Thermal hydraulic analysis of thorium fuel assemblies loaded with annular seed pins환형 시드 연료봉이 장착된 토륨 핵연료 집합체의 열수력 분석에 관한 연구

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Thermal hydraulic characteristics of thorium-based fuel assemblies loaded with annular seed pins have been analyzed using MATRA_A combined with MATRA, and compared with those of the existing thorium-based assemblies. MATRA and MATRA_A showed good agreements for the pressure drops at the internal subchannels. The pressure drop generally increased in the cases of the assemblies loaded with annular seed pins due to the larger wetted perimeter, but an exception existed. In the inner subchannels of the seed pins, mass fluxes were high due to the grid form losses in the outer subchannels. About 43% of the heat generated from the seed pin flowed into the inner subchannel and the rest into the outer subchannel, which implies the inner to outer wall heat flux ratio was approximately 1.2. When the relative annular seed pin power is higher, the inner to outer wall heat flux ratio and inner subchannel mass flux are lower. The maximum temperatures of the annular seed pins were slightly above 500℃. The MDNBRs of the assemblies loaded with annular seed pins were higher than those of the existing assemblies. Due to the fact that interchannel mixing cannot occur in the inner subchannels, temperatures and enthalpies were higher in the inner subchannels.
Advisors
Chang, Soon-Heungresearcher장순흥researcher
Description
한국과학기술원 : 원자력양자공학과,
Publisher
한국과학기술원
Issue Date
2002
Identifier
174279/325007 / 000983624
Language
eng
Description

학위논문(석사) - 한국과학기술원 : 원자력양자공학과, 2002.2, [ ix, 73 p. ]

Keywords

열수력; 집합체; 토륨; 연료봉; 환형; MATRA; annular; assemblies; thermal; thorium

URI
http://hdl.handle.net/10203/49447
Link
http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=174279&flag=dissertation
Appears in Collection
NE-Theses_Master(석사논문)
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