Induced nuclear reactions: processes – systems – and elements – Reactor protection or damage prevention – Auxiliary heat removal structure
Patent
1985-05-31
1987-10-13
Kyle, Deborah L.
Induced nuclear reactions: processes, systems, and elements
Reactor protection or damage prevention
Auxiliary heat removal structure
376281, 376407, 417 76, 417 87, 417173, G21C 1518, G21C 1524
Patent
active
046997547
ABSTRACT:
The invention does away with the necessity of moving parts such as a check valve in a nuclear reactor cooling system. Instead, a jet pump, in combination with a TEMP, is employed to assure safe cooling of a nuclear reactor after shutdown. A main flow exists for a reactor coolant. A point of withdrawal is provided for a secondary flow. A TEMP, responsive to the heat from said coolant in the secondary flow path, automatically pumps said withdrawn coolant to a higher pressure and thus higher velocity compared to the main flow. The high velocity coolant is applied as a driver flow for the jet pump which has a main flow chamber located in the main flow circulation pump. Upon nuclear shutdown and loss of power for the main reactor pumping system, the TEMP/jet pump combination continues to boost the coolant flow in the direction it is already circulating. During the decay time for the nuclear reactor, the jet pump keeps running until the coolant temperature drops to a lower and safe temperature where the heat is no longer a problem. At this lower temperature, the TEMP/jet pump combination ceases its circulation boosting operation. When the nuclear reactor is restarted and the coolant again exceeds the lower temperature setting, the TEMP/jet pump automatically resumes operation. The TEMP/jet pump combination is thus automatic, self-regulating and provides an emergency pumping system free of moving parts.
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Jones Thomas H.
Kyle Deborah L.
Manning John R.
McCaul Paul F.
The United States of America as represented by the administrator
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