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Key input for RP Culture from JHPS

Key input for RP Culture from JHPS. 10 th Feb. 2011 Japan Health Physics Society (JHPS) CRIEPI, Japan Takatoshi Hattori. Goals for RP Culture. To give visibility to the fundamentals of RP (science and values) To promote radiation risk awareness

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Key input for RP Culture from JHPS

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  1. Key input for RP Culturefrom JHPS 10th Feb. 2011 Japan Health Physics Society (JHPS) CRIEPI, Japan Takatoshi Hattori

  2. Goals for RP Culture • To give visibility to the fundamentals of RP (science and values) • To promote radiation risk awareness • To promote shared responsibility among practitioners, operators, regulators and management • To maintain the RP heritage • To facilitate its transmission • To improve the quality and effectiveness of RP • To improve communication with society • To enhance the visibility of RP in our societies Ref. IRPA website( http://www.irpa.net/images/stories/2010/irpa-rp-culture-krk-3-5-2010.ppt)

  3. Needs for Visibility of RP • Probabilistic effect is a target of RP concerning public exposure below 1 mSv/y. • but, there is no actual and detectable health damage from exposure in the dose region below 1 mSv/y. • How can we ensure the visibility for such low probabilistic risk ? One of solution: Background based approach

  4. BG cancer mortality distribution Ref.: National Cancer Center Age-adjusted Cancer Mortality Rate under Age 75 by Prefectures (2005)

  5. Scientific knowledge #1 BG cancer risk and assumed risk due to man-made radioactive nuclides T. Hattori, Understanding of minute assumed risk due to radiation from man-made radioactive nuclides taking into consideration quantitative comparison with detriments based on background cancer mortality in Japan. Jpn. J. Health Phys., Vol. 45, No. 2, pp172-176 (2010). http://www.jstage.jst.go.jp/browse/jhps

  6. BG cancer incidence distribution • Radiation risk (detriment) in ICRP Pub. 103 was derived using database in Cancer Incidence in Five Continents Vol. VIII in International Agency for Research on Cancer (IARC). • The newest one is Cancer Incidence in Five Continents Vol. IX issued in 2009. 5 continents (6 regions) 60 countries (214 registries)

  7. Probability plot Mean：1.6×10-3 σ：3.8×10-4 World

  8. Probability plot (6 Continents) Asia Africa Oceania North America Europe Central & South America

  9. Probability plot (North America) North America Canada United States 5 x 10-5 assumed risk for 1 mSv/y 5 x 10-5 assumed risk for 1 mSv/y 5 x 10-5 assumed risk for 1 mSv/y

  10. Scientific knowledge #2 BG cancer risk and assumed risk due to man-made radioactive nuclides

  11. Summary • Fundamentals of RP is currently too difficult and sometimes ambiguous for understanding by public. • RP experts should have more comprehensive understanding of radiation risk on a basis of their own countries’ datato improve communication with their societies. • If we can propose an international program using platform of RP Culture, RP system in the region below 1 mSv/y could be evolved by comprehensive background cancer risk approach.

  12. Thank you for your attention ! Thank you for your attention !

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