Global to push GA events into
skip to main content

Title: Pressurizer tank upper support

A pressurizer tank in a pressurized water nuclear reactor is mounted between structural walls of the reactor on a substructure of the reactor, the tank extending upwardly from the substructure. For bearing lateral loads such as seismic shocks, a girder substantially encircles the pressurizer tank at a space above the substructure and is coupled to the structural walls via opposed sway struts. Each sway strut is attached at one end to the girder and at an opposite end to one of the structural walls, and the sway struts are oriented substantially horizontally in pairs aligned substantially along tangents to the wall of the circular tank. Preferably, eight sway struts attach to the girder at 90[degree] intervals. A compartment encloses the pressurizer tank and forms the structural wall. The sway struts attach to corners of the compartment for maximum stiffness and load bearing capacity. A valve support frame carrying the relief/discharge piping and valves of an automatic depressurization arrangement is fixed to the girder, whereby lateral loads on the relief/discharge piping are coupled directly to the compartment rather than through any portion of the pressurizer tank. Thermal insulation for the valve support frame prevents thermal loading of the piping and valves.more » The girder is shimmed to define a gap for reducing thermal transfer, and the girder is free to move vertically relative to the compartment walls, for accommodating dimensional variation of the pressurizer tank with changes in temperature and pressure. 10 figures.« less
Inventors:
;
Issue Date:
OSTI Identifier:
5170856
Assignee:
Westinghouse Electric Corp., Pittsburgh, PA () OAK; EDB-94-062782
Patent Number(s):
US 5278880; A
Application Number:
PPN: US 7-903834
Contract Number:
AC03-90SF18495
Resource Relation:
Patent File Date: 24 Jun 1992
Research Org:
Westinghouse Electric Corp
Country of Publication:
United States
Language:
English
Subject:
21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS; PRESSURIZERS; SUPPORTS; PWR TYPE REACTORS; DESIGN; DEPRESSURIZATION; POSITIONING; ENRICHED URANIUM REACTORS; MECHANICAL STRUCTURES; POWER REACTORS; REACTORS; THERMAL REACTORS; WATER COOLED REACTORS; WATER MODERATED REACTORS; 210200* - Power Reactors, Nonbreeding, Light-Water Moderated, Nonboiling Water Cooled