Control system for a boiling-water nuclear power plant

Details Control system for a boiling-water nuclear power plant Control system for a boiling-water nuclear power plant

1976-04-28

1978-06-20

Engle, Samuel W.

176 56, G21C 732, G21C 1904

Patent

active

040960307

ABSTRACT:
A control system for a nuclear power plant which comprises a boiling-water reactor and a steam line including a control valve therein connecting the steam outlet from the reactor to a steam turbine includes a first controller of the "I-action" type responsive to the reactor pressure and a second controller of either the "P-action" or "PD-action" type responsive to the pressure in the steam line immediately in advance of the control valve. A summing device is provided for adding the output signals from the two controllers, and the output from the summing device is applied to the control valve for regulating its operation. For a system wherein a pair of steam lines each including a control valve therein are connected in parallel from the reactor steam outlet to the turbine, transducers are provided for measuring the respective pressures in the steam lines and a second summing device is connected to the outputs from the transducers for determining the mean value of the respective pressures in the steam lines. The output of the second summing device is then connected to the input of the second controller.

REFERENCES:
patent: 3128233 (1964-04-01), Kuerzel
patent: 3247069 (1966-04-01), Powell et al.
patent: 3253994 (1966-05-01), Kagi
patent: 3255084 (1966-06-01), Doroszlai
patent: 3341422 (1967-09-01), Gilbert
patent: 3356577 (1967-12-01), Fishman
patent: 3561406 (1971-02-01), Rupprecht

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