ML17305A686

Special Rept 2-SR-90-001:on 900323,Train B Class 1E 4,160 Volt Bus Deenergized in Order to Perform Scheduled Maint. Preplanned Alternate Sampling Program Initiated to Monitor Plant Vent & Fuel Bldg Ventilation Sys.Sys Returned to Svc

ML17305A686
Person / Time
Site:	Palo Verde
Issue date:	04/12/1990
From:	James M. Levine ARIZONA PUBLIC SERVICE CO. (FORMERLY ARIZONA NUCLEAR
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
192-00647-JML-T, 192-647-JML-T, 2-SR-90-001, 2-SR-90-1, NUDOCS 9004200538
Download: ML17305A686 (6)

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REGULA". )RY INFORMATION 7I O.'i:SYSTEM DISTRIBUTZOIs SYSTEM RIDS ACCESSIAN NBR:9004200538 -DOC.DATE: 90/04/12 'NOTARIZED: NO DOCKET FACZL:STN-50-329 Palo, Verde Nuclear Station, Unit 2, Arizona:Publi 05000529

'AUTH. NAME AUTHOR AFFILIATION LEVINEgJ M. Arizona Public Service Co. (formerly Arizona Nuclear Power RECIP NAME RECIPIENT AFFILIATION

Document Control Branch (Document Control Desk)

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SUBJECT:

Special Rept '.2-SR-90-001:on 900323,Train B Class lE .4,,160 volt bus deenergized & monitors removed from svc.

DISTRIBUTION CODE: IE22D COPIES 'RECEIVED:LTR j ENCL / SIZE:

TITLE: 50.73/50.9 Licensee Event Report (LER), Incident Rpt, etc.

D NOTES:Standardized plant. 05000529 S

RECIPIENT COPIES RECIPIENT COPIES ID CODE/NAME LTTR ENCL ID CODE/NAME LTTR ENCL PD5 LA 1 1 PDS PD 1 1 PETERSONgS. 1 1 CHAN,T 1 1 INTERNAL: ACNW 2 2 ACRS 2 2 AEOD/DOA 1 1 AEOD/DSP/TPAB 1 1 AEOD/ROAB/DSP 2 2 DEDRO 1 1 NRR/DET/ECMB 9H 1 1 NRR/DET/EMEB9H3 1 1 NRR/DET/ESGB 8D 1 1 NRR/DLPQ/LHFB11 1 1 NRR/DLPQ/LPEB10 1 1 NRR/DOEA/OEAB11 1 1 NRR/DREP/PRPB11 2 2 NRR/DST/SELB 8D 1 1 NRR/DST/SICB 7E 1 1 SX/SPLB8D1 1 1 NRR/DST/SRXB 8E 1 1 REG FI 02 1 1 RES/DSIR/EIB 1 1 FILE 01 1 1 EXTERNAL: EGSG STUART,V.A 4 4 L ST LOBBY WARD 1 1 LPDR 1 1 NRC PDR 1 1 NSIC MAYSiG 1 1 NS IC MURPHY i G . A 1 1 NUDOCS FULL TXT 1 1 NOTES: 1 1 D

D NOTE IO ALL RIDS" RECIPIEÃIS:

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TOTAL NUMBER OF COPIES REQUIRED: LTTR 39 ENCL 39

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Arizona Public Service Company PALO VERDE NUCLEAR GENERATING STATION P.O, BOX 52034 ~ PHOENIX, ARIZONA 8$ 072-2034 JAMES M. LEVINE 192-00647- JML/TRB/RKR VICE PRESIDENT NUCLEAR PRODUCTION April 12, 1990 U. S. Nuclear Regulatory Commission Document Control Desk Washington, DC 20555

Dear Sirs:

Subj ect: Palo Verde Nuclear Generating Station (PVNGS)

Unit 2 Docket No. STN 50-529 (License No. NPF-51)

Special Report 2-SR-90-001 File'0-020-404 Attached please find Special Report 2-SR-90-001 prepared and submitted pursuant to Technical Specifications 3.3.3.8 ACTION 42b and 6.9.2. This report discusses inoperable Radioactive Gaseous Effluent Monitors resulting from a planned electrical bus outage during .the Unit 2 refueling.

If you have any questions, please contact T. R. Bradish, Compliance Hanager at (602) 393-2521.

Very truly yours, JML/TRB/RKR/tlg Attachment CC: W. F. Conway (all w/a)

J ~ B. Hartin D. H, Coe T. L. Chan A. C. Gehr A. L. Gutterman INPO Records Center 9004200538 9004' PDR ADQCK 05000529 S PNU ~$ 2' g

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PALO VERDE NUCLEAR GENERATING STATION Radiation. Monitoring Unit Inoperable for Greater Than,72 Hours License No. NPF-51 Docket No. STN 50-529 Special Report .2-SR-90-001 This Special Report is being submitted pursuant to Technical Specification 3.3.3.8 ACTION 42b and Technical Specification 6.9.2 to report a condition wherein the Plant Vent System and Fuel Building Ventilation System Radioactive Gaseous Effluent High Range Monitors were 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 Plant Vent System High Range Monitor (RU-144) and the Fuel Building Ventilation System High Range Monitor (RU-146) to operability was exceeded at approximately 1700 MST on March 26, 1990.

On March 23, 1990, Palo Verde Unit 2 was in a refueling outage with the core off-loaded to the Spent Fuel Pool. In order to perform scheduled maintenance during the refueling outage, the "B" Train Class IE 4160 volt bus (2E-PBB-S04) was de-energized. This bus supplies power to RU-144 and RU-146; therefore, the monitors were removed from service at approximately 1700 MST on March 23, 1990. Pursuant to Technical Specification 3.3.3.8 ACTION 42a, the Preplanned Alternate Sampling Program was initiated to monitor the Plant Vent and Fuel Building Ventilation systems as needed.

Following the "B" Train electrical outage, RU-144 and RU-146 will be returned to service.

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