Phenomena identification ranking tables for accident tolerant fuel designs applicable to severe accident conditions

Khatib-Rahbar, M.*; Barrachin, M.*; Denning, R.*; Gabor, J.*; Gauntt, R.*; Herranz, L. E.*; Hobbins, R.*; Jacquemain, D.*; 丸山 結; Metcalf, J.*; et al.

NUREG/CR-7282, ERI/NRC 21-204 (Internet), 160 Pages, 2021/04

The U.S. Nuclear Regulatory Commission (NRC) is preparing to accept anticipated licensing applications for the commercial use of accident tolerant fuel (ATF) in commercial nuclear power plants in the United States. It is the objective of the NRC to evaluate the effects of ATF designs on severe accident behavior, and to determine potential changes to the NRC severe accident analysis computer codes that would simulate plant conditions using ATFs commensurate with the accuracy in accident analyses involving conventional fuels. This report documents the development of Phenomena Identification and Ranking Tables (PIRTs) for near-term ATFs under severe accident conditions in light water reactors (LWRs). The PIRTs were developed by a panel of experts for various near-term ATF design concepts (i.e., FeCrAl cladding, zirconium alloy cladding coated with chromium, and CrO dopants in uranium dioxide fuels) in addition to the impacts from fuel enrichment and burnup. Panel members also considered the severe accident implications of the longer-term ATF concepts. The main figures-of-merit considered in this ranking process are the amount of fission products released into the containment and the quantity of combustible gases generated during an accident. Special focus is given to whether existing severe accident codes and models would be sufficient as applied to LWRs employing these fuels, and whether additional experimental studies or model development would be warranted.

被覆粒子燃料のスイープガスキャプセル照射試験,(I); 74F-9Jキャプセルによる照射

福田 幸朔; 小川 徹; 鹿志村 悟; 井川 勝市; 岩本 多實; 山本 克宗; 鈴木 紘; 松島 秀夫

JAERI-M 84-054, 65 Pages, 1984/03

JAERI-M-84-054.pdf:2.84MB

本報告は、原研で最初のスイープガスキャプセルによる照射試験に関するものである。照射試験の目的は、照射下におけるFPガス放出の測定により、破覆粒子の照射健全性を調べることであり、またスイープガスキャプセル(74F-9J)に装荷した破覆粒子は、48,49年度に予備設計仕様にもとづいて試作されたものであり、これらはルーズな状態で照射された。照射中には、装荷破覆粒子からのFPガス放出率を測定し、放出率より破覆粒子破損率の推定を行うとともに、照射後試験で、外観検査、X線ラジオグラフィ、酸漏出などにより破覆粒子破損率を求めた。また、キャプセル内で破覆粒子を保持していた黒鉛ホルダーには金属FPガスが吸着しており、このガンマ線測定から、Cs放出率を求めた。

The use of radioactive fission product rare gases for the study of the change in crystal structure

矢島 聖使; 市坡 純雄; 亀本 雄一郎; 柴 是行

Bulletin of the Chemical Society of Japan, 34(1), p.133 - 136, 1961/00

https://doi.org/10.1246/bcsj.34.133

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