05000302/LER-1981-001-01, /01T-0:on 810107,during Performance of Quarterly Battery Check SP-511,determined That Battery Did Not Meet Tech Spec Requirements.Caused by Decrease in Specific Gravity of One Cell.Battery Placed on Equalize Charge

/01T-0:on 810107,during Performance of Quarterly Battery Check SP-511,determined That Battery Did Not Meet Tech Spec Requirements.Caused by Decrease in Specific Gravity of One Cell.Battery Placed on Equalize Charge

ML20003B201
Person / Time
Site:	Crystal River
Issue date:	02/06/1981
From:	FLORIDA POWER CORP.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML20003B195	List: 05000302/LER-1981-001, Forwards LER 81-001/01T-0 05000302/LER-1981-001-01, /01T-0:on 810107,during Performance of Quarterly Battery Check SP-511,determined That Battery Did Not Meet Tech Spec Requirements.Caused by Decrease in Specific Gravity of One Cell.Battery Placed on Equalize Charge
References
LER-81-001-01T, LER-81-1-1T, NUDOCS 8102100508
Download: ML20003B201 (3)

LER-1981-001, /01T-0:on 810107,during Performance of Quarterly Battery Check SP-511,determined That Battery Did Not Meet Tech Spec Requirements.Caused by Decrease in Specific Gravity of One Cell.Battery Placed on Equalize Charge

Event date:
Report date:
3021981001R01 - NRC Website

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(o a :l lAt 1210 during performance of SP-511, Quarterly Battery Check (Units 1 & 2), it was,

(discovered that the Unit #2 battery did not meet the requirements of T. S. Surveil [o.2i Io s a i (lar,ee 4.8.1.1.1.c.2.b). This created an event contrary to T. S. 3.8.1.1. Redandancy l l o i s ! [wn e. nrnvided by Unit el batterv and by EDG-1A and IB.

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lii: lIThe cause of this event was that the soecific cravitv of one cell had decreased by I tiinI LO.013 More than 0.01 allowable) from the orevious readina.

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Nornbil ity was reetnred at 0925 of 1/8/81. The second I i. 3) [

..n, + cause was a maladjustment in a level switch. The switch was adjusted; opera g I..!Ibility was restored at 0730 on 1/7/81.

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SUPPLEMENTARY INFORMATION 4

Report No.:

81-001/01T-0 Facility:

Crystal River Unit 83 Report Date:

February 6, 1981 Occurrence Date:

January 7, 1981 Identification of Occurrence:

Failure to meet Technical Specification Surveillance requirement 4.8.1.1.c.2.b) contrary to Technical Specification 3.8.1.1.

Conditions of Occurrence:

Mode 1 power operation (98%).

Description of Occurrence:

At 1210 during performance of SP-511, Quarterly Battery Check (Units 1 & 2), it was discovered that the Unit #3 battery did not meet the requirements of Technical Specification Surveillance 4.8.1.1.1.c.2.b).

The con-servative assumption was made that Action Statement 3.8.1.1.c was applicable. The Dmergency Diesels were fast-started to prove redundancy. The battery was put on equalize charge. At 1700, it was discovered that EDG-lA fuel oil storage tank had less than 400 gallons volume; the transfer pumps (DFP-1A and IC) had not auto started. The pumps would operate in manual control.

Maintenance was initiated and operability of the Emergency Diesels was restored at 1730 on January 7,1981, t.t 0925, on January 8, 1981, operability was restored to the Unit #3 battery.

Designation of Apparent Cause:

The cause of the.first occurrence was that the specific gravity of one cell deviated by more than 0.01 from the previous reading. The cause of the second event was a mal-adjustment of level switch DF-2-LS.

Analysis of Occurrence:

There was no effect upon the health ~or safety of the general public. The Unit #1 battery capacity was sufficient to ensure D. C. Control power to the 230 KV switchyard breakers to supply A. C. electrical power to the onsite class lE distribution system.

e SUPPLEMENTARY INFORMATION (CONTINUED)

Corrective Action

The equalizing charge restored the specific gravity of the cell to acceptable limits. A revision to Technical Soccifi-cations will be submitted to modify requirements to reflect plant design with regard to Units 1 & 2 batteries.

DP-2-Ls was adjusted and operability was restored.

Failure Data:

This is the fifth occurrence for Units 1 & 2 batteries, the first occurrence for day tank level and transfer pumps DFP-1A and 1C and this is the twenty-first event reported under this specification.

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