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Title: Quick release latch for reactor scram

Abstract

A simple, reliable, and fast-acting means for releasing a control element and allowing it to be inserted rapidly into the core region of a nuclear reactor for scram purposes. A latch mechanism grips a coupling head on a nuclear control element to connect the control element to the control drive assembly. The latch mechanism is closed by tensioning a cable or rod with an actuator. The control element is released by de-energizing the actuator, providing fail-safe, rapid release of the control element to effect reactor shutdown. A sensing rod provides indication that the control element is properly positioned in the latch. Two embodiments are illustrated, one involving a collet-type latch mechanism, the other a pliers-type latch mechanism with the actuator located inside the reactor vessel.

Inventors:
 [1];  [2]
  1. Wichita, KS
  2. San Jose, CA
Issue Date:
Research Org.:
National Energy Technology Laboratory (NETL), Pittsburgh, PA, Morgantown, WV (United States)
OSTI Identifier:
862471
Patent Number(s):
3941413
Assignee:
United States of America as represented by United States Energy (Washington, DC)
Patent Classifications (CPCs):
Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE Y02E - REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
G - PHYSICS G21 - NUCLEAR PHYSICS G21C - NUCLEAR REACTORS
DOE Contract Number:  
AT(04-3)-893
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
quick; release; latch; reactor; scram; simple; reliable; fast-acting; means; releasing; control; element; allowing; inserted; rapidly; core; region; nuclear; purposes; mechanism; grips; coupling; head; connect; drive; assembly; closed; tensioning; cable; rod; actuator; released; de-energizing; providing; fail-safe; rapid; effect; shutdown; sensing; provides; indication; properly; positioned; embodiments; illustrated; involving; collet-type; pliers-type; located; inside; vessel; reactor scram; control drive; located inside; control element; reactor vessel; nuclear reactor; reactor shutdown; latch mechanism; core region; quick release; rapid release; drive assembly; nuclear control; /376/294/976/

Citation Formats

Johnson, Melvin L, and Shawver, Bruce M. Quick release latch for reactor scram. United States: N. p., 1976. Web.
Johnson, Melvin L, & Shawver, Bruce M. Quick release latch for reactor scram. United States.
Johnson, Melvin L, and Shawver, Bruce M. Thu . "Quick release latch for reactor scram". United States. https://www.osti.gov/servlets/purl/862471.
@article{osti_862471,
title = {Quick release latch for reactor scram},
author = {Johnson, Melvin L and Shawver, Bruce M},
abstractNote = {A simple, reliable, and fast-acting means for releasing a control element and allowing it to be inserted rapidly into the core region of a nuclear reactor for scram purposes. A latch mechanism grips a coupling head on a nuclear control element to connect the control element to the control drive assembly. The latch mechanism is closed by tensioning a cable or rod with an actuator. The control element is released by de-energizing the actuator, providing fail-safe, rapid release of the control element to effect reactor shutdown. A sensing rod provides indication that the control element is properly positioned in the latch. Two embodiments are illustrated, one involving a collet-type latch mechanism, the other a pliers-type latch mechanism with the actuator located inside the reactor vessel.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1976},
month = {1}
}

Patent:

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