ML17318A517
| ML17318A517 | |
| Person / Time | |
|---|---|
| Site: | Cook  |
| Issue date: | 12/20/1979 |
| From: | Shaller D INDIANA MICHIGAN POWER CO. |
| To: | James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| References | |
| IEB-79-14, NUDOCS 7912270337 | |
| Download: ML17318A517 (3) | |
Text
REGULATOO INFORMATION OISTRISUTION%STEM (RIOS)
DOCKET OSi) 0O31e ACCESSION NBR: 7912270337 DOC ~ DATE ~ 79/12/20 NOTARIZED!
NO "FACIL:50 316 Donald C ~
Cook Nuclear Powei Planti Onit= 2i Indiana 8
AUTH ~ NAME AU'tHOR AFFILIATION SHALLKRiD,VS Ind)ana 8 Aichigan Power Co, REC Il ~ NAME RECIPIENT AFFILIATION KEF'PLERrJ ~ G ~
'Rag)on 3g Chicagoi Office of the Director 1
SUBJECT:
Confirms 791219 verbal rept to REI Masse re nonconformance in small piping aye Analysis indicated that
- 1. inch pipe between primary piping 8 excess,let down heat exchanger-would be sti essed above yield limit in event of earthquake, DISTRIBUTION CODE:
A002S COPIES RECEIVED ~ LTR g ENCL) LJ SIZE:
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/~leeerka iNDIANA8 MICHIGANPOKER CDMPANY DONALD C. COOK NUCLEAR PLANT P.O. Box 458, Bridgman, Michigan 49106 December 20, 1979 Mr. J.G. Keppler, Regional Director Office of Inspection and Enforcement United States Nuclear Regulatory Commission Region III 799 Roosevelt Road Glen Ellyn, IL 60137 Operating License DPR-74 Docket No. 50-316
Dear Mr. Keppler:
This is to confirm our verbal report to NRC Region III Inspector, Mr. R.E. Masse, at 1620 hours0.0188 days <br />0.45 hours <br />0.00268 weeks <br />6.1641e-4 months <br /> on December 19, 1979.
At that time we reported that as part of the inspection and analysis process mandated by IE Bulletin 79-14, a significant non-conformance was identified in a small piping system of Unit 2'f the Cook Plant.
This significant non-conformance arose because of a discrepancy between the piping design analysis and the "as-built" condition.
The piping involved is a 1.0" diameter line, connected between the primary piping and the excess let-down heat exchanger.
Reanalysis indicated that the 1.0" diameter pipe would be stressed above the yield limit in the unlikely event that the Design Basis Earthquake occurs.
The piping system was reanalyzed with two additional restraints and all the stresses were found to be within the code allowable limit.
The modification is being imple-mented in the Unit.
A followup report will be submitted by January 2,
- 1980, as required by Technical Specification Section 6.9.1.8.
Sincerely, D.V. Shaller Plant Manager
/bab cc:
J.E.
Dolan R.S. Hunter R.W. Jurgensen R.F. Kroeger R. Kilburn R.E.
Masse RO:III R.C. Callen MPSC G. Charnoff, Esq.
G. Olson J.M. Hennigan PNSRC J.F. Stietzel E.L. Townley Dir., IE (40 copies)
~Di'r,, MIPC--(4-copies)