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Title: Nuclear reactor alignment plate configuration

Abstract

An alignment plate that is attached to a core barrel of a pressurized water reactor and fits within slots within a top plate of a lower core shroud and upper core plate to maintain lateral alignment of the reactor internals. The alignment plate is connected to the core barrel through two vertically-spaced dowel pins that extend from the outside surface of the core barrel through a reinforcement pad and into corresponding holes in the alignment plate. Additionally, threaded fasteners are inserted around the perimeter of the reinforcement pad and into the alignment plate to further secure the alignment plate to the core barrel. A fillet weld also is deposited around the perimeter of the reinforcement pad. To accomodate thermal growth between the alignment plate and the core barrel, a gap is left above, below and at both sides of one of the dowel pins in the alignment plate holes through with the dowel pins pass.

Inventors:
; ; ;
Publication Date:
Research Org.:
Westinghouse Electric Company LLC, Cranberry Township, PA, USA
Sponsoring Org.:
USDOE
OSTI Identifier:
1117865
Patent Number(s):
8,638,900
Application Number:
11/855,196
Assignee:
Westinghouse Electric Company LLC (Cranberry Township, PA) IDO
DOE Contract Number:
FC07-05ID14636
Resource Type:
Patent
Resource Relation:
Patent File Date: 2007 Sep 14
Country of Publication:
United States
Language:
English
Subject:
21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS

Citation Formats

Altman, David A, Forsyth, David R, Smith, Richard E, and Singleton, Norman R. Nuclear reactor alignment plate configuration. United States: N. p., 2014. Web.
Altman, David A, Forsyth, David R, Smith, Richard E, & Singleton, Norman R. Nuclear reactor alignment plate configuration. United States.
Altman, David A, Forsyth, David R, Smith, Richard E, and Singleton, Norman R. Tue . "Nuclear reactor alignment plate configuration". United States. doi:. https://www.osti.gov/servlets/purl/1117865.
@article{osti_1117865,
title = {Nuclear reactor alignment plate configuration},
author = {Altman, David A and Forsyth, David R and Smith, Richard E and Singleton, Norman R},
abstractNote = {An alignment plate that is attached to a core barrel of a pressurized water reactor and fits within slots within a top plate of a lower core shroud and upper core plate to maintain lateral alignment of the reactor internals. The alignment plate is connected to the core barrel through two vertically-spaced dowel pins that extend from the outside surface of the core barrel through a reinforcement pad and into corresponding holes in the alignment plate. Additionally, threaded fasteners are inserted around the perimeter of the reinforcement pad and into the alignment plate to further secure the alignment plate to the core barrel. A fillet weld also is deposited around the perimeter of the reinforcement pad. To accomodate thermal growth between the alignment plate and the core barrel, a gap is left above, below and at both sides of one of the dowel pins in the alignment plate holes through with the dowel pins pass.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Jan 28 00:00:00 EST 2014},
month = {Tue Jan 28 00:00:00 EST 2014}
}

Patent:

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  • An alignment system that employs jacking block assemblies and alignment posts around the periphery of the top plate of a nuclear reactor lower internals core shroud to align an upper core plate with the lower internals and the core shroud with the core barrel. The distal ends of the alignment posts are chamfered and are closely received within notches machined in the upper core plate at spaced locations around the outer circumference of the upper core plate. The jacking block assemblies are used to center the core shroud in the core barrel and the alignment posts assure the proper orientationmore » of the upper core plate. The alignment posts may alternately be formed in the upper core plate and the notches may be formed in top plate.« less
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