ML19320A715

Final Deficiency Rept (PRD-80/11) Re Model 1152 Pressure Transmitter W/Common Mode Failure of Capacitor at Greater than 175 F or When Damping Potentiometer Is Rotated Clockwise.Ge Issued Field Disposition Instructions

ML19320A715
Person / Time
Site:	Grand Gulf
Issue date:	06/24/1980
From:	MISSISSIPPI POWER & LIGHT CO.
To:
Shared Package
ML19320A714	List: ML19320A713 ML19320A715 ML19320A717
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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