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Challenges to the Future System of Radiation Protection

Challenges to the Future System of Radiation Protection. Kansai Electric Power Co. Japan. Purpose. To influence the current movement by the international RP community that supports a reduction of dose limits for “ tissue reactions ” by at least half

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Challenges to the Future System of Radiation Protection

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  1. Challenges to the Future System of Radiation Protection Kansai Electric Power Co. Japan IRPA13 201204

  2. Purpose • To influence the current movement by the international RP community that supports a reduction of dose limits for “tissue reactions” by at least half • Retain a strong scientific basis for the system of RP, in contrast to ICRP Publication on “tissue reactions” IRPA13 201204

  3. Concerns Regarding Publication • The understanding of epidemiological results from atomic bomb survivors • Should consider data from the Adult Health Study (AHS) IRPA13 201204

  4. Concerns Regarding Publication • Methodology of risk analysis (risk estimate and mechanisms) • Threshold doses for tissue reactions based on 1% incidence; stochastic limits based on 5% mortality rate. The relationship between risk of incidence and mortality should be defined. IRPA13 201204

  5. Concerns Regarding Publication • Mechanisms of tissue reactions • Do we have enough biological data? • Can we validly extrapolate effects from high dose/dose rate to the low dose/dose rate region? IRPA13 201204

  6. Counterproposal by WNA • Promote the understanding of epidemiological data from Hiroshima and Nagasaki • Promote the specific analysis of each type of circulatory disease IRPA13 201204

  7. Counterproposal by WNA • Discuss/clarify the relationship between incidence and mortality • Discussion of threshold is needed for defining risks • Risks for “tissue reactions” and “cataract” should be examined separately IRPA13 201204

  8. Counterproposal by WNA • Discuss concepts of “cell killing,”“severity,” and “non-targeted effects” • Recent biological findings outside of Europe suggest more data and discussions are needed IRPA13 201204

  9. Discussion on WNA/RPWG The specific data regarding non-cancer will be opened by ourselves in the next RPWG meeting which will be held in the middle of this September. See you in London. IRPA13 201204

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