ML19320A715
| ML19320A715 | |
| Person / Time | |
|---|---|
| Site: | Grand Gulf  |
| Issue date: | 06/24/1980 |
| From: | MISSISSIPPI POWER & LIGHT CO. |
| To: | |
| Shared Package | |
| ML19320A714 | List: |
| References | |
| NUDOCS 8007020539 | |
| Download: ML19320A715 (1) | |
Text
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Attachment A to AECM-80/141 Page 1 of 1 FINAL REPORT, PRD-80/11 ("odel 1152 Pressure Transmitter)
I.
Description of Deficiency The 1152 Pressure Transmitter has a common-mode failure of a capacitor when the transmitter operating temperature is greater than 175 F or when the damping potentiometer is rotated clockwise. The failure is mainifested as a drop in transmitter output current up to 10% of the correct current.
II.
Safety Implications Due to the inherent safety functions of these devices, failure would adversely affect the safety of operation of Grand Gulf Nuclear Station, Units 1 and 2.
As an example, when the 1152 Transmitter is used as a pressure transmitter, the deficiency can result in transmitting reactor pressure 10% lower than actual.
III. Corrective Action Taken
, General Electric has issued Field Disposition Instructions (FDI's) to repair defective Model 1152 Pressure Transmitters on site.
Details of the corrective action are delineated in the following FDI's:
Unit 1 Unit 2 Transmitters FDI-WAME FDI-WBIY
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