05000255/LER-1986-010, Withdrawn LER 86-010-00 Re Missing Pipe Hangers on Integrated Leak Rate Test Instrument Line.Results of Analysis Using ASME Code Case N-411 Revealed That Line,W/O Pipe Support,Statically Qualified

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Withdrawn LER 86-010-00 Re Missing Pipe Hangers on Integrated Leak Rate Test Instrument Line.Results of Analysis Using ASME Code Case N-411 Revealed That Line,W/O Pipe Support,Statically Qualified
ML20141H514
Person / Time
Site: Palisades Entergy icon.png
Issue date: 04/17/1986
From: Johnson B
CONSUMERS ENERGY CO. (FORMERLY CONSUMERS POWER CO.)
To:
Office of Nuclear Reactor Regulation
References
LER-86-010, LER-86-10, NUDOCS 8604240347
Download: ML20141H514 (1)
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LER-2086-010, Withdrawn LER 86-010-00 Re Missing Pipe Hangers on Integrated Leak Rate Test Instrument Line.Results of Analysis Using ASME Code Case N-411 Revealed That Line,W/O Pipe Support,Statically Qualified
Event date:
Report date:
2552086010R00 - NRC Website
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l Consumers .

@rewramus MKMN'E PROGRE55 Power General offices: 1945 West Parnall Road, Jackson, MI 49201 + (517) 788-0550 April 17, 1986 Director,

,. Nuclear Reactor-Ryulation I US Nuclear Regulatory Commission Washington, DC 20555 DOCKET 50-255 - LICENSE DPR PALISADES PLAhT -

LICENSEE EVENT REPORT 86-010 (MISSING PIPE HANGER RESULTS IN A POTENTIALLY INOPERABLE PENETRATION), WITHDRAWAL Licensee Event Report 86-010, dated March 11, 1986, identified a discovery of a missing hanger on an ILRT instrument line. The instrument line is a containment boundary and would be expected to meet static and seismic require--

ments. The static and seismic capability of the system was indeterminate as a result of the missing hanger. A conservative assumption was therefore made that *he support was necessary for operability. This assumption resulted in the performance of the immediate and subsequent notifications prescribed by 10CFR50.72 and 10CFR50.73. In additicn, immediate action was provided to reinstall the pipe hanger.

Following the submittal of the Licensee Event Report, an analysis of the system was completed. This analysis was performed through the application of ASME Code Case N-411 and appropriate computer codes. The results of these efforts have shown that the line, without the pipe support, was statically qualified and would have remained operable in a seismic event.

Based on the results of our analysis, this occurrence did not result in a condition that is reportable under the requirements of 10CFR50.73. Therefore, by this letter, we are withdrawing Licensee Event Report 86-010, dated March 11, 1986.

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/ *<A.A44 n! e Brian D Johnson Staff Licensing Engineer CC Administrator, Region III, USNRC NRC Resident Inspector - Palisades

[ g 8604240347 860417 OC0486-0067-NLO2 ADOCK 0500 5

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