• Share
  • Email
  • Embed
  • Like
  • Save
  • Private Content
Marine Environment Monitoring
 

Marine Environment Monitoring

on

  • 8,500 views

Assessment of IAEA Environment Laboratories on Data provided by Japan

Assessment of IAEA Environment Laboratories on Data provided by Japan

Update 7 April

Statistics

Views

Total Views
8,500
Views on SlideShare
8,455
Embed Views
45

Actions

Likes
0
Downloads
272
Comments
0

7 Embeds 45

http://twitter.com 26
http://paper.li 14
https://twitter.com 1
http://us-w1.rockmelt.com 1
http://tweetedtimes.com 1
https://twimg0-a.akamaihd.net 1
http://users.unjobs.org 1
More...

Accessibility

Categories

Upload Details

Uploaded via as Microsoft PowerPoint

Usage Rights

© All Rights Reserved

Report content

Flagged as inappropriate Flag as inappropriate
Flag as inappropriate

Select your reason for flagging this presentation as inappropriate.

Cancel
  • Full Name Full Name Comment goes here.
    Are you sure you want to
    Your message goes here
    Processing…
Post Comment
Edit your comment

    Marine Environment Monitoring Marine Environment Monitoring Presentation Transcript

    • Marine Environment Monitoring
      Assessment of IAEA Environment Laboratories on Data provided by Japan
      Update 7 April
      IAEA Environment Laboratories, Monaco
    • General comments
      • The contamination of the marine environment has occurred both through atmospheric fallout or washout with precipitation, and through discharges of contaminated water into the sea
      • Authorised discharge of low level contaminated water (4 April)
      • Japanese institutes continue to perform measurements in seawater at 30 m and 330 m off the discharge points of Dai-ichi NPP, as well at 10 km and 20 km off-shore and along two North-South transects situated 15 and 30 km off-shore
    • Seawater sampling offshore Fukushima carried out by Japanese Authorities
      Seawater sampling locations of Japanese Authorities
      • Transect about 30 km offshore, sampling points separated by 10 kilometres, surface and bottom seawater sampled
      • Additional sampling stations at 10 and 20 km offshore, for which both surface and bottom seawater are sampled (M9-M10)
      • New transect 15 km offshore
      • Mainly surface water was collected and analysed, but meanwhile also some analyses for deep water samples were carried out
      Map 1
    • Concentrations in sea water near discharge point of Unit 1-4
    • Concentrations in sea water near discharge point of
      Unit 5 and 6
    • I-131 concentration in sea water
    • Cs-137 concentration in sea water
    • Conclusions
      • The highest levels are still measured close to the coast, namely 30 m, 330 m and 10 km near-shore.
      • Concentration data from about 30 km off-shore show a generally decreasing time trend
      • It can be expected that, if no additional releases occur, the levels measured at the stations 30 km off-shore will continue to decrease significantly by dilution into deeper layers and dispersion by ocean currents
    • Conclusions
      The number of marine sampling points has been increased with a new North-South transect 15 km offshore
      One marine expert from IAEA Environmental Laboratories, Monaco has been in Japan to review and advise on marine sampling and measurements (back yesterday night) .