Protection system for protecting a nuclear reactor in the event

Details Protection system for protecting a nuclear reactor in the event Protection system for protecting a nuclear reactor in the event

1989-01-27

1991-01-22

Walsh, Donald P.

Induced nuclear reactions: processes, systems, and elements

With control of reactor

By electronic signal processing circuitry

376254, 376259, 376277, G21C 736

Patent

active

049869523

ABSTRACT:
Protection against the consequences of a cluster of control rods falling accidentally is provided by four chains, each of which includes two neutron flux detectors (D1A, D1B), two primary treatment circuits (R1A, S1A and R1B, S1B) associated with said two detectors such that each provides a primary fall signal in the event of the flux measured by the corresponding detector decreasing rapidly, and an OR gate (P1) for providing an output fall signal from the chain in the event of at least one of said primary signals being present. The detectors (D1A, D4B, D3A, D1B, D2A, D3B, D4A and D2B) are angularly distributed around the vertical axis (A) of the core (2). A secondary treatment circuit (6) causes an emergency reactor stop to take place in the event that it receives fall signals at the outputs from at least two chains.

REFERENCES:
patent: 4548784 (1985-10-01), Watari
patent: 4752869 (1988-06-01), Miller
patent: 4762663 (1988-08-01), Cook
patent: 4832898 (1989-05-01), Miranda
patent: 4843537 (1989-06-01), Arita
IEEE Transactions on Nuclear Science (see attached Search Report).
Revue Generale Nucleaire (see attached Search Report).

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