Self-actuating and locking control for nuclear reactor
- Chatsworth, CA
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.
- Research Organization:
- Atomics International Div., Canoga Park, CA (USA)
- DOE Contract Number:
- EY-76-C-03-0824
- Assignee:
- Rockwell International Corporation (El Segundo, CA)
- Patent Number(s):
- US 4313794
- OSTI ID:
- 864121
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
locking
control
nuclear
reactor
self-locking
flow
cutoff
valve
particularly
suited
type
utilizes
plurality
fluid
support
neutron
absorber
elements
provide
safe
shutdown
comprises
substantially
vertical
elongated
housing
aperture
plate
located
therethrough
nozzle
affixed
bottom
receiving
apertures
adjacent
top
discharging
sealing
means
below
walls
surrounding
sleeve
upper
moveable
position
unobstructed
closed
surfaces
mated
obstructed
particular
feature
utilizing
increase
pressure
maintain
provided
automatically
closing
whenever
drops
predetermined
level
substantially vertical
aperture plate
valve comprises
sealing means
neutron absorber
particularly suited
nuclear reactor
closed position
fluid pressure
predetermined level
sealing surface
sealing surfaces
vertical elongated
drops below
nozzle seal
fluid therethrough
absorber element
apertures adjacent
automatically closing
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