Incore instrumentation system for a pressurized water reactor

Details Incore instrumentation system for a pressurized water reactor Incore instrumentation system for a pressurized water reactor

1990-11-26

1992-01-07

Hunt, Brooks H.

Induced nuclear reactions: processes, systems, and elements

Testing, sensing, measuring, or detecting a fission reactor...

Flux monitoring

376245, G21C 1700

Patent

active

050789570

ABSTRACT:
A preferred embodiment of the present invention provides an incore instrumentation system for detecting conditions, e.g., neutron flux density, within the core of a pressurized water nuclear reactor (PWR). The instrumentation system includes a plurality of long straight thimbles (52), containing fixed incore detectors, which are inserted through the top closure head (18) of the PWR. The invention meets today's principal utility, EPRI, DOE and NRC requirements and preferences, including no bottom RV head penetrations and the use of fixed incore instrumentation. In addition, an instrumentation system according to the invention is mechanically simple with a straight core insertion/removal path that does not conflict with or add significant complexity to the reactor internals.

REFERENCES:
patent: 3827935 (1974-08-01), Gruner et al.
patent: 3853702 (1974-12-01), Bevilacqua et al.
patent: 3899390 (1975-08-01), Klein et al.
patent: 3976541 (1976-08-01), Stiteler et al.
patent: 4438649 (1984-03-01), Gilman
patent: 4765947 (1988-08-01), Babin et al.
patent: 4983351 (1991-01-01), Tower et al.
Nuclear Power Plant Systems and Equipment, Ch. 2, pp. 6-23, K. C. Lish, ISBNO-8311-1078-3.

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