Induced nuclear reactions: processes – systems – and elements – Reactor structures – Orifice or fluid control at inlet or outlet of coolant channels
Patent
1979-02-15
1982-02-02
Engle, Samuel W.
Induced nuclear reactions: processes, systems, and elements
Reactor structures
Orifice or fluid control at inlet or outlet of coolant channels
137457, 251 65, 376210, 376336, G21C 706
Patent
active
043137946
ABSTRACT:
A self-actuating, self-locking flow cutoff valve particularly suited for use in a nuclear reactor of the type which utilizes a plurality of fluid support neutron absorber elements to provide for the safe shutdown of the reactor. The valve comprises a substantially vertical elongated housing and an aperture plate located in the housing for the flow of fluid therethrough, a substantially vertical elongated nozzle member located in the housing and affixed to the housing with an opening in the bottom for receiving fluid and apertures adjacent a top end for discharging fluid. The nozzle further includes two sealing means, one located above and the other below the apertures. Also located in the housing and having walls surrounding the nozzle is a flow cutoff sleeve having a fluid opening adjacent an upper end of the sleeve, the sleeve being moveable between an upper open position wherein the nozzle apertures are substantially unobstructed and a closed position wherein the sleeve and nozzle sealing surfaces are mated such that the flow of fluid through the apertures is obstructed. It is a particular feature of the present invention that the valve further includes a means for utilizing any increase in fluid pressure to maintain the cutoff sleeve in a closed position. It is another feature of the invention that there is provided a means for automatically closing the valve whenever the flow of fluid drops below a predetermined level.
REFERENCES:
patent: 2299155 (1942-10-01), Lange
patent: 2303702 (1942-12-01), Mantz
patent: 3093155 (1963-06-01), Dawes
patent: 3147188 (1964-09-01), Campbell
patent: 3228847 (1966-01-01), Parkinson
patent: 3257286 (1966-06-01), Ryon
patent: 3347747 (1967-10-01), West
patent: 3805826 (1974-04-01), Westerhoff
patent: 4076583 (1978-02-01), Ash
De Larvin Clark E.
Engle Samuel W.
Kolin Henry
Miles Edward F.
Rockwell International Corporation
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