Brugg, 04 June 2020
ICRP draft « Radiation Detriment Calculation Methodology »
Dear Colleagues
The Swiss Nuclear Safety Inspectorate (ENSI) takes all recommendations from the ICRP into account in their official regulatory work program. ENSI would like to thank the ICRP for providing the opportunity to review this important new ICRP draft « Radiation Detriment Calculation Methodology » that has been drafted by the ICRP Task Group 102 [1]. ENSI would also like to thank the chair person and all members of the TG 102 for their work done in preparing this draft.
Radiation detriment is defined as the excess of stochastic health effects in a group of exposed individuals to low-level radiation and their descendants compared to a non-exposed group. This draft report clarifies many aspects of the whole computation process used in Publication 103 [2] detriment calculations (data sources, risk models, computational methods and rationale for the choice of parameter values) and corrects some errors made in Publication 103 [2]. This important improvement in the clarification of all aspects of the calculation of radiation detriment is to be welcomed because not all details were clear enough in Publication 103 [2].
There are three general areas where this draft report is still either confusing or ambiguous or in the need of more ICRP guidance on the application of nominal risks, as detailed in sections 1-3 of the attachment [3]. Also, we would appreciate you taking notice of some further aspects mentioned in section 4 of the attachment [3].
Yours sincerely
Swiss Federal Nuclear Safety Inspectorate ENSI
References
[1] ICRP, 20xx. Radiation detriment calculation methodology. ICRP Publication 1XX. Ann. ICRP xx(x). ICRP ref: 4829-8874-8978.
[2] ICRP, 2007. The 2007 Recommendations of the International Commission on Radiological Protection. ICRP Publication 103. Ann. ICRP 37(2–4). ISBN 978-0-7020-3048-2.
Enclosure
[3] ENSI, 4 June 2020. Comments on the ICRP draft « Radiation Detriment Calculation Methodology.
Comment