Induced nuclear reactions: processes – systems – and elements – Testing – sensing – measuring – or detecting a fission reactor...
Patent
1989-06-08
1991-01-08
Walsh, Donald P.
Induced nuclear reactions: processes, systems, and elements
Testing, sensing, measuring, or detecting a fission reactor...
376219, 376258, G21C 1700
Patent
active
049833502
ABSTRACT:
The present invention seeks to obtain reliable detection of the fall of a control cluster into the core of a pressurized water nuclear reactor without giving rise to the risk of an erroneous detection causing an untimely emergency reactor stop. Four acquisition units (U1, U2, U3, U4) corresponding to the four quadrants of the reactor core receive neutron flux signals (F1), heat flux signals (P1), and cluster position signals (Z1A, Z1B, . . . ) from the various quadrants and process them to generate corresponding alarm signals. These units, together with a combination circuit (14, 18, 22), provide a cluster fall signal (24) in the presence of at least two alarm signals including at least one cluster position alarm signal. The invention is applicable to electricity power generation.
REFERENCES:
patent: 4016034 (1977-04-01), Musick
patent: 4066497 (1978-01-01), Sato
patent: 4623507 (1986-11-01), Gravelle
patent: 4842805 (1989-06-01), Bourin
Vol. 9, No. 246 (P-393) (1969), Oct. 3, 1985-Patent Abstract of Japan.
Chelliah Meena
Framatome
Walsh Donald P.
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