05000272/LER-1979-004-03, /03L-0 on 790103:Loop 4 Channel IV Was 100 Psi Too High.Caused by Steam Pressure Transmitter Being Frozen by an Outside Air Damper Directing Cold Air Onto the Sensing Lines

/03L-0 on 790103:Loop 4 Channel IV Was 100 Psi Too High.Caused by Steam Pressure Transmitter Being Frozen by an Outside Air Damper Directing Cold Air Onto the Sensing Lines

ML18078A684
Person / Time
Site:	Salem
Issue date:	01/18/1979
From:	Kapple A Public Service Enterprise Group
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML18078A683	List: 05000272/LER-1979-004-03, /03L-0 on 790103:Loop 4 Channel IV Was 100 Psi Too High.Caused by Steam Pressure Transmitter Being Frozen by an Outside Air Damper Directing Cold Air Onto the Sensing Lines
References
LER-79-004-03L, LER-79-4-3L, NUDOCS 7901230158
Download: ML18078A684 (1)

LER-1979-004, /03L-0 on 790103:Loop 4 Channel IV Was 100 Psi Too High.Caused by Steam Pressure Transmitter Being Frozen by an Outside Air Damper Directing Cold Air Onto the Sensing Lines

Event date:
Report date:
2721979004R03 - NRC Website

text

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NRC FORM 366 U.S. NUCLEAR REGULATORY COMMISSION

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e LfCENSEE EVENT REPOR-r-CONTROL BLOCK: I 1

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(PLEASE PRINT OR TYPE ALL REQUIRED INFORMATIONI

[§JI]' IN IJ Is I G Is I 1 101 0 I 0 I - I 0 I 0 I 0 I 0 I 0 I - I 0 I 0 10)14 111111 I 1 l©I I I© 7

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LICENSEE CODE 14 ts LICENSE NUMBER 25 26 LICENSE TYPE

JO 57 CAT SS CON'T C2:ITI 7

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~~~~ LJJ©I o I s I o I o I o I 2 I 7 I 2 101 o I 1 I o I 3 I 7 I 9 I© I o 11 I 1 I a I 1 I 9 10 60 St DOCKET NUMBER 68 69 EVENT DATE 74 75 REPORT DATE 80 EVENT DESCRIPTION ANO PROBABLE CONSEQUENCES @

[))2J I During normal operation at 0845 hours0.00978 days <br />0.235 hours <br />0.0014 weeks <br />3.215225e-4 months <br />, the status alarm panel indicated Loop 1 steam

[))))I pressure 100 psi less than Loop 4.

A check of steam pressure channels showed normal /.

readings for all except Loop 4 Channel IV which read about 100 psi high.

The channel I was declared inoperable and Action No. 14 for T/S 3.3.2.1 was implemented.

The

[§))] I channel was returned to service at 1020 hours0.0118 days <br />0.283 hours <br />0.00169 weeks <br />3.8811e-4 months <br /> and Action No. 14 was terminated.

())}] I This is the second occurrence of this type.

(78-79)

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CAUSE

CAUSE CODE CODE SUBCODE COMPONENT CODE rIIIl IIIBI@ *W@ w@ lrlNISITIRlul@

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TYPE L1J 30 VAL.VE SUB CODE w@

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CAUSE DESCRIPTION ANO CORRECTIVE ACTIONS @

44 47

• _ [JJ]J--1 The sensing.line to_ __ the steam pressure transmitter was frozen due to an outside air o::ill I.damper directing cold air* onto the sensing lines.

The space heaters fo:t this area o::::ril I were also de-energized.

The damper was shut, the space heaters energized, the [IrIJ I sensingline was blown down, and the channel was returned.to se+vice.

Inservice OJI] I tests verified operability.

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ACTIVITY CONTENT t::'\\

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N/A 80 PERSONNEL EXPOSURES

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A. W. Kapple PHONE:

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