Abstracts and Available Papers Presented at the
2002 International RERTR Meeting

PERFORMANCE UNCERTAINTIES OF LEU Mo-99 TARGETS FOR HANARO

Dong-Keun Cho, Myung-Hyun Kim
Kyung Hee University
Yongin-si, Gyeonggi-do, 449-701, KOREA
(82)+31-201-2562, [email protected], [email protected],

Byung-Chul Lee
Korea Atomic Energy Research Institute
P.O. Box 105
Yusung, Taejon, 305-353, Korea

ABSTRACT

The use of low enriched uranium (LEU) fuel target was examined on the feasibility of ⁹⁹Mo production in a research reactor, HANARO. Uncertainty analysis was done with respect to ⁹⁹Mo yield ratio, ²³⁹Pu yield ratio, annual production rate, and decontamination requirement. An equilibrium core model for MCNP fixed-source problem was found by reactor design methodology, WIMS/VENTURE. Target design option with LEU was proposed. Variables related to target fabrication process and reactor physics condition was considered as uncertainty-inducing parameters. The most important factor affecting the overall uncertainty in LEU option was engineering tolerance in fabrication process of fuel film. It is acceptable to use LEU as a target fuel in view of radioactive purity of alpha emitter because the uncertainty in impurity level of ²³⁹Pu is expected to be relatively small, only 6% in 95% confidence level.

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