International Standard Problem (ISP) No.41; Computer code comparison exercise based on a Radioiodine Test Facility (RTF) experiment on iodine behaviour in containment under severe accident conditions

Ball, J.*; Glowa, G.*; Wren, J.*; Rydl, A.*; Poletiko, C.*; Billarand, Y.*; Ewig, F.*; Funke, F.*; 日高 昭秀; Gauntt, R.*; et al.

NEA/CSNI/R(99)7, p.311 - 325, 1999/00

The ISP No.41 exercise resulted from a recommendation at the fourth iodine chemistry workshop held at PSI, Switzerland in 1996 for an International Standard Problem on iodine behavior models. The test selected for the comparison was a Radio Test Facility experiment. It was conducted in a stainless steel vessel at 25C and at a dose rate of 1.4 kGy/h to evaluate the effect of pH on irradiated aqueous solutions containing CsI. This paper discusses the results of ISP 41 exercise, with a primary focus on the evaluation and comparison of calculated results, and what they demonstrate about the aqueous iodine reaction subset within each model. The paper will also discuss the relative importance of mass transfer, surface adsorption and aqueous chemistry, and the sensitivity of each of the models to these phenomena. Finally, it will assess the applicability of the ISP 41 exercise to qualitative validation of the iodine models, and provide recommendations for continuing model evaluation.

Comparisons of Energy Dependent Point-wise Cross-section Generation Codes:RESEND,RESENDD,RECENT

長谷川 明; 成田 孟

JAERI-M 82-128, 46 Pages, 1982/09

JAERI-M-82-128.pdf:1.15MB

現在、核データのコミュニティーで広く使用されているエネルギー依存断面積計算コード、RESEND,RESENDD,RECENTの相互比較を行った。共通入力データ・ファイルとしては、ENDF/B-Vのドジメトリーー・ファイル(Vol531)が選ばれた。0Kの温度に対してPoint-Wise断面積が計算され、相互比較をやりやすくする為に620群のSAND-II群構造に縮約された。その結果RESEND、RESENDD、RECENT各コードの問題点が明らかにされた。本作業は、IAEAのDr.Cullenによって組織されたエネルギー依存断面積計算コードのベンチマークテストの一環として行なわれた。