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DC Field | Value | Language |
---|---|---|
dc.citation.endPage | 57 | - |
dc.citation.number | 1 | - |
dc.citation.startPage | 41 | - |
dc.citation.title | NUCLEAR SCIENCE AND ENGINEERING | - |
dc.citation.volume | 180 | - |
dc.contributor.author | Lee, Deokjung | - |
dc.contributor.author | Choi, Sooyoung | - |
dc.contributor.author | Williams, Mark L. | - |
dc.contributor.author | Kong, Chidong | - |
dc.date.accessioned | 2023-12-22T01:16:46Z | - |
dc.date.available | 2023-12-22T01:16:46Z | - |
dc.date.created | 2014-12-19 | - |
dc.date.issued | 2015-05 | - |
dc.description.abstract | A new methodology has been developed recently to treat resonance self-shielding in systems for which the fuel compact region of a reactor lattice consists of small fuel grains dispersed in a graphite matrix. The theoretical development adopts equivalence theory in both micro- and macro-level heterogeneities to provide approximate analytical expressions for the shielded cross sections, which may be interpolated from a table of resonance integrals or Bondarenko factors using a modified background cross section as the interpolation parameter. This paper describes the first implementation of the theoretical equations in a reactor analysis code. To reduce discrepancies caused by use of the rational approximation for collision probabilities in the original derivation, a new formulation for a doubly heterogeneous Bell factor is developed in this paper to improve the accuracy of doubly heterogeneous expressions. The methodology is applied to a wide range of pin cell and assembly test problems with varying geometry parameters, material compositions, and temperatures, and the results are compared with continuous-energy Monte Carlo simulations to establish the accuracy and range of applicability of the new approach. It is shown that the new doubly heterogeneous self-shielding method including the Bell factor correction gives good agreement with reference Monte Carlo results. | - |
dc.identifier.bibliographicCitation | NUCLEAR SCIENCE AND ENGINEERING, v.180, no.1, pp.41 - 57 | - |
dc.identifier.doi | 10.13182/NSE14-72 | - |
dc.identifier.issn | 0029-5639 | - |
dc.identifier.scopusid | 2-s2.0-84931824844 | - |
dc.identifier.uri | https://scholarworks.unist.ac.kr/handle/201301/9523 | - |
dc.identifier.url | http://www.ans.org/pubs/journals/nse/a_37006 | - |
dc.identifier.wosid | 000353931800003 | - |
dc.language | 영어 | - |
dc.publisher | AMER NUCLEAR SOC | - |
dc.title | A New Equivalence theory Method for Treating Doubly Heterogeneous Fuel? II: Verifications | - |
dc.type | Article | - |
dc.description.isOpenAccess | FALSE | - |
dc.relation.journalWebOfScienceCategory | Nuclear Science & Technology | - |
dc.relation.journalResearchArea | Nuclear Science & Technology | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.subject.keywordPlus | CROSS-SECTION | - |
dc.subject.keywordPlus | DERIVATION | - |
dc.subject.keywordPlus | CODE | - |
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