DC Field | Value | Language |
---|---|---|
dc.contributor.author | Jo, Yugwon | ko |
dc.contributor.author | Cho, Nam Zin | ko |
dc.date.accessioned | 2018-04-24T02:15:26Z | - |
dc.date.available | 2018-04-24T02:15:26Z | - |
dc.date.created | 2018-03-26 | - |
dc.date.created | 2018-03-26 | - |
dc.date.issued | 2018-03 | - |
dc.identifier.citation | NUCLEAR SCIENCE AND ENGINEERING, v.189, no.1, pp.26 - 40 | - |
dc.identifier.issn | 0029-5639 | - |
dc.identifier.uri | http://hdl.handle.net/10203/241089 | - |
dc.description.abstract | In the three-dimensional (3-D) continuous-energy whole-core reactor analysis, the partial current-based coarse mesh finite difference (p-CMFD) feedback was applied to the Monte Carlo (MC) k-eigenvalue problem simulation for both inactive and active iterations (cycles). To reduce the stochastic errors in the p-CMFD parameters and their biases due to the ratio-type estimators, the first-in-first-out (FIFO) accumulation scheme was introduced in the MC/p-CMFD procedure. The MC/p-CMFD procedure was tested on a typical pressurized water reactor 3-D continuous-energy whole-core problem while varying the FIFO queue lengths and the results were compared with the conventional power iteration. The Shannon entropy analysis showed that MC/p-CMFD accelerates the convergence of the fission source distributions and mitigates the spatial clustering phenomenon. The real variance analysis also showed that MC/p-CMFD reduces the interiteration correlation, leading to the most real variance reduction in the local MC tallies at the optimum queue length (L = 5). It was also shown that a nontrivial bias was introduced by the p-CMFD feedback, especially for the global tally (k(eff)) with L = 1. However, the bias decreased as the tally bin size became smaller and it was effectively reduced by increasing the queue length (L >= 5). In conclusion, the MC/p-CMFD procedure showed promising capability for 3-D continuous-energy whole-core reactor analysis by MC simulation. | - |
dc.language | English | - |
dc.publisher | TAYLOR & FRANCIS INC | - |
dc.subject | EIGENVALUE CALCULATIONS | - |
dc.subject | CONVERGENCE | - |
dc.subject | SIMULATION | - |
dc.subject | FISSION | - |
dc.subject | ENTROPY | - |
dc.subject | BIASES | - |
dc.subject | ERROR | - |
dc.title | Acceleration and Real Variance Reduction in Continuous-Energy Monte Carlo Whole-Core Calculation via p-CMFD Feedback | - |
dc.type | Article | - |
dc.identifier.wosid | 000426587700002 | - |
dc.identifier.scopusid | 2-s2.0-85036630037 | - |
dc.type.rims | ART | - |
dc.citation.volume | 189 | - |
dc.citation.issue | 1 | - |
dc.citation.beginningpage | 26 | - |
dc.citation.endingpage | 40 | - |
dc.citation.publicationname | NUCLEAR SCIENCE AND ENGINEERING | - |
dc.identifier.doi | 10.1080/00295639.2017.1373517 | - |
dc.contributor.localauthor | Cho, Nam Zin | - |
dc.description.isOpenAccess | N | - |
dc.type.journalArticle | Article | - |
dc.subject.keywordAuthor | Continuous-energy Monte Carlo simulation | - |
dc.subject.keywordAuthor | p-CMFD acceleration | - |
dc.subject.keywordAuthor | real variance reduction | - |
dc.subject.keywordPlus | EIGENVALUE CALCULATIONS | - |
dc.subject.keywordPlus | CONVERGENCE | - |
dc.subject.keywordPlus | SIMULATION | - |
dc.subject.keywordPlus | FISSION | - |
dc.subject.keywordPlus | ENTROPY | - |
dc.subject.keywordPlus | BIASES | - |
dc.subject.keywordPlus | ERROR | - |
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.