines radioactive pollution as the addition of radiation to the environment through radioactive elements. It describes the types of radiation as ionizing and non-ionizing. Ionizing radiation like gamma rays have enough energy to ionize atoms, while non-ionizing radiation only excites atoms. Sources of radioactive pollution include natural sources like radioactive minerals and human sources like nuclear reactors and medical applications. Effects on humans can range from mild irritation to cancer, depending on exposure level and duration. Prevention methods include limiting nuclear activities, proper disposal of waste, and minimizing radiation doses during medical procedures.
The Topic is Radioprotective Efficacy of RK-IP-006 in mammalian system. Experiments performed were Antioxidant assay, SDS-PAGE, Western Blot to check the effect against radiation of 9Gy.
This document discusses radioactive contamination from various sources such as nuclear weapons testing, nuclear reactors, and medical applications. It describes different types of radiation and contamination, including internal and external contamination. Effects of contamination are outlined for humans, plants, animals, and the environment. Various methods for measuring and controlling contamination in air, water, soil, and living things are also summarized.
Radiation Introduction, Hazards and Measuring Equipment used in Radiation Pro...Sabir Rasheed
Introduction of radiation, hazards and Measuring Equipment used in Radiation Protection.
Biology Effects.
Nuclear effects.
Different Radiation Measuring instruments.
1.Types of personnel monitoring devices
2.Instruments for measuring external Exposure.
Natural sources of radiation include cosmic radiation from space and terrestrial radiation from radionuclides in the earth's crust. The largest contribution to natural radiation exposure is from radon gas. Man-made sources include medical procedures like x-rays, fallout from nuclear weapons testing, occupational exposure in nuclear power facilities, and materials like tobacco that concentrate radionuclides. Standards for radiation protection are set by organizations like the ICRP to justify practices that incur exposure and keep doses as low as reasonably achievable, with limits on the maximum permissible dose to individuals.
Nuclear pollution occurs when radioactive material is released into the environment through various human activities like nuclear power generation, weapons production, mining, and medical use. It can cause health issues ranging from mild skin irritation to cancer and death from exposure. The main sources of nuclear pollution are nuclear power plants, mining and milling of uranium ores, waste from nuclear weapons, and disposal of radioactive materials from medical and research facilities. Safety measures need to be strengthened to prevent nuclear pollution and reduce associated health risks. Moving away from nuclear power and toward more sustainable and renewable energy sources can also help address this issue over the long term.
This document provides an overview of radioactive pollution including:
- Definitions of radioactive contamination and ionizing radiation.
- Natural sources include radioactive minerals, cosmic rays, and naturally occurring radioisotopes. Anthropogenic sources are nuclear tests, reactors, medical applications, and waste.
- Effects on humans can range from mild irritation to cancer, depending on exposure level and duration. Rapidly dividing cells are most at risk.
- Prevention methods include limiting nuclear activities, careful disposal, and using shielding and ventilation in high exposure areas. The document concludes by calling for reduced nuclear power usage going forward.
Radioactive pollution occurs when radioactive material is released into the environment through human activities such as nuclear power generation, nuclear weapons production and testing, mining, and medical procedures. It can cause health risks like burns, cancer, and death from exposure to radiation. Sources of radioactive pollution include nuclear power plants, mining and processing of radioactive ores, production and testing of nuclear weapons, medical and industrial uses of radioactive materials, fallout from atmospheric nuclear weapons testing, and accidents involving nuclear equipment. Safety measures need to be enforced to minimize radioactive pollution and reduce health risks.
Medical response to a major radiologic emergency - handoutFarooq Khan
1. The document outlines planning considerations and medical management strategies for major radiological emergencies involving radiation exposure devices, nuclear weapons detonation, nuclear reactor meltdowns, or dirty bombs.
2. It describes the health effects of radiation exposure which depend on dose, part of body exposed, rate and type of radiation. Acute effects include radiation sickness while long term risks include cancer induction.
3. The document provides guidance on assessing and treating external contamination, internal contamination, and radiation injury. Key principles include decontamination and urgent stabilization of life-threatening trauma while closely monitoring for delayed radiation effects.
1. The document discusses various types of pollution caused by human activities and their impacts. It defines pollution and describes different forms such as air pollution, light pollution, and point source versus non-point source pollution.
2. DDT is used as a case study to illustrate the conflicts between the utility of a substance and its environmental impacts. While DDT was widely used for malaria control, it bioaccumulated in ecosystems and contributed to thinning eggshells and declines in bird populations like bald eagles.
3. The costs of pollution are extensive and include impacts on human health, natural systems, and economic losses. Air pollution alone results in over $200 billion in lost income annually due to premature deaths.
The document discusses radiation injuries from ionizing radiation. It describes the types of radiation exposure including internal and external contamination. It outlines the signs and symptoms of acute radiation syndrome at different radiation doses and its pathophysiology which can cause hematopoietic, gastrointestinal, cardiovascular and neurological effects. Treatment involves decontamination and managing symptoms based on estimated radiation exposure.
This document provides an overview of radiation biology. It discusses radiation measurements, injury mechanisms, and various effects of radiation exposure. Regarding measurements, it defines units like the gray (Gy), sievert (Sv), and becquerel (Bq). It describes radiation injury occurring via ionization and free radical formation. Effects are categorized as stochastic, deterministic, acute, chronic, somatic, and genetic. Sensitive tissues include skin, bone marrow, and developing fetuses. Factors influencing biological effects include the irradiated tissue type, area, and dose rate.
The document discusses nuclear hazards and radiation. It defines nuclear reactions like fusion and fission, and notes they can release energy. The main sources of nuclear radiation are natural sources like radon, and anthropogenic sources like nuclear power plants and accidents. Exposure to radiation above certain levels can cause health effects ranging from mild sickness to death. The Chernobyl disaster of 1986 in Ukraine resulted from a power surge and explosions, releasing radiation over Europe. It required large evacuations and has been linked to increased cancer rates. Shielding, distance and limiting exposure time can help control radioactive pollution risks.
This document provides information about nuclear pollution from an environmental studies project. It discusses the causes of nuclear pollution including nuclear weapons testing, nuclear power plants, and improper disposal of spent nuclear fuel. Two major nuclear accidents are summarized: the 1986 Chernobyl disaster, where a nuclear reactor exploded in Ukraine, and the 2011 Fukushima Daiichi nuclear disaster in Japan caused by an earthquake and tsunami. The effects of nuclear pollution on health and the environment are outlined. Suggested preventative measures include proper disposal of nuclear waste and ensuring safety at nuclear power plants.
This document summarizes the radiological implications of the Fukushima Nuclear Power Plant accident on human health. It discusses the acute and long-term health effects of radiation exposure, noting increased cancer risk. The main radionuclides of concern, iodine-131 and cesium-137, can contaminate food and water if ingested. Public health actions recommended include evacuation, sheltering, distributing iodine pills, and restricting locally produced foods and milk. Ongoing radiation monitoring is being conducted in the area.
Nuclear pollution occurs when radioactive materials are accidentally released into the environment. Radioactive materials emit ionizing radiation that can damage living things. Common causes of nuclear pollution include nuclear power plant accidents, nuclear weapons use, mining and processing of radioactive materials, and improper storage and disposal of nuclear waste. Effects of radiation exposure include genetic mutations, increased cancer rates, soil infertility, and damage to plants and wildlife. Solutions to prevent further nuclear pollution involve proper storage and disposal of nuclear waste, banning nuclear weapons tests, developing alternative energy sources, and taking safety precautions when handling radioactive materials.
The Indian Dental Academy is the Leader in continuing dental education , training dentists in all aspects of dentistry and
offering a wide range of dental certified courses in different formats.
1) Radiation is naturally present and comes from space, ground, and within our bodies. Biological effects depend on factors like radiation type, dose, and exposed tissues.
2) Acute radiation exposure can cause acute radiation syndrome with prodromal, latent, and manifest illness stages depending on dose. Bone marrow, gastrointestinal, and cardiovascular syndromes can occur.
3) Radiation damages DNA directly or indirectly through water radiolysis. Cells may be delayed, die, mutate, or develop genomic instability and cancer. Bystander effects can also occur.
Climate change is increasing the frequency and intensity of hydrologic extremes like heavy precipitation and drought. While global trends indicate precipitation will increase 1-3% per degree Celsius and extreme storms 6-10% per degree, significant regional variability exists. Ensemble weather forecasts can help mitigate impacts by informing decisions for applications like meningitis outbreak prediction in Africa and flood forecasting in Bangladesh. However, natural variability and uncertainty in climate models and scenarios mean impacts must be assessed carefully at local and regional scales using multiple models and simulations.
BIOLOGICAL EFFECTS OF RADIATION & RADIATION PROTECTION.pptxvimala999546
The document discusses the biological effects of radiation and principles of radiation protection. It describes how radiation can cause structural changes in DNA through processes like hydrogen bond breaking, molecular breakage, and cross-linking. The harmful effects are categorized as deterministic, which increase in severity with dose, and stochastic, where probability but not severity increases with dose. Examples of acute radiation syndrome are provided. Radiation risk includes somatic, genetic and fetal risk. Radiation protection aims to prevent deterministic effects and limit stochastic effects through justification of practices, optimization of protection and setting dose limits. Methods to minimize exposure include reducing time spent in radiation fields, increasing distance from sources, and using shielding materials.
This document summarizes radioactive pollution and its effects. It defines radioactive pollution as the addition of radiation to the environment through radioactive elements. It describes the types of radiation as ionizing and non-ionizing. Ionizing radiation like gamma rays have enough energy to ionize atoms, while non-ionizing radiation only excites atoms. Sources of radioactive pollution include natural sources like radioactive minerals and human sources like nuclear reactors and medical applications. Effects on humans can range from mild irritation to cancer, depending on exposure level and duration. Prevention methods include limiting nuclear activities, proper disposal of waste, and minimizing radiation doses during medical procedures.
The Topic is Radioprotective Efficacy of RK-IP-006 in mammalian system. Experiments performed were Antioxidant assay, SDS-PAGE, Western Blot to check the effect against radiation of 9Gy.
This document discusses radioactive contamination from various sources such as nuclear weapons testing, nuclear reactors, and medical applications. It describes different types of radiation and contamination, including internal and external contamination. Effects of contamination are outlined for humans, plants, animals, and the environment. Various methods for measuring and controlling contamination in air, water, soil, and living things are also summarized.
Radiation Introduction, Hazards and Measuring Equipment used in Radiation Pro...Sabir Rasheed
Introduction of radiation, hazards and Measuring Equipment used in Radiation Protection.
Biology Effects.
Nuclear effects.
Different Radiation Measuring instruments.
1.Types of personnel monitoring devices
2.Instruments for measuring external Exposure.
Natural sources of radiation include cosmic radiation from space and terrestrial radiation from radionuclides in the earth's crust. The largest contribution to natural radiation exposure is from radon gas. Man-made sources include medical procedures like x-rays, fallout from nuclear weapons testing, occupational exposure in nuclear power facilities, and materials like tobacco that concentrate radionuclides. Standards for radiation protection are set by organizations like the ICRP to justify practices that incur exposure and keep doses as low as reasonably achievable, with limits on the maximum permissible dose to individuals.
Nuclear pollution occurs when radioactive material is released into the environment through various human activities like nuclear power generation, weapons production, mining, and medical use. It can cause health issues ranging from mild skin irritation to cancer and death from exposure. The main sources of nuclear pollution are nuclear power plants, mining and milling of uranium ores, waste from nuclear weapons, and disposal of radioactive materials from medical and research facilities. Safety measures need to be strengthened to prevent nuclear pollution and reduce associated health risks. Moving away from nuclear power and toward more sustainable and renewable energy sources can also help address this issue over the long term.
This document provides an overview of radioactive pollution including:
- Definitions of radioactive contamination and ionizing radiation.
- Natural sources include radioactive minerals, cosmic rays, and naturally occurring radioisotopes. Anthropogenic sources are nuclear tests, reactors, medical applications, and waste.
- Effects on humans can range from mild irritation to cancer, depending on exposure level and duration. Rapidly dividing cells are most at risk.
- Prevention methods include limiting nuclear activities, careful disposal, and using shielding and ventilation in high exposure areas. The document concludes by calling for reduced nuclear power usage going forward.
Radioactive pollution occurs when radioactive material is released into the environment through human activities such as nuclear power generation, nuclear weapons production and testing, mining, and medical procedures. It can cause health risks like burns, cancer, and death from exposure to radiation. Sources of radioactive pollution include nuclear power plants, mining and processing of radioactive ores, production and testing of nuclear weapons, medical and industrial uses of radioactive materials, fallout from atmospheric nuclear weapons testing, and accidents involving nuclear equipment. Safety measures need to be enforced to minimize radioactive pollution and reduce health risks.
Medical response to a major radiologic emergency - handoutFarooq Khan
1. The document outlines planning considerations and medical management strategies for major radiological emergencies involving radiation exposure devices, nuclear weapons detonation, nuclear reactor meltdowns, or dirty bombs.
2. It describes the health effects of radiation exposure which depend on dose, part of body exposed, rate and type of radiation. Acute effects include radiation sickness while long term risks include cancer induction.
3. The document provides guidance on assessing and treating external contamination, internal contamination, and radiation injury. Key principles include decontamination and urgent stabilization of life-threatening trauma while closely monitoring for delayed radiation effects.
1. The document discusses various types of pollution caused by human activities and their impacts. It defines pollution and describes different forms such as air pollution, light pollution, and point source versus non-point source pollution.
2. DDT is used as a case study to illustrate the conflicts between the utility of a substance and its environmental impacts. While DDT was widely used for malaria control, it bioaccumulated in ecosystems and contributed to thinning eggshells and declines in bird populations like bald eagles.
3. The costs of pollution are extensive and include impacts on human health, natural systems, and economic losses. Air pollution alone results in over $200 billion in lost income annually due to premature deaths.
The document discusses radiation injuries from ionizing radiation. It describes the types of radiation exposure including internal and external contamination. It outlines the signs and symptoms of acute radiation syndrome at different radiation doses and its pathophysiology which can cause hematopoietic, gastrointestinal, cardiovascular and neurological effects. Treatment involves decontamination and managing symptoms based on estimated radiation exposure.
This document provides an overview of radiation biology. It discusses radiation measurements, injury mechanisms, and various effects of radiation exposure. Regarding measurements, it defines units like the gray (Gy), sievert (Sv), and becquerel (Bq). It describes radiation injury occurring via ionization and free radical formation. Effects are categorized as stochastic, deterministic, acute, chronic, somatic, and genetic. Sensitive tissues include skin, bone marrow, and developing fetuses. Factors influencing biological effects include the irradiated tissue type, area, and dose rate.
The document discusses nuclear hazards and radiation. It defines nuclear reactions like fusion and fission, and notes they can release energy. The main sources of nuclear radiation are natural sources like radon, and anthropogenic sources like nuclear power plants and accidents. Exposure to radiation above certain levels can cause health effects ranging from mild sickness to death. The Chernobyl disaster of 1986 in Ukraine resulted from a power surge and explosions, releasing radiation over Europe. It required large evacuations and has been linked to increased cancer rates. Shielding, distance and limiting exposure time can help control radioactive pollution risks.
This document provides information about nuclear pollution from an environmental studies project. It discusses the causes of nuclear pollution including nuclear weapons testing, nuclear power plants, and improper disposal of spent nuclear fuel. Two major nuclear accidents are summarized: the 1986 Chernobyl disaster, where a nuclear reactor exploded in Ukraine, and the 2011 Fukushima Daiichi nuclear disaster in Japan caused by an earthquake and tsunami. The effects of nuclear pollution on health and the environment are outlined. Suggested preventative measures include proper disposal of nuclear waste and ensuring safety at nuclear power plants.
This document summarizes the radiological implications of the Fukushima Nuclear Power Plant accident on human health. It discusses the acute and long-term health effects of radiation exposure, noting increased cancer risk. The main radionuclides of concern, iodine-131 and cesium-137, can contaminate food and water if ingested. Public health actions recommended include evacuation, sheltering, distributing iodine pills, and restricting locally produced foods and milk. Ongoing radiation monitoring is being conducted in the area.
Heart Touching Romantic Love Shayari In English with ImagesShort Good Quotes
Explore our beautiful collection of Romantic Love Shayari in English to express your love. These heartfelt shayaris are perfect for sharing with your loved one. Get the best words to show your love and care.
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KALYAN MATKA | MATKA RESULT | KALYAN MATKA TIPS | SATTA MATKA | MATKA.COM | MATKA PANA JODI TODAY | BATTA SATKA | MATKA PATTI JODI NUMBER | MATKA RESULTS | MATKA CHART | MATKA JODI | SATTA COM | FULL RATE GAME | MATKA GAME | MATKA WAPKA | ALL MATKA RESULT LIVE ONLINE | MATKA RESULT | KALYAN MATKA RESULT | DPBOSS MATKA 143 | MAIN MATKA
Boudoir photography, a genre that captures intimate and sensual images of individuals, has experienced significant transformation over the years, particularly in New York City (NYC). Known for its diversity and vibrant arts scene, NYC has been a hub for the evolution of various art forms, including boudoir photography. This article delves into the historical background, cultural significance, technological advancements, and the contemporary landscape of boudoir photography in NYC.
This tutorial offers a step-by-step guide on how to effectively use Pinterest. It covers the basics such as account creation and navigation, as well as advanced techniques including creating eye-catching pins and optimizing your profile. The tutorial also explores collaboration and networking on the platform. With visual illustrations and clear instructions, this tutorial will equip you with the skills to navigate Pinterest confidently and achieve your goals.
1. G Thomas NI/RCS 6/2/14
Professor Gerry Thomas
Professor of Molecular Pathology ICL
Director, Chernobyl Tissue Bank (www.chernobyltissuebank.com)
gerry.thomas@imperial.ac.uk
HEALTH EFFECTS OF NUCLEAR POWER
INCIDENTS – WHERE CHEMISTRY AND
PHYSICS COMBINE TO DRIVE BIOLOGY
2. G Thomas NI/RCS 6/2/14
Public Perception of Radiation
http://www.newscientist.com/article/dn20403-25-years-after-chernobyl-we-dont-know-how-many-died.html
http://www.globalresearch.ca/new-book-concludes-chernobyl-death-toll-985-000-mostly-from-cancer/20908
3. G Thomas NI/RCS 6/2/14
0% 0% 1%
8%
24%
33%
9%
24%
0% 0%
2%
8%
21%
25%
10%
33%
none several tens hundreds thousands hundred
thousands
above one
million
I don't know
Chernobyl
Fukushima
-All Russia omnibus 24.10.2012
-Chernobyl accident happened in 1986. In you opinion, how many people died because of the
Chernobyl radiation exposure?
- Fukushima accident happened in Japan in 2011. In you opinion, how many people died because of
the Fukushima radiation exposure?
Public Perception of Radiation
5. G Thomas NI/RCS 6/2/14
Separating Fact from Fiction
• We live in a naturally radioactive world, and as a
species have developed biological mechanisms to
protect us
• More exposure from natural radiation than man-
made sources
• Annual dose varies around the world, and within a
single country
6. G Thomas NI/RCS 6/2/14
http://whqlibdoc.who.int/publications/2012/9789241503662_eng.pdf
Sources of radiation
7. G Thomas NI/RCS 6/2/14
Source of Exposure Dose
Dental X-ray 0.005mSv
135g of Brazil Nuts 0.005mSv
Chest X-ray 0.02mSv
Transatlantic flight 0.07mSv
Nuclear Power station worker, average annual dose 0.18mSv
UK average annual radon dose 1.3mSv
CT scan of the head 1.4mSv
UK average annual dose 2.7 mSv
CT scan of the chest 6.6 mSv
Whole body CT scan 10 mSv
Annual limit for nuclear radiation workers 20mSv
Level at which increased cancer incidence seen 100mSv
LD50 (within a month of exposure) 5000mSv
http://www.hpa.org.uk/Topics/Radiation/UnderstandingRadiation/UnderstandingRadi
ationTopics/DoseComparisonsForIonisingRadiation/
Relative radiation doses
8. G Thomas NI/RCS 6/2/14
• For radiation to cause damage to cells, it
must come into contact with them.
• Mechanism of contact depends on type of
radiation – wave (g, X-ray) or particulate
(a, b).
• Radiation exposure can be external (g) or
internal (a, b)
Radiation facts
9. G Thomas NI/RCS 6/2/14
Dose of radiation falls
rapidly with distance
from source (inverse
square law)
Environmental and health consequences of a
nuclear accident depend on physics,
chemistry and biology
Radiation facts
10. G Thomas NI/RCS 6/2/14
Physical half-life governs the time
period of release of radiation
Short physical half-life means that
radiation is released quickly i.e. it has a
high dose rate
Long physical half life means that
radiation is released over a long period
of time i.e. it has a lower dose rate
Radiation Physics
11. G Thomas NI/RCS 6/2/14
To damage cellular
structures inside the
body, isotopes that emit
alpha and beta radiation
need to be inhaled or
ingested
Different types of radiation have different energies
– affects how far they can penetrate
Radiation Physics - Biology
12. G Thomas NI/RCS 6/2/14
• Biological structures exist in a constant state
of flux – chemicals pass in and out of the
structure
• Chemistry of the soil determines how the
radioactive isotopes behave in the
environment
• The interaction between chemistry and
biology determines how long a radioactive
isotope stays within a tissue
Radiation Chemistry
13. G Thomas NI/RCS 6/2/14
Environmental behaviour depends on
physical and chemical nature of
element
type of fallout (dry or wet)
characteristics of environment
Radiation Chemistry - Ecology
14. G Thomas NI/RCS 6/2/14
Routes for human exposure
• Inhalation of volatile isotopes e.g. 131-I, 137-Cs
• Ingestion of contaminated food
• Gamma radiation from groundshine
15. G Thomas NI/RCS 6/2/14
Radiation doses received influenced
by
route of exposure (inhalation,
ingestion etc)
type of economy (rural different
from city)
Eating habits of population
16. G Thomas NI/RCS 6/2/14
Active pump
mechanism
Binds to large
protein within
follicular lumen
Radiation Chemistry - Biology
17. G Thomas NI/RCS 6/2/14
Biological effect of radiation
depends on the amount of time
the radioactive isotope stays in
the body (biological half-life)
and the frequency with which
the isotope emits radiation
(physical half-life)
• Long physical half-life, short biological half-life – little
effect
• Short physical half-life, long biological half-life – big
problem
18. G Thomas NI/RCS 6/2/14
• Atomic bomb (Hiroshima and Nagasaki)
– large population exposed to high dose
radiation close to explosion site
– low doses to population further away
– mainly gamma, but some a and b
• Chernobyl accident
– Large dose to small numbers of people
– Low dose to majority of population
– Mainly b from isotopes of iodine and caesium
Health effects of radiation exposure
19. G Thomas NI/RCS 6/2/14
www.unscear.org/docs/reports/2008/1
1-80076_Report_2008_Annex_D.pdf
What was released?
NB: Release of Cs from
Fukushima about 1/5th of
release from Chernobyl.
Overall release about 10%
20. G Thomas NI/RCS 6/2/14
• Move population away from source
• Limit inhalation by staying inside and
keeping windows and doors shut
• Stop ingestion of contaminated foodstuffs
• Block uptake of radionuclides (e.g. stable
iodine prophylaxis)
Methods to limit exposure
21. G Thomas NI/RCS 6/2/14
Two types of health effects of radiation:
• Deterministic – effect is certain under specific
conditions e.g. high dose/ARS
• Stochastic – may or may not occur. Difficult to
predict on an individual level but effects seen
at a population level e.g. cancer after
radiation exposure
Effects on human health
22. G Thomas NI/RCS 6/2/14
• 134 cases of ARS, 28
fatalities.
• 19 further deaths up to
2006 – but none thought to
be related to radiation.
• Increased incidence of
cataracts in those with
highest doses
14 normal, healthy children born to ARS survivors
within 5 years of the accident
Effects on human health - ARS
www.unscear.org/docs/reports/2008/11-80076_Report_2008_Annex_D.pdf
23. G Thomas NI/RCS 6/2/14
The needle in the haystack….
www.unscear.org/docs/reports/2008/11-80076_Report_2008_Annex_D.pdf
24. G Thomas NI/RCS 6/2/14
• Recent (2008) UNSCEAR report suggests
that the most serious health effect of the
accident was psychological – not physical
• Only proven radiobiological effect on health of
population has been increase in thyroid cancer in
those exposed as children
Health effects on the population
25. G Thomas NI/RCS 6/2/14
• First reports of an increase in
thyroid cancer in 1990,
particularly in children.
• Every cancer
has a
spontaneous
incidence
26. G Thomas NI/RCS 6/2/14
• Evacuees – thyroid dose 500mGy
• Not evacuated but resident in contaminated
areas - thyroid doses 100mGy
• Whole body doses to 6M residents = 9mSv
– 80% of lifetime dose delivered by 2005
• 150,000 people living in most contaminated
areas – 50mSv over 20 years (natural
radiation average 1-2 mSv per year)
Doses to the population
27. G Thomas NI/RCS 6/2/14
Cohort effect – carrying the risk
with you
28. G Thomas NI/RCS 6/2/14
• Exposure
• Milk, dairy produce
• Small thyroid – larger dose to gland
• Biology
• Thyroid still developing
• Increase in mutated clone size as a result of
developmental growth
Why children?
29. G Thomas NI/RCS 6/2/14
• Thyroid cancer treated by total thyroidectomy,
radioiodine treatment for metastatic tumour deposits
• Recurrence requiring further treatment c30%
• Recurrence leading to death very rare – in England and
Wales series with 20 year follow-up only 3%
• Studies suggest this may be lower in post Chernobyl
thyroid cancer (about 1%)
Tuttle et al., 2011 Clinical Oncology 23 (2011) 268-275
Treatment of thyroid cancer
30. G Thomas NI/RCS 6/2/14
– 28 from ARS
– 15 deaths from thyroid cancer in 25 years
– 1% death rate overall predicted for thyroid cancer.
Predicted total death rate thus far approx 60
– No (scientific) evidence of increased thyroid cancer
outside 3 republics
– No effect on fertility, malformations or infant mortality
– No conclusion on adverse pregnancy outcomes or
still births
– Heritable effects not seen and very unlikely at these
doses
Chernobyl – 28 years on
31. G Thomas NI/RCS 6/2/14
Recent findings suggest:
an increase of leukaemia risk among Chernobyl
liquidators
an increase in the incidence of pre-menopausal
breast cancer in the most contaminated districts,
possible low-dose effects on risk of cataracts
and cardiovascular diseases.
… need to be further investigated as lots of
confounders
Chernobyl – 28 years on
32. G Thomas NI/RCS 6/2/14
Muirhead (2003) Radiation Protect Dosim 104: 331-335
Is this surprising?
Average loss of life expectancy for those who received non-zero
doses is estimated to be 4 months. Cologne JB, Preston DL. Lancet
2000;356:303-7.
5% of all cancer deaths likely to be due to radiation – 95% due to
other causes
34. G Thomas NI/RCS 6/2/14
• Move population away from
source
• Limit inhalation by staying inside
and keeping windows and doors
shut
• Stop ingestion of contaminated
foodstuffs
• Block uptake of radionuclides
(e.g. stable iodine prophylaxis)
Chernobyl vs Fukushima
?
35. G Thomas NI/RCS 6/2/14
On site
• 19,594 workers, 167 received doses of >100 mSv
(6 >250mSv)
• No ARS, no radiation related deaths
Population at large
• 150,000 people evacuated, sample of 1700
showed 98% <5mSv, only 10 >10mSv
• Mean thyroid dose 4.2mSv in children (3.5 mSv
adults) compared with 500mSv in Chernobyl
evacuees
Radiation doses
36. G Thomas NI/RCS 6/2/14
• No radiation related deaths compared with
761 who died as a result of the
evacuation, and 20,000 in tsunami
• Unlikely to be any increase in thyroid
cancer at the doses received
• Psychological harm due to evacuation and
radiophobia – very likely
• Huge economic effect on local area and
Japan as a whole
Fukushima Health effects
37. G Thomas NI/RCS 6/2/14
• Fukushima health survey will produce large
amounts of data that must be interpreted for
the public – or it will be misinterpreted by the
press and others
Radiation effect or
screening artifact?
38. G Thomas NI/RCS 6/2/14
• Thyroid doses (from radioiodine) less than 1/100th
those of Chernobyl (4.2mSv vs 500 mSv)
• Screening shifts natural incidence curve to the left
• Frequency in Fukushima no higher than elsewhere
in Japan
• Frequency of screen detected cancer is always
higher than statistics on cancer operations – do
not confuse the two!
• WHO and UNSCEAR reports state that there will be
negligible health risks from Fukushima
39. G Thomas NI/RCS 6/2/14
• Radiation exposure can increase cancer incidence in
an exposed population.
• Type of cancer depends on the type of radiation,
dose and whether isotope is concentrated in
particular tissue (by route of exposure or biology).
• Young people more at risk than older people
• Need to put risk from exposure to radiation into
context with risk from other agents that cause cancer
– risk communication
What have we learnt?
41. G Thomas NI/RCS 6/2/14
NB Radiation doses from nuclear accidents much lower than from A-bomb,
so risk even lower
42. G Thomas NI/RCS 6/2/14
Health effects of energy production
Deaths and illness expressed as per TW (W12) for
different sources of energy
Markandya and Wilkinson, Lancet (2007) 370: 979-90
43. G Thomas NI/RCS 6/2/14
• Politics gets in the way of good science
• Health consequences of a Nuclear Power plant
accident may not be as bad as we first thought
• Don’t believe everything you read on the internet
or in the media
Take home messages
• We must separate fact from fiction to decide our
future energy policy
• Effects of climate change likely to kill more than
nuclear accidents
44. G Thomas NI/RCS 6/2/14
Radiation doses in perspective
• http://www.bbc.co.uk/news/magazine-15288975
• http://xkcd.com/radiation/
Chernobyl
• www.chernobyltissuebank.com
• http://www.chernobyltissuebank.com/clinical_oncology.html
Fukushima
Further on-line info
• http://www.world-nuclear-
news.org/taghub.aspx?tagid=Fukushima