ML17303A673
| 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) | |
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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 Arizona 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 J ENCL +
SIZE:
TITLE:
- 50. 73 Licensee Event Report (LER)
~ Incident Rpti etc.
NOTES: Standardized plant.
05000528 RECIPIENT ID CODE/NAME PD5 LA LICITRAiE COPIES LTTR ENCL 1
REC IP IENT ID CODE/NAME PD5 PD DAVIS' COPIES LTTR ENCL 1
r 1
1 INTERNAL: *CRS MICHELSON AEOD/DQA AEOD/DSP/RQAB ARM/DCTS/DAB NRR/DEST/ADS NRR/DEST/ELB NRR/DEST/MEB NRR/DEBT/PSB NRR/DEST/SGB NRR/DLPG/GAB NRR/DRFP/RAB DF+Q/S I B RFC 02 RES TELFORDi J RGN5 FILE 01 EXTERNAL:
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1 1
1 2
2 1
1 1
0 1
1 1
1 1
1 1
1 1
1 1
1 1
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1 1
ACRS MOELLER AEQD/DSP/NAS AEOD/DSP/TPAB DEDRO NRR/DEST/CEB NRR/DEST/ ICSB NRR/DEST/MTB NRR/DEST/RSB NRR/DLPG/HFB NRR/DOE*/EAB NRR/DREP/RPB NRR/PM*S/ ILRB RES DEPY GI RES/DE/EIB H ST LOBBY WARD NRC PDR NSIC MAYST G 2
2 1
1 1
1 1
1 1
1 1
1 1
1 1
1 1
1 2
2
'1 1
1 1
1 1
1 1
1 1
1 TOTAL NUMBER OF COPIES REQUIRED:
LTTR 47 ENCL 4*
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C Arizona Nuclear Power Project P.O. BOX 52034
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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
Dear Sirs:
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 fff2007f 87~if0528 PDR ADOCK 0 PDR S
JV
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.
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