ML20082C100

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Proposed Tech Specs,Eliminating Repetitious 125/250 Vdc Class 1E Battery Load Cycle Table from TS Currently Located in LGS UFSAR
ML20082C100
Person / Time
Site: Limerick  Constellation icon.png
Issue date: 03/29/1995
From:
PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC
To:
Shared Package
ML20082C097 List:
References
NUDOCS 9504060156
Download: ML20082C100 (7)
v • d • e


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ATTACHMENT 1 -

UMERICK GENERATING STATION UNIT 1 and Unit 2 DOCKET Nos.

50-352 50-353 UCENSE Nos.

NPF-39 NPF-85 TECHNICAL SPECIFICATIONS CHANGE REQUEST NO. 93-25-0

" Removal of 125/250 Vdc Battery Load Cycle Table" AFFECTED PAGES UnN 1 Unk2 3/4 8-11 3/4811 3/4 8-12 3/4 8-12 B 3/4 8-2 B 3/4 8-2 l l

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9504066156'950329 PDR ADOCK 05000352

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, ELECTRICAL POWER SYSTEMS

~ SURVEILLANCE REQUIREMENTS (Continued)' .l

b. At least once per 92 days and within 7 days after a battery discharge  :

with battery terminal voltage below 105 volts or battery overcharge with battery terminal voltage above 150 volts, by verifying-that:

1. The parameters in Table 4.8.2.1-1 meet the Category B limits,
2. .There is no visible corrosion at either terminals or connectors, or the connection resistance of these items is less than 150 x 10-* ohm, and
3. The average electrolyte. temperature of each sixth cell is 2: 60*F.
c. By verifying that:
1. At lease once per 18 months the cells, cell plates and battery' racks show' no visual indication of physical damage or abnormal deterioration,
2. At least once per 18 months the cell-to-cell and terminal connections are clean, tight, free of corrosion and coated with anticorrosion material,
3. At least once per 18 months the resistance of each cell-to-cell and terminal connection is less than or equal to 150 x 10-* ohm excluding cable intercell connections, and
4. At least once per 24 months the battery chargers will supply the currents listed below at a minimum of 132~

volts for at least 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br />.

Charaer Current (Amoeres) 1BCA1 300 IBCA2 300 '

IBCB1 300 1BCB2 300 IBCC 75 18C0 75

d. At least once per 24 months by verifying that either:
1. The battery capacity is adequate to supply and maintain in.

OPERABLE status the required emergency loads for the design duty cycle when subjected to a battery service test, or

2. The battery capacity is adequate to supply a dummy load equivalent to the required emergency loads for the design cycle when subjected to a battery service. test.

l LIMERICK.- UNIT 1 3/4 8-11

myn 7

-ELECTRICALPdWERSYSTEMS SURVEILLANCE RE0VIREMENTS (Continued)

-1 1

.e.' At -least once per 60 months .by'. verifying that the' battery capacity is at  !

least'80% of the manufacturer's rating when subjected to a performance. i

. discharge test. At this once-per 60 month interval, this performance. I discharge test may be performed .in lieu-of the battery service test

-(Specification 4.8.2.1.d).

f.. At least once per 18 months performance discharge tests of battery capacity shall be given to any battery that shows signs of degradation or has reached 85% of the service life expected for the application.

Degradation is indicated when the battery capacity drops more thant10% of -

rated capacity from its average on previous performance tests, or.is below 90% of the manufacturer's rating.

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F LIMERICK - UNIT 1 3/4 6-12

ELECTRICAL' POWER SYSTEMS BASES A.C. SOURCES. 0.C. SOURCES. and ONSITE POWER DISTRIBUTION SYSTEMS (Continued)

" Periodic Testing of Diesel Generator Units Used as Onsite Electric Power Systems at Nuclear Power Plants," Revision 1, August 1977 except for paragraphs C.2.a(3), C.2.c(1), C.2.c(2), C.2.d(3) and C.2.d(4), and the periodic testing will be performed at least once per 24 months. The exceptions to Regulatory Guide 1.108 allow for gradual loading of diesel generators during testing and decreased surveillance test frequencies (in response to Generic Letter 84-15).

The surveillance requirements for demonstrating the OPERABILITY of the units batteries are in accordance with 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," except that certain tests will be performed at least once every 24 months.

i Verifying average electrolyte temperature above the minimum for which the battery was sized, total battery terminal voltage on float 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 discharge rates and compares the battery capacity at that time with the rated capacity.

Table 4.8.2.11 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 specif" gravity with an average specific gravity of all the connected cells not me than 0.010 below the manufacturer's full charge specific gravity, ensur - the OPERABILITY and capability of the battery.

Operation with a battery cell's parameter outside the normal limit but within the allowable value specified in Table 4.8.2.1-1 is permitted for up to 7 days. During this 7-day period: (1) the allowable value for electrolyte level 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 1 the safety margin provided in sizing; (3) the allowable value for an individual l 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 gravity and that the overall capability of the battery will be maintained within an acceptable limit; and (4) the allowable value for an individual cell's float voltage, greater than 2.07 volts, ensures the battery's capa-bility to perform its design function.

l LIMERICK - UNIT 1 B 3/4 8-2

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N ~I " LELECTRICA6 POWER SYSTEMS' ,

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ISURVEILLANCEREQUIREMENTS'(ContinuedF

-- ti. At least once per 92 days and within 7 -days after a batte.ry discharge. j with battery terminal voltage below 105 volts or battery overcharge =

Twith battery, terminal voltage above 150 volts,'by verifying that':

.1;- .The parameters in Table 4.8.2.1-1 meet:the Category B limits, w 2. There is no visible corrosion at either terminals or connectors, '

or-the connection. resistance of these. items isiless-than~

150 x'10-* ohm, and

3. . The average electrolyte temperature of each sixth cell is:;t 60*F. .
c. By verifying that: a

'1. At least once per 18 months'the cells, cell plates and 5 battery racks show no visual indication.of physical damage or abnormal deterioration,-  ;

2. At least once per 18 months the cell-to-cell-and-terminal connections are clean,-tight, free of corrosion and coated with anticorrosion material,--
3. At.least once per 18 months the resistance of 'each' cell-to-cell and terminal connection.is less than or equal to; ,

150 x *10-* ohm excluding cable intercell-connections, and 4 .~ AT least once'per 24 months ~the battery chargers will. a supply the currents listed below at a minimum of 132 j volts for.at.least 8 hour9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br />s:

Charaer Current (Amoeres) 2BCA1 300 .

2BCA2 300 2BCB1- 300-2BCB2 300 2BCC 75-2BCD 75 d.- At lea'st once per 24 months by verifying that either:

i

1. - The battery capacity is adec.uate to supply and maintain in OPERABLE status the requirec . emergency loads. for the design duty cycle when subjected to a battery service test,-

or' ,

, 2. The battery capacity is adequate to supply a dummy load equivalent to the required emergency loads for the design cycle when subjected to a battery service test.

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1 LIMERICK - UNIT-2 3/4 8-11 o

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J v $LEC'TRICAL POWER SYSTEMS

SURVEILLANCE- RE0VIREMENTS (Continued)
e. At least 'once per 6O months by. verifying that the battery capacity is at least 80% of the manufacturer's rating when subjected to:a performance.

'- discharge test. At. this once per 60 month interval, this performance.

discharge test may- be performed in lieu of the battery . service test (Specification 4.8.2.1.d).

~

- f. At least _ once per 18 months performance discharge tests of battery .

capacity shall be given to any battery that shows signs of degradation or has 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 tests,'or is below 90% of the manufacturer's rating.

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I LIMERICK - UNIT 2 3/4 8-12 i

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'E'LACTRICALPOWERSYSTEMS i

BASES A.C. SOURCES. D.C. SOURCES. and ONSITE POWER DISTRIBUTION SYSTEMS (Continued) ,

l Supplies, " March 10, 1971, Regulatory Guide 1.137 " Fuel-Oil Systems for Standby Diesel Generators," Revision 1, October 1979 and Regulatory Guide 1.108, " Periodic ,

Testing of Diesel Generator Units Used as Onsite Electric Power Systems at Nuclear l Power Plants," Revision 1, August 1977 except for paragraphs C.2.a(3), C.2.c(1),

C.2.c(2), C.2.d(3) and C.2.d(4), and the periodic testing will be performed at least i once per 24 months. The exceptions to Regulatory Guide 1.108 allow for gradual loading l of diesel generators during testing and decreased surveillance test frequencies (in response to Generic Letter 84-15).

The surveillance requirements for demonstrating the OPERABILITY of the units batteries are in accordance with 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," except that certain tests will be performed at least once every 24 months.

Verifying average electrolyte temperature above the minimum for which the battery was sized, total battery terminal voltage on float 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 discharge rates and compares the battery capacity at that time with the rated capacity.

Table 4.8.2.1-1 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 adecuate capacity. The normal -

limits for each connected cell for float voltage anc 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, ensures the OPERABILITY and capability of the battery.

Operation with a battery cell's parameter outside the normal limit but within the allowable value specified in Table 4.8.2.1-1 is permitted for up to 7 days. During this 7-day period: (1) the allowable value for electrolyte level ensuris no physical damage to the plates with an adequate electron 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 charge specific gravity ensures that the decrease in rating will be less than 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 c gravity and that the overall capability of the battery will be maintained within 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 capa-bility to perform its design function.

1 LIMERICK - UNIT 2 B 3/4 8-2

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