Performance investigation of the pulse and Campbelling modes of a fission chamber using a Poisson pulse train simulation code
Artikel i vetenskaplig tidskrift, 2015

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.

Fission chamber

Pulse mode

Simulation

Neutron flux monitoring

Filtered Poisson process

Författare

Zsolt Elter

Chalmers, Teknisk fysik, Nukleär teknik

C. Jammes

Commissariat a L'Energie Atomique CEA

Imre Pazsit

Chalmers, Teknisk fysik, Nukleär teknik

L. Pal

Magyar Tudomanyos Akademia

P. Filliatre

Commissariat a L'Energie Atomique CEA

Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

0168-9002 (ISSN)

Vol. 774 60-67

Ämneskategorier

Annan teknik

DOI

10.1016/j.nima.2014.11.065