ENS 40364: Difference between revisions

v t e ENS Event
05:00 Oct 3, 2003
Title	Noncomformance Notification for Solid State Protection Master Relay
Event Description	Failure of Master Relay K507 (MidTex Part Number 15614D200) in the Solid State Protection System (SSPS) was attributed to corrosion caused by off-gassing of chlorine contamination from paper used to wrap the relay coil, or the adhesive used to attach the paper wrap to the coil. Master Relays must change state, upon energization, to actuate various safety related equipment in the plant. The failure of Master Relay K507 is considered to be a manufacturing defect in a basic component that could cause a loss of safety function. The majority of MidTex relays investigated had cloth wrapped coils and these relays showed no evidence of corrosion. The number of affected relays and installed locations was not available at the time of the initial notification. The licensee will notify the NRC Resident Inspector.

ENS 40364 +/-
Where
Summer South Carolina (NRC Region 2)
Reporting

10 CFR 21.21
Time - Person (Reporting Time:+1424.62 h59.359 days <br />8.48 weeks <br />1.951 months <br />)
Opened:	Jeff Pease 14:37 Dec 1, 2003
NRC Officer:	Jeff Rotton
Last Updated:	Dec 1, 2003
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v • d • e

v t e Emergency Notification System
Summer with 10 CFR 21.21, Notification of failure to comply or existence of a defect and its evaluation
WEEKMONTHYEAR2003-10-03T05:00:00 [Table view]
[ENS list for Summer]

@@ Line 16: / Line 16: @@
 | event date = 10/03/2003 EST
 | last update date = 12/01/2003
-| title = Noncomformance Notification For Solid State Protection Master Relay
+| title = Noncomformance Notification for Solid State Protection Master Relay
 | event text = Failure of Master Relay K507 (MidTex Part Number 15614D200) in the Solid State Protection System (SSPS) was attributed to corrosion caused by off-gassing of chlorine contamination from paper used to wrap the relay coil, or the adhesive used to attach the paper wrap to the coil.  Master Relays must change state, upon energization, to actuate various safety related equipment in the plant.  The failure of Master Relay K507 is considered to be a manufacturing defect in a basic component that could cause a loss of safety function.
 The majority of MidTex relays investigated had cloth wrapped coils and these relays showed no evidence of corrosion.

Latest revision as of 21:24, 1 March 2018