標準化されたスクリーニングは、先進炉の認可におけるNRCのリスク評価を支援する。 Standardized screening aids NRC risk assessment in advanced reactor licensing
2023-03-14 サンディア国立研究所(SNL)
このスクリーニング手法は、新しい原子炉の許可を検討している米国原子力規制委員会（NRC）に役立ち、新しい原子炉が許可された場合に備えて、その潜在的なリスクを正確に評価することができるようにすることを目的としている。特に、ヒートパイプ炉と呼ばれる新しい原子炉設計の可能性について、このスクリーニング方法を用いて評価を行った。
＜関連情報＞
ヒートパイプ炉インベントリを利用した先進炉放射性同位元素スクリーニングの定量的評価。 Quantitative Assessment for Advanced Reactor Radioisotope Screening Utilizing a Heat Pipe Reactor Inventory.
Clavier, Kyle; Clayton, Daniel; Faucett, Christopher
OSTI.GOV Published:2022-09-01
DOI:https://doi.org/10.2172/1886123
Abstract
This report document s a method for the quantitative identification of radionuclides of potential interest for accident consequence analysis involving advanced nuclear reactors . Based on previous qualitative assessments of radionuclide inventories for advanced r eactors coupled with the review of a radiological inventory developed for a heat pipe reactor , a 1 Ci activity airborne release was calculated for 137 radionuclides using the MACCS 4.1 code suite . Several assumptions regarding release conditions were made and discussed herein. The potential release of a heat pipe reactor inventory was also modeled following the same assumptions. Results provide an estimation of the relative EARLY and CHRONC phase dose contribution from advanced reactor radionuclides and are normalized to doses from equivalent releases of I – 131 and Cs – 137 , respectively . Ultimately, a list of 69 radionuclides with EARLY or CHRONC dose contributions at least 1/100 th that of I – 131 or Cs – 137, respectively ? 48 of which are currently considered fo r LWR consequence analyses ? was identified of being of potential importance for analyses involving a heat pipe reactor.
