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Reduced Enrichment for Research and Test Reactors
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Abstracts and Available Papers Presented at the
2002 International RERTR Meeting

A STUDY OF HANARO CORE CONVERSION USING HIGH DENSITY U-Mo FUEL

K.H. LEE, C.S. LEE, B.C. LEE, S.J.PARK and H. KIM

Research Reactor Analysis Department
Korea Atomic Energy Research Institute, 150 Deokjin-dong Yuseong, Daejeon, 305-353 Korea

and

C.K. KIM

Advanced Nuclear Fuel Technology Development Division
Korea Atomic Energy Research Institute, 150 Deokjin-dong Yuseong, Daejeon, 305-353 Korea

ABSTRACT

Currently, HANARO is using 3.15gU/cc U3Si/Al as a driver fuel. HANARO has seven vertical irradiation holes in the core region. Three of them including a central trap are located in the inner region of the core and mainly being used for material irradiation tests. Four of them are located in the reflector tank but cooled by primary coolant. They are used for fuel irradiation tests or radioisotope development tests. For minimum core modification using high density U-Mo fuels, no dimension change is assumed in the current fuel rods and the cladding thickness remains the same in this study. The high density U-Mo fuel will have up to about twice the linear uranium loading of a current HANARO driver fuel. Using this high density fuel 8 fuel sites can be replaced with irradiation sites. Three kinds of conceptual cores are considered using 5 gU/cc U-7Mo/Al and 16 gU/cc U-7Mo. The increase of the linear heat generation rate due to the decrease of total fuel length can be overcome by more uniform radial and axial power distribution using different uranium densities and different fuel meat diameters are introduced into those cores. The new core has 4.54 times larger surface-to-volume ratio than the reference core. The core uranium loading, linear heat generation rate, excess reactivity, and control rod worth as well as the neutron spectra are analysed for each core.


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Contact:
Dr. Kye Hong Lee

Senior Researcher, HANARO
Korea Atomic Energy Research Institute
P.O. Box 105, Yuseong
Daejeon, 305-600 Korea
Phone: (82 42) 868 8489
Fax: (82 42) 868 8341
E-mail: khlee@kaeri.re.kr

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Last modified on July 29, 2008 11:32 +0200