05000280/LER-1980-002-03, /03L-0:on 800106,during Routine Release of Lwtt 80-95,LW Effluent Flow Recorder Paper Did Not Rotate & Thus No Record of Flow Note Was Obtained.Caused by Inadequate Mesh Between Recorder Drive Gears & Recorder Paper Roll

/03L-0:on 800106,during Routine Release of Lwtt 80-95,LW Effluent Flow Recorder Paper Did Not Rotate & Thus No Record of Flow Note Was Obtained.Caused by Inadequate Mesh Between Recorder Drive Gears & Recorder Paper Roll

ML18136A437
Person / Time
Site:	Surry
Issue date:	01/30/1980
From:	Stewart W VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.)
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML18136A436	List: 05000280/LER-1980-002-03, /03L-0:on 800106,during Routine Release of Lwtt 80-95,LW Effluent Flow Recorder Paper Did Not Rotate & Thus No Record of Flow Note Was Obtained.Caused by Inadequate Mesh Between Recorder Drive Gears & Recorder Paper Roll 05000280/LER-1980-003-03, /03L-0:on 800107,during Prestartup Testing, Feedwater Bypass Valve HCV-FW-155B Did Not Fail Closed Upon Loss of Instrument Air as Per Design.Caused by Sticking, Dirty Pilot Valve.Valve Cleaned & Returned to Svc ML18136A435
References
LER-80-002-03L, LER-80-2-3L, NUDOCS 8001290202
Download: ML18136A437 (2)

LER-1980-002, /03L-0:on 800106,during Routine Release of Lwtt 80-95,LW Effluent Flow Recorder Paper Did Not Rotate & Thus No Record of Flow Note Was Obtained.Caused by Inadequate Mesh Between Recorder Drive Gears & Recorder Paper Roll

Event date:
Report date:
2801980002R03 - NRC Website

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'--NRC FORM-366-~--

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IV I A I s Ip Is I 1 101* 0 7

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LICENSEE CODE 14 15 101-10101010 10 1-fo 10 1014 11 f1 11 11 101 I 10 LICENSE NUMBER 25 26 LICENSE TYPE 30 57 CAT 58 CON'T CITD 7

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~~~~~~ LJ© I o I s I o I o I o I 2 I s I o 101 o 1 11 o I 6 I s I o 101 o I 1 I 31 o I s I o I G) 60 61 DOCKET NUMBER 68 69 EVENT DATE 74 75 REPORT DATE 80 EVENT DESCRIPTION AND PROBABLE CONSEQUENCES@

I During a routine release of LWTT number 80-95, the LW effluent flow recorder paper did I

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I not rotate when the drive gears disengaged from the recorder paper roll.

This is

((II] 1contrary to T.S. 3.11.A.5 and is reportable in accordance with t.S. 6.6.2.b.2.

All [QJ}J I pertinent information on the effluent release was recorded on the form H.P. 5-1.1.

[§:))] I No other plant systems were affected and the health and safety of the public were not [IIzJ I affected.

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SYSTEM CODE I I ID I@

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20 30 31 PRIME COMP.

TAKEN ACTION ON PLANT METHOD HOURS SUBMITTED FORM SUB.

SUPPLIER REVISION NO.

I..QJ 32 COMPONENT MANUFACTURER 80 ACTION FUTURE EFFECT SHUTDOWN

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43 44 47 [II)) jThe cause of the malfunction was that there was not an adequate mesh between the record~r OJJJ jdrive gears and the recorder paper roll.

The recorder involved was a Hagan, Model iOl,I [IJI] !miniature recorder.

The corrective action was to ensure proper operation of the

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!recorder prior to the next effluent release.

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11 12 13 80 PERSONNEL INJURIES (41}

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9 11 12 80 LOSS OF OR DAMAGE TO FACILITY '43' TYPE

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SURRY POWER STATION, UNIT 1 DOCKET NO: 50-280 REPORT NO: 80-002/031-0 EVENT DATE: 01-06-80 TITLE OF EVENT:

Flow Recorder (FR-LW-104A) Malfunction

1.

DESCRIPTION OF EVENT

During a routine release of LWTT #80-95, the LW effluent flow recorder paper did not rotate.

This is contrary to T.S. 3.11.A.5 and is re-portable in accordance with T.S. 6.6.2.b.2.

The drive gears disen-gaged from the recorder paper roll, causing the paper to remain stationary and thus no record of flow rate was obtained.

However, information about the release such as: 1) initial LWTT volume; 2) final LWTT volume, and 3) time duration of release, was recorded on Health Physics Form HP 3-5-1.1, No. 80-95.

2.

PROBABLE CONSEQUENCES AND STATUS OF REDUNDANT SYSTEMS All other systems of the plant necessary for the safe release of the LW effluent operated properly.

Only the flow rate recorder was involved in this event.

• Because the system was monitored by the operators, the health and safety of the public were not affected.

3.

CAUSE

The recorder paper roll is driven by drive gears that mesh with perforations along the paper's edge.

In order for the recorder to operate properly, the paper must be held taut against the roller and drive gears.

During the event, the paper was not held taut, and, although the drive gears rotated properly, the paper was not advanced.

Thus, no continuous record of flow rate was obtained.

4.

IMMEDIATE CORRECTIVE ACTION

The tension on the paper was adjusted so that proper recorder operation was attained before beginning the next effluent release.

5.

SCHEDULED CORRECTIVE ACTION The operators were instructed to insure proper paper tension and a good mesh between the recorder gears and the paper perforations.

6.

ACTION TAKEN TO PREVENT RECURRENCE Operators are instructed-to observe recorder operation before effluent release.

7.

GENERIC IMPLICATIONS This malfunction is considered random because no specific instrument pr system has exhibited repeated failures.

There are no generic.implications.

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