ML17303B019

Special Rept 1-SR-88-002:on 880314,72 H Limit for Returning Containment Area Monitor to Svc Exceeded.Cause Undetermined. Containment Area Monitor RU-149 Not Returned to Operable Status Pending Evaluation of Data

ML17303B019
Person / Time
Site:	Palo Verde
Issue date:	04/08/1988
From:	Haynes J ARIZONA PUBLIC SERVICE CO. (FORMERLY ARIZONA NUCLEAR
To:	NRC OFFICE OF ADMINISTRATION & RESOURCES MANAGEMENT (ARM)
References
1-SR-88-002, 1-SR-88-2, 192-00362-JGH-T, 192-362-JGH-T, NUDOCS 8804140143
Download: ML17303B019 (5)

Text

ACSLERLTED DISTRIBUTION DEMONSTRATION SYSTEM REGULAT 'NFORMATION DISTR IBUTIO V'STEM (RIDS)

ACCESSION NBR: 8804140143 DOC. DATE: 88/04/08 NOTARIZED: NO DOCKET '0 FACIL: STN-50-529 Palo Verde Nuclear Stations Unit 2. Ari zona Pub li AUTH. NAME HAYNES'. G.'ri RECIP. NAME AUTHOR AFFILIATION zona Nuclear PoUjer ProJect (formerly Ari zona Public Serv RECIPIENT AFFILIATION 05000529 Document ContT ol Branch (Document Control Desk)

SUBJECT:

Special Rept 1-SR-88-002: on 880314'2 h limit for returning containment area monitor to svc exceeded.

R DISTRIBUTION CODE: IE22D COPIES RECEIVED: LTR ENCL SIZE:

TITLE: 50. 73 Licensee Event Report (LER>i Incident Rpti etc.

NOTES: Standardized plant. OSOOOS 9 RECIPIENT ID CODE/NAME PD5 LA LICITRAiE COPIES LTTR ENCL 1 1 1

REC IP I ENT ID CODE/NAME PD5 PD DAVISi M COPIES LTTR ENCL 1

1 1

1 j

A INTERNAL: ACR S M I CHELSON 1 *CRS MOELLER 2 2 D AEOD/DOA 1 AEOD/DSP/NAS 1 1 AEOD/DSP/ROAB 2 AEOD/DSP/TPAB 1 1 ARM/DCTS/DAB DEDRO 1 1 NRR/DEST/ADS 7E 0 NRR/DEST/CEB 8H 1 1 S NRR/DEST/ESB 8D 1 NRR/DEST/ICSB 7 1 NRR/DEST/MEB 9H 1 NRR/DEST/MTB 9H 1 1 NRR/DEST/PSB 8D 1 NRR/DEST/RSB 8E 1 1 NRR/DEST/SGB 8D 1 NRR/DLPG/HFB 10 1 1 NRR/DLPG/GAB NRR/DREP/RAB 10 10 1 NRR/DOEA/EAB NRR/DREP/RPB 10 fi 1 1 2 2 NRR/DJJ9 SIB 9A 1 NRR/PMAS/ ILRB 12 1 1 R G FlLE 02 1 RES TELFORDi J 1 1 DE/EIB 1 RES/DRPS DIR f 1 RGN5 F ILE 01 1 EXTERNAL: EGhG GPOHi M 4 FORD BLDG HOY> A 1 1 H ST LOBBY NARD 1 1 LPDR 1 1 NRC PDR 1 1 NSIC HARRIS' 1 1 NSIC MAYS> G 1 1 NOTES:

S h

D TOTAL NUMBER OF COPIES REQUIRED: LTTR 47 ENCL 46

Arizona Nuclear Power Project P.O. BOX 52034 ~ PHOENIX, ARIZONA85072-2034 192-00362-JGH/TDS/JEN April 8, 1988 U. S. Nuclear Regulatory Commission NRC Document Control Desk Washington, D.C. 20555

Dear Sirs:

'I

Subject:

Palo Verde Nuclear Generating Station (PVNGS)

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

Special Report 1-SR-88-002 File: 88-020-404 Attached please find Special Report 1-SR-88-002 prepared and submitted pursuant to Technical Specification 3.3.3.1 ACTION 27-3 and Technical Specification 6.9.2. This report discusses a Radiation Hontioring Unit inoperable for greater than 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br />.

If you have any questions, please contact T. D. Shriver, Compliance t1anager at (602) 393-2521.

Very truly yours,

. P,/ga~c~p J. G. Haynes Vice President Nuclear Production JGH/TDS/JEH/kj Attachment cc: 0. t1. DeHichele (all w/a)

E. E. Van Brunt, Jr.

J. B. Hartin T. J. Polich E. A. Licitra A. C. Gehr INPO Records Center Sp4)ppgp3 8804 pDR ADOCK 0 DCD 8

1 PALO VERDE NUCLEAR GENERATING STATION Radiation t'lonitoring Unit Inoperable for Greater Than 72 Hours License No. NPF-41 Docket No. STN 50-529 Special Report No. 1-SR-88-002 This Special Report is heing submitted pursuant to Technical Specification 3.3.3.1 ACTION 27-3 and Technical Specification 6.9.2 to report an event in which a Containment Area Honitor (RU-149) 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 an operable status was exceeded at approximately 0355 HST on March 14, 1988. Pursuant to Technical Specification 3.3.3. ACTION 27-1 a preplanned alternate program 1 was initiated to monitor the appropriateparameter.

At 0355 HST on t1arch 11, 1988, Palo Verde Unit 1 was in trode 1 (POWER OPERATION) when a Containment Area Monitor, RU-149, was declared inoperable due to receiving Detector Failure alarms. Also Alert and High Level alarms were received even though the radiation levels were indicating slightly below normal readings.

An authorized work document was issued to troubleshoot, rework, or replace components as necessary. Several detector failures were identified during troubleshooting, however, the cause of the failures could not be determined.

A picoamp source and recorder were connected to RU-149 in different configurations in an attempt to locate the source of the failures. The picoamp source generates a constant signal and the recorder charts the results. However, the failures did not recur while this instrumentation was connected. The instruments were disconnected and on April 5, 1988, and RU-149 was returned to its normal configuration.

Surveillance test 36ST-9S()01 (Radiation tlonitoring monthly Functional Test Procedure) was performed satisfactorily on April 5, 1988. RU-149 is on line, however, it has not been returned to an operable status pending evaluation of the data. Presently the root cause of the problem has not been identified, therefore, a forecast date for returning RU-149 to an operable status has not been determined.

r

't