ENS 45809

v t e ENS Event
04:00 Apr 2, 2010
Title	Possible Failure of Solenoid Valves with Dual Function Main Steam Safety Valves
Event Description	The following information was received via facsimile: Tyco Valves & Controls LP (TVC), a business unit of Tyco Flow Control, is a contractor to certain NRC licensees, and on behalf of itself and certain of its affiliates, hereby submits information in response to notification requirements of 10 CFR Part 21. TVC manufactures, sells, and services Pressure Relief Valves (PRVs) to NRC licensees for use in NRC licensed facilities. On February 4, 2010, EPRI issued a notification of a potential 10 CFR Part 21 defect for Main Steam Safety Valves manufactured by Crosby Valve & Gage (Crosby). Crosby became a brand of TVC when they were purchased by them in 1998. The reported problem stems from an issue with the solenoid valve that controls the pneumatic actuator on certain main steam safety valves that were supplied during the early 1980's. Following is a list of U.S. plants that may have been affected by this issue: Utility Unit Start Up PA Power & Light Susquehanna 1 & 2 1983 & 1985 Exelon LaSalle I & 2 1984 Energy NW Columbia 1984 Entergy Riverbend 1986 TVC continues to investigate the reported problem, but is requesting a 30 day extension to complete the evaluation due to the complexity of the situation.

ENS 45809 +/-
Where
Crosby Valve And Gage Wrentham, Massachusetts (NRC Region 1)
Organization:	Tyco Flow Control
Reporting

10 CFR 21.21
Time - Person (Reporting Time:+13.2 h0.55 days <br />0.0786 weeks <br />0.0181 months <br />)
Opened:	David Thibault 17:12 Apr 2, 2010
NRC Officer:	Dong Park
Last Updated:	Apr 2, 2010
45809 - NRC Website
v • d • e

v t e Emergency Notification System
Crosby Valve And Gage with 10 CFR 21.21
WEEKMONTHYEAR2010-04-02T04:00:00 [Table view]
[ENS list for Crosby Valve And Gage]

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