05000272/LER-1978-082-03, /03L-0 on 781228:zero Flow Was Indicated on Plant Vent Recorder Because of Frozen Condensation in Transmitter Sensing Lines.Caused by de-energized Temporary Heat Tracing

/03L-0 on 781228:zero Flow Was Indicated on Plant Vent Recorder Because of Frozen Condensation in Transmitter Sensing Lines.Caused by de-energized Temporary Heat Tracing

ML18078A710
Person / Time
Site:	Salem
Issue date:	01/22/1979
From:	Kapple A Public Service Enterprise Group
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML18078A708	List: 05000272/LER-1978-082, Forwards LER 78-082/03L-0 05000272/LER-1978-082-03, /03L-0 on 781228:zero Flow Was Indicated on Plant Vent Recorder Because of Frozen Condensation in Transmitter Sensing Lines.Caused by de-energized Temporary Heat Tracing
References
LER-78-082-03L, LER-78-82-3L, NUDOCS 7901260208
Download: ML18078A710 (3)

LER-1978-082, /03L-0 on 781228:zero Flow Was Indicated on Plant Vent Recorder Because of Frozen Condensation in Transmitter Sensing Lines.Caused by de-energized Temporary Heat Tracing

Event date:
Report date:
2721978082R03 - NRC Website

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Report Number:

78-82/03L Report Date:

01/22/79 Occurrence Date:

12-28-78 Facility:

Salem Generating Station Public Service Electric & Gas Company Hancock's Bridge, New Jersey 08038 IDENTIFICATION OF OCCURRENCE:

Plant Vent Flow Recorder Inoperable CONDITIONS PRIOR TO OCCURRENCE:

Operational Mode 1 Reactor Power 99%

DESCRIPTION OF OCCURRENCE:

At 1000 hours0.0116 days <br />0.278 hours <br />0.00165 weeks <br />3.805e-4 months <br />, a Control Room operator observed a zero flow indication on the plant vent recorder.

Action as required by Environmental Technical Specification 2.3.4.b was implemented.

The recorder was returned to service at 1750 hours0.0203 days <br />0.486 hours <br />0.00289 weeks <br />6.65875e-4 months <br /> and inservice tests were run to verify operability.

DESIGNATION OF APPARENT CAUSE OF OCCURRENCE:

The cause of this occurrence was frozen condensation in the flow traris-mi tter sensing line due to installed temporary heat tracing being de-energized.

-~* ANALYSIS OF OCCURRENCE:

Environmental Technical Specification 2.3.4.b requires that gaseous releases to the environment, except from the Turbine Building ventilation exhaust and as noted in Specification 2.3.4.c, shall be continuously monitored for gross radioactivity and the flow continuously measured and recorded.

Whenever these monitors are inoperable, grab samples shall be taken and analyzed daily for gross radioactivity.

If these monitors are inoperable for more than seven (7) days, these releases shall be terminated.

The flow recorder was returned to service within eight (8) hours.

The plant vent effluent radiation monitor Rl6 channel was operational throughout this occurrence.

No gaseous releases or contain-ment ventilation occurred during the inoperability time of the flow recorder.

CORRECTION ACTION:

Condensation in the flow transmitter sensing line was blown out and the temporary heat tracing was energized.

A Design Change Request has been initiated to install permanent heat tracing on the sensin.( line.

790.A.26 Od-Q<t)

LER No. 78-82/03L FAILURE DATA:

Not Applicable Prepared by A. W. Kapple Manager salem Gen rating Station SORC Meeting No.

2-79

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NRC FOR~~6 (7-7'7'!-

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U.S. NUCLEAR REGULATURY COMMISSION 9-tCENSEE EVENT REPORT e

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. ())2] I During normal operation, a Control Operator noticed a zero flow indication on the plant vent recorder.

Action required by ETS 2.3.4.b was implemented.

The recorder was returned to service within 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br />.

The plant vent effluent radiation monitor Rl6 channel was operable throughout this occurrence.

No gaseous releases or containment ven-E2.I?J tilation was conducted during the recorders inope~ability. This is th3

_,. ()))) I first occurrence of this type.

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8 SYSTEM CODE IB IB I@

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LERtRO LVENTYEAR

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CAUSE

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CODE I I I o I s 12 I I /I

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20 l=1 31 ACTION FUTURE TAKEN ACTION ON PLANT METHOD HOURS SUBMITTED FORM :SUB.

EFFECT SHUTDOWN

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SUPPLIER

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42 CAUSE DES.CRIPTION AND CORRECTIVE ACTIONS @

43 I Frozen condensation in the transmitter sensing lines due to de-energized temporary heat tracing caused this occurrence.

REVISION NC. w 32 COMPONENT MANUFACTURER IL 11 I 3 !o I@

44 47 The lines were blown down and the heat tracing was energized.

Inservice tests o::IIl I verified operability.

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STATUS

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10 11 80 METHOD OF DISCOVERY DESCRIPTION DISCOVERY

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9 11 12 LOSS OF OR DAMAGE TO FACI LITV ~

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