Bottom head to shell junction assembly for a boiling water nuclear reactor
Patent
·
OSTI ID:871388
- San Jose, CA
A bottom head to shell junction assembly which, in one embodiment, includes an annular forging having an integrally formed pump deck and shroud support is described. In the one embodiment, the annular forging also includes a top, cylindrical shaped end configured to be welded to one end of the pressure vessel cylindrical shell and a bottom, conical shaped end configured to be welded to the disk shaped bottom head. Reactor internal pump nozzles also are integrally formed in the annular forging. The nozzles do not include any internal or external projections. Stubs are formed in each nozzle opening to facilitate welding a pump housing to the forging. Also, an upper portion of each nozzle opening is configured to receive a portion of a diffuser coupled to a pump shaft which extends through the nozzle opening. Diffuser openings are formed in the integral pump deck to provide additional support for the pump impellers. The diffuser opening is sized so that a pump impeller can extend at least partially therethrough. The pump impeller is connected to the pump shaft which extends through the nozzle opening.
- Research Organization:
- ADVANCED REACTOR CORP
- DOE Contract Number:
- FC02-92NE34267
- Assignee:
- General Electric Company (Schenectady, NY)
- Patent Number(s):
- US 5721758
- OSTI ID:
- 871388
- Country of Publication:
- United States
- Language:
- English
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additional
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cylindrical
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cylindrical shell
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impeller
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partially
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stubs
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therethrough
top
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welded
welding
additional
annular
assembly
boiling
boiling water
bottom
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configured
conical
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coupled
cylindrical
cylindrical shape
cylindrical shell
deck
described
diffuser
disk
embodiment
extend
extends
external
facilitate
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impeller
impellers
integral
integrally
integrally formed
internal
junction
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nozzle
nozzles
nuclear
nuclear reactor
openings
partially
portion
pressure
pressure vessel
projections
provide
provide additional
pump
pump housing
pump impeller
pump shaft
reactor
receive
shaft
shaped
shell
shell junction
shroud
shroud support
sized
stubs
support
therethrough
top
upper
upper portion
vessel
water
water nuclear
welded
welding