# NRC NOV – NOV (White)
> **EA-13-083** · NOV · Issued 2013-12-23 · Reactor Licensees
## Action
- **EA Number:** EA-13-083
- **Licensee:** NOV (White)
- **Category:** Reactor Licensees
- **Action type:** NOV
- **Date issued:** 2013-12-23
## Description

On December 23, 2013, the NRC issued a Notice of Violation associated with a White Significance Determination Process finding identified during an inspection of the San Onofre Nuclear Generating Station, Unit 3. This White finding, an issue of low to moderate safety significance, involves the failure of San Onofre personnel to verify the adequacy of the thermal-hydraulic and flow-induced vibration design of the Unit 3 replacement steam generators, which resulted in significant and unexpected steam generator tube wear and the loss of tube integrity on Unit 3 Steam Generator 3EO-88 after 11 months of operation.

## Source
- [Full enforcement letter (PDF)](https://www.nrc.gov/docs/ML1335/ML13357A058.pdf)
- [NRC Reactor Licensees index](https://www.nrc.gov/reading-rm/doc-collections/enforcement/actions/reactors/)
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