Induced nuclear reactions: processes – systems – and elements – With control of reactor – By movement of control element or by release of neutron...
Patent
1993-11-17
1996-06-04
Walsh, Donald P.
Induced nuclear reactions: processes, systems, and elements
With control of reactor
By movement of control element or by release of neutron...
376371, 376352, 376216, 376210, 376439, G21C 706
Patent
active
055241280
ABSTRACT:
A control system for avoiding coupled neutronic-thermal hydraulic instabilities during maneuvering of a boiling water nuclear reactor that determines the average elevation in the reactor core of the coolant boiling boundary, and avoids instabilities by maintaining the core average coolant boiling boundary elevation above a target value, which is dependent on reactor design specifics but may be about four feet, in core power-flow operating regions which are subject to instabilities. The system may be implemented without physical modification of existing reactors or reactor instrumentation and control systems through use of the reactor core monitoring computer, which typically has available all core parameters necessary for the computations required in the invention. In a preferred embodiment, the control system is implemented by calculating the ratio of core power generated below the target elevation to the core power required for coolant saturation, and controlling the reactor so that the ratio is less than one.
REFERENCES:
patent: 3565760 (1971-02-01), Parkos et al.
patent: 3998693 (1976-12-01), Musick
patent: 4009614 (1977-03-01), Sheppard et al.
patent: 4400343 (1983-08-01), Izumi et al.
patent: 4605530 (1986-08-01), Tatemichi
patent: 4879087 (1989-11-01), Akiyama et al.
patent: 4912732 (1990-03-01), Singh
patent: 4947485 (1990-08-01), Oosterkamp
patent: 5112570 (1992-05-01), Dix et al.
patent: 5158738 (1992-10-01), Trouble et al.
patent: 5171516 (1992-12-01), Iwamoto
patent: 5174946 (1992-12-01), Watford et al.
patent: 5229068 (1993-07-01), Johansson
patent: 5271044 (1993-12-01), Hidaka et al.
Mowry Christofer N.
Nir Israel
Chelliah Meena
Entergy Operations, Inc.
PECO Energy Company
Podwil Robert C.
Walsh Donald P.
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