Abstract
The SCALP collaboration has the ambition to build a scintillating ionization chamber in order to study and measure the cross section of the α-particle production in neutron induced reactions. More specifically on 16 O and 19 F targets. Using the deposited energy (ionization) and the time of flight measurement (scintillation) with a great accuracy, all the nuclear reaction taking part on this project will be identify.
Highlights
Introduction and motivationIn a nuclear reactor, alpha production due to neutron induced reactions on the oxygen of the uranium oxide is a sizeable contribution which affects the installation physical parameters
Oxygen is present in the water of thermal neutron nuclear reactor and in fuel elements of thermal and fast neutron reactor [1]
SCALP is an ionization chamber filled with a mixture of CF4 and a few percent of CO2
Summary
Alpha production due to neutron induced reactions on the oxygen of the uranium oxide is a sizeable contribution which affects the installation physical parameters. Oxygen is present in the water of thermal neutron nuclear reactor (as coolant and moderator) and in fuel elements (uranium oxide or mixed oxide) of thermal and fast neutron reactor [1]. The 16O(n,α) cross section reaction affects the keff prediction (it is responsible for 100 pcm on the total uncertainty). (n,α) reaction on light elements can be a significant source of helium production. The (n,α) reaction on oxygen contributes to an extent of 25% of the overall helium production in these kind of reactors. The uncertainty of helium production due to 16O(n,α) is about 7%
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