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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, Korea. OUTLINE of OCCUPATIONAL EXPOSURE at JAPANESE NPPs in FY 2009 and the ISOE ATC Activity. Akiko SUZUKI Nuclear Energy System Safety Division Japan Nuclear Energy Safety Organization (JNES). Nuclear Power Plants in Japan.

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OUTLINE of OCCUPATIONAL EXPOSURE at JAPANESE NPPs in FY 2009 and the ISOE ATC Activity

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  1. 2010 ISOE Asian ALARA Symposium August 30- 31, 2010, Gyeongju, Korea OUTLINE of OCCUPATIONAL EXPOSURE at JAPANESE NPPs in FY 2009 andthe ISOE ATC Activity Akiko SUZUKI Nuclear Energy System Safety Division Japan Nuclear Energy Safety Organization (JNES)

  2. Nuclear Power Plants in Japan as of January1, 2010

  3. Oma 55 Units in Operation (PWR 23, BWR 32) as of March 31, 2006 Shika 志賀 Namie-Odaka ふげん Fugen Tomari 2 2 (2003 ) 年より廃止措置準備中 (on a decommissioning stage since 2003) Kashiwazaki-kariwa Higashi Dori Higashi Dori TEPCO Onagawa 女川 Tsuruga 敦賀 2 1 1 Fukushima Daiichi 福島第一 Mihama 8 8 7 7 Fukushima Daini Ohi Tokai Takahama (On the decommissioning stage since 1998) Tokai No. 2 3 Shimane Hamaoka Kaminoseki 5 5 5 5 5 6 (Unit 1,2On the decommissioning stage since 2009) Ikata Genkai Sendai In operation 3 Under Construction 出力規模 Output scale On planning stage Total 54 Units 48,847MWe (PWR 24 units, BWR 30 units ) 合計 53 基 出力 47,122MWe Less than More than 50 kW 万 未満 Less than 100 kW 100 kW 万 未満 万 以上 500,000kW 1,000,000kW 1,000,000kW Nuclear Power Plants in Japan

  4. Nuclear Power Plants in Japan Average Individual Dose in Fiscal Year 2009(April 2009 – March 2010) 1.Includes Hamaoka Unit No.1 & No.2 in BWRs that have been decommissioning since Nov.18,2009.

  5. Nuclear Power Plants in Japan Trend of Average Individual Dose

  6. Nuclear Power Plants in Japan Collective Dose in Fiscal Year 2009 (April 2009 – March 2010) 1.Includes Hamaoka Unit No.1 & No.2 in BWRs that have been decommissioning since Nov.18,2009.

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

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

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

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

  11. ISOE Network – Data collection

  12. BWR Average Collective Dose per Reactor by Country(1980-2008) (Person.Sv/ unit)

  13. PWR Average Collective Dose per Reactor by Country(1980-2008) (Person.Sv/ unit)

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

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

  16. 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.

  17. The ISOE database Average collective dose by Job(CRD) per outage (2004-2008) Problems in comparing the exposure by Job/ task - Scope of Job/ task lack clear definition -The number of units that input data is insufficient

  18. ISOE Network – RP forum

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

  20. ISOE-ATC Web site ATC Database http://www.jnes.go.jp/isoe/english/ • The data for Japan, Rep. of Korea and Taiwan. • The data for Japanese NuclearFacilities, including Fabrication facilities, Reprocessing facilities, Waste burial facilities and Waste management facilities.

  21. 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.

  22. Thank you for your attention !!

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