title: Discussion on optimisation below dose limit for public using background-cancer-risk-based approach.
abstract: To improve a radiological protection system, the lower bound of optimisation was discussed using a newly proposed background-cancer-risk-based approach. This approach provides a new finding that the standard deviation of the background cancer risk in Japan is 7.4 × 10(-5) y(-1). If this risk level corresponding to 1σ can be regarded as a non-concern level, it would be possible that the lower bound of optimisation of radiological protection could be set at 1 mSv y(-1), since the assumed risk of 1 mSv y(-1) is equivalent to ~5 × 10(-5) y(-1) obtained using the overall fatal risk coefficient of 5 % Sv(-1), which is lower than the non-concern level.
authors.affiliation: Radiation Safety Research Center, Central Research Institute of Electric Power Industry, 2-11-1 Iwadokita, Komae-shi, Tokyo 201-8511, Japan. thattori@criepi.denken.or.jp
authors.forename: Takatoshi
authors.initials: T
authors.lastname: Hattori
mesh_terms: D004781:Environmental Exposure; D006801:Humans; D009381:Neoplasms, Radiation-Induced / Q000209:etiology*; D011829:Radiation Dosage; D011834:Radiation Monitoring; D011835:Radiation Protection / Q000592:standards*; D018570:Risk Assessment