05000366/LER-1980-001-03, /03L-0:on 800102,while Performing Narrow Range Torus Water Level Functional Test & Calibr,Level Transmitter 2T48-N021B Found Out of Tolerance.Caused by Range Drift. Transmitter Recalibr & Returned to Svc

/03L-0:on 800102,while Performing Narrow Range Torus Water Level Functional Test & Calibr,Level Transmitter 2T48-N021B Found Out of Tolerance.Caused by Range Drift. Transmitter Recalibr & Returned to Svc

ML19257C017
Person / Time
Site:	Hatch
Issue date:	01/15/1980
From:	Nix R GEORGIA POWER CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19257C015	List: 05000366/LER-1980-001, Forwards LER 80-001/03L-0 05000366/LER-1980-001-03, /03L-0:on 800102,while Performing Narrow Range Torus Water Level Functional Test & Calibr,Level Transmitter 2T48-N021B Found Out of Tolerance.Caused by Range Drift. Transmitter Recalibr & Returned to Svc
References
LER-80-001-03L, LER-80-1-3L, NUDOCS 8001220583
Download: ML19257C017 (2)

LER-1980-001, /03L-0:on 800102,while Performing Narrow Range Torus Water Level Functional Test & Calibr,Level Transmitter 2T48-N021B Found Out of Tolerance.Caused by Range Drift. Transmitter Recalibr & Returned to Svc

Event date:
Report date:
3661980001R03 - NRC Website

text

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NRC F ORM 366 (7 77)

LICENSEE EVENT REPORT CONTROL BLOCK: l l

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l l lh (PLEASE PRINT OR TYPE ALL REQUIRED INFORMATION) 1 6

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60 61 DOCK E T NUVS E H 68 69 EVENT DATE 14 75 REPORT DATE 80 EVENT DESCRIPTION AND PROBADLE CONSEQUENCES Oio lo J 21 l While performing HNP-2-3819, Narrow Range Torus Water Level Functional Test and i

Calibration, level transmitter 2T48-N021B, was found to be out of tolerance.

This g o ;3, i

,o,,; l had no effect on plant status, because the redundant level transmitter, 2T48-N021A, l

was reading correctly. The reactor was at steady state operation.

The health and o s i

io g ; l safety of the general public was not affected.

This is a non-repetitive event.

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40 41 42 43 44 47 33 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS h l The reason the transmitter, 2T48-N0218, was out of tolerance was due to zero and l

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li i, i l range drif t.

The transmitter was re-calibrated per HNP-2-5288, Calibration for j

l HNP-2-3819 was again performed and ;

,,,,, ; Rosemount Transmitters, and returned to service.

l passed satisfactorily.

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NAME OF PHEPARER

NARRATIVE

REPORT Georgia Power Company Plant E.

I. llatch Baxley, Georgia 31513 Reportable Occurrence Report No. 50-366/1980-01 While the reactor was at a steady state operation and while performing Procedure llNP-2-3819, Narrow Range Torus Water I.evel Functional Tes t and Calib ration, level t ransmitter 2T48-N021E was found to be out of tolerance.

The t ransmitter's output 10 to 50 made

.2 made corresponding to 133 to 163 inches of water in the torus was found at 8.3 and 52.3 madc.

The reason the transmitter was out of tolerance was attributed to zero and range dri f t.

The transmitter was re-calibrated per calibration procedure llNP-2-5288, Rosemount 1151 AP Transmitter Calibration, and retunied to service.

Surveillance procedure, ilNP-2-3819, was again performed and passed satisfactorily.

This did not e f fect the operational status of the plant which was operating at 100% power, because the redundant Torus Water Level Transmitter, 2T48-N021A, I

was operating properly. The problem of transmitter drif t had not happened on Unit Il before this particular time.

Unit I has a similar set-up for measuring Torus water level.

The dif ference is that Unit I has G. E. 555 AP Transmitters instead of Rosemounts.

1783 327