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Kozlowski, Tomasz Wu, Xu 2013-08-22T16:47:26Z 2013-08-22T16:47:26Z 2015-08-22T10:00:50Z 2013-08 2013-08-22T16:47:26Z 2013-08 The present thesis describes the coupling of a three-dimensional continuous-energy Monte Carlo reactor physics code, Serpent, with thermal-hydraulics safety analysis code RELAP5-3D. Thermal-hydraulics and reactor physics coupling is commonly used in deterministic methods, for example RELAP5/PARCS and TRACE/PARCS. It has been well-validated for a number of steady and transient problems. The coupling of Monte-Carlo and reactor thermal-hydraulics will significantly improve the MC predictive capability and its applicability to a wide range of reactor problems of practical interest, as right now it is limited to fixed-feedback conditions. In this thesis, the coupled Serpent/RELAP5-3D code capability is demonstrated by the improved axial power distribution of single assemblies, achieved by a consistent thermal-hydraulics feedback. The code coupling is demonstrated for the UO2 and MOX single assemblies based on the OECD-NEA/NRC PWR MOX-UO2 Core Transient Benchmark [1]. Comparisons of calculation results using the coupled code with those from the individual codes in stand-alone mode, also with deterministic methods, specifically heterogeneous multi-group transport code DeCART, show that the coupling produces more precise results. Item withdrawn by Mark Zulauf (zulauf@illinois.edu) on 2013-07-18T17:27:27Z Item was in collections: University of Illinois Theses & Dissertations (ID: 1) No. of bitstreams: 2 WU_XU.docx: 1464142 bytes, checksum: ceef3fa35fd20d69435f399eacfd9520 (MD5) WU_XU.pdf: 1257150 bytes, checksum: ca805fff11ca181f0856cc57e6c7a913 (MD5) Made available in DSpace on 2013-08-22T16:47:26Z (GMT). No. of bitstreams: 3 Xu_Wu.pdf: 1257150 bytes, checksum: ca805fff11ca181f0856cc57e6c7a913 (MD5) WU_XU.docx: 1464142 bytes, checksum: ceef3fa35fd20d69435f399eacfd9520 (MD5) license.txt: 4052 bytes, checksum: 7d9c5e4681178293550d5773735f3d4b (MD5) Item marked as restricted to the 'UIUC Users [automated]' Group (id=2) by Seth Robbins (srobbins@illinois.edu) on 2013-08-22T16:49:33Z Item is restricted until 2015-08-22T16:49:27Z Restriction data tranferred 2014-07-01T11:20:47-05:00 Original Data Group with Access UIUC Users [automated] Release Date: 2015-08-22 11:49:27 UTC Reason: Author requested U of Illinois access only (OA after 2yrs) in Vireo ETD system U of I Only Restriction Lifted for Item 45532 on 2015-08-22T10:00:50Z. http://hdl.handle.net/2142/45550 en Copyright 2013 Xu Wu Monte Carlo Thermal-hydraulics Neutronics Code coupling Coupling of system thermal-hydraulics and Monte-Carlo method for a consistent thermal-hydraulics-reactor physics feedback text Nuclear, Plasma, & Rad Engr 1973 Nuclear, Plasma, Radiolgc Engr 5183 University of Illinois at Urbana-Champaign Thesis M.S. PHD: Nucl, Plasma,Rad Eng-UIUC 10KS5183PHD