ML20101F621
| ML20101F621 | |
| Person / Time | |
|---|---|
| Site: | Nine Mile Point  |
| Issue date: | 12/06/1984 |
| From: | Mangan C NIAGARA MOHAWK POWER CORP. |
| To: | Starostecki R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| References | |
| (55(E)-84-33), (NMP2L-0281), (NMP2L-281), NUDOCS 8412270244 | |
| Download: ML20101F621 (2) | |
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MIAGARA MOHA.VK POWER CORPORATION /300 ERIE BOULEVARD WEST, SYRACUSE, N.Y.13202/ TELEPHONE (315) 4741511 e.
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_' December 6,1984 (NMP2L 0281) i Mr. R. W. Starostecki, Director.
U. S. Nuclear Regulatory Commission Region I Division of Project and Resident Programs
~631 Park Avenue King of Prussia, PA-19406 Re: Nine Mile Point - Unit 2 Docket No. 50-410
Dear !!r. Starostecki:
Enclosed is a final report, in accordance with 10CFR50.55(e), for. the problem concerning the reactor core isolation cooling turbine steam admission line.
This problem was reported via tel-con to P.
Russ of your staff on August 15, 1984 An interim report was submitted via our letter dated September 13, 1984 Very truly yours, C. V. Mangan Vice President Nuclear Engineering and Licensing CVM/GG:csb (0560H) xc: Director of Inspection and Enforcement-U. S. Nuclear Regulatory Commission Washington, DC 20555 R. A. Gramm, NRC Resident Inspector'
- Project File (2) 8412270244 341206
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NIAGARA M0 HAWK POWER CORPORATION NINE MILE POINT - UNIT 2 DOCKET NO. 50-410 Final Report for a Problem Concerning Reactor Core Isolation Cooling System Turbine Steam Admission Line (55(e)-84-33)
Description of the Problem The steam supply line to the reactor core isolation cooling system turbine contains a vertical section which could pemit accumulation of condensate.
This column of condensate may be carried into the turbine on system start.
Analysis of Safety Implications Since a detailed piping analysis was not perfomed for the condition described abcve, we cannot dismiss the potential for exceeding stress limits in the piping system during turbine start-up.
Therefore, had this condition gone undetected, it could have adversely affected the safety of operations of the pl ant.
Corrective Action A 1-inch diameter drain line will be installed on the downstream side of the steam admission valve, 2ICS*MOV120 The installation will be completed prior to the turbine start-up and testing.
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