Induced nuclear reactions: processes – systems – and elements – Reactor protection or damage prevention – Pressure suppression and relief
Patent
1994-08-31
1996-05-14
Wasil, Daniel D.
Induced nuclear reactions: processes, systems, and elements
Reactor protection or damage prevention
Pressure suppression and relief
376283, 137 72, G21C 9004
Patent
active
055175384
ABSTRACT:
A nuclear reactor has a pressure vessel with an interior, a coolant conducting surface, such as a wall of the pressure vessel or a line passing through the wall of the pressure vessel, a pressure relief line, and a core. A safety device which protects the pressure vessel against overpressure failure upon inadequate cooling of the core includes a pressure relief valve being pressure-tightly inserted into the coolant conducting surface and having a seat, a closure element normally disposed on the seat for blocking a flow from the interior of the pressure vessel to the pressure relief line, an abutment, and a valve closing spring holding the closure element and being supported against the abutment. A force transmission element holds the abutment and has an end facing away from the abutment. A detent is disposed in the pressure vessel and fixes the end of the force transmission element. The detent is releasable in dependence on a given threshold temperature, for example 700.degree. C., for freeing the abutment and lifting the closure element off the seat as a result of a pressure differential.
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Nuclear Engineering International, (OLIVON) May 1984 pp. 40-43 "Improving French PWR overpressure protection with Sebim valves".
Hau Gerhard
Hollmann Josef
Seidelberger Hartmut
Stockhausen Horst-Dieter
Greenberg Laurence A.
Lerner Herbert L.
Siemens Aktiengesellschaft
Wasil Daniel D.
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