Apparatus and method for controlling a nuclear reactor

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364504, G21C 736

Patent

active

040802515

ABSTRACT:
A control system and method for a nuclear steam supply system for calculating the appropriate operating limits of the system based on the system's design limits. The control system monitors the appropriate parameters of the nuclear steam supply system, modifies one of the parameters, and calculates the desired operating limit on the basis of the unmodified and modified parameters. The parameter selected to be modified is adjusted in such a way as to account for the possible occurrence of all anticipated operational occurrences. The degree of adjustment encompasses the factors of the possibility of the occurrence of a worst case accident; axial power distribution; and the delay times of the protection system which include sensing, calculating, and activation time delays. The operating limit thus generated includes a margin which allows sufficient time for the termination of operation or for control of the system such that the design limits are not violated.

REFERENCES:
patent: 3114263 (1963-12-01), McCann
patent: 3202804 (1965-08-01), Schlein
patent: 3356577 (1967-12-01), Fishman
patent: 3423285 (1969-01-01), Curry et al.
patent: 3565760 (1971-02-01), Parkos et al.
patent: 3625815 (1971-12-01), Fishman
patent: 3656074 (1972-04-01), Bevilacqua et al.
L. S. Tong, "Prediction of Departure from Nucleate Boiling for an Axially Non-Uniform Heat Flux Distribution," Journal of Nuclear Energy, 1967, vol. 21, pp. 241-248.

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