Induced nuclear reactions: processes – systems – and elements – Fuel component structure – Plural fuel segments or elements
Patent
1984-07-30
1987-08-25
Kyle, Deborah L.
Induced nuclear reactions: processes, systems, and elements
Fuel component structure
Plural fuel segments or elements
376349, G21C 332, G21C 700
Patent
active
046891951
ABSTRACT:
In a nuclear reactor, gaps are defined between fuel assemblies so that moderators can be inserted. Hence, the nuclear characteristics vary between the central portion and periphery of the fuel assembly so that the local output peaking becomes greater on the periphery of the fuel assembly. The present invention flattens the local output peaking by providing that the quantity of a nuclear fuel material per fuel rod loaded in the fuel rods on the periphery of the fuel assembly is smaller than the quantity of the fuel material per fuel rod loaded in the fuel rods at the central portion of the fuel assembly. Any one of the following three constructions can be used:
REFERENCES:
patent: 3928128 (1975-12-01), Kollmar et al.
patent: 4059484 (1977-11-01), Bupp et al.
patent: 4229258 (1980-10-01), Takeda et al.
patent: 4324615 (1982-04-01), Kobayashi et al.
patent: 4483818 (1984-11-01), Yamashita et al.
"Fundamental Aspects of Nuclear Reactor Fuel Elements", 1976, p. 114, Olander.
"Mark's Standard Handbook for Mechanical Engineers", 1969, pp. 9-124, Baumeister et al.
Aoyama Motoo
Kurihara Kunitoshi
Hitachi , Ltd.
Kyle Deborah L.
Wasil Daniel
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