Bottom head to shell junction assembly for a boiling water nuclear reactor
- 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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Related Subjects
head
shell
junction
assembly
boiling
water
nuclear
reactor
embodiment
annular
forging
integrally
formed
pump
deck
shroud
support
described
top
cylindrical
shaped
configured
welded
pressure
vessel
conical
disk
internal
nozzles
external
projections
stubs
nozzle
facilitate
welding
housing
upper
portion
receive
diffuser
coupled
shaft
extends
openings
integral
provide
additional
impellers
sized
impeller
extend
partially
therethrough
connected
cylindrical shell
pump impeller
pump shaft
provide additional
bottom head
integrally formed
pressure vessel
nuclear reactor
upper portion
boiling water
pump housing
water nuclear
shroud support
shell junction
cylindrical shape
junction assembly
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