Nuclear reactor core construction

Details Nuclear reactor core construction Nuclear reactor core construction

1980-06-11

1983-03-29

Walsh, Donald P.

Induced nuclear reactions: processes, systems, and elements

Fuel component structure

Plural fuel segments or elements

376212, 376419, 376428, 376447, 376449, G21C 332

Patent

active

043783295

ABSTRACT:
A core construction for a nuclear reactor having a multiplicity of fuel cells forming a core in which each fuel cell includes four fuel assemblies arranged in adjacent relationship and one control rod insertable into a position surrounded by the four fuel assemblies. The fuel cells includes first fuel cells each having a relatively high cell mean infinite neutron multiplication factor and including one fuel assembly containing a burnable poison, and second fuel cells each having a relatively low cell mean infinite neutron multiplication factor and including no fuel assembly containing a burnable poison. The first fuel cells are arranged both in a central zone of the core disposed within about one-half the core radius from the center of the core and in a circumferential zone of the core outside the central zone. The second fuel cells are arranged only in the central zone and no second fuel cells are arranged in the circumferential zone. Only the second fuel cells provide control cells in which the control rods are operative to adjust core reactivity changes and power distribution changes during normal power operation of the reactor.

REFERENCES:
patent: 3141827 (1964-07-01), Iskenderian
patent: 3844886 (1974-10-01), Crowther
patent: 4251321 (1981-02-01), Crowther
Specker et al., "The BWR Control Cell Core Improved Design"; Trans. Am. Nucl. Soc. 30 (1978), pp. 336-338.
Piascik et al., "BWR Operating Experience at Millstone I w/Cont. Cell Improved Design"; Trans. Am. Nucl. Soc. 32 (1979), p. 706.

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