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Title: Nuclear component horizontal seismic restraint

Abstract

A nuclear component horizontal seismic restraint. Small gaps limit horizontal displacement of components during a seismic occurrence and therefore reduce dynamic loadings on the free lower end. The reactor vessel and reactor guard vessel use thicker section roll-forged rings welded between the vessel straight shell sections and the bottom hemispherical head sections. The inside of the reactor guard vessel ring forging contains local vertical dovetail slots and upper ledge pockets to mount and retain field fitted and installed blocks. As an option, the horizontal displacement of the reactor vessel core support cone can be limited by including shop fitted/installed local blocks in opposing alignment with the reactor vessel forged ring. Beams embedded in the wall of the reactor building protrude into apertures in the thermal insulation shell adjacent the reactor guard vessel ring and have motion limit blocks attached thereto to provide to a predetermined clearance between the blocks and reactor guard vessel ring.

Inventors:
 [1]
  1. (Lynchburg, VA)
Issue Date:
Research Org.:
BABCOCK & WILCOX CO
OSTI Identifier:
866629
Patent Number(s):
4752436
Assignee:
Babcock & Wilcox Company (New Orleans, LA) OSTI
DOE Contract Number:  
AC06-79ET37111
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
nuclear; component; horizontal; seismic; restraint; gaps; limit; displacement; components; occurrence; reduce; dynamic; loadings; free; reactor; vessel; guard; thicker; section; roll-forged; rings; welded; straight; shell; sections; bottom; hemispherical; head; inside; forging; contains; local; vertical; dovetail; slots; upper; ledge; pockets; mount; retain; field; fitted; installed; blocks; option; core; support; cone; limited; including; shop; opposing; alignment; forged; beams; embedded; wall; building; protrude; apertures; thermal; insulation; adjacent; motion; attached; thereto; provide; predetermined; clearance; shell sections; attached thereto; thermal insulation; reactor vessel; guard vessel; shell section; core support; reactor building; dynamic loadings; seismic restraint; straight shell; nuclear component; component horizontal; horizontal displacement; horizontal seismic; vessel core; spherical head; dynamic loading; /376/52/976/

Citation Formats

Snyder, Glenn J. Nuclear component horizontal seismic restraint. United States: N. p., 1988. Web.
Snyder, Glenn J. Nuclear component horizontal seismic restraint. United States.
Snyder, Glenn J. Fri . "Nuclear component horizontal seismic restraint". United States. https://www.osti.gov/servlets/purl/866629.
@article{osti_866629,
title = {Nuclear component horizontal seismic restraint},
author = {Snyder, Glenn J.},
abstractNote = {A nuclear component horizontal seismic restraint. Small gaps limit horizontal displacement of components during a seismic occurrence and therefore reduce dynamic loadings on the free lower end. The reactor vessel and reactor guard vessel use thicker section roll-forged rings welded between the vessel straight shell sections and the bottom hemispherical head sections. The inside of the reactor guard vessel ring forging contains local vertical dovetail slots and upper ledge pockets to mount and retain field fitted and installed blocks. As an option, the horizontal displacement of the reactor vessel core support cone can be limited by including shop fitted/installed local blocks in opposing alignment with the reactor vessel forged ring. Beams embedded in the wall of the reactor building protrude into apertures in the thermal insulation shell adjacent the reactor guard vessel ring and have motion limit blocks attached thereto to provide to a predetermined clearance between the blocks and reactor guard vessel ring.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1988},
month = {1}
}

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