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Title: Jacking mechanism for upper internals structure of a liquid metal nuclear reactor

Abstract

A jacking mechanism for raising the upper internals structure of a liquid metal nuclear reactor which jacking mechanism uses a system of gears and drive shafts to transmit force from a single motor to four mechanically synchronized ball jacks to raise and lower support columns which support the upper internals structure. The support columns have a pin structure which rides up and down in a slot in a housing fixed to the reactor head. The pin has two locking plates which can be rotated around the pin to bring bolt holes through the locking plates into alignment with a set of bolt holes in the housing, there being a set of such housing bolt holes corresponding to both a raised and a lowered position of the support column. When the locking plate is so aligned, a surface of the locking plate mates with a surface in the housing such that the support column is then supported by the locking plate and not by the ball jacks. Since the locking plates are to be installed and bolted to the housing during periods of reactor operation, the ball jacks need not be sized to react the large forces which occur or potentiallymore » could occur on the upper internals structure of the reactor during operation. The locking plates react these loads. The ball jacks, used only during refueling, can be smaller, which enable conventionally available equipment to fulfill the precision requirements for the task within available space.« less

Inventors:
 [1];  [1]
  1. (Greensburg, PA)
Issue Date:
Research Org.:
WESTINGHOUSE ELECTRIC CORP
OSTI Identifier:
864850
Patent Number(s):
4427621
Assignee:
Westinghouse Electric Corp. (Pittsburgh, PA) NETL
DOE Contract Number:  
AC15-76CL02395
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
jacking; mechanism; upper; internals; structure; liquid; metal; nuclear; reactor; raising; gears; drive; shafts; transmit; force; single; motor; mechanically; synchronized; ball; jacks; raise; support; columns; rides; slot; housing; fixed; head; locking; plates; rotated; bring; bolt; holes; alignment; set; corresponding; raised; lowered; position; column; plate; aligned; surface; mates; supported; installed; bolted; periods; operation; sized; react; forces; occur; potentially; loads; refueling; enable; conventionally; available; equipment; fulfill; precision; requirements; task; space; support column; drive shaft; nuclear reactor; liquid metal; reactor operation; upper internals; metal nuclear; internals structure; support columns; bolt holes; jacking mechanism; reactor head; transmit force; drive shafts; /376/976/

Citation Formats

Gillett, James E., and Wineman, Arthur L. Jacking mechanism for upper internals structure of a liquid metal nuclear reactor. United States: N. p., 1984. Web.
Gillett, James E., & Wineman, Arthur L. Jacking mechanism for upper internals structure of a liquid metal nuclear reactor. United States.
Gillett, James E., and Wineman, Arthur L. Sun . "Jacking mechanism for upper internals structure of a liquid metal nuclear reactor". United States. https://www.osti.gov/servlets/purl/864850.
@article{osti_864850,
title = {Jacking mechanism for upper internals structure of a liquid metal nuclear reactor},
author = {Gillett, James E. and Wineman, Arthur L.},
abstractNote = {A jacking mechanism for raising the upper internals structure of a liquid metal nuclear reactor which jacking mechanism uses a system of gears and drive shafts to transmit force from a single motor to four mechanically synchronized ball jacks to raise and lower support columns which support the upper internals structure. The support columns have a pin structure which rides up and down in a slot in a housing fixed to the reactor head. The pin has two locking plates which can be rotated around the pin to bring bolt holes through the locking plates into alignment with a set of bolt holes in the housing, there being a set of such housing bolt holes corresponding to both a raised and a lowered position of the support column. When the locking plate is so aligned, a surface of the locking plate mates with a surface in the housing such that the support column is then supported by the locking plate and not by the ball jacks. Since the locking plates are to be installed and bolted to the housing during periods of reactor operation, the ball jacks need not be sized to react the large forces which occur or potentially could occur on the upper internals structure of the reactor during operation. The locking plates react these loads. The ball jacks, used only during refueling, can be smaller, which enable conventionally available equipment to fulfill the precision requirements for the task within available space.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1984},
month = {1}
}

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