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Title: Nuclear reactor shutdown control rod assembly

Abstract

This patent describes a nuclear reactor having a reactor core and a reactor coolant flowing therethrough, a temperature responsive, self-actuated nuclear reactor shutdown control rod assembly, comprising: an upper drive line terminating at its lower end with a substantially cylindrical wall member having inner and outer surfaces; a lower drive line having a lower end adapted to be attached to a neutron absorber; a ring movable disposed about the outer surface of the wall member of the upper drive line; thermal actuation means adapted to be in heat exchange relationship with coolant in an associated reactor core and in contact with the ring, and balls located within the openings in the upper drive line. When reactor coolant approaches a predetermined design temperature the actuation means moves the ring sufficiently so that the balls move radially out from the recess and into the space formed by the second portion of the ring thereby removing the vertical support for the lower drive line such that the lower drive line moves downwardly and inserts an associated neutron absorber into an associated reactor core resulting in automatic reduction of reactor power.

Inventors:
Publication Date:
OSTI Identifier:
5075142
Patent Number(s):
US 4734252
Application Number:
TRN: 88-021690
Assignee:
Dept. of Energy, Washington, DC
Resource Type:
Patent
Resource Relation:
Patent File Date: Filed date 7 Aug 1986
Country of Publication:
United States
Language:
English
Subject:
22 GENERAL STUDIES OF NUCLEAR REACTORS; CONTROL ELEMENTS; DESIGN; AUTOMATION; COOLANTS; COOLING; HEAT EXCHANGERS; OPERATION; REACTOR COOLING SYSTEMS; REACTOR CORES; REACTOR SAFETY; REACTOR SHUTDOWN; THERMODYNAMICS; COOLING SYSTEMS; ENERGY SYSTEMS; REACTOR COMPONENTS; SAFETY; SHUTDOWNS; 220400* - Nuclear Reactor Technology- Control Systems; 220900 - Nuclear Reactor Technology- Reactor Safety

Citation Formats

Bilibin, K. Nuclear reactor shutdown control rod assembly. United States: N. p., 1988. Web.
Bilibin, K. Nuclear reactor shutdown control rod assembly. United States.
Bilibin, K. Tue . "Nuclear reactor shutdown control rod assembly". United States.
@article{osti_5075142,
title = {Nuclear reactor shutdown control rod assembly},
author = {Bilibin, K},
abstractNote = {This patent describes a nuclear reactor having a reactor core and a reactor coolant flowing therethrough, a temperature responsive, self-actuated nuclear reactor shutdown control rod assembly, comprising: an upper drive line terminating at its lower end with a substantially cylindrical wall member having inner and outer surfaces; a lower drive line having a lower end adapted to be attached to a neutron absorber; a ring movable disposed about the outer surface of the wall member of the upper drive line; thermal actuation means adapted to be in heat exchange relationship with coolant in an associated reactor core and in contact with the ring, and balls located within the openings in the upper drive line. When reactor coolant approaches a predetermined design temperature the actuation means moves the ring sufficiently so that the balls move radially out from the recess and into the space formed by the second portion of the ring thereby removing the vertical support for the lower drive line such that the lower drive line moves downwardly and inserts an associated neutron absorber into an associated reactor core resulting in automatic reduction of reactor power.},
doi = {},
url = {https://www.osti.gov/biblio/5075142}, journal = {},
number = ,
volume = ,
place = {United States},
year = {1988},
month = {3}
}