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Title: Bottom head to shell junction assembly for a boiling water nuclear reactor

Abstract

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.

Inventors:
 [1];  [1]
  1. San Jose, CA
Issue Date:
Research Org.:
ADVANCED REACTOR CORP
OSTI Identifier:
871388
Patent Number(s):
5721758
Assignee:
General Electric Company (Schenectady, NY)
Patent Classifications (CPCs):
Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE Y02E - REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
G - PHYSICS G21 - NUCLEAR PHYSICS G21C - NUCLEAR REACTORS
DOE Contract Number:  
FC02-92NE34267
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
bottom; 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; /376/

Citation Formats

Fife, Alex Blair, and Ballas, Gary J. Bottom head to shell junction assembly for a boiling water nuclear reactor. United States: N. p., 1998. Web.
Fife, Alex Blair, & Ballas, Gary J. Bottom head to shell junction assembly for a boiling water nuclear reactor. United States.
Fife, Alex Blair, and Ballas, Gary J. Thu . "Bottom head to shell junction assembly for a boiling water nuclear reactor". United States. https://www.osti.gov/servlets/purl/871388.
@article{osti_871388,
title = {Bottom head to shell junction assembly for a boiling water nuclear reactor},
author = {Fife, Alex Blair and Ballas, Gary J},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1998},
month = {1}
}

Patent:

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