ML17289A600

Special Rept:On 920420,seismic Triaxial Peak Accelerograph & Space Frame Removed to Allow Refueling of Reactor Core. Accelerometer Will Be Returned to Svc When Space Frame Reattached to Reactor Vessel Prior to Startup

ML17289A600
Person / Time
Site:	Columbia
Issue date:	05/22/1992
From:	John Baker WASHINGTON PUBLIC POWER SUPPLY SYSTEM
To:	Martin J NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V)
References
GO2-92-129, NUDOCS 9206080117
Download: ML17289A600 (5)

Text

ACCELERATED DI'RTMBUTION DEMONS+ATION SYSTEM REGULATORY XNFORMATION DISTRIBUTION SYSTEM (RIDS)ACCESSION NBR:9206080117 DOC.DATE-92/05/22 NOTARIZED:

NO DOCKET FACIL:50-397 WPPSS Nuclear Project, Unit 2, Wash'ington Public Powe 05000397 AUTH.NAME AUTHOR AFFILIATION BAKER,J.W.

Washington Public Power Supply System RECIP.NAME RECIPIENT AFFILIATION MARTIN,J.B.

Region 5 (Post 820201)

SUBJECT:

Special rept:on 920420,seismic triaxial peak accelerograph

&space frame removed to allow refueling of reactor core.Accelerometer will be returned to svc when space frame reattached to reactor vessel prior to startup.DISTRIBUTION CODE IE22D COPIES RECEIVED:LTR J ENCL 0 SIZE: TXTLE: 50.73/50.9 Licensee Event Report (LER), Incident Rpt, etc.NOTES: D" A RECIPIENT ID CODE/NAME PD5 LA DEAN,W.INTERNAL: ACNW AEOD/DOA AEOD/ROAB/DSP NRR/DLPQ/LHFB10 NRR/DOEA/OEAB NRR/DST/SELB 8D JAR/B~SPLBSDI

'RE~E 02 RGN5 FILE 01 EXTERNAL: EG&G BRYCE,J.H NRC PDR NSIC POOREFW COPIES LTTR ENCL 2 1 2 1 1 1 1 1 1 1 3 3 1 1 RECIPIENT ID CODE/NAME PD5 PD ACRS AEOD/DS P/TPAB NRR/DET/EMEB 7E NRR/DLPQ/LPEB10 NRR/DREP/PRPB1 1 NRR/DST/SICB8H3 NRR/DST/SRXB 8E RES/DSIR/EIB L ST LOBBY WARD NSIC MURPHY,G.A NUDOCS FULL TXT-COPIES LTTR ENCL 2 1 1 1 2 1 1 1 D D D NOTE TO ALL"RIDS" RECIPIENTS:

PLEASE HELP US TO REDUCE WASTE!CONTACT THE DOCUMENT CONTROL DESK, ROOiVI Pl-37 (EXT.20079)TO ELIMINATE YOUR NAME FROiVI DISTRIBUTION LISTS FOR DOCUMENTS YOU DON'T NEED!TOTAL NUMBER OF COPIES REQUIRED: LTTR 32 ENCL~8 D D

WASHINGTON PUBLIC POWER SUPPLY SYSTEM NPQ P.O.Bm 988~3000 George Wasbbrgton Way~RlobEand, Washington 99352~~f~g f2$+Op g g 8 Hay 22, 1992 G02-92-129 BEG10N V Docket No.50-397 Hr.J.B.Hartin Regional Administrator U.S.Nuclear Regulatory Commission Reg'.on V 1450 Maria Lane, Suite 210 Walnut Creek, CA.94596

Subject:

NUCLEAR PLANT NO.2, LICENSE NO.NPF-21 SPECIAL REPORT: SEISMIC MONITORING INSTRUMENTATION This report is submitted pursuant to the requirements of WNP-2 Technical Specification section 3.3.7.2"Seismic Ho'nitoring Instrumentation" which requires the instruments to be operable at all times'.The Seismic Monitoring System has been designed and installed to record the response of Plant buildings and systems to ground motions produced by earthquakes.

This information would be used by plant operators to immediately gauge the relative size of the, event and, over the long term, to verify the performance of plant design.The action statement for this specification requires that"with one or more of the above required seismic monitoring instruments inoperable for more than 30 days, in lieu of any.other report required by Specification 6.9.1, prepare and submit a Special Report to the Commission pursuant to Specification 6.9.2 wi.thin the next=10 days outlining the cause of tne malfunction and the plans for restoring the instrument(s) to operable status." On April 20, 1992 with the plant in Mode 4 (cold shutdown)during the extended maintenance outage the seismic Triaxial Peak Accelerograph (SEIS-TPA-1) and the Space Frame were removed to allow for refueling of the reactor core.'he Space Frame is a structural frame over the RPV head used to support RCIC piping, CRA ventilation ducting, RPV head/flange thermocouples, and one RPV.level instrument sensing line.This seismic accelerometer is a mechanical device that is attached to the Reactor Space Frame.It records seismic activity by producing scratches on metal record plates.To obtain the recorded data the mechanical record plates must be removed and the scratches measured with a magnifying optical device.There are no alarms or automatic actuations produced by this instrument.

9206080ll7'20522 PDR ADOCK 05000397 8 PDR

Page Two SPECIAL REPORT: SEISMIC MONITORING INSTRUMENTATION The seismic system design requires removing SEIS-TPA-1 from service to allow for refueling of the reactor core.This is completed during our annual maintenance outage and requires the Space Frame and thus the SEIS-TPA-1 to be removed for more than thirty days.Our Space Frame removal procedures require notification of'the Shift Manager to enter a Seismic Monitoring System LCO when the Space Frame is removed.The Triaxial Peak Accelerometer will be returned to service when the Space Frame is reattached to the Reactor Vessel prior to Reactor Startup from this annual maintenance outage.The Supply System plans to apply for a Technical Specification Change to move the accelerometer outside the Drywell so that entering an LCO will not be necessary.

S'ely, J.Baker (H/D 927M)P-2 Plant Manager CC: NRC Document Control Desk Hr.C.Sorenson, NRC Resident Inspector-(H/D 901A)INPO Records Center-Atlanta, GA Hs.Dottie Sherman, ANI Hr.D.L.Williams, BPA (H/D 399)Hr.W.H.Dean-NRC