# NRC CAL – NOV (White)
> **EA-17-098** · CAL · Issued 2017-11-27 · Reactor Licensees
## Action
- **EA Number:** EA-17-098
- **Licensee:** NOV (White)
- **Category:** Reactor Licensees
- **Action type:** CAL
- **Date issued:** 2017-11-27
## Description

On November 27, 2017, the NRC issued a Notice of Violation to Exelon Generation Company (Exelon) for a violation of Title 10 of the Code of Federal Regulations Part 50, Appendix B, Criterion III at Clinton Power Station, associated with a White Significance Determination Process finding. Contrary to the requirements, Exelon failed to review for suitability of application replacement relays essential to the safety-related functions of the Division 1 Emergency Diesel Generator (EDG) Room Ventilation Fan. Specifically, Exelon failed to evaluate the change in the actual drop out voltages for replacement relays associated with the Division 1 EDG Room Ventilation Fan resulting in the safety-related fan becoming inoperable during undervoltage conditions. Additionally, there is an associated violation of Technical Specification 3.8.1, "AC Sources-Operating," for one Standby Diesel Generator being inoperable for greater than the allowed outage time of 14 days.

## Source
- [Full enforcement letter (PDF)](https://www.nrc.gov/docs/ML1733/ML17331B161.pdf)
- [NRC Reactor Licensees index](https://www.nrc.gov/reading-rm/doc-collections/enforcement/actions/reactors/)
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