ML20090E254
| ML20090E254 | |
| Person / Time | |
|---|---|
| Site: | Nine Mile Point  |
| Issue date: | 07/06/1984 |
| From: | Lempges T NIAGARA MOHAWK POWER CORP. |
| To: | Starostecki R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| References | |
| REF-PT21-84-332-000 84-20, NMP2L-0106, NMP2L-106, PT21-84-332, PT21-84-332-000, NUDOCS 8407190369 | |
| Download: ML20090E254 (2) | |
Text
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,y Y NIAGARA NuMOHAWK NIAGARA MOHAWK POWER CORPORATION /300 ERIE BOULEVARD WEST, SYRACUSE, N.Y.13202/ TELEPHONE (315) 474-1511 July 6, 1984 (NMP2L 0106)
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: Nin] Mile Point Unit 2 Docket No. 50-410
Dear Mr. Starostecki:
Enclosed is an interim report in accordance with 10CFR50.55(e) for the problem concerning silicon controlled rectifiers in the ITE Brown-Boveri trip devices (55(e)-84-20). This problem was reported via telecon to Mr. S. Collins of your staff on June 8, 1984.
Very truly yours, O
T.
. Lempges Vice President Nuclear Generation TEL/TRL:djm Enclosure xc: Director of Inspection and Enforcement U.S. Nuclear Regulatory Commission Washington, D.C. 20555 R. Grann (NRC Resident) 8407190369 840706 PDR ADOCK 05000 S
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NIAGARA M0 HAWK POWER CORPORATION NINE MII.E POINT INIT 2 DOCKET NO. 50-410 Interim Report for a Problem Concerning Silicon Controlled Rectifiers (55(e)-84-20)
Description of the Problem The problem concerns silicon controlled rectifiers in the ITE (Brown-Boveri) trip devices.
In the Nine Mile Point Unit 2 design, these trip devices are used in 600V type K-Line breakers. The problem was reported by Brown-Boveri Electric, Inc. to the Nuclear Regulatory Commission under 10CFR21 via letter dated April 16, 1984.
The matter is still under investigation and a final report will be submitted by December 31, 1984.
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