ML20100E482
| ML20100E482 | |
| Person / Time | |
|---|---|
| Site: | Nine Mile Point  |
| Issue date: | 11/16/1984 |
| From: | Mangan C NIAGARA MOHAWK POWER CORP. |
| To: | Starostecki R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| References | |
| REF-PT21-85-065-000 (55(E)-84-46), (NMP2L-245), (NMPZL-245), NMP2L-0245, NMP2L-245, PT21-85-065-000, PT21-85-65, NUDOCS 8412060256 | |
| Download: ML20100E482 (2) | |
Text
.
NUMOHAWK Y NIAGARA NIAGARA MOHAWK POWER CORPORATION /300 ERIE BOULEVARD WEST. SYRACUSE. N Y.13202/ TELEPHONE (315) 474-1511 November 16, 1984 (NMP2L 0245)
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 Mr. Starostecki:
Enclosed is an interim report, in accordance with 10CFR50.55(e), for the problem concerning the tricentric valves supplied by Clow Corporation.
This problem was reported via tel-con to W. Lazarus of your staff on October 17, 1984.
Very truly yours, C. V. Mangan Vice President Nuclear Engineering and Licensing CVM/GG/dd xc: Director of Inspection and Enforcement U. S. Nuclear Regulatory Commission Washington, DC 20555 R. A. Gramm, NRC Resident Inspector Project File (2) 8412060256 841116 gDRADOCK 05000410 PDR t i I
RE A@
NIAGARA M0 HAWK POWER CORPORATION NINE MILE POINT - UNIT 2 DOCKET NO. 50-410 Interim Report for a Problem Concerning Tricentric Valves Supplied by Clow Corporation (55(e)-84-46)
Description of the Problen It was observed that some of the tricentric valves supplied by Clow Corporation had varying physical characteristics even though their specification requirements were the same.
As a result, Clow was requested to inspect the valves and determir.
if they would operate as required by the specifications. The inspection identified the following conditions:
1.
The cast arrows on the handwheels of valves 2SWP*MOV74A and E were incorrect.
The arrow indicated an opening direction, when actual rotation in that direction would close the valve.
2.
The limit switches. of the valves 2SWP*MOV74A, C,
and E were improperly adjusted.
3.
The torque switches on valves 2SWP*MOV74A and E were wired incorrectly.
4.
The SMBs, electrical actuators, for valves 2SWP*MOV74A, C, and E were rotated 90 deg. from the mounting position for which they ' were seismically qualified.
Clow also indicated that all valves with vertical shafts should be reviewed for annular key load levels.
The matter is still under investigation and a final report will be submitted by May 15,1984 f
l l
l l
l l
.