Primary Inventor: Krishna P. Singh
Contributing Inventor(s): Leyland Vann, Patrick Ingravallo
Date: Aug. 17, 2021
Status: Granted
Jurisdiction: US
Assignee: SMR Inventec, LLC
Equipment Type: CRDS, SMR-160
Docket NumberHOL-067, HOL-067-US-CON
Patent Number: US 11,094,421 B2
Application Number: 16/744,144

Prior Publication Data: US 2020/0152341 A1, May 14, 2020

Related U.S. Application Data:

  • Continuation of application No. 16/406,852, filed on May 8, 2019, now Pat. No. US, 10,573,418, which is a continuation of application No. 15/288,436, filed on Oct. 7, 2016, now Pat. No. US 10,573,419 B2,, which is a continuation of application No. 14/417,628, filed as application No. PCT/US2013/053644 on Aug. 5, 2013, now Pat. No. 9,496,057.
  • Provisional application No. 61/680,133, filed on Aug. 6, 2012.

Abstract: A control rod drive system (CRDS) for use in a nuclear reactor. In one embodiment, the system generally includes a drive rod mechanically coupled to a control rod drive mechanism (CRDM) operable to linearly raise and lower the to drive rod along a vertical axis, a rod cluster control assembly (RCCA) comprising a plurality of control rods insertable into a nuclear fuel core, and a drive rod extension (DRE) releasably coupled at opposing ends to the drive rod and RCCA. The CRDM includes an electromagnet which operates to couple the CRDM to DRE. In the event of a power loss or SCRAM, the CRDM may be configured to remotely uncouple the RCCA from the DRE without releasing or dropping the drive rod which remains engaged with, the CRDM and in position.