ML20095B622

Proposed TS SR 4.8.2.1.2.e Re 60-month Battery Testing

ML20095B622
Person / Time
Site:	McGuire, Mcguire
Issue date:	12/05/1995
From:	DUKE POWER CO.
To:
Shared Package
ML20095B606	List: ML20095B603 ML20095B622
References
NUDOCS 9512110121
Download: ML20095B622 (6)

Text

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i ATTACHMENT 4 PROPOSED TS 3/4.8.2 BASES CHANGE i

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9512110121 951205 PDR ADOCK 05000369

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ELECTRIC POWER SYSTEMS' l

BASES' ll.

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'A.C. SOURCES, D.C. SOURCES =AND ONSITE POWER DISTRIBUTION SYSTEMS (Continued).

-The Surveillance Requirement for. demonstrating the OPERA 8I'LITY of the )

station batteries are based on the recommendations of Regulatory Guide.l.129, l

" Maintenance Testing and. Replacement of Large Lead Storage Batteries for

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Nuclear. Power Plants ~," February 1978, and IEEE Std 450-1980, "IEEE Recommended Practice for Maintenance, Testing, and Replacement of Large Lead Storage i Batteries for Generating Stations and Substations."

L>' Verifying average electrolyte temperature above the minimum for which!

l battery was sized, total battery terminal voltage onfloat charge, connection d

. resistance values and the performance of bettery service and discharge tests  ;

ensures the effectiveness of the charging system, the ability to handle high l

'j discharge rates and compares the battery capacity at that time with the rated '

t capacity.

o I Table 4.8-3 specifies the' normal limits for each designated pilot cell  :

and'each connected cell for electrolyte level, float voltage and specific 4 gravity. The limits for the designated pilot cells float voltage and specific  ;

gravity, greater than 2.13 volts and 0.015 below the manufacturer's full charge specif.ic gravity or a battery charger current that had stabilized at a low <

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value,zis characteristic of a charged cell with adequate capacity. The normal.

n limitsforeachconnectedcellforfloatvoltageandspecificgravity, greater i than 2.13 volts and not more than 0.020 below the manufacturer s full charge .I

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specific gravity with an average specific gravity of 11 the connected cells i not more than 0.010 below the manufacturer's full cF :ge specific gravity, '

e _ ensures the OPERABILITY and capability of the batte j.

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Operation with a battery cell's parameter outside the normal limit but within the allowable value specified in Table 4.8-3 is permitted for up to >

7 days. During this 7-day period: (1) the allowable values for electrolyte

!- level ensures no physical damage to the plates with an adequate electron l

transfer capability; (2) the allowable value for the average specific gravity of all the cells, not more than 0.020 below the manufacturer's recommended full i y charge specific gravity, ensures that the decrease in rating will be less than l the safety margin provided in sizing; (3) the allov able value for an individual  !

4, cell's specific gravity, ensures that an individua' cell's specific gravity

[ .will not be more than 0.040 below.the manufacturer's full charge cpecific.

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i; gravity and that the overall capability of the battery will be maintained l 1

-within.an acceptable limit; and.(4) the allowable value for an individual  ;

e cell's float voltage, greater than 2.07 volts, ensures the battery's capability  ;

p to perform its design function.

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iMcGUIREL- UNITS 1:and 2 B 3/4 8-2 Amendment No. (Unit 1)

L Amendment'No. (Unit.2) is . _ =. - .-- a - -

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~US Nuclear Regulatory Commission Attachment 4 [

- December 5,1 1995- Page 1

'Ingert 1:

i In' SURVEILLANCE 4'8.2.1.2.e, after the battery is returned-to.

i- -service (re-connected to and-supplying its normal DC distribution-center) following a performance discharge test (PDT), no discharge

' testing:shall be done within 10 days.on the other three batteries'.

This.is'.a conservative measure to ensure the tested battery is

-fully charged. - This restriction is an interim measure until the concern regarding. recovered battery capacity immediately following 4-

. recharging is resolved.

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ATTACHMENT 5 FINAL TS PAGES l

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• . e ELECTRICAL POWER SYSTEMS i

SURVEILLANCC y REQUIREMENTS (Continued)

d. At least once per 18 months by verifying that the battery capacity is adequate to either:

1) Supply and maintain in OPERABLE status all of the actual emergency loads for 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> when the battery is subjected to a battery service test, or

2) . Supply a dummy load of greater than or equal to 440 amperes i for 60 minutes while maintaining the battery terminal voltage greater than or equal to 105 volts.

e. At least once per 60 months by verifying that the battery capacity j is at least 80% of the manufacturer's rating when subjected to a performance discharge test. Once per 60-month interval, this i performance discharge test may be performed in lieu of the battery service test required by Specification 4.8.2.1.2d.

f. Annual performance discharge tests of battery capacity shall be given to any battery that shows signs of degradation or has i reached 85% of the service life expected for the application.

Degradation is indicated when the battery capacity drops more than

10% of rated capacity from its average on previous performance i

tests, or is below 80% of the manufacturer's rating.

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c McGUIRE - UNITS 1 and 2 3/4 8-13 Amendment No. Unit 1 l Amendment No. Unit 2

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'e .

ELECTRICAL POWER SYSTEMS l

I BASES A.C. SOURCES. D.C. SOURCES AND ONSITE POWER DISTRIBUTION SYSTEMS (Continued)

The Surveillance Requirement for demonstrating the OPERABILITY of the  !

station batteries are based on the recommendations of Regulatory Guide 1.129

" Maintenance Testing and Replacement of Large Lead Storage Batteries for  !

Nuclear Power Plants," February 1978, and IEEE Std 450-1980, "IEEE Recommended Practice for Maintenance, Testing, and Replacement of Large Lead Storage Batteries for Generating Stations and Substations."

In' SURVEILLANCE 4.8.2.1.2.e, after the battery is returned to service (re-connected to and supplying its normal DC distribution center) following a .

performance discharge test (PDT), no discharge testing shall be done within 10 ,

days on the other three batteries. This is a conservative measure to ensure the tested battery is fully charged. This restriction is an interim measure until the concern regarding recovered battery capacity immediately following recharging is resolved.

Verifying average electrolyte temperature above the minimum for which the battery was sized, total battery terminal voltage onfloat charge, connection resistance values and the performance of battery service and discharge tests ensures the effectiveness of the charging system, the ability to handle high i discharge rates and compares the battery capacity at that time with the rated capacity.

Table 4.8-3 specifies the normal limits for each designated pilot cell and each connected cell for electrolyte level, float voltage and specific gravity. The limits for the designated pilot cells float voltage and specific gravity, greater than 2.13 volts and 0.015 below the manufacturer's full charge specific gravity or a battery charger current that had stabilized at a low value, is characteristic of a charged cell with adequate capacity. The normal limits for each connected cell for float voltage and specific gravity, greater

~

than 2.13 volts and not more than 0.020 below the manufacturer's full charge

! specific gravity with an average specific gravity of all the connected cells

not more than 0.010 below the manufacturer's full charge specific gravity, 4 ensures the OPERABILITY and capability of the battery.  !

i Operation with a battery cell's parameter outside the nonnal limit but within the allowable value specified in Table 4.8-3 is permitted for up to

! 7 days. During this 7-day period: (1) the allowable values for electrolyte l 1evel ensures no physical damage to the plates with an adequate electron transfer capability; (2) the allowable value for the average specific gravity i of all the cells, not more than 0.020 below the manufacturer's recommended full charge specific gravity, ensures that the decrease in rating will be less than j the safety margin provided in sizing; (3) the allowable value for an individual cell's specific gravity, ensures that an individual cell's specific gravity will not be more than 0.040 below the manufacturer's full charge specific

, gradty and that the overall capability of the battery will be maintained

withic an acceptable limit; and (4) the allowable value for an individual i

cell's float voltage, greater than 2.07 volts, ensures the battery's capability

to pertarm its design function.

l McGUIRE - UNITS 1 and 2 B 3/4 8-2 Amendment No. (Unit 1) i Amendment No. (Unit 2)

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