ML19210E275
| ML19210E275 | |
| Person / Time | |
|---|---|
| Site: | Palisades  |
| Issue date: | 11/09/1979 |
| From: | Hoffman D CONSUMERS ENERGY CO. (FORMERLY CONSUMERS POWER CO.) |
| To: | James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| References | |
| IEB-79-14, NUDOCS 7912040219 | |
| Download: ML19210E275 (3) | |
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4,.. coa. si7 7e s.e sso November 9,1979 Mr James G Keppler Office of Inspection and Enforcement Region III US Nuclear Regulatory Commission Q '"
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Glen Ellyn, IL 60137 DOCKET 50-255 - LICENSE DPR PALISADES PLANT - CONSUMERS POWER COMPANY - RESPONSE TO IE BULLETIN 79-14: SEISMIC ANALYSIS FOR AS-BUILT SAFETY-RELATED PIPING SYSTEMS Enclosed please find Consumers Power Company's 120-day response to Item 3 of IE Bulletin 79-14 (Seismic Analysis for As-Built Safety-Related Piping Systems). The delay in Consumers Power Company's response is the result of in-house evaluation of data associated with the initial pipe stress run packages. This delay was discussed in a meeting between Consumers Power Company and staff of Region III US Nuclear Regulatory Commission on October 26, 1979.
Additional details relating to this IE Bulletin are expected to be submitted prior to plant start-up from the current outage.
f e.Z David P Hoffman Nuclear Licensing Administrator CC Director, Office of Nuclear Reactor Regulation Director, Office of Inspection and Enforcement 1470 264 y n y 4 r" 407C 7$l3Obb
SEISMIC ANALYSIS FOR AS-BGILT SAFETY RELATED PIPING SYSTEMS FOR PALISADE" NUCLEAR PLANT CONSUMER POWER COMPANY 1.
INTRODUCTION USNRC Bulletin 79-14 ddted July 2, 1979 (including Revi-sion 1, July 18, 1979, Supplement 1, August 15, 1979, and Supplement 2, September 7, 1979) requested information be provided at 30, 60 and 120 day intervals.
The Consumers Power C.upeny 30 and 60 day response were 1,
1979 and August provided by CPCo letters dated August 30, 1979.
The following information is provided as the 120 day response.
2.
STATUS OF INSPECTION estimate is some 22,550 feet of piping and The current 2,346 supports are invelved in the inspection.
The Palisades Nuclear Plant was shut down for refueling on therefore most of the piping considered
- 1979, September 8, inaccessible per paragraph 2 of the CPCo 60 day response is currently accessible.
As of October 31, 1979, the to status:
following points are noted with respect the Approximately 50 personnel are devoted at Palisades site to the effort.
Approximately 40 additional personnel at off-site locations are devoted to evaluation of data being gathered on site.
Approximately 16,100 feet of pipe and 1,570 sup-the site.
The ports have been inspected at existing conditions have been recorded on drawings which are being processed.
Data on approximately 4,500 feet of pipe and its associated supports have been finalized and for-warded off-site for evaluation.
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s 3.
STATUS OF EVALUATION The piping being inspected and evaluated per NRC IE Bulletin 79-14 is comprised of about 70 pipe stress computer runs.
As of October 31, 1979, the following points are noted with respect to evaluation of data gathered at the site:
The field data in evaluation (about 4,500 feet) consists of some 24 stress computer runs.
Evaluation of 8 of the pipe stress computer runs versus field data has been completed.
Seven of the evaluations revealed no non-conformances.
One pipe stress computer run revealed the need for an additional pipe support.
The pipe support is being designed and will be installed.
CPCo is evaluating reportability with raspect to the Plant Technical Specifications.
Other less significant discrepancies are being handled in a systematic method for corrective action.
1470 266