The influence of burnup-dependent fission spectra on reactor pressure vessel irradiation

Frej Wasastjerna

Research output: Contribution to journalArticleScientificpeer-review

Abstract

The neutron source to be used in calculations of the irradiation of nuclear reactor pressure vessels depends not only on the power distribution in the core but also on the burnup distribution. The burnup affects both the strength and the spectrum of the source, with each effect increasing the displacement rate in the pressure vessel as the burnup in the outer parts of the core increases. For a VVER-440 reactor, each effect causes an ≍8 % increase going from fresh fuel to a burnup representative of a low-leakage loading scheme. For Western light water reactors, the increase due to the spectral effect may be somewhat larger. This work investigates the spectral effect and discusses practical ways of taking it into account in calculations.

Original languageEnglish
Pages (from-to)273 - 278
Number of pages6
JournalNuclear Science and Engineering
Volume115
Issue number3
DOIs
Publication statusPublished - 1993
MoE publication typeA1 Journal article-refereed

Fingerprint

Pressure vessels
Irradiation
Light water reactors
Neutron sources
Nuclear reactors

Cite this

@article{0dc03c776c5c45b8ba8321e4070426e1,
title = "The influence of burnup-dependent fission spectra on reactor pressure vessel irradiation",
abstract = "The neutron source to be used in calculations of the irradiation of nuclear reactor pressure vessels depends not only on the power distribution in the core but also on the burnup distribution. The burnup affects both the strength and the spectrum of the source, with each effect increasing the displacement rate in the pressure vessel as the burnup in the outer parts of the core increases. For a VVER-440 reactor, each effect causes an ≍8 {\%} increase going from fresh fuel to a burnup representative of a low-leakage loading scheme. For Western light water reactors, the increase due to the spectral effect may be somewhat larger. This work investigates the spectral effect and discusses practical ways of taking it into account in calculations.",
author = "Frej Wasastjerna",
year = "1993",
doi = "10.13182/NSE93-A24056",
language = "English",
volume = "115",
pages = "273 -- 278",
journal = "Nuclear Science and Engineering",
issn = "0029-5639",
publisher = "American Nuclear Society ANS",
number = "3",

}

The influence of burnup-dependent fission spectra on reactor pressure vessel irradiation. / Wasastjerna, Frej.

In: Nuclear Science and Engineering, Vol. 115, No. 3, 1993, p. 273 - 278.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - The influence of burnup-dependent fission spectra on reactor pressure vessel irradiation

AU - Wasastjerna, Frej

PY - 1993

Y1 - 1993

N2 - The neutron source to be used in calculations of the irradiation of nuclear reactor pressure vessels depends not only on the power distribution in the core but also on the burnup distribution. The burnup affects both the strength and the spectrum of the source, with each effect increasing the displacement rate in the pressure vessel as the burnup in the outer parts of the core increases. For a VVER-440 reactor, each effect causes an ≍8 % increase going from fresh fuel to a burnup representative of a low-leakage loading scheme. For Western light water reactors, the increase due to the spectral effect may be somewhat larger. This work investigates the spectral effect and discusses practical ways of taking it into account in calculations.

AB - The neutron source to be used in calculations of the irradiation of nuclear reactor pressure vessels depends not only on the power distribution in the core but also on the burnup distribution. The burnup affects both the strength and the spectrum of the source, with each effect increasing the displacement rate in the pressure vessel as the burnup in the outer parts of the core increases. For a VVER-440 reactor, each effect causes an ≍8 % increase going from fresh fuel to a burnup representative of a low-leakage loading scheme. For Western light water reactors, the increase due to the spectral effect may be somewhat larger. This work investigates the spectral effect and discusses practical ways of taking it into account in calculations.

U2 - 10.13182/NSE93-A24056

DO - 10.13182/NSE93-A24056

M3 - Article

VL - 115

SP - 273

EP - 278

JO - Nuclear Science and Engineering

JF - Nuclear Science and Engineering

SN - 0029-5639

IS - 3

ER -