ML17291A235

Deficiency Rept Re Material Defects in Facility Containment Penetration Modules.Initially Reported on 940715.Modules Were Replaced

ML17291A235
Person / Time
Site:	Columbia
Issue date:	07/15/1994
From:	WASHINGTON PUBLIC POWER SUPPLY SYSTEM
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
NUDOCS 9407210170
Download: ML17291A235 (5)

Text

(ACCELERATED RIDS PROCESSING)y REGULATORY INFORMATION DISTRIBUTION SYSTEM (RIDS)ACCESSION NBR:9407210170 DOC.DATE: 94/07/15 NOTARIZED:

NO DOCKET g FACIL:50-397 WPPSS Nuclear Project, Unit 2, Washington Public Powe 05000397 AUTH.NAME AUTHOR AFFILIATION

• Washington Public Power Supply System RECIP.NAME

.RECIPIENT AFFXLIATXON Document Control Branch (Document Control Desk)

SUBJECT:

Deficiency rept re material defects in facility containment penetration modules.Xnitially reported on 940715.Modules were replaced.DISTRIBUTION CODE: IE19D COPIES RECEXVED:LTR ENCL SIZE: TITLE: Part 21 Rept (50 DKT)NOTES: RECIPIENT XD CODE/NAME PDIV-3 PD INTERNAL: AEOD/g)SP/ROAB CE~RGN3 RGN5 EXTERNAL: INPO RECORD CTR'SIC SILVER,E COPXES LTTR ENCL 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 RECXPIENT XD CODE/NAME CLIFFORD,J NRR/DRI L/RVI B RES/DSIR/EIB RGN2 RGN4 SECY/PDR NRC PDR COPIES LTTR ENCL 1 1 1 1 1.1 1 1 1 1 1 1 1 1 NOTE TO ALL"RIDS" RECIPIENTS:

PLEASE HELP US TO REDUCE WASTE!CONTACT THE DOCUMENT CONTROL DESK, ROO!iI Pl-37 (EXT.504-2083)TO ELIM!NATE YOUR NAME FROM DISTRIBUTION LISTS I OR DOCUMENTS YOU DON"I'LED!TOTAL NUMBER OF COPIES REQUIRED: KTTR 15 ENCL 15 t I I

>JUL-15-1994 12:44+PSS 589 377 4317 P.82i82 July 15, 1994 Docket No.50-397 Document Control Desk U.S.Nuclear Regulatory Commission Washington, D.C.20555 Subject NUCLEAR PLANT WNP-2, OPERATING LICENSE NPF-21 XOCFR21 REPORT WESTINGHOUSE CONTAI5MKÃT PIWETRATION MODULES.SCOTCHCAST SOU,IN RELIEF AND VARGLAS INSULATED CONDUCTORS This is an initial 10CFR21 notification to the NRC Operations Center.On May 9, 1994, investigation into electrical problems (open wires and low resistance) for the Rod Position Indication System (RPIS)at WNP-2 identified a degraded condition due to corrosion of conductors internal to the strain relief material in primary containment electrical penetration modules.The penetration modules provide both electrical continuity and containment integrity functions.

The degraded condition potentially affects electrical continuity but not containment integrity.

The design and construction of the RPIS penetration module are similar to safety related modules.Initial operability assessments limit this problem to the RPIS modules.Six of the 12 RPIS modules have been replaced during this refueling outage (R-9).The remaining RPIS modules which are not replaced are operable.Containment penetration modules were supplied by Westinghouse and installed in WNP-2 during initial construction.

Imaging and Sensing Technology (IST)purchased the manufacturing facility for the modules from Westinghouse in May 1988.The IST contact is: Phil Ponzi, Chairman Imaging and Sensing Technology 300 Westinghouse Circle Horseheads, NY 14845 (607)796-4433 The Westinghouse contact is: R.B.Miller, Engineer, Nuclear Safety Department Westinghouse Electric Corp., Energy Systems Business Unit Energy Center Pittsburgh, PA 15230 (412)374-5953 Westinghouse/IST indicate that they have informed the only other domestic utility to which penettations containing Scotchcast have been supplied of the presence of Scothcast in one of their modules.The module uses insulated and jacketed cable but not Varglas.The utility informed the vendor that they have not had any problems with the module.If the identified condition had gone undetected in certain safety related applications, it could have resulted in a substantial safety hazard due to the loss of electrical continuity.

Should you have any questions or desire additional information, please caQ me or D.A.Swank at (509)377-4563;I 9407210170 940715 PDR ADOCK 05000397 PDR TOTAL P 82 POWER REACTOR-EVENT NUMBER: 27541 FACILITY: WASHINGTON NUCLEAR UNIT:[2][][]RX TYPE:[2]GE-5 NRC NOTIFIED BY: FASCXMILE HQ OPS OFFICER: THOMAS ANDREWS REGION: 4 STATE: WA NOTIFICATION DATE: 07/15/94 NOTIFICATION TIME: 20:51[ET]EVENT DATE: 07/15/94 EVENT TIME: 00:00[PDT]

LAST UPDATE DATE: 07/15/94 NOTIFICATIONS EMERGENCY CLASS: NOT APPLICABLE 10 CFR SECTION: CCCC 21.21 UNSPECIFIED PARAGRAPH UNIT SCRAM CODE RX CRIT INIT PWR INIT RX MODE CURR PWR CURR RX MODE EVENT TEXT MATERIAL DEFECTS IN WESTINGHOUSE CONTAINMENT PENETRATION MODULES THIS IS AN INTIAL 10CFR21 NOTIFICATION TO THE NRC OPERATIONS CENTER.ON MAY 9, 1994, INVESTIGATXON INTO ELECTRICAL PROBLEMS (OPEN WIRES AND LOW RESISTANCE)

FOR THE ROD POSITXON INDICATION SYSTEM (RPIS)AT WNP-2 IDENTIFXED A DEGRADED CONDITION DUE TO CORROSION OF CONDUCTORS INTERNAL TO THE STRAIN RELIEF MATERXAL IN PRXMARY CONTAINMENT ELECTRICAL PENETRATION MODULES.THE PENETRATION MODULES PROVIDE BOTH THE ELECTRICAL CONTINUITY AND CONTAINMENT INTEGRITY FUNCTIONS.

THE DEGRADED CONDITION POTENTXALLY AFFECTS ELECTRICAL CONTINUITY BUT NOT CONTAINMENT INTEGRITY.

THE DESIGN AND CONSTRUCTXON OF THE RPIS PENETRATION MODULE ARE SIMILAR TO SAFETY RELATED MODULES.INITIAL OPERABILITY ASSESSMENTS LXMIT THIS PROBLEM TO THE RPIS MODULES.SIX OF THE 12 RPIS MODULES HAVE BEEN REPLACED DURXNG THIS REFUELING OUTAGE (R-9).THE REMAINING RPIS MODULES WHICH ARE NOT REPLACED ARE OPERABLE.CONTAXNMENT PENETRATION MODULES WERE SUPPLIED BY WESTINGHOUSE AND INSTALLED IN WNP-2 DURING INITIAL CONSTRUCTION.

IMAGING AND SENSING TECNOLOGY (IST)PURCHASED THE MANUFACTURING FACILITY FOR THE MODULES FROM WESTINGHOUSE IN MAY 1988.THE IST CONTACT IS: PHIL PONZI, CHAIRMAN IMAGING AND SENSING TECHNOLOGY 300 WESTINGHOUSE CXRCLE (Continued on next page)

FACILITY: WASHINGTON NUCLEAR HORSEHEABS', NY 14845 (607)796-4433 THE WESTINGHOUSE CONTACT IS: PAGE g 2 OF EVENT NUMBER: 27541 R B M I LLER~ENGINEER NUCLEAR SAFETY DEPARTMENT WESTINGHOUS ELECTRIC CORP., ENERGY SYSTEMS BUSINESS UNIT ENERGY CENTER PITTSBURG, PA 15230 (412)374-5953 WESTINGHOUSE/IST INDICATE THAT THEY HAVE INFORMED THE ONLY OTHER DOMESTIC UTILITY TO WHICH PENETRATIONS CONTAINING SCOTCHCAST HAVE BEEN SUPPLIED OF THE PRESSENCE SCOTCHCAST IN ONE OF THEIR MODULES.THE MODULE USES INSULATED AND JACKETED"CABLE BUT NOT VARGLAS.THE UTILITY INFORMED THE VENDOR THAT THEY HAVE NOT HAD ANY PROBLEMS WITH THE MODULE.IF THE IDENTIFIED CONDITION HAD GONE UNDETECTED IN CERTAIN SAFETY RELATED APPLICATIONS, IT COULD HAVE RESULTED IN A SUBSTANTIAL SAFETY HAZARD DUE TO THE LOSS OF ELECTRICAL CONTINUITY.