# NRC CAL – NOV (White)
> **EA-08-272** · CAL · Issued 2009-01-27 · Reactor Licensees
## Action
- **EA Number:** EA-08-272
- **Licensee:** NOV (White)
- **Category:** Reactor Licensees
- **Action type:** CAL
- **Date issued:** 2009-01-27
## Description

On January 27, 2009, a Notice of Violation was issued to Northern States Power Company for a violation of Technical Specifications associated with a White Significance Determination finding at Prairie Island Nuclear Generating Plant. Specifically, the licensee failed to adequately control the position of a normally open pressure switch block valve for the Unit 1 turbine-driven auxiliary feedwater pump. The valve was inadvertently left closed, causing the turbine-driven auxiliary feedwater pump to fail to operate as required following a July 31, 2008, Unit 1 reactor trip. The pump was subsequently determined to have been inoperable for 138 days, a time period that significantly exceeded that allowed by the Technical Specifications.

## Source
- [Full enforcement letter (PDF)](https://www.nrc.gov/docs/ML0902/ML090270979.pdf)
- [NRC Reactor Licensees index](https://www.nrc.gov/reading-rm/doc-collections/enforcement/actions/reactors/)
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