Advances in mechanistic understanding of iodine behaviour in PHEBUS-FP tests with the help of ab initio calculations

被引：23

作者：

Cantrel, Laurent ^{[1
,3
]}

Louis, Florent ^{[2
,3
]}

Cousin, Frederic ^{[1
,3
]}

机构：

[1] Inst Radioprotect & Surete Nucl, IRSN PSN RES SAG LETR, Ctr Cadarache, F-13115 St Paul Les Durance, France

[2] Univ Lille1 Sci & Technol, PhysicoChim Proc Combust & Atmosphere PC2A UMR CN, F-59655 Villeneuve Dascq, France

[3] Lab Rech Commun IRSN CNRS Lille1 Cinet Chim Combu, Ctr Cadarache, F-13115 St Paul Les Durance, France

来源：

ANNALS OF NUCLEAR ENERGY | 2013年 / 61卷

关键词：

Phebus-FP; Iodine; Ab initio calculations; Reactor coolant system; Kinetics; QUADRATIC CONFIGURATION-INTERACTION; FISSION-PRODUCT TRANSPORT; COUPLED-CLUSTER SINGLES; GAS-PHASE REACTIONS; ATOMS; CCSD; BR; CL;

D O I：

10.1016/j.anucene.2013.02.034

中图分类号：

TL [原子能技术]; O571 [原子核物理学];

学科分类号：

0827 ; 082701 ;

摘要：

Analysis of the results of the Phebus experimental program identified phenomena related to fission product behaviour that are insufficiently described by available empirical models. The combining experimental and theoretical strategy implemented by IRSN to develop models that are able to predict any pressurised water reactor (PWR) severe accident transient is illustrated here for one of these phenomena, the presence of gaseous iodine at the break of the reactor coolant system (RCS). Kinetics modelling of the (1,0,H) chemical system in the RCS under severe accident conditions computed using quantum chemistry and validated against separate-effect experiments are used to re-interpret with a notable improvement the FPT1 experimental data contrary to the FPT3 one. After being implemented in the ASTEC (Accident Source Term Evaluation Code) software, these new models will contribute to a reduction in uncertainties in the prediction of the iodine source term. (C) 2013 Elsevier Ltd. All rights reserved.

引用

页码：170 / 178

页数：9

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