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Title: Monte Carlo sensitivity analysis method for the effective delayed neutron fraction with the differential operator sampling method
Authors: Yamamoto, Toshihiro  kyouindb  KAKEN_id
Sakamoto, Hiroki
Author's alias: 山本, 俊弘
Keywords: Effective delayed neutron fraction
Monte Carlo
Sensitivity analysis
Differential operator
Issue Date: 1-Jun-2020
Publisher: Elsevier BV
Journal title: Annals of Nuclear Energy
Volume: 140
Thesis number: 107108
Abstract: An exact Monte Carlo method for evaluating the sensitivity coefficients of the effective delayed neutron fraction (βeff) with respect to nuclear data is developed using the differential operator sampling (DOS) method. This development includes combining the two characteristic features of the DOS method: the exact evaluation of βeff and the sensitivity analyses of the k- and α-eigenvalues. Numerical tests are performed to calculate the sensitivity coefficients of βeff with the newly developed Monte Carlo method. The new Monte Carlo method's sensitivities mostly are in accordance with the reference solutions that were obtained by a deterministic discrete ordinates method based on the perturbation theory. In particular, the sensitivities of βeff to the yield and spectrum of delayed neutrons, which are dominant contributors to the uncertainty of βeff, can be predicted precisely by the new method.
Rights: © 2020. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/.
The full-text file will be made open to the public on 1 June 2022 in accordance with publisher's 'Terms and Conditions for Self-Archiving'.
This is not the published version. Please cite only the published version. この論文は出版社版でありません。引用の際には出版社版をご確認ご利用ください。
URI: http://hdl.handle.net/2433/252321
DOI(Published Version): 10.1016/j.anucene.2019.107108
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