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Title: Support arrangements for core modules of nuclear reactors. [PWR]

Abstract

A support arrangement is provided for the core modules of a nuclear reactor which provides support access through the control drive mechanisms of the reactor. This arrangement provides axial support of individual reactor core modules from the pressure vessel head in a manner which permits attachment and detachment of the modules from the head to be accomplished through the control drive mechanisms after their leadscrews have been removed. The arrangement includes a module support nut which is suspended from the pressure vessel head and screw threaded to the shroud housing for the module. A spline lock prevents loosening of the screw connection. An installation tool assembly, including a cell lifting and preloading tool and a torquing tool, fits through the control drive mechanism and provides lifting of the shroud housing while disconnecting the spline lock, as well as application of torque to the module support nut.

Inventors:
Issue Date:
OSTI Identifier:
7030571
Application Number:
ON: DE84014248
Assignee:
Dept. of Energy ERA-09-035517; EDB-84-117122
DOE Contract Number:  
AC12-76SN00052
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
22 GENERAL STUDIES OF NUCLEAR REACTORS; 21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS; CONTROL ROD DRIVES; PWR TYPE REACTORS; REMOTE HANDLING EQUIPMENT; FASTENERS; REACTOR INTERNALS; REACTOR MAINTENANCE; EQUIPMENT; MAINTENANCE; MATERIALS HANDLING EQUIPMENT; REACTOR COMPONENTS; REACTORS; WATER COOLED REACTORS; WATER MODERATED REACTORS; 220400* - Nuclear Reactor Technology- Control Systems; 210200 - Power Reactors, Nonbreeding, Light-Water Moderated, Nonboiling Water Cooled

Citation Formats

Bollinger, L.R. Support arrangements for core modules of nuclear reactors. [PWR]. United States: N. p., 1983. Web.
Bollinger, L.R. Support arrangements for core modules of nuclear reactors. [PWR]. United States.
Bollinger, L.R. Thu . "Support arrangements for core modules of nuclear reactors. [PWR]". United States.
@article{osti_7030571,
title = {Support arrangements for core modules of nuclear reactors. [PWR]},
author = {Bollinger, L.R.},
abstractNote = {A support arrangement is provided for the core modules of a nuclear reactor which provides support access through the control drive mechanisms of the reactor. This arrangement provides axial support of individual reactor core modules from the pressure vessel head in a manner which permits attachment and detachment of the modules from the head to be accomplished through the control drive mechanisms after their leadscrews have been removed. The arrangement includes a module support nut which is suspended from the pressure vessel head and screw threaded to the shroud housing for the module. A spline lock prevents loosening of the screw connection. An installation tool assembly, including a cell lifting and preloading tool and a torquing tool, fits through the control drive mechanism and provides lifting of the shroud housing while disconnecting the spline lock, as well as application of torque to the module support nut.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1983},
month = {11}
}