ML033370799
| ML033370799 | |
| Person / Time | |
|---|---|
| Site: | Summer  |
| Issue date: | 12/01/2003 |
| From: | Pease J South Carolina Electric & Gas Co |
| To: | Beckner W, Brian Bonser, Burgess B, Conte R, Foster J, Clay Johnson Office of Nuclear Reactor Regulation, NRC Region 1, NRC/RGN-II, NRC/RGN-III, NRC Region 4 |
| References | |
| 40364 | |
| Download: ML033370799 (2) | |
Text
41 1210112ar U.S. NuclearRegulatory Coiimisslon OperationsCenter Event Report Pa~ze I Power Reactor Event# 40364 Site: SUMMER Notification Date/ Time: 12/0112003 14:37 (EST)
Unit: 1 Region: 2 State: SC Event Date! Time: 10/03/2003 (EST)
Reactor Type: [1] W-3-LP Last Modification: 12/01/2003 Containment Type: DRY AMB NRC Notified by: JEFF PEASE Notifications: BRIAN BONSER R2 HQ Ops Officer: JEFF ROTTON WILLIAM BECKNER NRR Emergency Class: NON EMERGENCY RICHARD CONTE R1 10 CFR Section: BRUCE BURGESS R3 21.21 UNSPECIFIED PARAGRAPH CLAUDE JOHNSON R4 JACK FOSTER NRR Unit Scram Code RX Critlinit Power Initial RX Mode Curr Power Current RX Mode 1 N Yes 100 Power Operation 100 Power Operation NONCOMFORMANCE NOTIFICATION FOR SOLID STATE PROTECTION MASTER RELAY 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.
12- 1-03; 3:48AM;NOB SECOND FL SOUTH ;803 345 4356 # I/ I SAP-I 165 ATTACHMENT I REVISION 1 PAGE 1 OF SUBSTANTIAL SAFETY HAZARD (SSH) EVALUATION TRACKING SHEET
- (TO BE COMPLETED WITHIN 60 DAYS OF INITIAL DISCOVERY)
- 1. GENERAL INFORMATION Tracking Sheet Initiation Date 11/26/03 Number 03-0003 Discovery Date 10103/03
- 60 Day Due Date 12/02103 Reviewer M. G. Hicks Topic Failure of SSPS Master Relay (MidTex P/N 156-14D200) due to chlorine based corrosion How was topic first identified? NCN 03-3099 List correspondence, documents, telecons applicable to the determination of the SSH ** NCN 03-3099.
Pentas Controls. Inc., FAL No. 069, Root Cause of Failure Analysis for Mid-Tex 156-14D200 Relays. dated 11/20/03
- 2.
- DISPOSITION Determined to be an SSH, reportable per IOCFR21: 0 YES O NO DiscussionlJustification: ** SSPS Master Relays must change state. upon energization. to actuate various
{ -asafetv related equipment In the plant. The Pentas Controls failure report referenced above attributes the failure of Master Relay K507A:rroslon caused by off-gassing of chlorine contamination from paper used to wrap the relay coil. or the a8hesive used to attach the paper wrap to the coil. Another MidTex P/N 156-14D200 relay with a 2aper wragged coil. sent to Pentas for follow-up analysis showed evidence of the same type of corrosion. Therefore, 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.
This report is applicable only to MidTex relays with paper wrapped coils. The maioritv of MidTex relays investigated had cloth wranned coils, and these relavs showed no evidence of corrosion.
Signatures: Reviewer M.G.Hicks Date 11/2§/03
- Functional Manager Date 1/2 02
- Manager, NL 1D Q / Date Ii_7_Soy IA
- Determined not to be an SSH (attach a statement of justification)
Signature Title Date
- 3. Determined to be report9 jbe per 10CFR21 by SVPNO: 5-Day LLimit Due Date /
- SVPNO Signature 6 ie- Date __/j/_ _ Time 131R IA
- 4. NRC Informed - 2 Day Notification Of The Substantial Safety Hazard Due Date _____ ___3 Notified bySCE&G (Name) J74Q P°e .fe NRC (Name) .re 4775n-Date I17-- 0 ime /537 NRC (Title) 4 o1 01t=
Applicable Correspondence ** £A) 'o.? Y
- 5. NRC Informed - 30 Day Report of the Substantial Safety Hazard Due Date Letter to NRC Dated Applicable Correspondence **
- 6. Program Tracking Document (e.g., CER, ECR, Etc.) **
- 7. Closeout Manager, NL: Signature . Date -
IA Closed in RTS: Signature Date Transmitted to Records: Signature -
Date
- If the evaluation cannot be completed, an interim report must be submitted to the NRC by the 60 Day Due Date.
- Attach additional pages, TWRs, or other documentation as necessary.
12/01/2003 MON 14:48 [TX/RX NO 93611 001