05000272/LER-1979-045, Forwards LER 79-045/01X-1

Forwards LER 79-045/01X-1

ML18081A673
Person / Time
Site:	Salem
Issue date:	11/10/1979
From:	Librizzi F Public Service Enterprise Group
To:	Grier B NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML18081A674	List: 05000272/LER-1979-045, Forwards LER 79-045/01X-1 05000272/LER-1979-045-01, /01X-1:on 790601,imperfections Found in Impeller of Component Cooling Pump 13.Caused by Mfg Technique Prior to ASME Code Examination Requirements.Original Impellers Replaced
References
NUDOCS 7912040402
Download: ML18081A673 (3)

LER-1979-045, Forwards LER 79-045/01X-1

Event date:
Report date:
2721979045R00 - NRC Website

text

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e 0 PSfffiG Public Service Electric and Gas Company 80 Park Place Newark, N.J. 07101 Phone 201 /430-7000 Mr. Boyce H. Grier Director of USNRC November 10, 1979 Off ice of Inspection and Enforcement Region 1 631 Park Avenue King of Prussia, Pennsylvania 19406

Dear Mr. Grier:

LICENSE NO. DPR-70 DOCKET NO. 50-272 REPORTABLE OCCURRENCE 79-45/0lT SUPPLEMENTAL REPORT Pursuant to the requirements of Salem Generating Station Unit No. 1 Technical Specifications, Section 6.9.1, we are submitting supple-mental Licensee Event Report 79-45/0lX-l.

Sincerely yours,

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F. P. Librizzi General Manager -

Electric Production CC:

Director, Office of Inspection and Enforcement (30 copies)

Director,. Office of Management Information and Program Control

( 3 copies) 7912040 ~DL-.

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Report Number:

79-45/0lX-l Report Date:

11/10/79

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Occurrence Date:

6/01/79 Facility:

Salem Generating Station Public Service Electric & Gas Company Hancock's Bridge, New Jersey 08038 IDENTIFICATION OF OCCURRENCE Imperfections in Component Cooling Pump Impellers CONDITIONS PRIOR TO OCCURRENCE:

Operatonal Mode 6 -

Refueling DESCRIPTION OF OCCURRENCE:

Evaluation of No. 13 Component Cooling,Pump March surveillance perfor-mance data in accordance with ASME Code Section XI showed pump delta P in the alert range.

The pump was disassembled during the refueling outage and inspection of the impeller showed porosity and linear indications where the impeller vanes meet the outer ring.

It was decided to replace the impeller with an on-hand spare while waiting for evaluation of the indications.

Inspection of the spare impeller showed the same type of indications in the same approximate locations.

The two impellers were sent back to the manufacturer for evaluation of the indications while No. 11 and 12 Component Cooling Pumps were being disassembled.

Inspection of No. 11 and 12 pump impellers showed similar indications.

DESIGNATIO~ OF APPARENT CAUSE OF OCCURRENCE:

The impeller indications were the result of foundry, welding and cleaning techniques.

ANALYSIS OF OCCURRENCE:

Gould Pumps, Inc. has investigated the pump imperfections and their evaluation concludes that the indications, based on a metallurgical viewpoint, are not to be considered significant or result in propa-gation to effect fatigue life.

The pumps, including impellers, were manufactured prior to the advent of ASME Code requirements.

The impellers did not receive any visual inspection or other types of quality examination.

Public Service Engineering Department accepts the vendors evaluation to the extent that the pump impellers were in no eminent danger of failure due to the detected impeller indications.

LER 79-45/0lX-l CORRECTIVE ACTION:

The original pump impellers have been replaced with new, thoroughly inspected, stainless steel impellers and no further action is required.

FAILURE DATA:

Component Cooling Pump Impellers ASTM A216, GR WCB (carbon steel)

Impeller Pattern #53228 Pumps:

Model 3405, Size 10xl2-17 Manufactured by Gould Pumps, Inc.

Prepared By A. W. Kapple SORC Meeting No.

82-79