Fission yield covariance generation and uncertainty propagation

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Fission yield covariance generation and uncertainty propagation. / Fiorito, Luca; Stankovskiy, Alexey; Van den Eynde, Gert; Diez, Carlos; Cabellos, Oscar; Labeau, Pierre-Etienne; Krása, Antonin (Peer reviewer).

In: Annals of nuclear energy, Vol. 69, No. 1, 01.07.2014, p. 331-343.

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Fiorito, Luca ; Stankovskiy, Alexey ; Van den Eynde, Gert ; Diez, Carlos ; Cabellos, Oscar ; Labeau, Pierre-Etienne ; Krása, Antonin. / Fission yield covariance generation and uncertainty propagation. In: Annals of nuclear energy. 2014 ; Vol. 69, No. 1. pp. 331-343.

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@article{603f5bf914324af49d37c5a3e142cf6a,
title = "Fission yield covariance generation and uncertainty propagation",
abstract = "Fission product yields are fundamental parameters in burnup/activation calculations and the impact of their uncertainties was widely studied in the past. Evaluations of these uncertainties were released, still without covariance data. Therefore, the nuclear community expressed the need of full fission yield covariance matrices to be able to produce inventory calculation results that take into account the complete uncertainty data. Fission yield data and methodologies for fission yield covariance generation were researched in this work. Covariance matrices were generated and compared to the original data stored in the library. Then, we focused on the effect of fission yield covariance information on fission pulse decay heat results for thermal fission of 235U. Calculations were carried out using different libraries and codes after introducing the new covariance values. Results were compared with those obtained with the uncertainty data currently provided by the libraries. The uncertainty quantification was performed first with Monte Carlo sampling and then compared with linear perturbation. Indeed, correlations between fission yields strongly affect the uncertainty of decay heat. Eventually, a sensitivity analysis of fission product yields to fission pulse decay heat was performed in order to provide a full set of the most sensitive nuclides for such a calculation.",
keywords = "fission yield, decay heat, covariance, nuclear data",
author = "Luca Fiorito and Alexey Stankovskiy and {Van den Eynde}, Gert and Carlos Diez and Oscar Cabellos and Pierre-Etienne Labeau and Antonin Kr{\'a}sa",
note = "Score = 10",
year = "2014",
month = jul,
day = "1",
doi = "10.1016/j.anucene.2014.01.038",
language = "English",
volume = "69",
pages = "331--343",
journal = "Annals of nuclear energy",
issn = "0306-4549",
publisher = "Elsevier",
number = "1",

}

RIS - Download

TY - JOUR

T1 - Fission yield covariance generation and uncertainty propagation

AU - Fiorito, Luca

AU - Stankovskiy, Alexey

AU - Van den Eynde, Gert

AU - Diez, Carlos

AU - Cabellos, Oscar

AU - Labeau, Pierre-Etienne

A2 - Krása, Antonin

N1 - Score = 10

PY - 2014/7/1

Y1 - 2014/7/1

N2 - Fission product yields are fundamental parameters in burnup/activation calculations and the impact of their uncertainties was widely studied in the past. Evaluations of these uncertainties were released, still without covariance data. Therefore, the nuclear community expressed the need of full fission yield covariance matrices to be able to produce inventory calculation results that take into account the complete uncertainty data. Fission yield data and methodologies for fission yield covariance generation were researched in this work. Covariance matrices were generated and compared to the original data stored in the library. Then, we focused on the effect of fission yield covariance information on fission pulse decay heat results for thermal fission of 235U. Calculations were carried out using different libraries and codes after introducing the new covariance values. Results were compared with those obtained with the uncertainty data currently provided by the libraries. The uncertainty quantification was performed first with Monte Carlo sampling and then compared with linear perturbation. Indeed, correlations between fission yields strongly affect the uncertainty of decay heat. Eventually, a sensitivity analysis of fission product yields to fission pulse decay heat was performed in order to provide a full set of the most sensitive nuclides for such a calculation.

AB - Fission product yields are fundamental parameters in burnup/activation calculations and the impact of their uncertainties was widely studied in the past. Evaluations of these uncertainties were released, still without covariance data. Therefore, the nuclear community expressed the need of full fission yield covariance matrices to be able to produce inventory calculation results that take into account the complete uncertainty data. Fission yield data and methodologies for fission yield covariance generation were researched in this work. Covariance matrices were generated and compared to the original data stored in the library. Then, we focused on the effect of fission yield covariance information on fission pulse decay heat results for thermal fission of 235U. Calculations were carried out using different libraries and codes after introducing the new covariance values. Results were compared with those obtained with the uncertainty data currently provided by the libraries. The uncertainty quantification was performed first with Monte Carlo sampling and then compared with linear perturbation. Indeed, correlations between fission yields strongly affect the uncertainty of decay heat. Eventually, a sensitivity analysis of fission product yields to fission pulse decay heat was performed in order to provide a full set of the most sensitive nuclides for such a calculation.

KW - fission yield

KW - decay heat

KW - covariance

KW - nuclear data

UR - http://ecm.sckcen.be/OTCS/llisapi.dll/open/ezp_134768

UR - http://knowledgecentre.sckcen.be/so2/bibref/11371

U2 - 10.1016/j.anucene.2014.01.038

DO - 10.1016/j.anucene.2014.01.038

M3 - Article

VL - 69

SP - 331

EP - 343

JO - Annals of nuclear energy

JF - Annals of nuclear energy

SN - 0306-4549

IS - 1

ER -

ID: 381428