Coupling of system thermal-hydraulics and monte-carlo method for a consistent thermal-hydraulics-reactor physics feedback

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The present paper describes the coupling of a three-dimensional continuous-energy Monte Carlo reactor physics code, Serpent, with thermal-hydraulics safety analysis code RELAP5. 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 paper, the coupled Serpent/RELAP5 code capability is demonstrated by the improved axial power distribution of UO2 and MOX single assembly models, based on the OECD-NEA/NRC PWR MOX-UO2 Core Transient Benchmark1. Comparisons of calculation results using the coupled code with those from the deterministic methods, specifically heterogeneous multi-group transport code DeCART, show that the coupling produces more precise results. In addition, a new convergence criterion based on the normalized axial power distribution is introduced, which is proved to be more direct, easier to apply and more rigorous than the temperature convergence used in previous research.

Original languageEnglish (US)
Title of host publicationInternational Congress on Advances in Nuclear Power Plants, ICAPP 2014
PublisherAmerican Nuclear Society
Pages1164-1174
Number of pages11
ISBN (Print)9781632668264
StatePublished - Jan 1 2014
EventInternational Congress on Advances in Nuclear Power Plants, ICAPP 2014 - Charlotte, NC, United States
Duration: Apr 6 2014Apr 9 2014

Publication series

NameInternational Congress on Advances in Nuclear Power Plants, ICAPP 2014
Volume2

Other

OtherInternational Congress on Advances in Nuclear Power Plants, ICAPP 2014
CountryUnited States
CityCharlotte, NC
Period4/6/144/9/14

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment

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  • Cite this

    Wu, X., & Kozlowski, T. (2014). Coupling of system thermal-hydraulics and monte-carlo method for a consistent thermal-hydraulics-reactor physics feedback. In International Congress on Advances in Nuclear Power Plants, ICAPP 2014 (pp. 1164-1174). (International Congress on Advances in Nuclear Power Plants, ICAPP 2014; Vol. 2). American Nuclear Society.