05000272/LER-1979-053-01, /01T-0 on 790810:upon Review of All Pipe Supports within Sample of Stress Calculations for safety-related Piping,Rejection Rate Found to Be Outside Normal Limits of Statistical Sampling Techniques.Evaluation Underway

/01T-0 on 790810:upon Review of All Pipe Supports within Sample of Stress Calculations for safety-related Piping,Rejection Rate Found to Be Outside Normal Limits of Statistical Sampling Techniques.Evaluation Underway

ML19275A027
Person / Time
Site:	Salem
Issue date:	08/23/1979
From:	Kapple A Public Service Enterprise Group
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML19275A024	List: 05000272/LER-1979-053, Forwards LER 79-053/01T-0 05000272/LER-1979-053-01, /01T-0 on 790810:upon Review of All Pipe Supports within Sample of Stress Calculations for safety-related Piping,Rejection Rate Found to Be Outside Normal Limits of Statistical Sampling Techniques.Evaluation Underway
References
LER-79-053-01T, LER-79-53-1T, NUDOCS 7908300557
Download: ML19275A027 (2)

LER-1979-053, /01T-0 on 790810:upon Review of All Pipe Supports within Sample of Stress Calculations for safety-related Piping,Rejection Rate Found to Be Outside Normal Limits of Statistical Sampling Techniques.Evaluation Underway

Event date:
Report date:
2721979053R01 - NRC Website

text

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Report Number:

79-53/0lT Report Date:

8/23/79 Occurrence Date:

8/10/79 Facility:

Salem Generating Station Public Service Electric & Gas Company Hancock's Bridge, New Jersey 08038 IDENTIFICATION OF OCCURRENCE:

Pipe Support Stress Calculations CONDITIONS PRIOR TO OCCURRENCE:

Operational Mode 5 DESCRIPTION OF OCCURRENCE:

The Engineering Department has evaluated a sample of the stress calculations for all safety-related piping in accordance with the requirements of NRC Bulletin 79-07 and found them to be acceptable.

However, upon review of all the pipe supports within those sample calculations, we found the rejection rate did not fall within normal limits of statistical sampling techniques.

Based on the above evaluation, we believe that the sample is representative of the total population of pipe supports at Salem No. 1 and, therefore, we deduce that a certain portion of the supports will require repair.

DESIGNATION OF APPARENT CAUSE OF OCCURRENCE:

The cause of this occurrence will be determined by PSE&G Engineering Department and will be reported at a later date.

ANALYSIS OF OCCURRENCE:

PSE&G Engineering Department will provide an analysis of this occur-rence which will be included in a supplemental report.

CORRECTIVE ACTION

Corrective action will be taken, as required, when the evaluation of this occurrence is complete.

2031 188 FAILURE DATA:

Not Applicable

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2 Prepared By A. W. Kapple Manager - Salem Generating Station SORC Meeting No.

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