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FP7

Reasons why Plutonium 242 is the best fission chamber deposit to monitor the fast component of a high neutron flux

Funded under: FP7-EURATOM

Abstract

The FNDS project aims at developing fission chambers to measure on-line the fast component of a high neutron flux (about 10{14}ncm{-2}s{-1} or more) with a significant thermal component. We identify with simulations the deposits of fission chambers that are best suited to this goal. We address the question of the evolution of the deposit by radiative capture and decay. A deposit of {242}Pu appears as the best choice, with a high initial sensitivity to fast neutrons only slowly degrading under irradiation. The effect of unavoidable impurities was assessed: small concentrations of {241}Pu and {239}Pu can be tolerated.

Additional information

Authors: FILLIATRE P, Département de Recherches sur la Fusion Contrôlée, Association Euratom-CEA sur la Fusion, CEA Cadarache, Saint-Paul-lez-Durance (FR);ORIOL L, Département de Recherches sur la Fusion Contrôlée, Association Euratom-CEA sur la Fusion, CEA Cadarache, Saint-Paul-lez-Durance (FR);JAMMES C, Département de Recherches sur la Fusion Contrôlée, Association Euratom-CEA sur la Fusion, CEA Cadarache, Saint-Paul-lez-Durance (FR);VERMEEREN L, SCK-CEN, Mol (BE)
Bibliographic Reference: An article published in: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Volume 593, Issue 3, (2008), 9 pp.
Availability: This article can be accessed online by subscribers, and can be ordered online by non-subscribers, at: http://dx.doi.org/10.1016/j.nima.2008.05.049
Record Number: 200910155 / Last updated on: 2009-01-23
Category: PUBLICATION
Original language: en
Available languages: en
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