ML17303A429

Special Rept 3-SR-87-001:on 870514,high Range Noble Gas Activity Monitor RU-144 Inoperable for Greater than 72 H. Caused by Low & High Range Plant Vent Monitors Being Taken Out of Svc on 870511 for Implementation of Change Package

ML17303A429
Person / Time
Site:	Palo Verde
Issue date:	06/08/1987
From:	Haynes J ARIZONA PUBLIC SERVICE CO. (FORMERLY ARIZONA NUCLEAR
To:	NRC OFFICE OF ADMINISTRATION & RESOURCES MANAGEMENT (ARM)
References
192-00215-JGH-T, 192-215-JGH-T, 3-SR-87-001, 3-SR-87-1, NUDOCS 8706160159
Download: ML17303A429 (6)

Text

REGULA INFORMATION DISTR IBUTIO YSTEM (RIDS)

ACCESSION NBR: 8706160159 DOC. DATE: 87/06/08 NOTARIZED: NO DOCKET 5

() FACIL: STN-50-530 Palo Verde Nuclear Station Unit 3 Arizona Pub li 05000530 AUTH. NAME AUTHOR AFFILIATION HAYNESa J. G. Arizona Nuclear Poeer ProJect (formerly Arizona Public Serv RECIP. NAME RECIP IENT AFFILIATION Document Control Branch (Document Control Desk)

SUBJECT:

Special rept: on 870514a high range noble gas activity monitor RU-144 inoperable for greater than 72 h. Caused bg low 9~ high range plant vent monitors being taken out of svc on 870511 to allow implementation of plant change package.

DISTRIBUTION CODE: IE22D COPIES RECEIVED:LTR ENCL SIZE:

TITLE: 50. 73 Licensee Event Report (LER) a Incident Rpta etc.

NOTES: Standardized plant. M. Davisi NRR: iCg. 05000530 RECIPIENT COP IES RECIPIENT COPIES ID CODE/NAME LTTR ENCL ID CODE/NAME -LTTR ENCL PD5 LA 1 PD5 PD 1 1 LICITRAz E 1 1 DAVISa M 1 1 INTERNAL: ACRS MICHELSON 1 ACRS MOELLER AEOD/DOA 1 1 AEOD/DSP/ROAB AEOD/DSP/TPAB 1 1 DEDRO NRR/DEBT/ADE 1 0 NRR/DEST/ADS NRR/DEST/CEB 1 1 NRR/DEST/ELB NRR/DEST/ICSB 1 NRR/DEST/MEB NRR/DEST/MTB 1 1 NRR/DEST/PSB NRR/DEBT/RSB 1 1 NRR/DEST/SGB NRR/DLPG/HFB 1 1 NRR/DLPG/GAB NRR/DOEA/EAB 1 NRR/DREP/RAB NRR/DREP/RPB 2 2 ILRB NRR/PMAS/PTSB 1 EG 02 RES DEPY GI 1 RGN5 FILE 01 EXTERNAL: EG5G GROHi M 5 5 H ST LOBBY WARD LPDR 1 1 NRC PDR NSIC HARRISl J 1 1 NSIC MAYSa G NOTES:

TOTAL NUMBER OF COPIES REQUIRED: LTTR 44 ENCL 42

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Arizona Nuclear Power Project P.o. BOX 52034 ~ PHOENIX. ARIZONA85072-2034 192-00215-JGH/TRB/MJC June 8, 1987 NRC Document Control Desk U.S. Nuclear Regulatory Commission Washington, D.C. 20555

Subject:

Palo Verde Nuclear Generating Station Vnit 3 Docket No. STN 50-530 (License NPF-65)

Special Report 3-SR-87-001 File: 87-020-404

Dear Sirs:

Attached please find a Special Report 3-SR-87-001 prepared and submitted pursuant to Technical Specifications 3.3.3.8 and 6.9.2. This report discusses two radiation monitors that were out of service 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 Tom Bradish, Compliance Supervisor at (602) 932-5300, Ext. 6936.

Very trul yours, J. G. Haynes Vice President Nuclear Production JGH/TRB/MJC/cld Attachment cc: 0. M. DeMichele (all w/a)

E. E. Van Brunt, Jr.

J. B. Martin R. P. Zimmerman R. C. Sorenson E. A. Licitra A. C. Gehr INPO Records Center 70608 8706160>59 8750005SO PDR ADOCK 0 o PDR 8

I' PALO VERDE NUCLEAR GENERATING STATION Radiation Monitoring Inoperable for Greater Than 72 Hours License No. NPF-65 Docket No. STN 50-530 Special Report 3-SR-87-001 This Special Report is being submitted pursuant to Technical Specification (T.S.)

3.3.3.8 ACTION 42b and T.S. 6.9.2 to report an event in which a high range noble gas activity monitor (RU-144) 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 operability was exceeded at approximately 1430 MST on May 14, 1987.

Pursuant to T.S. 3.3.3.8 ACTION 42a the Preplanned Alternate Sampling Program was initiated to monitor the plant ventilation system.

At approximately 1430 MST on May 11, 1987, Palo Verde Unit 3 was in Mode 5 (COLD SHUTDOVN) prior to initial criticality when the low and high range plant vent monitors (RU-143 and RU-144 respectively) were taken out of service to allow the implementation of Plant Change Package (PCP) 85-03-SQ-041-00. This PCP was implemented as an enhancement to provide Class 1E back up power to RU-143 and RU-144 from the "B" train emergency diesel generator.

Following the completion of modifications to RU-143 and RU-144, 75ST-9ZZ07 (Effluent Monitoring System Daily Surveillance Test) was performed to return the monitors to service. Monitors RU-143 and RU-144 were declared operable at approximately 0020 on May 15, 1987. The monitors were unavailable for approximately 82 hours9.490741e-4 days <br />0.0228 hours <br />1.35582e-4 weeks <br />3.1201e-5 months <br />.