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Title: Nuclear reactor shield including magnesium oxide

Abstract

An improvement in nuclear reactor shielding of a type used in reactor applications involving significant amounts of fast neutron flux, the reactor shielding including means providing structural support, neutron moderator material, neutron absorber material and other components as described below, wherein at least a portion of the neutron moderator material is magnesium in the form of magnesium oxide either alone or in combination with other moderator materials such as graphite and iron.

Inventors:
 [1];  [2]
  1. (Del Mar, CA)
  2. (La Jolla, CA)
Publication Date:
Research Org.:
General Atomic Co., San Diego, Calif.
OSTI Identifier:
863914
Patent Number(s):
US 4274922
Assignee:
United States of America as represented by United States (Washington, DC) OSTI
DOE Contract Number:
EY-76-C-03-0167
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
nuclear; reactor; shield; including; magnesium; oxide; improvement; shielding; type; applications; involving; significant; amounts; fast; neutron; flux; means; providing; structural; support; moderator; material; absorber; components; described; below; portion; form; combination; materials; graphite; iron; including means; structural support; fast neutron; neutron absorber; significant amounts; nuclear reactor; neutron flux; magnesium oxide; absorber material; providing structural; significant amount; sorber material; reactor shielding; reactor shield; reactor applications; /376/976/

Citation Formats

Rouse, Carl A., and Simnad, Massoud T. Nuclear reactor shield including magnesium oxide. United States: N. p., 1981. Web.
Rouse, Carl A., & Simnad, Massoud T. Nuclear reactor shield including magnesium oxide. United States.
Rouse, Carl A., and Simnad, Massoud T. 1981. "Nuclear reactor shield including magnesium oxide". United States. doi:. https://www.osti.gov/servlets/purl/863914.
@article{osti_863914,
title = {Nuclear reactor shield including magnesium oxide},
author = {Rouse, Carl A. and Simnad, Massoud T.},
abstractNote = {An improvement in nuclear reactor shielding of a type used in reactor applications involving significant amounts of fast neutron flux, the reactor shielding including means providing structural support, neutron moderator material, neutron absorber material and other components as described below, wherein at least a portion of the neutron moderator material is magnesium in the form of magnesium oxide either alone or in combination with other moderator materials such as graphite and iron.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = 1981,
month = 1
}

Patent:

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  • An improvement is described for nuclear reactor shielding of a type used in reactor applications involving significant amounts of fast neutron flux. The reactor shielding includes means providing structural support, neutron moderator material, neutron absorber material and other components, wherein at least a portion of the neutron moderator material is magnesium in the form of magnesium oxide either alone or in combination with other moderator materials such as graphite and iron.
  • This patent describes a method of limiting the movement of a thermal shield of a nuclear reactor. It comprises: machining at least four (4) pockets in upper portions of a thermal shield circumferentially about a core barrel of a nuclear reactor to receive key-wave inserts; tapping bolt holes in the pockets of the thermal shield to receive bolts; positioning key-wave inserts into the pockets of the thermal shield to be bolted in place with the bolt holes; machining dowel holes at least partially through the positioned key-way inserts and the thermal shield to receive dowel pins; positioning dowel pins inmore » the dowel holes in the key-way insert and thermal shield to tangentially restrain movement of the thermal shield relative to the core barrel; sliding limiter keys into the key-way inserts and bolting the limiter keys to the core barrel to tangentially restrain movement of the thermal shield relative and the core barrel while allowing radial and axial movement of the thermal shield relative to the core barrel; machining dowel holes through the limiter key and at least partially through the core barrel to receive dowel pins; positioning dowel pins in the dowel holes in the limiter key and core barrel to restrain tangential movement of the thermal shield relative to the core barrel of the nuclear reactor.« less
  • A reinforced concrete shield for a nuclear reactor and a method for constructing the same are described. The interior surface of the concrete shield wall is lined with a layer of heat insulator.