ENS 56992

v t e ENS Event
06:00 Dec 22, 2023
Title	Part 21 - Air Start Valve (Bent Bottom Stem)
Event Description	The following is a summary of the information provided by Fairbanks Morse Engine via email: Prairie Island Nuclear Generating Plant (PINGP) was conducting a planned replacement of emergency diesel generator air start solenoid valves when it discovered that the bottom stem appeared to be bent and observed air leakage. PINGP returned five valves to Fairbanks Morse, and they returned them to the manufacturer, ASCO. ASCO reassembled one valve and confirmed there was air leakage through the valve. The leakage path was from the air supply port to the exhaust port when the valve was in the de-energized normally open state. ASCO functionally tested the remaining four valves and found a second valve that also leaked. ASCO and Fairbanks Morse have implemented corrective actions to address this issue. Fairbanks Morse will notify PINGP and Limerick Generating Station. Affected plants with potentially defected parts: Prairie Island Nuclear Generating Plant and Limerick Generating Station. Point of Contact: Martin Kurr Quality Assurance Manager Fairbanks Morse 608-364-8247 Martin.Kurr@fmdefense.com Fairbanks Morse Notification Report Number: 23-01

ENS 56992 +/-
Where
Fairbanks Morse Engine Beloit, Wisconsin (NRC Region 3)
Organization:	Fairbanks Morse Engine
Reporting

10 CFR 21.21(d)(3)(i), Failure to Comply or Defect
Time - Person (Reporting Time:+1574.78 h65.616 days <br />9.374 weeks <br />2.157 months <br />)
Opened:	Martin Kurr 20:47 Feb 25, 2024
NRC Officer:	Kerby Scales
Last Updated:	Feb 25, 2024
56992 - NRC Website
v • d • e

v t e Emergency Notification System
Fairbanks Morse Engine with 10 CFR 21.21(d)(3)(i), Failure to Comply or Defect
WEEKMONTHYEAR2023-12-23T06:00:00 [Table view]
[ENS list for Fairbanks Morse Engine]

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