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KMID : 0371819980300020140
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Nuclear Engineering and Technology
1998 Volume.30 No. 2 p.140 ~ p.147
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Conceptual Study for the Moderator Selection of the Cold Neutron Source Facility for HANARO
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Cho, Young-Sik
Chang, Jonghwa/Choi, Chang-Oong
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Abstract
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Basic concept of a cold neutron source for a 30 MW heavy water moderated reactor (HANARO) is developed. The source is a cold bottle located in a vertical hole near the reactor core. Since the bottle does not have sufficient volume for cooling, the optimum liquid mixture ratio is studied between liquid hydrogen and liquid deuterium. We also studied the variation of the gain depending on the volume of the bottle. The calculation is performed by a coupled MCNP model and by a semi-analytic approach. For the current geometry, 80% liquid deuterium mixture with liquid hydrogen gives the highest gain at 10 Å neutron wave.
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