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From sheltertonsc


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From sheltertonsc

  1. 1. From “Shelter” to New Safe Confinement A. Gora Deputy General Director for Personnel Management SSE “Chernobyl NPP“, Ukraine
  2. 2. Commissioning Turbine Hall Sight on turbogenerators TG-1,2 Development of established ChNPP capacities: September 26, 1977 – Unit 1 was commissioned December 21, 1978 – Unit 2 was commissioned December 3, 1981 – Unit 3 was commissioned December 21, 1983 – Unit 4 was commissioned2 ChNPP Strategic Planning Service
  3. 3. Accident of April 26, 1986 Accident at Chernobyl NPP Unit 4 occurred on April, 26, 1986 at 01:23:40 a.m. (Moscow time) It was possible to stop active release of radioactive substances from destroyed reactor only in the end of May, 19863 3 ChNPP Strategic Planning Service
  4. 4. Accident of April 26, 1986 The rate of gamma-radiation dose was up to 2,000 R/h (20 Sv/h) and mainly was determined by radiation from reactor breakdown itself, inside of which measurable values of dose rate amounted to 50,000 R/h (500 Sv/h).4 ChNPP Strategic Planning Service
  5. 5. Creation of Shelter Object• Designing of protective sarcophagus (Shelter) commenced on May 20, 1986;• Construction lasted 206 days and nights from June to November 1986.5 ChNPP Strategic Planning Service
  6. 6. New Safe Confinement Creation (NSC) In 2012 it is planned to start production of steel constructions of NSC Arch. Milestones for NSC creation: • Foundations construction completion – May, 2013. • Main Arch construction assembly – November, 2014. • NSC Commissioning – October, 2015.6 ChNPP Strategic Planning Service
  7. 7. ChNPP Units shutdown Chernobyl NPP Unit 3 was finally shutdown on December 15, 2000 at 13:17 according to the Decree of the President of Ukraine. Plant stopped power generation.7 ChNPP Strategic Planning Service
  8. 8. ChNPP Units shutdown Before the accident Chernobyl NPP generated 150.2 billion kW/h . After the accident – 158.6 billion kW/h. In total it was generated 308.8 billion kW/h.Shelter Unit 3 Unit 2 Unit 1Object1983÷1986 1981÷2000 1978÷1991 1977÷1996 Chernobyl NPP site from satellite 8 ChNPP Strategic Planning Service
  9. 9. STRESS-TEST In 2011 the Chernobyl NPP, the first among Ukrainian NPPs, performed the targeted unscheduled safety assessment of ChNPP nuclear facilities by its own forces taking into consideration the events at Fukushima 1 NPP (stress-test). The full-scale emergency trainings including personnel actions in case of accident and examination of the capabilities of emergency response units were conducted. Safety Improvement Plan for ChNPP facilities was developed: • control, collection and return system for ISF-1 leakages was created; • conditions enabling to connect a mobile diesel generator for ISF-1 consumers were created, tests were carried out; • it is planned to conduct psychological training of personnel aimed at increasing resistance to psychological stress, development of endurance, self-control, mutual supportiveness and interaction; • system of psychological selection and training of persons involved in managing the accidents with severe consequences is being developed (similar to system of operational personnel selection).9 ChNPP Strategic Planning Service
  10. 10. Spent Nuclear Fuel Management (SNF) At the moment reactors of Units 1, 2 and 3 are completely released from nuclear fuel. Fuel is only in cooling pools of Units 1 and 2. To reduce risks during New Safe Confinement construction, spent nuclear fuel was transferred from cooling pools of Unit 3 to Interim Spent Fuel Storage Facility (ISF-1). In order to improve nuclear safety, it was proposed to transport SNF from Units 1 and 2 to ISF-1 for storage. In November 2011, the State Nuclear Regulatory Inspectorate of Ukraine agreed the Decision to place all conditioned SNF from Units 1, 2 and 3 to ISF-1. Works on spent nuclear fuel transportation from cooling pools of Units 1 and 2 to ISF-1 were commenced.10 ChNPP Strategic Planning Service
  11. 11. The Final State of Decommissioning NPP can be changed ChNPP is located at the territory of Exclusion "Green field" status Zone contaminated with radioactive substances as a result of accident in 1986. That’s why decommissioning of Chernobyl NPP up to the "green field" status is unreasonable. A brown spot is a condition of ChNPP industrial "Brown spot" status site when its territory and buildings can be restricted released from the regulating control. Reuse of ChNPP site as “National operator of NPP units decommissioning, SNF and RAW management” is the most desirable final state: • a fast and cheap way to reach decommissioning Developed objectives industrial site • using financial and technical resources and qualified staff of ChNPP more effectively; • solving problems of nuclear industry.11 ChNPP Strategic Planning Service
  12. 12. SSE ChNPP Emergency Preparedness System System The Main Tasks of ChNPP Emergency Preparedness and Response System • Assurance of preparedness to eliminate accidents and emergencies at SSE “Chernobyl NPP” facilities; • Response to accidents and emergencies at the SSE “Chernobyl NPP” facilities; • Implementation of measures on protecting the NPP personnel and environment.12 ChNPP Strategic Planning Service
  13. 13. SSE ChNPP Emergency Preparedness System System Emergency organizational structures of SSE “Chernobyl NPP” includes:  Emergency Manager at industrial sites of SSE “Chernobyl NPP” facilities (EMS);  Coordination and Management Body – EMS Staff Office or SSE “Chernobyl NPP” Commission on the Issues of Emergencies (as a synonym);  Standing Management Body – Emergency Preparedness and Response Department (EP&RD);  SSE “Chernobyl NPP” emergency teams and units:  Radiation control unit;  Dosimetric survey unit;  Physical protection assurance unit;  Personnel sanitary treatment unit;  Transport unit, etc.;  Teams for elimination of equipment failures.13 ChNPP Strategic Planning Service
  14. 14. SSE ChNPP Emergency Units SSE ChNPP Emergency Units The Main Tasks of NPP Emergency Units are:  Actions on preventing beyond-design-basis accidents and eliminating their consequences;  Measures on personnel protection;  Recommendations on population protection. A General Director is an Emergency Manager at the ChNPP industrial site.14 ChNPP Strategic Planning Service
  15. 15. SSE ChNPP Emergency Units SSE ChNPP Emergency Units The Main Functions of EMS:  Primary and subsequent classification of an accident;  Notification of personnel and external organizations;  Initiation of Emergency Plan;  Management of actions on accident containment and elimination;  Coordination of actions of external organizations involved into emergency and rescue operations;  Provision of information to a Ministry of Emergencies management, regulatory body, authorities and mass media;  Decision-making on Emergency Plan’s ending. The SSE ChNPP personnel is contained in protective shelters having ‫-ץ‬radiation dose rate ≥ 0,5 mSv/h. The SSE ChNPP personnel is evacuated having ‫-ץ‬radiation dose rate ≥ 1 mSv/h.15 ChNPP Strategic Planning Service
  16. 16. Thank you for attention!16 ChNPP Strategic Planning Service