ML17313A520

LER 98-004-00:on 980630,personnel Discovered That Pressure Safety Valve Had Not Received Periodic Set Pressure Test for ASME Class 1 Pressure Safety Valve.Caused by Personnel Error.Pressure Safety Valve reviewed.W/980730 Ltr

ML17313A520
Person / Time
Site:	Palo Verde
Issue date:	07/30/1998
From:	Marks D, Overbeck G ARIZONA PUBLIC SERVICE CO. (FORMERLY ARIZONA NUCLEAR
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
192-01024-GRO-D, 192-1024-GRO-D, LER-98-004-01, LER-98-4-1, NUDOCS 9808050086
Download: ML17313A520 (14)

Text

CATEGORY REGULA RY INFORMATION DISTRIBUT1 SYSTEM (RIDS)ACCESSION NBR:9808050086

.DOC.DATE: 98/07/30 NOTARIZED:

NO'OCKET¹FACIL:STN-50-529 Palo Verde Nuclear Station, Unit 2, Arizona Publi 05000529 AUTH NAME AUTHOR AFFILIATION MARKS,D.G.

Arizona Public Service Co.(formerly'Arizona Nuclear Power OVERBECK,G.R.

Arizona Public Service Co.(formerly Arizona Nuclear Power RECIP.NAME RECIPIENT AFFILIATION

SUBJECT:

LER 98-004-00:on 980630,personnel discovered that pressure sa&ty valve had not received periodic set pressure test for ASME Class 1 pressure safety valve.Caused by personnel error.Pressure safety valve reviewed.W/980730 ltr.DISTRIBUTION CODE: IE22T COPIES RECEIVED:LTR ENCL SIZE: TITLE: 50.73/50.9 Licensee Event Report (LER), Incident Rpt, etc.E NOTES:Standardized plant.05000529@RECIPIENT ID CODE/NAME PD4-2 PD INTERNAL: ACRS AEOD/SPD/RRAB NRR/DE/ECGB NRR/DE/EMEB NRR/DRCH/HOHB NRR/DRPM/PECB RES/DET/EIB EXTERNAL: L ST LOBBY WARD NOAC POORE,W.NRC PDR COPIES LTTR ENCL 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1.1 1 1 RECIPIENT ID CODE/NAME FIELDS,M NRR/DE/EELB NRR/DRCH/HICB NRR/DRCH/HQMB NRR/DSSA/SPLB RGN4 FILE 01 LITCO BRYCE,J H NOAC QUEENER,DS NUDOCS FULL TXT COPIES LTTR ENCL 1 1 2 2 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 D U N NOTE TO ALL"RIDS" RECIPIENTS:

PLEASE HELP US TO REDUCE WASTE.TO HAVE YOUR NAME OR ORGANIZATION REMOVED FROM DISTRIBUTION LISTS OR REDUCE THE NUMBER OF COPIES RECEIVED BY YOU OR YOUR ORGANIZATION, CONTACT, THE DOCUMENT CONTROL DESK (DCD)ON EXTENSION 415-2083 FULL TEXT CONVERSION REQUIRED TOTAL NUMBER OF COPIES REQUIRED: LTTR 23 ENCL 23 I e

'ommitment.

/nnnrnttnn.

Energy.Palo Verde Nuclear Generating Station Gregg R.Overbeck Vice President Nuclear Production TEL 602/393-5148 FAX 602/3934077 Mail Station 7602 P.O.Box 52034 Phoenix, AZ 85072-2034 192-01024-GRO/DGM/R JH July 30, 1998 U.S.Nuclear Regulatory Commission ATTN: Document Control Desk Mail Station P1-37 Washington, D.C.20555-0001

Subject:

Palo Verde Nuclear Generating Station (PVNGS)Unit 2 Docket No.STN 50-529 License No.NPF-51 Licensee Event Report 98-004-00 Attached please find Licensee Event Report (LER)98-004-00 prepared and submitted pursuant to 10 CFR 50.73.This LER reports a Technical Specification (TS)violation due to exceeding the surveillance testing interval for an ASME Class 1 pressure safety valve'or the safety injection system.In accordance with 10CFR50.73(d), a copy of this LER is being forwarded to the Regional Administrator, NRC Region IV.If you have any questions, please contact Daniel G.Marks, Section Leader, Regulatory Affairs, at (602)393-6492.Sincerely,.gA.C8 r GRO/DGM/RJH/rlh Attachment cc: E.W.Merschoff P.H.Harrell J.H.Moorman INPO Records Center'808050086 980730 PDR.ADQCK 05000529 8', PDR (all with attachment) l f I LICENSEE EVENT REPORT (L)FACILITY NAME (1)DOCKET NUMBER(2)PAGE (3)Palo Verde Unit 2.0 5 0 0 0 5 2 9 1oF05 TLE (4)Missed TS 4.0.5 Surveillance Requirement for ASME Safety injection Pressure Safety Valve EVENT DATE 6 MONTH OAY YEAR YEAR LERNUMBER 6)SEQUENTIAL NUMBER REVISION NUMBER REPORT DATE 7 OAY YEAR MONTH OTHER FACIUTIES INVOLVED 6 KET NUMBERS FACIUTY NAMES 0 6 3 0 9 8 9 8-0 0 4-0 0 0 7 3 0 9 8 ltl/A 0 5 0 0 0 0 5 0 0 0 OPERATING HIS REPORT IS SUBMITTED PURSUANT TO THE REQUIREMENTS OF 10 CFR q (Check one or more of the following)

(11)MODE (9)1 POWER LEVEL(to)1 P P 20.402(b)20.405(s)(1/I) 20.405(aX1)(ii) 20.405(a)(1)gi) 20.405(a)(1)(iv) 20.405(s)(1)(v) 20.405(c)50.36(c)(1) 50.36(c)(2) 50.73(sX2XI) 50.73(s)(2)(6) 50.73(a)(2Xai)

LICENSEE CONTACT FOR THIS LER (12)50.73(aX2Xtv) 50.73(a)(2)(v) 50.73(s)(2)(vg) 50.73(a)(2)(vis)(A) 50.73(s)(2XriiiXB) 50.73(a)(2/x) 73.71(b)73.71(c)OTHER (Specify in Abstract bebw and in Text, NRC Form Daniel G.Marks, Section Leader, Regulatory Affairs ELEPHONE NUMBER EA CODE 6 0 2 3 9 3-6 4 9 2 COMPLETE ONE LINE FOR EACH COMPONENT FAILURE DESCRIBED IN THIS REPOR T (13)CAUSE SYSTEM COMPONENT I MANUFAC-TURER REPORTABLE TO NPRDS CAUSE SYSTEM COMPONENT MANUFAG TURER REPORTABLE vv TO NPRDS SUPPLEMENTAI.

REPORT EXPECTED (14)X NO S (If yes, ccmplete EXPECTED SUBMISSION DATE)EXPECTED SUBMISSION DATE (15)MONTH OAY YEAR BsTRAGT(Uma to 1400 spaces, Le~spproxsnatety fsteen sngiespace typewnnen Ines)(16)On June 30, 1998, at approximately 1330 MST, Palo Verde Unit 2 was in Mode 1 (POWER OPERATION), operating at approximately 100 percent power when APS Engineering personnel discovered that pressure safety valve (PSV)(2JSIAPSV469) had not received the periodic (5 year)set pressure test for an ASME Class 1 PSV as required by Surveillance Requirement (SR)4.0.5.The omission was discovered during a transportability review of a similar condition in Unit 3.The periodic test for this valve was required to be complete by February 18, 1998.On July 1, 1998 pressure testing of this valve was satisfactorily completed as required by TS SR 4.0.5.The cause of the event was attributed to personnel error.Review of the pump and valve testing program procedure revealed that this valve was correctly identified as a Class 1 valve but incorrectly specified the test frequency as 10 years.The set pressure testing schedules for the remaining PSVs were reviewed for all three units and concluded that all other testing was performed at the required frequencies.

A previous similar event was reported under LER 50/528-97-006-00.

LICENSEE EVENT REPORT (LER)TEXT CONTINUATION FACILITY NAME Palo Verde Unit 2 DOCKETNUMBER LER NUMBER SEQUENTIAL REVISION NUMBER NUMBER PAGE EXT 1.REPORTING REQUIREMENT:

0 5 0 0 0 5 2 9 9 8-0 0 4-0 0 0 2 of 0 5 This LER 529/98-004-00 is being written to report an event that resulted in an operation or condition prohibited by the plant's Technical Specifications (TS)as specified in 10 CFR 50'3(a)(2)(i)(B).

Specifically, at approximately 0938 MST on June 30, 1998, Palo Verde Unit 2 was in Mode 1 (POWER OPERATION), operating at approximately 100 percent power when control room personnel (utility-licensed operator)had entered (LCO)3.7.11 ACTION A and (LCO)3.3.3.5 ACTION B to declare Shutdown Cooling (BP)Train"B" inoperable to allow maintenance to be performed on 2JSIBPSV0755(PCV) pressure relief valve and 2JSIBUV652 (ISV)Shutdown Cooling isolation valve.At approximately 1330 MST on June 30, 1998, APS Engineering personnel discovered that pressure safety valve (PCV)(2JSIAPSV469) had not received the periodic (5 year)set pressure test for an ASME Class 1 PSV as required by Surveillance Requirement (SR)4.0.5.Control Room personnel entered TS Limiting Condition for Operation (LCO), 3.7.11 ACTION B and declared Shutdown Cooling Train"A" inoperable.

Subsequently, control room personnel invoked Surveillance Requirement 4.0.3 which allowed delaying the ACTION B requirements of LCO 3.7.11 for 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />.All operator actions were appropriately entered into the Unit log.At approximately 1632 MST on June 30, 1998 maintenance activities were completed and control room personnel declared Shutdown Cooling Train"B" operable and transitioned from ACTION B to ACTION A of LCO 3.7.11 and Shutdown Cooling Train"A" remained, inoperable.

TS Surveillance Requirement (SR)4.0.5 requires testing'of ASME Code Class 1,2, and 3 component's in accordance with each applicable specified interval.The'testing for PSV (2JSIAPSV469) was required to be completed on February 18, 1998 but was not completed until July 1, 1998.

I I l LICENSEE EVENT REPORT (LER)TEXT CONTINUATION FACILITY NAME Palo Verde Unit 2 DOCKET NUMBER SEOUENTIAL REVISION NUMBER NUMBER LER NUMBER YEA PAGE EXT 0 5 0 0 0 5 2 9 9 8-0 0 4-0 0 030f 0 5 EVENT DESCRIPTION:

On June 30, 1998, at approximately 1330 MST, Palo Verde Unit 2 was in Mode 1 (POWER OPERATION), operating at approximately 100 percent power when APS Engineering personnel (other utility personnel) discovered that pressure safety valve 2JSIAPSV469 (PCV)had not received the periodic (5 year)set pressure test for an ASME Class 1 PSV as required by Surveillance Requirement (SR)4.0.5.The omission was discovered during a transportability review of a similar condition in Unit 3.The periodic test for this valve was required to be complete on February 18, 1998.On July 1, 1998 pressure testing of this valve was satisfactorily completed as required by TS SR 4.0.5.At the time of discovery, Unit 2 was in Mode 1 (POWER OPERATION), operating at approximately 100 percent power, control room personnel had previously entered (LCO)3.7.11 ACTION A and (LCO)3.3.3.5 ACTION B to declare Shutdown Cooling Train"B" inoperable to allow maintenance to be performed on pressure safety valve 2JSIBPSV755 (PCV)and Shutdown Cooling isolation valve 2JSIBUV652 (ISV)~On June 30, 1998 a CRDR was initiated to document the deficiency for Shutdown Cooling Train"A" and to determine reportability.

As a result of two trains of Shutdown Cooling being inoperable, control room personnel invoked Surv'eillance Requirement 4.0.3 which allowed delaying the ACTION B requirements of LCO 3.7.11 for 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />.At approximately 1632 MST on June 30, 1998 maintenance activities.were completed and control room personnel declared Shutdown Cooling Train"B" operable and transitioned from ACTION B to ACTION A of LCO 3.7.11 and Shutdown Cooling Train"A" remained inoperable.

Subsequent testing of PSV (2JSIAPSV469) was conducted on July 1, 1998 with satisfactory results.On July 2, 1998 at approximately 2115 MST Unit 2 control room personnel declared Shutdown Cooling Train"A" operable and exited ACTION A of LCO 3.7.11.At this time both trains of Shutdown Cooling were determined to be operable.There were no safety system'actuations and none were required.

gl LICENSEE EVENT REPORT (LER)TEXT CONTINUATION FACILITY NAME Palo Verde Unit 2 DOCKETNUMBER LER NUMBER SEQUENTIAL REVISION NUMBER NUMBER PAGE EXT 0 5 0 0 0 5 2 9 9 8-0 0 4-0 0 0 4 of 0 5 3.ASSESSMENT OF THE SAFETY CONSEQUENCES AND IMPLICATIONS OF THIS EVENT: The function of the PSV (2JSIAPSV469) is to act as a thermal relief valve to prevent a hydraulic lock on Shutdown Cooling isolation valve 2JSIAUV651 in the event of a high energy line break inside containment.

The satisfactory performance of the set pressure verification test demonstrated that PSV (2JSIAPSV469) would have performed its intended function and that system performance was,not compromised.

The event did not result in any challenges to the fission product, barriers or result in any release of radioactive materials.

There were no adverse safety consequences or implications as a result of this event.This event did not adversely affect the safe operation of the plant or health and safety of the public in that satisfactory testing of the subject PSV'emonstrated that the PSV would have performed its intended function.CAUSE OF THE EVENT: An independent investigation of this event is being conducted in accordance with the APS Corrective Action Program.A preliminary evaluation has determined that the apparent root cause is attributed to personnel error when Engineering (IST)failed to recognize that PSV (2JSIAPSV469) should have been scheduled as an ASME Class 1 valve.In addition, the station Pump and Valve In-service Testing Program Procedure component tables incorrectly identified the testing frequency for this valve as 10 years.At the time of discovery, plant documentation indicated that PSV (2JSIAPSV469) was last tested on November 21, 1991.The IST Program 73DP-'9XI02"Pump and Valve Inservice Testing Program," section 3.3.6 requires that PSVs be tested in accordance with ASME/ANSI OM-1987 Part 1 (OM-1).OM-1 Section 1.3.3(b)identifies the test frequency for Class 1 PSVs as: "All valves of each type and manufacture shall be tested within each subsequent 5 year period with a minimum of 20%of the valves tested within any 24 months.The 20%shall be pre'viously untested valves if they exist." If the final evaluation results differ from this determination, a supplement to this report will be submitted to describe the final root cause determination.

No unusual characteristics of the work location (e.g., noise, heat, poor lighting)directly contributed to this event.

t I il LICENSEE EVENT REPORT (LER)TEXT CONTINUATION FACILITY NAME Palo Verde Unit 2 DOCKET NUMBER LER NUMBER SEQUENTIAL REVISION NUMBER NUMBER PAGE EXT 0 5 0 0 0 5 2 9 9 8-0 0 4-0 0 0 5 of 0 5 STRUCTURES, SYSTEMS, OR COMPONENTS INFORMATION:

There are no indications that any structures, systems, or components were inoperable at the start of the event,.which contributed, to the event.No component or system failures were involved.No failures of components with multiple functions were involved.No failures that rendered a train of a safety system inoperable were involved.6.CORRECTIVE ACTIONS TO PREVENT RECURRENCE:

An independent investigation of this event is being conducted in accordance with the APS Corrective Action Program.Actions to prevent recurrence included a transportability review of the PSVs set=pressure testing schedule for all three Units.Subsequent pressure testing for PSV (2JSIAPSV469) was conducted on July 1, 1998 with satisfactory results indicating that the subject PSV would have performed it's intended function.Therefore, there were no safety consequences as a result of the missed surveillance requirement.

The IST Program 73DP-9XI02"Pump and Valve Inservice Testing Program" will be revised by August 28, 1998, to update the required testing frequencies for PSVs.An additional evaluation to address personnel error is being conducted in I accordance with the APS Corrective Action Program.7.PREVIOUS SIMILAR EVENTS: Although a previous'event, LER 50/528-97-006-00, was reported pursuant to 10 CFR 50.73 for missing a TS surveillance requirement, the 1997 event occurred subsequent to the missed testing periods reported in LER 50/529-98-004-00.

Therefore, the.corrective actions of the previous events would not have prevented this event.

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