Fuel Assembly and Core of Nuclear Reactor

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United States of America Patent

APP PUB NO 20140064433A1
SERIAL NO

14013095

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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In a fuel assembly having fuel rods U1 to U4, and P1 not containing gadolinia, and fuel rods G1-G3 containing gadolinia, the concentrations a of gadolinia in nuclear fuel materials A (8 wt % and 10 wt %) satisfy 0.7max≦1.0, the concentrations b of gadolinia in nuclear fuel materials B (5 wt % and 6 wt %) satisfy 0.4max≦0.7, the concentration c of gadolinia in a nuclear fuel material C (2 wt %) satisfies 0max≦0.4, and L(A)/5.0≧L(B) and L(B)/5.0≧L(C) are satisfied. The gadolinia with concentrations a burns out during the end of cycle, the gadolinia with concentrations b during the middle of cycle, and the gadolinia with a concentration c during the beginning of cycle. L(A) is the total axial length of zones filled with the nuclear fuel materials A in the fuel rods G1-G3, L(B) for materials B in G2 and G3, and L(C) material C in G1.

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Patent Owner(s)

Patent OwnerAddress
HITACHI-GE NUCLEAR ENERGY LTD1-1 SAIWAI-CHO 3-CHOME HITACHI-SHI IBARAKI 317-0073

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Ikegawa, Tomohiko Tokyo, JP 11 24
Mitsuyasu, Takeshi Tokyo, JP 18 9
Nakadozono, Naoyuki Tokyo, JP 2 2

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