International Standard Problem (ISP) No.41; Containment iodine computer code exercise based on a Radionuclide Test Facility (RTF) experiment

国際標準問題41番; 放射性ヨウ素試験施設(RTF)の実験結果に基づく格納容器ヨウ素挙動に係る計算コード比較問題

Wren, J. C.*; Royen, J.*; Ball, J.*; Glowa, G.*; Rydl, A.*; Poletiko, C.*; Billarand, Y.*; Ewig, F.*; Funke, F.*; Zeh, P.*; 日高 昭秀   ; Gauntt, R.*; Young, M.*; Cripps, R.*; Herrero, B.*

Wren, J. C.*; Royen, J.*; Ball, J.*; Glowa, G.*; Rydl, A.*; Poletiko, C.*; Billarand, Y.*; Ewig, F.*; Funke, F.*; Zeh, P.*; Hidaka, Akihide; Gauntt, R.*; Young, M.*; Cripps, R.*; Herrero, B.*

The main goal of International Standard Problem (ISP) is to increase confidence in the validity and accuracy of the tools, which were used in assessing the safety of nuclear installations. Moreover, the exercises enable code users to gain experience and demonstrate their competence. The ISP No. 41 exercise, computer code exercise based on a Radioiodine Test Facility (RTF) experiment on iodine behavior in containment under severe accident conditions, is one of such ISP exercises. The codes used by the participants were LIRIC (AECL), MELCOR-I (SNL), IMPAIR (PSI, Siemens, GRS, and JAERI) and IODE (CIEMAT, IPSN and NRIR). This report presents a detailed description of the RTF tests used for the exercise, a brief description of the models/codes used and the modelling process and the description and interpretation of the results.