05000325/LER-1980-019-03, /03L-0:on 800318,while Performing High Steamline Radiation Channel Alignment & Functional Test,Drawer D12-RM-K603D,Model 238X660G3,was Found Out of Specs.Caused by Instrument Drift.Drawer Recalibr

/03L-0:on 800318,while Performing High Steamline Radiation Channel Alignment & Functional Test,Drawer D12-RM-K603D,Model 238X660G3,was Found Out of Specs.Caused by Instrument Drift.Drawer Recalibr

ML19309E595
Person / Time
Site:	Brunswick
Issue date:	04/15/1980
From:	CAROLINA POWER & LIGHT CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19309E588	List: 05000325/LER-1980-019, Forwards LER 80-019/03L-0 05000325/LER-1980-019-03, /03L-0:on 800318,while Performing High Steamline Radiation Channel Alignment & Functional Test,Drawer D12-RM-K603D,Model 238X660G3,was Found Out of Specs.Caused by Instrument Drift.Drawer Recalibr
References
LER-80-019-03L-01, LER-80-19-3L-1, NUDOCS 8004220687
Download: ML19309E595 (2)

LER-1980-019, /03L-0:on 800318,while Performing High Steamline Radiation Channel Alignment & Functional Test,Drawer D12-RM-K603D,Model 238X660G3,was Found Out of Specs.Caused by Instrument Drift.Drawer Recalibr

Event date:
Report date:
3251980019R03 - NRC Website

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U. S. NUCLEAR REGULATORY COMMISSION N

FORM 366 (7,1)

LICENSEE EVENT REPORT CONTROL BLOCK: l l

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60 61 DOCKET NUYSER ba 69 EVENT 0 ATE 74 75 REPCRT OATE

- J EVENT DESCRIPTION AND PROBABLE CONSECUENCES h l 'Jhile performing PT 1.1.13P, High Steamline Radiation Channel Alignment and l

to12l I o 13 l l Functional Test, drawer D12-RM-K603E, model 238X660G3, was found out of speci-l l o l41 I fications. The drawer was found to alarm at 4.9 x background and the reportable l

lo Isl I limit is 3.5 x background. This is a recurring problem with this drawer.

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LER ATTACIDfENT - RO NO. 1-80-19 Facility: BSEP Unit No. 1 Event Date: March 18, 1980 A GE technical representative was on-site for two days to observe calibration

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of, and perform troubleshooting on, the main steamline radiation monitors. He found a weak Zener diode (VR6) in all three drawers checked on Unit No. 2 and recommended that we change out VR6 in all monitors.

This was done on Unit No. 2, in a refueling outage, and will be performed on Unit No. 1 during its refueling outage scheduled to start later this month. The technical representative also recommended several procedural changes, the most significant being a "zero" check and adjustment on a weekly basis. - These procedures are now being revised, and all monitors will be calibrated using these new procedures during the 1980 refueling outages.

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