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Estimation of neutronics parameter sensitivity to nuclear data in random sampling-based uncertainty quantification calculations
| Title: | Estimation of neutronics parameter sensitivity to nuclear data in random sampling-based uncertainty quantification calculations |
| Authors: | Chiba, Go Browse this author →KAKEN DB | | Kawamoto, Yosuke Browse this author | | Tsuji, Masashi Browse this author | | Narabayashi, Tadashi Browse this author |
| Keywords: | Sensitivity profile | | Random sampling | | Uncertainty quantification |
| Issue Date: | Jan-2015 |
| Publisher: | Elsevier |
| Journal Title: | Annals of nuclear energy |
| Volume: | 75 |
| Start Page: | 395 |
| End Page: | 403 |
| Publisher DOI: | 10.1016/j.anucene.2014.08.049 |
| Abstract: | We propose a method to estimate sensitivity profiles of neutronics parameters with respect to nuclear data in random sampling-based uncertainty quantification calculations. The proposed method is tested to estimate sensitivity profiles of fast neutron systems criticalities. A high order effect in sensitivity profile estimation is found to be quite important, so a reverse sampling method is developed to mitigate the high order effect. With this reverse sampling method, detail energy group-wise sensitivity profiles can be estimated even though some fluctuations are observed in specific sensitivity profiles. Energy-integrated sensitivity profiles can be accurately calculated with the proposed method. With the estimated sensitivity profiles, partial uncertainties, that are neutronics parameters uncertainties induced by specific nuclear data uncertainties, are also calculated. Numerical tests reveal that the proposed method reproduces quite well the reference partial uncertainties. A simple and practical partial uncertainty estimation method, which only requires a covariance matrix between neutronics parameter and nuclear data, is also tested and assessed. |
| Type: | article (author version) |
| URI: | http://hdl.handle.net/2115/58006 |
| Appears in Collections: | 工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: 千葉 豪
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