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Title: Nuclear reactor neutron shielding

Abstract

A nuclear reactor includes a reactor pressure vessel and a nuclear reactor core comprising fissile material disposed in a lower portion of the reactor pressure vessel. The lower portion of the reactor pressure vessel is disposed in a reactor cavity. An annular neutron stop is located at an elevation above the uppermost elevation of the nuclear reactor core. The annular neutron stop comprises neutron absorbing material filling an annular gap between the reactor pressure vessel and the wall of the reactor cavity. The annular neutron stop may comprise an outer neutron stop ring attached to the wall of the reactor cavity, and an inner neutron stop ring attached to the reactor pressure vessel. An excore instrument guide tube penetrates through the annular neutron stop, and a neutron plug comprising neutron absorbing material is disposed in the tube at the penetration through the neutron stop.

Inventors:
; ;
Issue Date:
Research Org.:
BWXT mPower, Inc., Charlotte, NC (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1389838
Patent Number(s):
9761332
Application Number:
14/299,353
Assignee:
BWXT mPower, Inc.
Patent Classifications (CPCs):
G - PHYSICS G21 - NUCLEAR PHYSICS G21C - NUCLEAR REACTORS
G - PHYSICS G21 - NUCLEAR PHYSICS G21F - PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULAR RADIATION OR PARTICLE BOMBARDMENT
DOE Contract Number:  
NE0000583
Resource Type:
Patent
Resource Relation:
Patent File Date: 2014 Jun 09
Country of Publication:
United States
Language:
English
Subject:
22 GENERAL STUDIES OF NUCLEAR REACTORS

Citation Formats

Speaker, Daniel P, Neeley, Gary W, and Inman, James B. Nuclear reactor neutron shielding. United States: N. p., 2017. Web.
Speaker, Daniel P, Neeley, Gary W, & Inman, James B. Nuclear reactor neutron shielding. United States.
Speaker, Daniel P, Neeley, Gary W, and Inman, James B. Tue . "Nuclear reactor neutron shielding". United States. https://www.osti.gov/servlets/purl/1389838.
@article{osti_1389838,
title = {Nuclear reactor neutron shielding},
author = {Speaker, Daniel P and Neeley, Gary W and Inman, James B},
abstractNote = {A nuclear reactor includes a reactor pressure vessel and a nuclear reactor core comprising fissile material disposed in a lower portion of the reactor pressure vessel. The lower portion of the reactor pressure vessel is disposed in a reactor cavity. An annular neutron stop is located at an elevation above the uppermost elevation of the nuclear reactor core. The annular neutron stop comprises neutron absorbing material filling an annular gap between the reactor pressure vessel and the wall of the reactor cavity. The annular neutron stop may comprise an outer neutron stop ring attached to the wall of the reactor cavity, and an inner neutron stop ring attached to the reactor pressure vessel. An excore instrument guide tube penetrates through the annular neutron stop, and a neutron plug comprising neutron absorbing material is disposed in the tube at the penetration through the neutron stop.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2017},
month = {9}
}

Works referenced in this record:

Porous Bodies of Controlled Densities and Methods of Making Them
patent, October 1964


Nuclear Reactor Comprising A Core Cover
patent, November 1973


Shipping container for nuclear fuels
patent, September 1976


Radiation shield for nuclear reactors
patent, May 1978


Shield bag
patent, October 1978


Nuclear reactor cavity streaming shield
patent, November 1978


Integral reactor cavity seal/shield
patent, June 1989


Permanent cavity seal ring for a nuclear reactor containment arrangement
patent, February 1990


Permanent refueling pool seal
patent, April 1992


Shield apparatus
patent, August 1993


Radiation shield
patent, April 1996


Neutron Shielding Material Composition, Shielding Material and Container
patent-application, February 2008


Nuclear Reactor Vessel Fuel Thermal Insulating Barrier
patent-application, August 2008


Borated Concrete-Rubber
patent-application, October 2010


Incore Instrument Core Performance Verification Method
patent-application, January 2011


Radial Neutron Reflector
patent-application, October 2013