0 OUTLINE of OCCUPATIONAL EXPOSURE at JAPANESE NPPs in FY 2009 and the ISOE ATC Activity 2010 ISOE Asian ALARA Symposium August 30- 31, 2010, Gyeongju,

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Presentation transcript:

0 OUTLINE of OCCUPATIONAL EXPOSURE at JAPANESE NPPs in FY 2009 and the ISOE ATC Activity 2010 ISOE Asian ALARA Symposium August , 2010, Gyeongju, Korea Akiko SUZUKI Nuclear Energy System Safety Division Japan Nuclear Energy Safety Organization (JNES)

1 Nuclear Power Plants in Japan as of January1, 2010 BWRPWRTotal In Operation No. of Units Output (MWe) 28,56920,27848,847 Under Construction No. of Units 202 Output (MWe) 2,7560 On Planning No. of Units 9312 Output (MWe) 11,8864,66616,552

2 Nuclear Power Plants in Japan

3 Nuclear Power Plants in Japan Average Individual Dose in Fiscal Year 2009 (April 2009 – March 2010) PlantsUnitsPersonsmSv/person BWR , PWR2428, LWR (BWR+PWR) 5681, Includes Hamaoka Unit No.1 & No.2 in BWRs that have been decommissioning since Nov.18,2009.

4 Nuclear Power Plants in Japan Trend of Average Individual Dose

5 Nuclear Power Plants in Japan Collective Dose in Fiscal Year 2009 (April 2009 – March 2010) PlantsUnitsPerson-SvPerson-Sv/Unit BWR PWR LWR (BWR+PWR) Includes Hamaoka Unit No.1 & No.2 in BWRs that have been decommissioning since Nov.18,2009.

6 Nuclear Power Plants in Japan Trend of BWR Average Collective Dose and Capacity Factor per Reactor

7 Nuclear Power Plants in Japan Trend of PWR Average Collective Dose and Capacity Factor per Reactor

8 ISOE Structure OECD/NEA CRPPH Secretariat (OECD/NEA,IAEA) Management Board Bureau ETC 13 countries NATC 3 countries IAEATC （ Non- OECD ） 11 countries ATC 2 Countries (Japan, Rep.of Korea) 65 Participating Utilities in 28 countries Regulatory authorities of 23 countries

9 1. Data Collection: ISOE database 2. Evaluation & Analysis of dose trend in Worldwide by using ISOE Data 3. Information Exchange between ISOE Participants: RP forum 4. Preparing Information Sheets (Korean ver. & Japanese ver.) 5. ISOE-ATC Website Activities of the ISOE-ATC

10 ISOE Network – Data collection

11 BWR Average Collective Dose per Reactor by Country( ) (Person.Sv/ unit)

12 PWR Average Collective Dose per Reactor by Country( ) (Person.Sv/ unit)

13 Annual average of the operation period and maintenance period by country (1999 – 2008)

14 Contribution of outage collective dose to total collective dose for Japanese NPPs (2004 – 2008) RATIO: Outage Collective Dose/Total Annual Collective Dose

15 Analysis ATC evaluated based on ISOE Database -outage RWP man.hours -outage dose by job -outage dose rate information Action ATC contacts each ISOE national coordinator to investigate the differences in outage work scope.

16 The ISOE database Average collective dose by Job (CRD) per outage ( ) Problems in comparing the exposure by Job/ task - Scope of Job/ task lack clear definition -The number of units that input data is insufficient

17 ISOE Network – RP forum

18 Information Sheets ATC is responsible for preparing Information sheets on the Republic of Korea and Japan. The annual topic The special topic

19 ISOE-ATC Web site ATC Database The data for Japan, Rep. of Korea and Taiwan. The data for Japanese Nuclear Facilities, including Fabrication facilities, Reprocessing facilities, Waste burial facilities and Waste management facilities.

20 ATC plans for the future … Enhancement of use the RP forum in ISOE Network. Promotion of linkages in Asian countries that don’t belong to ISOE-ATC, such as China, India, Pakistan and Taiwan etc. Ongoing exchange of experience and knowledge in occupational exposure reduction at NPPs at the Asian ALARA symposium.

21 Thank you for your attention !!