Induced nuclear reactions: processes – systems – and elements – Reactor protection or damage prevention – Auxiliary heat removal structure
Patent
1992-02-28
1993-04-13
Wasil, Daniel D.
Induced nuclear reactions: processes, systems, and elements
Reactor protection or damage prevention
Auxiliary heat removal structure
G21C 1518
Patent
active
052020835
ABSTRACT:
A nuclear reactor system including a heat transport path around which a coolant is pumped by main circulation pumps to transport heat from the reactor core to a steam generator. A further decay heat removal path is connected in parallel with the steam generator and main pumps and has a heat exchange component located at an elevation such that a natural convection flow will occur in the decay heat removal path when the main pumps are shutdown. Means are provided to mainain a small flow in the decay heat removal path during normal operation of the main pump. That small flow is in the intended direction of the natural convection circulation flow and maintains a temperature difference within the decay heat removal path that provides a buoyancy force to immediately start a natural circulation flow if the main pumps are shutdown. The main pumps are to be shutdown, as is the reactor, on loss of the steam generator as a heat sink. Then the natural convection flow in the decay heat removal path ensures that the heat exchange component is immediately available as an alternate heat sink. The small flow, during operation, can be provided by an additional pump in the decay heat removal path or by bleeding a small flow from an appropriate position in this path.
REFERENCES:
patent: 4051892 (1977-10-01), Reinsch
patent: 4187147 (1980-02-01), Braun et al.
patent: 4312703 (1982-01-01), Woudstra
patent: 4360496 (1982-11-01), Marker et al.
patent: 4382908 (1983-05-01), Petersen
patent: 4486383 (1984-04-01), Esayan et al.
patent: 4689194 (1987-08-01), Wachholz et al.
patent: 4699754 (1987-10-01), French
patent: 4753771 (1988-06-01), Conway et al.
Kare Hannerz, "Applying Pius to Power Generation: the Secure-P LWR", Nuclear Engineering International, 28, 349, Dec. 1983.
A. Natalizio et al. "Passive Safety Features for Next Generation Candu Power Plants", IAEA Workshop, Chicago, Aug. 1989.
S. N. Tower et al. "Passive and Simplified System Features for the Advanced Westinghouse 600 MWe PWR", Nuclear Engineering and Design, 109 (1988), pp. 147-154.
Shill Ronald H.
Spinks Norman J.
Atomic Energy of Canada Limited
Wasil Daniel D.
LandOfFree
Passive shutdown cooling system for nuclear reactors does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Passive shutdown cooling system for nuclear reactors, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Passive shutdown cooling system for nuclear reactors will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1153611