ML20204J058
| ML20204J058 | |
| Person / Time | |
|---|---|
| Site: | Nine Mile Point  |
| Issue date: | 07/01/1986 |
| From: | Mangan C NIAGARA MOHAWK POWER CORP. |
| To: | Starostecki R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| References | |
| (55(E)-86-07), (55(E)-86-7), (NMP2L-0762), (NMP2L-762), NUDOCS 8608080295 | |
| Download: ML20204J058 (2) | |
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1Ng MAGARA RIONAWK POWER CORPORATION /300 ERIE BOULEVARD WEST. SYRACUSE N.Y.13202/ TELEPHONE '315) 474-1511 July 1, 1986 (NMP2L 0762)
Mr. R. W. Starostecki, Director U.S. Nuclear Regulatory Commission Region I Division of Reactor Projects 631 Park Avenue
' King of Prussia, PA 19406 Re: Nine Mile Point - Unit 2
-Docket No. 50-410
Dear Mr. Starostecki:
Enclosed is an final report, in accordance with 10CFR50.55(e), for the problem concerning excessive vibrations in the low pressure fuel oil supply lines of Division I and II standby diesel generators.
This problem was reported via tel-con to G. Meyer of your staff on May 8,1986 and an interim report was submitted on June 9,1986.
Very truly yours, M-C. V. Mangan i
Senior Vice President CVM/GG/cla (1591H)
Enclosure xc: Director of Inspection and Enforcement U.S. Nuclear Regulatory Commission Washington, DC 20555 R. A. Gramm, NRC Senior Resident Inspector hNPC Project File l
86o8080295 860701 l
PDR ADOCK 0500 0
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,3 NIAGARA M0 HAWK POWER CORPORATION NINE MILE POINT - UNIT 2 DOCKET N0. 50-410 Final Report for a Problem Concerning Damaged Fuel Lines in Divisions I and II Diesel Generators (55(e)-86-07)
Description of the Problem The problem concerns the low pressure fuel oil supply line from the fuel oil filter to the engine fuel oil supply header.
During testing and inspection activities for Divisions I and II standby diesel generators at the NtiP2 site, it was observed that the low pressure fuel oil supply line vibrates excessively.
In Division I diesel 2EGS*EG1, two holddown clamps were damaged and subsequently a pin-size leak developed in the fuel line.
In the case of Division II diesel 2EGS*EG3, surface damage was observed on the fuel line at a point where it came in contact with a 1-in. tube line.
Analysis of Safety Implications The cause of excessive vibrations in the fuel supply line is believed to be the inadequate support / clamp arrangement for the supply line configuration.
In the worst case scenario, it is possible that damage to the fuel supply line could have prevented the diesel (s) from performing their intended safety function.
Therefore, if this condition were to have remained uncorrected, it could have adversely affected the safety of operations of the power plant.
Corrective Action The damaged fuel lines will be replaced per Engineering & Design Coordination Report #C46953.
In addition, plastic coated pipe clamps will be added per Engineering & Design Coordination Report #C47192.
The work will be completed prior to fuel load.
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