05000272/LER-2078-044-03, Inoperability of No. 11 S/G Feedwater Flow Channel 2

Inoperability of No. 11 S/G Feedwater Flow Channel 2

ML19031B036
Person / Time
Site:	Salem
Issue date:	08/24/1978
From:	Librizzi F Public Service Electric & Gas Co
To:	Grier B NRC/IE, NRC Region 1
References
LER 1978-044-03
Download: ML19031B036 (4)

LER-2078-044, Inoperability of No. 11 S/G Feedwater Flow Channel 2

Event date:
Report date:
2722078044R03 - NRC Website

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~~~~{£1f f~t~ ~~~w Public Service Electric and Gas Company 80 Park Place Newark, N.J. 07101 Phone 201/622-7000 Mr. Boyce H. Grier Director of USNRC August 24, 1978 Office of Inspections and Enforcements Region 1 631 Park Avenue King of Prussia, Pennsylvania 19406

Dear Mr. Grier:

LICENSE NO. DPR-70 DOCKET NO. 50-272 REPORTABLE OCCURRENCE 78-44/03L

... _1 Pursuant to the requirements of Salem Generating Station Unit No. 1 Technical Specifications, Section 6.9.1.9.a, we are submitting Licensee Event Report for Reportable Occurrence 78-44/03L.

This report is required within thirty (30) days of the occurrence.

Sincerely yours, F. P. Librizzi General Manager -

Electric Production CC:

Director, Office of Inspection and Enforcement (30 copies)

Director, Office of Management Information and Program Control (3 copies) ri ~

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e Report Number:

78-44/03;L Report Date:

8/24/78 Occurrence Date:

8/9/78 Facility:

Salem Generating Station Public Service Electric & Gas Company Hancocks Bridge, New. Jersey 08038 IDENTIFICATION OF OCCURRENCE:

No. 11 Steam Generator Feedwater Flow Channel II Inoperable CONDITIONS PRIOR TO OCCURRENCE:

Operational Mode 1, Reactor Power 99%

DESCRIPTION OF OCCURRENCE:

At 2040 hours0.0236 days <br />0.567 hours <br />0.00337 weeks <br />7.7622e-4 months <br />, during functional testing, No. 11 Steam Generator Feed-water Flow Channel II was declared inoperable due to the trip point being above the.Technical Specification limit.

Action Statement No. 7 for LCO 3.3.1.1 was implemented and at 2335 hours0.027 days <br />0.649 hours <br />0.00386 weeks <br />8.884675e-4 months <br />, instrumentation per-sonnel returned the channel to operable status.

DESIGNATION OF APPARENT CAUSE OF OCCURRENCE:

This occurrence was the result of a failed operational amplifier in the dual comparator which resulted in the trip setpoint being above

• the Technical Specification limit.

ANALYSTS OF OCCURRENCE:

~echnical Specification 3.3.1.1, Action Statement No. 7, states that "with the number of operable channels one less.than the total number of channels, startup and/or power operation may proceed until perform-ance of the next required channel functional test provided the inoperable channel is placed in the tripped condition within 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br />".

No. 11 Steain Generator Feedwater Flow Channel II was placed in the tripped con_dition with-in 1 -hour* and remained in that condition until

'it ~as returned to operable status.

CORRECTIVE ACTION

.Four operational amplifiers were replaced in the Hagan Dual Output Comparator.

The comparator was then replaced.

The functional test

- _was then completed to confirm operability.

LER 78-44/03L FAILURE DATA:

Dual Output Comparator-Manufacturer:

Model:

Hagan Controls Orville, Ohio 4111082-002 Prepared by T. L. Spencer

~~~~~--=~~~~~~~-

SORC Meeting No.

51-78

~~~~~~~~~~-

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1 Manager l_ s!iem Generating Static

U.S. NUCLEAR REGULATURY COMMISSION 11.n1 e

LICENSEE EVENT REPORT

• CONTROL BLOCK: I I I 1 G) 1 6

(PLEASE PRINT OR TYPE ALL REQUIRED INFORMATION!

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CQID I During functional testing, No. 11 S/G Feedwater Flow Channel 2 was J

!TID declared inoperable due to the bistable setpoint being above T.S.

limit~

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All remaining channels were operable.

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44 47 DJ)) I The* cause of this occurrence was failed operational amplifier in the dual comparator module which resulted in the setpoint being above T.S.

ITJ]J limits.

Operational amplifiers were replaced and functional test completed.

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FACILITY tJo'I STATUS

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NUMBER

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METHOD OF

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a 9 11 12 1:1 80 PERSONNEL INJURIES

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NUMBER DESCRIPTION~

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11 12 80 LOSS OF OR DAMAGE TO FACILITY t4:j\\

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II I I I I I I I I I I I t sa 69 ao ;

(609)365-7000 Salem Ext.~

528 NAMEOFPRE?ARER~~--T"-"-.-=L~-.._-s.o~e~n-c.;;..;::e~r.._ __________ __

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