ML20100D190
| ML20100D190 | |
| Person / Time | |
|---|---|
| Site: | Nine Mile Point  |
| Issue date: | 11/13/1984 |
| From: | Mangan C NIAGARA MOHAWK POWER CORP. |
| To: | Starostecki R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| References | |
| (NMP2L-0236), (NMP2L-236), 55(E)-84-44, NUDOCS 8412050712 | |
| Download: ML20100D190 (2) | |
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N3FKdBA MIAGARA MOHAWK POWER CORPORATION /300 ERIE BOULEVARD WEST. SYRACUSE, N Y.13202/ TELEPHONE (315) 4741511 1
November 13,1984 (NMP2L0236)
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_ Rosemount Model 1153B transmitters.-
This problem was reported via tel-con to T. Silko of your staff on October 12, 1984 Very truly yours, C. V. Mangen Vice President Nuclear Engineering and Licensing CVM/GG/dd Enclosure xc: Director of Inspection and Enforcement U. S. Nuclear Regulatory Commission Washington, DC ~20555 R. A. Graami, _ NRC Resident Inspector ProjectFile(2) 8412000712 1113
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a NIAGARA M0 HAWK POWER CORPORATION NINE MILE POINT - UNIT 2 00CKET NO.-50-410 Interim Report for a Problem Concerning Rosemount Model 1153B Transmitters (55(e)-84-44)
Description of the Problem The problem concerns Model 1153 Series B pressure transmitters manufactured by Rosemount Incorporated after January 10, 1984.
Rosemount has identified a potential leakage path in the seal of the threads between the sensor module and the electronic-housing.
According to Rosemount, there is a possibility that this leak path could allow moisture from. the ambient surrounding environment -to enter the electronics housing during abnormal operating conditions and cause the transmitter to stop functioning.
Transmitter Mark Nos. 2RSS*PT109 and 2IAS*PT230 through 236 are affected by this problem.
These transmitters have no direct control function.
Pressure transmitter Mark No. 2RSS*PT109 monitors the pressure of the automatic depressurization system Tank No. 33 and provides a pressure indication at the remote shutdown panel.
Pressure transmitter Mark Nos. 2IAS*PT230 through 236 monitor the pressure of the automatic depressurization system accumulator Tank Nos. 32 through 38 Rosemount Incorporated is still investigating the corrective action.
Therefore, a final report will be submitted by January 21, 1985, t
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