Validation of neutron flux redistribution factors in JS']JSI TRIGA reactor due to control rod movements

被引:26
作者
Kaiba, Tanja [1 ]
Zerovnik, Gasper [1 ]
Jazbec, Anze [1 ]
Stancar, Ziga [1 ]
Barbot, Loic [2 ]
Fourmentel, Damien [2 ]
Snoj, Luka [1 ]
机构
[1] Jozef Stefan Inst, SI-1000 Ljubljana, Slovenia
[2] CEA, DEN, DER, Instrumentat Sensors & Dosimetry Lab, F-13108 St Paul Les Durance, France
关键词
Research reactor; TRIGA; Fission chamber; MCNP; Neutron flux redistribution factors; Control rod movement; POWER;
D O I
10.1016/j.apradiso.2015.06.026
中图分类号
O61 [无机化学];
学科分类号
070301 ; 081704 ;
摘要
For efficient utilization of research reactors, such as TRIGA Mark II reactor in Ljubljana, it is important to know neutron flux distribution in the reactor as accurately as possible. The focus of this study is on the neutron flux redistributions due to control rod movements. For analyzing neutron flux redistributions, Monte Carlo calculations of fission rate distributions with the JSI TRIGA reactor model at different control rod configurations have been performed. Sensitivity of the detector response due to control rod movement have been studied. Optimal radial and axial positions of the detector have been determined. Measurements of the axial neutron flux distribution using the CEA manufactured fission chambers have been performed. The experiments at different control rod positions were conducted and compared with the MCNP calculations for a fixed detector axial position. In the future, simultaneous on-line measurements with multiple fission chambers will be performed inside the reactor core for a more accurate online power monitoring system. (C) 2015 Elsevier Ltd. All rights reserved.
引用
收藏
页码:34 / 42
页数:9
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