ML17303A673

Special Rept 1-SR-87-023:on 870930,cathodic Protection Sys for Diesel Generator Fuel Oil Storage Tanks Inoperable for More than 30 Days.Caused by Delay in Delivery of Anode Bed Backfill Matl.Mod Completion Expected by 871215

ML17303A673
Person / Time
Site:	Palo Verde
Issue date:	11/05/1987
From:	Haynes J ARIZONA PUBLIC SERVICE CO. (FORMERLY ARIZONA NUCLEAR
To:	NRC OFFICE OF ADMINISTRATION & RESOURCES MANAGEMENT (ARM)
References
1-SR-87-023, 1-SR-87-23, 192-00311-JGH-T, 192-311-JGH-T, NUDOCS 8711120071
Download: ML17303A673 (6)

Text

~ ~ 0 t REGULA~~Y INFORM*TION DISTR IBUTIO~SYSTEM (RIDS)

• CCESSION NBR: 8711120071 DOC. DATE: 87/11/05 NOTARIZED: NO DOCKET FACIL: MN-50-528 Palo Verde Nuclear Stations Unit ii Ari zona Pub li 05000528 AU~H. NAME AUTHOR *FFILIATION HAYNES'. G. Arizona Nuclear Power Prospect (formerly Arizona Public Serv RECIP. NAME REClPIENT AFFILIATION Document Control Branch (Document Control Desk)

SUBJECT:

Special rept: on 870930'athodic protection sos for diesel generator fuel oil storage tanks declared inoperable to permit installation of new anode bed 8. electrodes. Caused bg failed anode. damaging adjacent operable anode beds.

DISTRIBUTION CODE: IE22D COPIES RECEIVED: LTR TITLE: 50. 73 Licensee Event Report (LER) ~

J ENCL +

Incident Rpti etc.

SIZE:

NOTES: Standardized plant. 05000528 RECIPIENT COPIES REC IP IENT COPIES ID CODE/NAME LTTR ENCL ID CODE/NAME LTTR ENCL PD5 LA PD5 PD 1 r 1 LICITRAiE 1 DAVIS' 1 INTERNAL: *CRS MI CHELSON 1 1 ACRS MOELLER 2 2 AEOD/DQA 1 1 AEQD/DSP/NAS 1 1 AEOD/DSP/RQAB 2 2 AEOD/DSP/TPAB 1 1 ARM/DCTS/DAB 1 1 DEDRO 1 1 NRR/DEST/ADS 1 0 NRR/DEST/CEB 1 1 NRR/DEST/ELB 1 1 NRR/DEST/ ICSB 1 1 NRR/DEST/MEB 1 NRR/DEST/MTB 1 1 NRR/DEBT/PSB 1 1 NRR/DEST/RSB 1 NRR/DEST/SGB 1 1 NRR/DLPG/HFB 1 NRR/DLPG/GAB 1 NRR/DOE*/EAB 1 1 NRR/DRFP/RAB 1 1 NRR/DREP/RPB 2 2 DF+Q/S I B 1 1 NRR/PM*S/ ILRB '1 1 RFC - -& 02 1 RES DEPY GI 1 1 RES TELFORDi J 1 1 RES/DE/EIB 1 1 RGN5 FILE 01 1 1 EXTERNAL: EGZcG GRQHi M 5 5 H ST LOBBY WARD 1 LPDR 1 NRC PDR 1 1 NSIC HARRIS' 1 NSIC MAYST G 1 1 TOTAL NUMBER OF COPIES REQUIRED: LTTR 47 ENCL 4*

II

~ C Arizona Nuclear Power Project P.O. BOX 52034 ~ PHOENIX, ARIZONA85072-2034 192-00311-JGH-TRB/KCP November 5, 1987 I

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 NPF-41)

Special Report 1-SR-87-023 File:. 87-020-404 Attached please find Special Report 1-SR-87-023 prepared and submitted pursuant to Technical Specifications 3.8.1.3 and 6.9.2. This report discusses the Cathodic Protection System for the Diesel Generator Fuel Oil Storage Tanks being inoperable for over 30 days.

If you have any questions, please contact T. R. Bradish, Compliance Lead at (602) 393-3531.

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

E. E. Van Brunt, Jr.

J. B. Martin J. R. Ball E. A. Licitra A. C. Gehr INPO Records Center 87 f f f 2007f ADOCK 0 87~if 0528 PDR PDR S

J V

PALO VERDE NUCLEAR GENERATING STATION CATHODIC PROTECTION SYSTEM INOPERABLE OVER 30 DAYS License No. NPP-41 Docket No. 50-528 Special Report No. 1-SR-87-023 This Special Report is being submitted in accordance with Technical Specifications (T.S.) 3.8.1.3 and 6.9.2 to report an event in which the Cathodic Protection System for the Diesel Generator Fuel Oil Storage Tanks was inoperable for over 30 days.- The 30 day limit for inoperability was exceeded at approximately 1045 MST on October 30, 1987.

At approximately 1045 MST on September 30, 1987, Palo Verde Unit 1 was in Mode 1 (POWER OPERATION) at approximately 85 percent power when the Cathodic Protection System for the Diesel Generator Puel Oil Storage Tanks (A and B) was declared inoperable to permit installation of a new anode bed (A54) and 2 new electrodes in accordance with an approved site modification. This modification was necessary because the potential level for the portion of the Cathodic Protection System for the south diesel storage tank had dropped below acceptable levels due to failure of anode bed A48(1). The root cause of this failure is indeterminate as the failed anode is inaccessible without extensive excavation which would damage adjacent, operable anode beds.

Installation of the site modification was initiated. under an approved work document and scheduled for completion by October 15, 1987, however, completion of the installation was held up due to delays in delivery of the anode bed backfill material (e.g., petroleum coke breeze).

Installation of the site modification will resume as soon as the required backfill material is available for installation, and is expected to be completed prior to December 15, 1987.

II II I