ML17304A405

Informs That Radiographic Exams Performed on Selected Piping Welds of Various Sizes & Locations on 880127.No New Areas of Microbiologically Induced Corrosion/Pitting or Size or Population Changes of Affected Areas Noted

ML17304A405
Person / Time
Site:	Palo Verde
Issue date:	08/21/1988
From:	Karner D ARIZONA PUBLIC SERVICE CO. (FORMERLY ARIZONA NUCLEAR
To:	NRC OFFICE OF ADMINISTRATION & RESOURCES MANAGEMENT (ARM)
References
161-01252-DBK-P, 161-1252-DBK-P, NUDOCS 8809010257
Download: ML17304A405 (6)

Text

ACCESSION NBR:8809010257 DOC.DATE: 88/08/21 NOTARIZED: NO DOCKET FACIL:STN-50-529 Palo Verde Nuclear Station, Unit 2, Arizona Publi 05000529 AUTH.NAME AUTHOR AFFILIATION KARNERgD.B.

Arizona Nuclear Power Project (formerly Arizona Public Serv RECIP.NAME RECIPIENT AFFILIATION Document Control Branch (Document Control Desk)

SUBJECT:

Informs that radiographic exams performed on selected piping welds of various sizes

& locations on 880127.

DISTRIBUTION CODE:

A001D COPIES RECEIVED:LTR ENCL SIZE:

TITLE: OR Submittal: General Distribution NOTES:Standardized plant.

RECIPIENT ID CODE/NAME PD5 LA LICITRA,E INTERNAL: ACRS NRR/DEST/ADS 7E NRR/DEST/ESB 8D NRR/DEST/RSB 8E NRR/PMAS/ILRB12 OGC/HDS1 RES/DSIR/EIB EXTERNAL: LPDR NSIC COPIES LTTR ENCL RECIPIENT ID CODE/NAME PD5 PD DAVIS,M ARM/DAF/LFMB NRR/DEST/CEB 8H NRR/DEST/MTB 9H NRR/DOEA/TSB 11 NUD-8S~N RACT EG F

01 NRC PDR CL COPIES LTTR EN 5

1 05000529 8

NOTES:

S h

TOTAL NUMBER OF COPIES REQUIRED:

LTTR 30 ENCL

Arizona Nuclear Power Project P.O. BOX 52034

~

PHOENIX, ARIZONA85072-2034 161-01252-DBK/PGN August 21, 1988 Docket No.

STN 50-529 Document Control Desk U.S. Nuclear Regulatory Commission Mail Station Pl-137 Washington, D.C.

20555

Reference:

1.

Letter from E.

E.

Van Brunt (ANPP), to G.

W. Knighton (NRC), dated May 24, 1985 (PP32739).

Subject:

Spray Pond Procedure.

2.

Letter from E. E.

Van Brunt (ANPP), to G.

W. Knighton (NRC), dated January 30, 1987 (PP34867).

Subject:

Spray Pond Pressure Monitoring Schedule.

3.

Letter from J.

G. Haynes (ANPP), to NRC, dated October 1,

1987 (161-00551).

Subject:

Spray Pond Monitoring Program.

Subject:

Palo Verde Nuclear Generating Station (PVNGS)

Unit 2 Spray Pond Radiography Results File:

88-F-056-026 PVNGS Technical Specification 6.8.4.f requires the spray ponds to be monitored in accordance with station procedure 73AC-9SP01, which was provided for your information by Reference 1

and supplemented by Reference 2

and 3.

This procedure requires that a

sample of welds previously radiographed when the microbiologically induced corrosion (MIC) was first discovered in March,

1985, be radiographed at the first refueling outage.

, On January 27, 1988, radiographic examinations were performed on selected piping welds of various sizes and locations consisting of approximately 10% of the welds previously radiographed in the Unit 2

"B" spray pond.

The underwater technique used consisted of draining the header, applying the film to the OD of the

pipe, placing the source opposite the film ad)acent to the

pipe, and shooting through the empty pipe.

Results showed no new areas of MIC/pitting and no changes in sizes or populations of previously affected areas.

5809010257 880821

@DOCK 05000529 P

PNU goo I

I

0 U.S. Nuclear Regulatory Commission Page 2

161-01252-DBK/PGN August 21, 1988 If you have any questions, please call Mr. A. C. Rogers at (602) 371-4041.

Very truly yours,

~il D. B. Karner Executive Vice President DBK/PGN/pvk cc:

G.

W. Knighton M. J. Davis J.

B. Martin T. J. Polich

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