Apparatus and method for closed-loop control of reactor power

Details Apparatus and method for closed-loop control of reactor power Apparatus and method for closed-loop control of reactor power

1986-09-12

1987-12-01

Walsh, Donald P.

Induced nuclear reactions: processes, systems, and elements

With control of reactor

By electronic signal processing circuitry

376217, 376236, G21C 736

Patent

active

047103418

ABSTRACT:
Closed-loop controller for altering the power level of nuclear reactors in a safe manner and without overshoot. Apparatus is provided for moving a control element such as a control rod or for adjusting the concentration of a soluble neutron absorber (chemical shim) for altering the nuclear reactor power level. A computer computes at short time intervals the two functions [.rho.(t)-.vertline..rho..sub.c .vertline./.lambda..sub.e '(t)]/.vertline..rho..sub.c .vertline. and .tau.(t)ln(P.sub.F /P(t)). The direction of motion of the control element is altered when these two functions become equal thereby resulting in the attainment of a new power level without overshoot. In a preferred embodiment, these two functions are computed at intervals of approximately one second.

REFERENCES:
patent: 4318778 (1982-03-01), Musick
patent: 4400343 (1983-08-01), Izumi et al.
patent: 4459259 (1984-07-01), Colley
patent: 4637911 (1987-01-01), Bernard

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