Induced nuclear reactions: processes – systems – and elements – With control of reactor – By electronic signal processing circuitry
Patent
1997-07-09
1999-02-23
Wasil, Daniel D.
Induced nuclear reactions: processes, systems, and elements
With control of reactor
By electronic signal processing circuitry
376254, G21D 308
Patent
active
058752218
ABSTRACT:
A transiently unstable state of a boiling-water reactor is damped by measuring the oscillating neutron flux and, after a first threshold value is exceeded over a plurality of oscillation periods, the rate of increase of the oscillation is determined. Depending on the slope of the increase, and after a further threshold value (in particular one dependent on the rate of increase) for the oscillating flux is exceeded, a selection is made which one of various stabilization strategies for damping the oscillation should be triggered before a SCRAM becomes necessary. A hierarchy of stabilization strategies is available: blocking a power increase, for instance, in the control system, controlled slow reduction of the power, or rapid power reduction by a "partial SCRAM". The monitoring of the unstable state is effected with a system of sensors strategically distributed throughout the core and which redundantly measure the flux in one region of the core. The sensors act on a plurality of redundantly operating systems, and the signal from each sensor is effective in only one of the redundant systems.
REFERENCES:
patent: 5174946 (1992-12-01), Watford et al.
patent: 5225149 (1993-07-01), Banda
patent: 5406598 (1995-04-01), Takeuchi et al.
Japanese Patent Abstract No. 6/094882 (Tomoaki), dated Apr. 8, 1994.
Japanese Patent Abstract No. 62/075295 (Jigyo), dated Apr. 7, 1987.
Japanese Patent Abstract No. 60/159691, dated Aug. 21, 1985.
Japanese Patent Abstract No. 59/196499, dated Nov. 7, 1984.
Kreuter Dieter
Rauch Godehard
Schulze Joachim
Greenbrg Laurence A.
Lerner Herbert L.
Siemens Aktiengesellschaft
Wasil Daniel D.
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