# NRC CAL – NOV (White)
> **EA-08-220** · CAL · Issued 2008-10-27 · Reactor Licensees
## Action
- **EA Number:** EA-08-220
- **Licensee:** NOV (White)
- **Category:** Reactor Licensees
- **Action type:** CAL
- **Date issued:** 2008-10-27
## Description

On October 27, 2008, a Notice of Violation was issued for a violation associated with a White Significance Determination Finding involving a violation of 10 CFR 50, Appendix B, Criterion XVI. The violation involved the failure to take adequate corrective action related to the service water strainer backwash system. Specifically, a plant modification implemented to address a macro-fouling concern associated with the service water strainers (1) utilized non-safety-related instrument air to support backwash operations, and (2) did not account for the impact on timely operator response following a safety injection signal or loss of instrument air. As a result, there was a lack of reasonable assurance that the service water system would have been capable of performing its safety-related function during a time of high fouling potential. The finding does not represent a current safety concern because temporary modifications and appropriate procedural changes have been made to address periods of potential macro-fouling.

## Source
- [Full enforcement letter (PDF)](https://www.nrc.gov/docs/ML0830/ML083020604.pdf)
- [NRC Reactor Licensees index](https://www.nrc.gov/reading-rm/doc-collections/enforcement/actions/reactors/)
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