ML20154E543
| ML20154E543 | |
| Person / Time | |
|---|---|
| Site: | Nine Mile Point  |
| Issue date: | 02/20/1986 |
| From: | Mangan C NIAGARA MOHAWK POWER CORP. |
| To: | Starostecki R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| References | |
| (NMP2L-0620), (NMP2L-620), NUDOCS 8603070269 | |
| Download: ML20154E543 (2) | |
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NIAGARA b00 HAWK POWER CORPORATl0N/300 ERIE BOULEVARD WEST, SYRACUSE. N.Y.13202/ TELEPHONE (315) 474-1511 February 20,'1986 (NMP2L 0620)
Mr. R. W. Starostecki, Director U.S. Nuc1 ear Regulatory Comission Region.I Division of Reactor Projects 631 Park Avenue 7.
ll; King of Prussia, PA 19406 Re: Nine Mile Point - Unit 2 Docket No. 50-410
Dear Mr. Starostecki:
Enclosed is a final report in accordance with 10CFR50.55(e) for the problem concerning clearance violations with platform framing steel and primary containment.
This problem was reported via tel-con to J. Linville of your staff on December 13, 1985, and an interim report was transmitted on January 13, 1986.
J Very truly yours, C.
Senior Vice President CVM/GG/cb (1461H) xc: Director of Inspection and Enforcement U.S. Nuclear Regulatory Commission Washington, DC 20555 R. A. Gram, NRC Senior Resident Inspector 1
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NIAGARA M0 HAWK POWER CORPORATION NINE MILE POINT - UNIT 2 DOCKET NO. 50-410 Final Report for a Problem Concerning Clearance Violations With Platform Framing Steel and Primary Containment (55(e)-85-30)
Description of the Problem Three clearance violations between structural steel framing of secondary containment and primary containment wall were identified by Nonconformance and Disposition Report No. 14015. The design specifies a 3-in. clearance between the wall and steel members to allow displacement due to seismic and/or thermal loadings.
Analysis of Safety Implications Detailed analysis of the consequences of the as built clearances less than the specified 3" was not performed. Therefore, the possibility exists that the defects, had they gone uncorrected, could have adversely affected the safety of operation of the plant.
Corrective Action Nonconformance and Disposition Report 14015 has been dispositioned specifying repairs to maintain the required clearances on identified cases.
.