Induced nuclear reactions: processes – systems – and elements – With control of reactor – By electronic signal processing circuitry
Patent
1987-04-08
1988-09-13
Walsh, Donald P.
Induced nuclear reactions: processes, systems, and elements
With control of reactor
By electronic signal processing circuitry
376217, 364149, 364166, 364138, 364556, G21C 700
Patent
active
047708433
ABSTRACT:
A method and apparatus for controlling the stability of a boiling water reactor using a digital computer to calculate on-line, from distributed steady state values of only power, flow, enthalpy and pressure; a stability index for selected fuel assemblies taking into account nuclear feedback as well as detailed hydrodynamic effects. Such calculations are only made for fuel assemblies selected as most susceptible to instability on the basis of the level and axial distribution of power generated. If the least stable fuel assembly is unstable, its stability index is iteratively recalculated using assumed incremental changes in either flow or control rod position until a stable condition is indicated. The cumulative adjustment in flow or rod position required for stability is reported to the operator and can be implemented manually or by an automatic control system.
REFERENCES:
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patent: 4319959 (1982-03-01), Monta
patent: 4330367 (1982-05-01), Musick
patent: 4333797 (1982-06-01), Nishizawa
patent: 4637910 (1987-01-01), Impink
Taleyarkhan, et al.,; Nuc. Eng. & Design 93 (1986) 39-50, "A Stability Analysis of Ventilated Boiling Channels".
Walsh Donald P.
Westinghouse Electric Corp.
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