ML17304A219

Special Rept 3-SR-88-001:on 880516,radiation Monitoring Unit Inoperable for Greater than 72 H.Caused by Flow Totalizer Exhibiting Offset W/No Flow Through Monitor.Flow Transducer & Totalizer Replaced.Request for Evaluation Submitted

ML17304A219
Person / Time
Site:	Palo Verde
Issue date:	06/15/1988
From:	Haynes J ARIZONA PUBLIC SERVICE CO. (FORMERLY ARIZONA NUCLEAR
To:	NRC OFFICE OF ADMINISTRATION & RESOURCES MANAGEMENT (ARM)
References
192-00384-JGH-T, 192-384-JGH-T, 3-SR-88-001, 3-SR-88-1, NUDOCS 8806230096
Download: ML17304A219 (6)

Text

1 pt ACCELERATED DI i IBUTJON DEMONSTRA, ON SYSTEM

%II REGULATORY INFORMATION DISTRIBUTION SYSTEM (RIDS)

ACCESSION NBR:8806230096 DOC.DATE: 88/06/15 NOTARIZED: NO DOCKET FACIL:STN-50-530 Palo Verde Nuclear Station, Unit 3, Arizona Publi 05000530 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)

Special rept: on 880516,radiation monitoring unit inoperable i

SUBJECT:

for greater than 72 h.

DISTRIBUTION CODE: IE22D COPIES RECEIVED:LTR ENCL TITLE: 50.73 Licensee Event -Report (LER), Incident Rpt, etc.

L SIZE:

D NOTES:Standardized plant. 05000530 S

RECIPIENT COPIES RECIPIENT I COPIES ID CODE/NAME LTTR ENCL ID CODE/NAME LTTR ENCL PD5 LA 1 1 PD5 PD 1 1 A 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/DS P/ROAB 2 2 AEOD/DSP/TPAB 1 1 ARM/DCTS/DAB 1 1 DEDRO 1 1 NRR/DE ST/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

- &/SIB 9A 1 1 NUDOCS-ABSTRACT 1 1 G~Q& 02 1 1 RES TELFORD,J 1 1 S/DE/EIB 1 1 RES/DRPS DEPY 1 1 RGN5 FILE 01 1 1

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EXTERNAL: EG&G WILLIAMS,S 4 4 FORD BLDG HOY,A.

H ST LOBBY WARD 1 1 LPDR 1 NRC PDR 1 1 NSIC HARRIS,J 1 NSIC MAYS,G

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1 NOTES: 1 1 A

TOTAL NUMBER OF COPIES REQUIRED: LTTR 47 ENCL 46

l Arizona Nucfear Power Project P.O. BOX 52034 ~ PHOENIX. ARIZONA85072-2034 192-00384-JGH/TDS/DAJ June 15, 1988 U. S. Nuclear Regulatory Commission NRC Document Control Desk Washington, D.C. 20555

Subject:

Palo Verde Nuclear Generating Station (PVNGS)

Unit 3 Docket No. STN 50-530 (License No. NPF-74)

Special Report 3-SR-88-001 File: 88-020-404 Attached please find Special Report 3-SR-88-001 prepared and submitted pursuant to Technical Specifications 3.3.3. 1 and 6.9.2. This report discusses an inoperable Containment Building Atmosphere Monitor.

If you have any questions, please contact T. D. Shriver, Compliance Manager at (602) 393-2521.

Very tr ly yours, u'<

J. G. Haynes Vice President Nuclear Production JGH/TDS/DAJ/kj Attachment cc: D. B. Karner (all w/a)

J. B. Martin T. J. Polich E. A. Licitra A. C. Gehr INPO Records Center

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8806230096 880m>5 DR AOOC<

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0 PALO VERDE NUCLEAR GENERATING STATION Radiation Monitoring Unit Inoperable for Greater Than 72 Hours License No. NPF-74 Docket No. STN 50-530 Special Report No; 3-SR-88-001 This Special Report is being submitted pursuant to Technical Specification 3.3.3. 1 ACTION 27 and Technical Specification 6.9.2 to report an event in which a Radioactive Particulate/Gaseous Process Monitor (Containment Building Atmosphere Monitor, RU-1) was inoperable for greater than 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br />. The 72 hour8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> limit for returning the monitor to operability was exceeded at approximately 0100 HST on Hay 19, 1988. The substitute monitor for RU-1 (RU-52) was placed in service prior to removing RU-1 From service fulfilling the requirements of Technical Specification 3.3.3. 1 ACTION 27.

At approximately 0100 HST on May 16, 1988, Palo Verde Unit 3 was in Mode 1 (POllER OPERATION) at approximately 100 percent power when the Containment Building Atmosphere Monitor (RU-1) was declared inoperable for the performance of Surveillance Test 36ST-9S(05, "Radiation Monitoring Calibration Test for Baseline Process Monitors." During the performance of the surveillance test, it was discovered that the flow totalizer exhibited an offset with no flow through the monitor.

An authorized work document was issued to troubleshoot/rework/replace components as necessary to correct the problem identified during the surveillance test. During troubleshooting it was identified that a flow transducer was not operating properly. The flow transducer and flow totalizer were replaced, and it was verified that RU-1 operated properly. An Engineering Evaluation Request has been submitted to perform a root cause of.

failure analysis on the malfunctioning components.

After satisfactory completion of 36ST-9S(05, RU-1 was returned to service at approximately 1509 HST on Hay 20, 1988. The monitor was inoperable for approximately four days and fourteen hours.

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