# NRC CAL – NOV (White)
> **EA-16-241** · CAL · Issued 2017-04-13 · Reactor Licensees
## Action
- **EA Number:** EA-16-241
- **Licensee:** NOV (White)
- **Category:** Reactor Licensees
- **Action type:** CAL
- **Date issued:** 2017-04-13
## Description

On April 13, 2017, the NRC issued a Notice of Violation to Exelon Nuclear (Exelon) for a violation of Technical Specification 6.8.1, “Procedures and Programs,” at Oyster Creek associated with a White Significance Determination Process finding. Specifically, Exelon failed to properly implement a procedure for rebuilding and reassembly of an electromagnetic relief valve. The maintenance instruction directed reinstallation of a lever plate with previously removed lock washers. By failing to reinstall the lock washers, the licensee caused excessive friction between the solenoid frame and the cut-out switch lever plate, causing the cut-out switch lever to become bound in the energized position and rendering the valve unable to perform its safety-related function. Additionally, this incorrect reassembly resulted in the relief valve being inoperable for greater than the Technical Specification allowed outage time for the Automatic Depressurization System.

## Source
- [Full enforcement letter (PDF)](https://www.nrc.gov/docs/ML1710/ML17101A422.pdf)
- [NRC Reactor Licensees index](https://www.nrc.gov/reading-rm/doc-collections/enforcement/actions/reactors/)
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