Sensitivity of the Lumped Fission-Product Model to Different Fission-Product Cross-Section Libraries
作者:
IlbergD.,
SaphierD.,
YiftahS.,
期刊:
Nuclear Science and Engineering
(Taylor Available online 1975)
卷期:
Volume 58,
issue 4
页码: 445-449
ISSN:0029-5639
年代: 1975
DOI:10.13182/NSE75-A26800
出版商: Taylor&Francis
数据来源: Taylor
摘要:
AbstractThe extent to which the use of different fission-product cross sections (FPCS) affects the neutron multiplication factor keffin high burnup cores of fast reactors is evaluated. It is found that discrepancies of the order of 2.5% exist when different FPCS are used to calculate keffin the same core. These discrepancies are due to the absence of data on a number of fission-product isotopes present in some of the nuclear data libraries on the one hand, and large differences in the capture cross sections of some of the isotopes on the other. A list of fission-product isotopes is proposed that, when used, reduces discrepancies in keffto<1%. The important isotopes for fast-reactor burnup and keffcalculations in which large discrepancies exist are identified, and it is suggested that they be subjected to further evaluation to close the discrepancy gap.
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