Induced nuclear reactions: processes – systems – and elements – Reactor protection or damage prevention – Shield or barrier between radiation or heat source and...
Patent
1992-10-19
1994-09-06
Walsh, Donald P.
Induced nuclear reactions: processes, systems, and elements
Reactor protection or damage prevention
Shield or barrier between radiation or heat source and...
376299, 376283, G21C 900
Patent
active
053454812
ABSTRACT:
A boiling-water reactor plant employs a baffle that parallels the interior surface of a thermally-conductive containment wall, defining an intermediate condensate channel. When the plant turbine becomes isolated from the boiling-water reactor, the reactor is shut down and steam is released from the reactor pressure vessel to the containment. Steam rises through an opening at the top of the baffle, allowing some of the steam to condense on the interior surface of the containment. Condensate then flows into the channel, which is dimensioned so that noncondensable gases are dragged into the channel along with the condensate. This minimizes thermal insulation due to the noncondensables and enhances the transfer of heat from the containment. Furthermore, the noncondensable gases are dragged at a sufficient velocity to induce turbulence. The resulting mixing of condensate flow layers further improves heat transfer to the containment wall.
REFERENCES:
patent: 3899391 (1975-08-01), Sulzer et al.
"Forced Convection Condensation in the Presence of Noncondensables and Interfacial Resistance," E. M. Sparrow, W. J. Minkowycz, and M. Saddy, Int. J. Heat Mass Transfer, vol. 10, pp. 1829-1845, Pergamon Press 1967.
"Heat Removal Tests if Isolation Condenser Applied as a Passive Containment Cooling System," H. Nagasaka, K. Yamada, M. Katoh, and S. Yokoburi.
"BWR Passive Containmetn Cooling System by Condensation-Driven Natural Circulaiton," K. N. Vierow, H. E. Townsend, J. R. Fitch, J. G. Munthe Andersen, M. Almagir, and V. E. Schrock.
Beulick J. S.
General Elecric Company
Voss Frederick A.
Walsh Donald P.
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