Expeimental investigation of thermal margin in tight-lattice rod bundle; Large-scale thermal-hydraulic experiments under high pressure conditions

Tamai, Hidesada

An Innovative Water Reactor for Flexible Fuel Cycle (FLWR) core has a tight-lattice bundle structure and it is operated under low mass velocity and high void fraction conditions, for aiming at the achievement of a high conversion ratio of plutonium mixed oxide (MOX) fuel. These conditions make core cooling difficult, and the FLWR thermal-hydraulic characteristics under such conditions are not known well. The confirmation of thermal-hydraulic characteristics is, therefore, one of the most important R&D requirements for the FLWR design. We investigated the thermal-hydraulic performance of the FLWR core using a test section with 37-rod bundles under high pressure conditions simulating the FLWR operating conditions. The result obtains that the FLWR has sufficient thermal margins for cooling of the core.

Language	:	Japanese
Journal	:	Nihon Genshiryoku Gakkai-Shi ATOMO
Volume	:	49
Number	:	11-12
Pages	:	p.745 - 749
Publication Year/Month	:	2007/12
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Paper URL	:	http://ci.nii.ac.jp/naid/10019655224
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Keywords	:	no keyword
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Cooperating Institute	:	文部科学省

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Registration No. : AA20070751
JAEA Abstracts No. : 36000222
Paper Submission No. : 3554

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