ML17303B026

Special Rept 1-SR-88-004:on 880407,loose Part Detection Instrumentation Declared Inoperable for More than 30 Days. Caused by Breakup of Signal Coming from Sensor.Work Control Document Prepared & Will Be Scheduled for Next Outage

ML17303B026
Person / Time
Site:	Palo Verde
Issue date:	04/12/1988
From:	Haynes J ARIZONA PUBLIC SERVICE CO. (FORMERLY ARIZONA NUCLEAR
To:	NRC OFFICE OF ADMINISTRATION & RESOURCES MANAGEMENT (ARM)
References
1-SR-88-004, 1-SR-88-4, 192-00365-JGH-T, 192-365-JGH-T, NUDOCS 8804190029
Download: ML17303B026 (4)

Text

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~g CEZZRATZD M JBUTION DEMONS QON SYSTEM REGULATORY INFORMATION DISTRIBUTION SYSTEM (RIDS)

ACCESSION NBR:8804190029 DOC.DATE: 88/04/12 NOTARIZED: NO DOCKET FACIL:STN-50-528 Palo Verde Nuclear Station, Unit 1, Arizona Publi 05000528 AUTH. NAME AUTHOR AFFILIATION HAYNES,J.G. Arizona Nuclear Power Project (formerly Arizona Public Serv RECIP.NAME RECIPIENT AFFILIATION Document Control Branch (Document Control Desk)

SUBJECT:

Special Rept 1-SR-88-004:on 880407,loose part detection instrumentation inoperable for more than 30 days.

DISTRIBUTION CODE: IE22D COPIES RECEIVED:LTR ENCL SIZE:

TITLE: 50.73 Licensee Event Report (LER), Incident Rpt, etc.

NOTES:Standardized plant. 05000528 ~

RECIPIENT COPIES RECIPIENT COPIES ID CODE/NAME LTTR ENCL ID CODE/NAME LTTR ENCL PD5 LA 1 1 PD5 PD 1 1 LICITRA,E 1 1 DAVIS,M 1 1 INTERNAL: ACRS MICHELSON 1 1 ACRS MOELLER 2 2 AEOD/DOA 1 1 AEOD/DSP/NAS 1 1 AEOD/DSP/ROAB 2 2 AEOD/DSP/TPAB 1 1 ARM/DCTS/DAB 1 1 DEDRO 1 1 NRR/DEST/ADS 7E 1 0 NRR/DEST/CEB 8H. 1 1 NRR/DEST/ESB 8D 1 1 NRR/DEST/ICSB 7 1 1 NRR/DEST/MEB 9H 1 1 NRR/DEST/MTB 9H 1 1 NRR/DEST/PSB 8D 1 1 NRR/DEST/RSB 8E 1 1 NRR/DEST/SGB 8D 1 1 NRR/DLPQ/HFB 10 1 1 NRR/DLPQ/QAB 10 1 1 NRR/DOEA/EAB 11 1 1 NRR/DREP/RAB 10 1 1 NRR/DREP/RPB 10 2 2 REG FIL SfDE" S SIB 9A 02 1,1 1

1 1

1 NRR/PMAS/ILRB12 RES TELFORD,J RES/DRPS DIR 1

1 1

1 1

1 RGN5 FILE 01 1 1 EXTERNAL: EGG(G GROH, M 4 4 FORD BLDG HOY,A 1 1 H ST LOBBY WARD 1 1 LPDR 1 1 NRC PDR 1 1 NSIC HARRIS,J 1 1 NSIC MAYS,G 1 1 NOTES 1 1 S

A D

'D TOTAL NUMBER OF COPIES REQUIRED: LTTR 47 ENCL 46

Arizona Nuclear Power Project P.O. BOX 52034 ~ PHOENIX. ARIZONA 85072-2034 192-00365-JGH/TDS/JEN April 12, 1988 U. S. Nuclear Regulatory Commission NRC Document Control Desk Washington, D.C. 20555

Subject:

Palo Verde Nuclear Generating Station (PVNGS)

Unit 1 Docket No. STN 50-528 (License No. NPF-41)

Special Report 1-SR-88-004

.File: 88-020-404 Attached please find Special Report 1-SR-88-004 prepared and submitted pursuant to Technical Specification 3.3.3.7 ACTION a and Technical Specification 6.9.2. This report discusses the loose-part detection instrumentation being inoperable for more than 30 days.

If you have any questions,'lease contact T. D. Shriver, Compliance flanager at (602) 393-2521.

Very trul yours, J. G. Hay es Vice President Nuclear Production JGH/TDS/JEH/kj Attachment cc: 0. H. Def1ichele (all w/a)

E. E. Van Brunt, Jr.

J. B. Har tin T. J. Polich E. A. Licitra A. C. Gehr INPO Records Center 8804190029 8804i2 PDR ADOCK 05000528 DCD,.

PALO VERDE NUCLEAR GENERATING STATION LOOSE-PART DETECTION INSTRUHENTATION License No. NPF-41 Docket No. 50-528 Special Report No. 1-SR-88-004 This Special Report is being submitted pursuant to Technical Specification 3.3.3.7 ACTION "a" and Technical Specification 6.9.2'addressing the loose-part detection instrumentation being inoperable for more than 30 days. The 30 day period for returning the system to an operable status was exceeded at approximately 0010 HST on April 7, 1988.

Palo Verde Unit 1 entered Hode 2 (STARTUP) at approximately 0010 HST on Harch 8, 1988 upon completion of its first refueling outage. The inoperable portion

'of the loose-part detection instrumentation is in the circuitry associated with instrument number JSVNYE-2, which is located on the upper reactor vessel head. The inoperable status is caused by a break-up of the signal coming from the sensor.

The sensor and the hardline cable had been replaced as discussed in letter ANPP-36011-EEVB/KLH-98.05, E. E. Van Brunt, Jr. to Director of Nuclear Reactor Regulation, dated April 9, 1986. Surveillance Test 36ST-9SV02 (Vibration and Loose Parts Honitoring System Calibration Test) was performed satisfactorily on loose-part detection instrumentation in January, 1988. The reactor vessel head was removed for inspection and maintenance and reinstalled in February, 1988. On triarch 4, 1988 the loose-part detection instrumentation channel 2 problem was identified and is believed to be. either the sensor or the cable although an exact root cause has not been determined.

An authorized work control document has been prepared and will be scheduled for the next outage of sufficient duration.