Performance investigation of the pulse and Campbelling modes of a fission chamber using a Poisson pulse train simulation code

被引：36

作者：

Elter, Z. S. ^{[1
,2
]}

Jammes, C. ^{[1
]}

Pazsit, I. ^{[2
]}

Pal, L. ^{[3
]}

Filliatre, P. ^{[1
]}

机构：

[1] CEA, DEN, DER, Instrumentat Sensors & Dosimetry Lab, F-13108 St Paul Les Durance, France

[2] Chalmers, Dept Appl Phys, Div Nucl Engn, SE-41296 Gothenburg, Sweden

[3] Hungarian Acad Sci, Ctr Energy Res, H-1525 Budapest, Hungary

来源：

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT | 2015年 / 774卷

基金：

瑞典研究理事会;

关键词：

Neutron flux monitoring; Fission chamber; Filtered Poisson process; Simulation; Pulse mode; Campbelling mode; NEUTRON-FLUX MEASUREMENT; REACTORS;

D O I：

10.1016/j.nima.2014.11.065

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

The detectors of the neutron flux monitoring system of the foreseen French GEN-IV sodium-cooled fast reactor (SFR) will be high temperature fission chambers placed in the reactor vessel in the vicinity of the core. The operation of a fission chamber over a wide-range neutron flux will be feasible provided that the overlap of the applicability of its pulse and Campbelling operational modes is ensured. This paper addresses the question of the linearity of these two modes and it also presents our recent efforts to develop a specific code for the simulation of fission chamber pulse trains. Our developed simulation code is described and its overall verification is shown. An extensive quantitative investigation was performed to explore the applicability limits of these two standard modes. It was found that for short pulses the overlap between the pulse and Campbelling modes can be guaranteed if the standard deviation of the background noise is not higher than 5% of the pulse amplitude. It was also shown that the Campbelling mode is sensitive to parasitic noise, while the performance of the pulse mode is affected by the stochastic amplitude distributions. (C) 2014 Elsevier B.V. All rights reserved.

引用

页码：60 / 67

页数：8

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