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DC Field | Value | Language |
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dc.citation.endPage | 163 | - |
dc.citation.startPage | 157 | - |
dc.citation.title | ANNALS OF NUCLEAR ENERGY | - |
dc.citation.volume | 130 | - |
dc.contributor.author | Kong, Chidong | - |
dc.contributor.author | Lee, Deokjung | - |
dc.date.accessioned | 2023-12-21T18:55:05Z | - |
dc.date.available | 2023-12-21T18:55:05Z | - |
dc.date.created | 2019-03-18 | - |
dc.date.issued | 2019-08 | - |
dc.description.abstract | Until now, various studies focusing on subcriticality measurements have been conducted using the Rossi-alpha method. However, no guidelines have been provided for the source intensity and time bin size of the Rossi-alpha analysis. In this study, sensitivity analyses were performed to determine an optimized source intensity and time bin size for a numerical reactor model. Using the MCNP6 Monte Carlo code, fission count signals in the fuel region were tallied 50 times with different random seeds in real-time mode. These signals were applied to the Rossi-alpha method as detector signals. The estimated k eff values were compared to the reference k eff values generated by the MCNP6 criticality calculation. As a result of the sensitivity test for the neutron source intensity, the Rossi-alpha method has errors of 200 pcm or less when the source intensity is greater than 10 5 s −1 . It is shown that the standard deviations of 50 analyses are converged when the source intensity is greater than 10 5 s −1 . At the same time, as a result of the sensitivity test for the time bin size, the Rossi-alpha method shows errors less than 200 pcm when the time bin size is smaller than 10 −5 s. It is shown that the standard deviations of 50 analyses are converged when the time bins are smaller than 10 −5 s. For the numerical reactor model in this study, the threshold time bin size was set to 10 −5 s. However, it generally depends on the neutron generation time of the problem. Thus, it is recommended to set the neutron source intensity to 10 5 s −1 or higher and the time bins to the time of the neutron generation or less when the Rossi-alpha method is applied to subcriticality measurements in nuclear reactor cores. | - |
dc.identifier.bibliographicCitation | ANNALS OF NUCLEAR ENERGY, v.130, pp.157 - 163 | - |
dc.identifier.doi | 10.1016/j.anucene.2019.02.040 | - |
dc.identifier.issn | 0306-4549 | - |
dc.identifier.scopusid | 2-s2.0-85062098650 | - |
dc.identifier.uri | https://scholarworks.unist.ac.kr/handle/201301/27491 | - |
dc.identifier.url | https://www.sciencedirect.com/science/article/pii/S0306454919301094?via%3Dihub | - |
dc.identifier.wosid | 000471081200015 | - |
dc.language | 영어 | - |
dc.publisher | Elsevier Ltd | - |
dc.title | Sensitivity analysis of source intensity and time bin size for the Rossi-alpha method in a numerical reactor model | - |
dc.type | Article | - |
dc.description.isOpenAccess | FALSE | - |
dc.relation.journalWebOfScienceCategory | Nuclear Science & Technology | - |
dc.relation.journalResearchArea | Nuclear Science & Technology | - |
dc.type.docType | Article | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.subject.keywordAuthor | Subcriticality measurement | - |
dc.subject.keywordAuthor | Rossi-alpha | - |
dc.subject.keywordAuthor | Sensitivity analysis | - |
dc.subject.keywordAuthor | Source intensity | - |
dc.subject.keywordAuthor | Time bin size | - |
dc.subject.keywordAuthor | Numerical reactor model | - |
dc.subject.keywordPlus | TO-MEAN FORMULA | - |
dc.subject.keywordPlus | NEUTRON | - |
dc.subject.keywordPlus | SUBCRITICALITY | - |
dc.subject.keywordPlus | POLYETHYLENE | - |
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