Abstract
Results are presented of a sensitivity and uncertainty analysis of a NET iron/water inboard shielding blanket using energy self-shielded cross sections. Couple ({eta}{gamma}) transport calculations were performed in an S{sub 8}P{sub 3} approximation using cross sections from European Fusion File in the 121-group GAM-II structure. Energy self-shielding was taken into account using the Bondarenko method. Results of this analysis are compared with a similar analysis in which infinite dilute cross sections were used. It is shown that the effect of energy self- shielding on the neutron flux in coils of the NET design is considerable whereas the {gamma}-flux is hardly influenced. This causes the nuclear heating in the inboard coils to be increased by 13%. The relative uncertainty in nuclear heating due to uncertainties in the total cross sections of Fe, Cr and Ni decreases by 8% when self-shielding is taken into account. Also the effect of uncertainties in energy and angular distributions of the scattered neutrons (SED and SAD respectively) was studied. SED uncertainties appear to have only a minor effect. SAD uncertainties however, are quite important for elastic scattering. It is therefore concluded that more attention should be paid to these SAD uncertainties. (author). 16 refs.; 6 figs.;
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Hogenbirk, A
[1]
- Netherlands Energy Research Foundation (ECN), Petten (Netherlands)
Citation Formats
Hogenbirk, A.
Energy self-shielding and SED/SAD effects in sensitivity calculations of a NET shielding blanket.
Netherlands: N. p.,
1991.
Web.
Hogenbirk, A.
Energy self-shielding and SED/SAD effects in sensitivity calculations of a NET shielding blanket.
Netherlands.
Hogenbirk, A.
1991.
"Energy self-shielding and SED/SAD effects in sensitivity calculations of a NET shielding blanket."
Netherlands.
@misc{etde_10129890,
title = {Energy self-shielding and SED/SAD effects in sensitivity calculations of a NET shielding blanket}
author = {Hogenbirk, A}
abstractNote = {Results are presented of a sensitivity and uncertainty analysis of a NET iron/water inboard shielding blanket using energy self-shielded cross sections. Couple ({eta}{gamma}) transport calculations were performed in an S{sub 8}P{sub 3} approximation using cross sections from European Fusion File in the 121-group GAM-II structure. Energy self-shielding was taken into account using the Bondarenko method. Results of this analysis are compared with a similar analysis in which infinite dilute cross sections were used. It is shown that the effect of energy self- shielding on the neutron flux in coils of the NET design is considerable whereas the {gamma}-flux is hardly influenced. This causes the nuclear heating in the inboard coils to be increased by 13%. The relative uncertainty in nuclear heating due to uncertainties in the total cross sections of Fe, Cr and Ni decreases by 8% when self-shielding is taken into account. Also the effect of uncertainties in energy and angular distributions of the scattered neutrons (SED and SAD respectively) was studied. SED uncertainties appear to have only a minor effect. SAD uncertainties however, are quite important for elastic scattering. It is therefore concluded that more attention should be paid to these SAD uncertainties. (author). 16 refs.; 6 figs.; 3 tabs.}
place = {Netherlands}
year = {1991}
month = {May}
}
title = {Energy self-shielding and SED/SAD effects in sensitivity calculations of a NET shielding blanket}
author = {Hogenbirk, A}
abstractNote = {Results are presented of a sensitivity and uncertainty analysis of a NET iron/water inboard shielding blanket using energy self-shielded cross sections. Couple ({eta}{gamma}) transport calculations were performed in an S{sub 8}P{sub 3} approximation using cross sections from European Fusion File in the 121-group GAM-II structure. Energy self-shielding was taken into account using the Bondarenko method. Results of this analysis are compared with a similar analysis in which infinite dilute cross sections were used. It is shown that the effect of energy self- shielding on the neutron flux in coils of the NET design is considerable whereas the {gamma}-flux is hardly influenced. This causes the nuclear heating in the inboard coils to be increased by 13%. The relative uncertainty in nuclear heating due to uncertainties in the total cross sections of Fe, Cr and Ni decreases by 8% when self-shielding is taken into account. Also the effect of uncertainties in energy and angular distributions of the scattered neutrons (SED and SAD respectively) was studied. SED uncertainties appear to have only a minor effect. SAD uncertainties however, are quite important for elastic scattering. It is therefore concluded that more attention should be paid to these SAD uncertainties. (author). 16 refs.; 6 figs.; 3 tabs.}
place = {Netherlands}
year = {1991}
month = {May}
}