Core reactivity validation computer and method

Details Core reactivity validation computer and method Core reactivity validation computer and method

1988-01-19

1989-10-31

Walsh, Donald P.

Induced nuclear reactions: processes, systems, and elements

With control of reactor

By electronic signal processing circuitry

364554, G21C 736

Patent

active

048775754

ABSTRACT:
A smart reactivity computer is disclosed that processes signals from multiple neutron detectors to generate values of regional core reactivity that are output to a strip chart recorder. The computer compares the regional reactivity values and, when the values are coincident for a period sufficient to satisfy a statistical fit test to a straight line, indicates to the operator that true core reactivity can be determined. The computer determines control rod worth by first fitting a straight line to the coincident portion of the reactivity values. The computer then determines intersections between the straight line and the reactivity value lines produced when the control rods are moved on both ends of the straight line. The difference between intersections for a single control rod movement line determines control rod worth for that movement.

REFERENCES:
patent: 4637910 (1987-01-01), Impink
patent: 4717528 (1988-01-01), Meyer
A. F. Henry, "The Application of Reactor Kinetics to the Analysis of Experiments", Nuclear Science and Engineering: 3, 52-70 (1958).
Westinghouse, "Digital Reactivity Computer", (Westinghouse Brochure).
Cesar A. Sastre, "The Measurement of Reactivity", Nuclear Science and Engineering: 8, 443-447 (1960).
J. Moreira and J. C. Lee, "Space-Time Analysis of Reactor-Control Rod-Worth Measurements", Nuclear Science and Engineering: 86, 91-105 (1984).
J. Moreira and J. C. Lee, "Accuracy of the Modal-Local Method for Reactivity Determination".

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