CRDM designs with separate SCRAM latch engagement and locking
Abstract
A control rod drive mechanism (CRDM) includes a lifting rod supporting a control rod and a holding mechanism comprising an electromagnetic circuit with magnetic poles drawn together when the electromagnetic circuit is energized to hold the lifting rod. The hold is released upon de-energizing the electromagnetic circuit. A translation mechanism linearly translates the lifting rod held by the holding mechanism. The holding mechanism may include a non-magnetic spacer between the magnetic poles that defines a gap between the drawn together magnetic poles. The translation mechanism may include latches configured to engage an upper end of the lifting rod, and the holding mechanism draws the magnetic poles together to hold the latches engaged with the upper end of the lifting rod. A four-bar cam assembly may be used to cam the latches closed in response to a vertical actuation force applied to the cam bars.
- Inventors:
- Issue Date:
- Research Org.:
- BWXT mPower, Inc., Charlotte, NC (United States); BWXT Nuclear Operations Group, Lynchburg, VA (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1576350
- Patent Number(s):
- 10410755
- Application Number:
- 14/255,201
- Assignee:
- BWXT mPower, Inc. (Charlotte, NC); BWXT Nuclear Operations Group, Inc. (Lynchburg, VA)
- 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:
- NE0000583
- Resource Type:
- Patent
- Resource Relation:
- Patent File Date: 2014 Apr 17
- Country of Publication:
- United States
- Language:
- English
Citation Formats
DeSantis, Paul K., Stambaugh, Kevin J., Goodyear, Brett T., Edwards, Michael J., and Ales, Matthew W. CRDM designs with separate SCRAM latch engagement and locking. United States: N. p., 2019.
Web.
DeSantis, Paul K., Stambaugh, Kevin J., Goodyear, Brett T., Edwards, Michael J., & Ales, Matthew W. CRDM designs with separate SCRAM latch engagement and locking. United States.
DeSantis, Paul K., Stambaugh, Kevin J., Goodyear, Brett T., Edwards, Michael J., and Ales, Matthew W. Tue .
"CRDM designs with separate SCRAM latch engagement and locking". United States. https://www.osti.gov/servlets/purl/1576350.
@article{osti_1576350,
title = {CRDM designs with separate SCRAM latch engagement and locking},
author = {DeSantis, Paul K. and Stambaugh, Kevin J. and Goodyear, Brett T. and Edwards, Michael J. and Ales, Matthew W.},
abstractNote = {A control rod drive mechanism (CRDM) includes a lifting rod supporting a control rod and a holding mechanism comprising an electromagnetic circuit with magnetic poles drawn together when the electromagnetic circuit is energized to hold the lifting rod. The hold is released upon de-energizing the electromagnetic circuit. A translation mechanism linearly translates the lifting rod held by the holding mechanism. The holding mechanism may include a non-magnetic spacer between the magnetic poles that defines a gap between the drawn together magnetic poles. The translation mechanism may include latches configured to engage an upper end of the lifting rod, and the holding mechanism draws the magnetic poles together to hold the latches engaged with the upper end of the lifting rod. A four-bar cam assembly may be used to cam the latches closed in response to a vertical actuation force applied to the cam bars.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2019},
month = {9}
}