Method for operating a nuclear reactor with scrammable part leng

Details Method for operating a nuclear reactor with scrammable part leng Method for operating a nuclear reactor with scrammable part leng

1977-01-10

1979-10-02

Behrend, Harvey E.

176 36R, G21C 708

Patent

active

041697596

ABSTRACT:
A new part length rod is provided which may be used to not only control xenon induced power oscillations but also to contribute to shutdown reactivity when a rapid shutdown of the reactor is required. The part length rod consists of a control rod with three regions. The lower control region is a longer weaker active portion separated from an upper stronger shorter poison section by an intermediate section which is a relative non-absorber of neutrons. The combination of the longer weaker control section with the upper high worth poison section permits the part length rod of this invention to be scrammed into the core. When a reactor shutdown is required but also permits the control rod to be used as a tool to control power distribution in both the axial and radial directions during normal operation.

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Schultz, "Control of Nuclear Reactors and Power Plants", 1955, pp. 98-101, 113.

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