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Monte Carlo Perturbation Analysis of Isothermal Temperature Reactivity Coefficient in Light-Water Moderated Critical Assembly : 몬테칼로 섭동법을 사용한 경수 감속 임계 집합체의 등온 반응도 계수 분석
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- Authors
- Advisor
- 심형진
- Major
- 공과대학 에너지시스템공학부
- Issue Date
- 2014-08
- Publisher
- 서울대학교 대학원
- Keywords
- Isothermal Temperature Reactivity Coefficient ; Kyoto University Critical Assembly ; Monte Carlo Perturbation ; McCARD
- Description
- 학위논문 (석사)-- 서울대학교 대학원 : 에너지시스템공학부, 2014. 8. 심형진.
- Abstract
- The isothermal temperature reactivity coefficient (ITRC) of the light water-moderated core with or without the D2O tank in the Kyoto University Critical Assembly are analyzed by the Monte Carlo (MC) neutron transport analysis code, McCARD. Through the temperature changes of H2O and D2O, the effects of the coolant density changes in the moderator and reflector regions, and the microscopic cross section variations on ITRC are investigated by the sensitivity analyses by the MC adjoint-weighted perturbation method. Also, to obtain ITRC contributions of hydrogen and deuterium cross sections in thermal neutron energy region, a new perturbation technique for the thermal scattering library is presented. From results of MC perturbation analyses with help of the new technique, the ITRCs of the two core configurations are accurately estimated by competitions between a negative contribution of number density change of hydrogen in the moderator region and a positive contribution of the thermal scattering cross section change of hydrogen in the reflector region.
- Language
- English
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