Method and device for operating a reactor in an unstable state

Induced nuclear reactions: processes – systems – and elements – With control of reactor – By electronic signal processing circuitry

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

376215, 376254, 376259, G21C 736, G21C 1700, G21C 17108

Patent

active

061223395

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.
International Publication No. WO 93/07623 (Banda), dated Apr. 15, 1993.
Patent Abstracts of Japan No. JP 60-94882 (Tomoaki), dated Apr. 8, 1994.
Patent Abstracts of Japan No. JP 62-075295 A (Jigyo), dated Apr. 7, 1987.
Patent Abstracts of Japan No. JP 60-159691 A, dated Aug. 21, 1985.
Patent Abstracts of Japan No. JP 59-196499 A, dated Nov. 7, 1984.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Method and device for operating a reactor in an unstable state does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method and device for operating a reactor in an unstable state, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and device for operating a reactor in an unstable state will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-1081136

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.