# NRC CAL – NOV (White)
> **EA-17-122** · CAL · Issued 2017-10-16 · Reactor Licensees
## Action
- **EA Number:** EA-17-122
- **Licensee:** NOV (White)
- **Category:** Reactor Licensees
- **Action type:** CAL
- **Date issued:** 2017-10-16
## Description

On October, 16, 2017, the NRC issued a Notice of Violation to Duke Energy Corporation, for a violation of Technical Specification, 5.4.1.a, "Procedures," and Title 10 of the Code of Federal Regulations, Part 50, Appendix B, that were associated with a White Significance Determination Process finding at Catawba Nuclear Station, Unit 2. Specifically, the licensee failed to develop adequate preventive maintenance strategies for the emergency diesel generator (EDG) excitation system. As a result, a condition adverse to quality associated with elevated diode temperatures was uncorrected. This caused the 2A EDG output breaker to trip open during monthly surveillance testing.

## Source
- [Full enforcement letter (PDF)](https://www.nrc.gov/docs/ML1728/ML17289A300.pdf)
- [NRC Reactor Licensees index](https://www.nrc.gov/reading-rm/doc-collections/enforcement/actions/reactors/)
---
*MORVS · CC0 1.0*