Text

Proposed Tech Specs Re Battery Specific Gravity Changes
	ML20137X810
Person / Time
Site:	Limerick
Issue date:	04/09/1997
From:	; PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC
To:	;
Shared Package
ML20137X798	List: ML20137X793; ML20137X810;
References
	NUDOCS 9704220173
	Download: ML20137X810 (6)
	v • d • e

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i ATTACHMENT 2 i l i LIMERICK GENERATING STATION l UNITS 1 AND 2 ]

LICENSE CHANGE REQUEST ,

NO. 96-24-0 l l

AFFECTED PAGES UNIT 1 UNIT 2 3/4 8-13 3/4 8-13 B 3/4 8-2 B 3/4 8-2 1

i l 1-h l

l 9704220173 970409 PDR ADOCK 05000352-p PDR

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-A U A O'. Q N i O e Cis % , R.iB-m-+e tr.

rm u w w TABLE 4.8.2.1-1 .

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. BATTERY SURVEILLANCE REOUIREwENTS i CATEGORY AN) CATEGORY B 5I) -

l Parsneter Li1mits for each 1

! Limits for each A11owable53) -

desi gnated. '

pilot connectad call value for each l cvil *

. connected cell Electrolyte l .>Minimus level >Minimus level Above top of Level ine.1 cation' mark, l indication mark, plates, and < " above and ~< 4" above and not .

eaximum level maxia'us level overflowing indication mark indication mark .

Float Voltage > 2. D volts 3,2.13 volts l4) > 2.07 volts NM2h\10 i

[ ot/ncre/tha 0.020 below

~

Specific Gravity

> 1.19350) > 1.190 abra ma ' oofce(1s al1 [)

hM j YAN D AND^$

Cr, T# L

_. M _ all f 7verage~of all connected calls. connected cells

> 1.200

> 1.190(6) l I { )For any Category A parameter (s) outside the 11eit(s) shown, the battery say be considered CPERABLE provided that within 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months all the Category 8 measurements are taken and found to be within iJair allowable values, and

provided all Category A e.d 8 parameter (s) are restored to wi'.nin limits within the next 6 days.

(2)For any Category B parametar(s) outside the limit (s) shown , the batten may be considered OPEAABLE provided that the Category 8 parameters are within their allowable values and provided the Category 8 parameter (s) are restored to within limits within 7 days.~

(3)Any Category 8 parameter not within its allowable value indicates an inoperable battery, pgtgg g (4)May be corrected for average electrolyta temperature.

0) Corrected for electrolyte temperature of 77'F(and[ful[h TO C{

(6)Cr battery charging current is less than 1 amperes when on float charge.

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. LIMERICK - UNIT 1 3/4 8-13 0 1.

1 1 -" " * ' ' - - . . . . . . . . . . . .. . _ . - . . .

9

ANemM ' u r

.ELECTMCAL DOWER SYSTEMS N DWl@

y . ,, -

n__ i A.C? SOUR 8ES. D.C. SOURCES. and ONSITE POWER DISTRIBUTION SYSTE

" 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 OPERA 81LITY of the units batteries are in accordance with the recosumendations 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 Reconnended Practice for Maintenance, Testing, and Replacement of Large Lead Storage .

l Batteries for Generating Stations and Substations, 3 cept that certain tasts will ha performed at least once every 24 months.

AD6Insed. Al PL-92h',

Verifying average electrolyte temperature above trie 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 h2.11 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 j value, is characteristic of a charged cell with adequate capacity. The normal ] 'i Jd j f than 2.13 volts and not more than 0.020 below the manufacturer's I fullJd A chi 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, kp b1 ensures the OPERABILITY and capability of the battery.

$I he Q 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 g g 7 days. During this 7-day period: (1) the ' allowable value for electrolyte ..

d" I

k level ensures no physical damage to the plates with an adequate electron T

I transfer capability; (2) the allowable value for the average specific gravity l i of all the cells, not more than 0.020 below the manufacturer's recommended full N I 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 d 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 g 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- V' I bility to perform its design function. !

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x 1 I l LIMERICK - UNIT 1 B 3/4 8-2 Amendment No. 4 , 71 Corrected by letter dated June 19. 1995 m b. g -9 , p- 3m9 ----r-

l ^" CW ME ra W C %- Jy2i8 ,

TABLE 4.8.2.S.-1 m, ar - .- i

.mu 2 )

BATTERY SURVEILLANCE REOUIREMENTS l

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CATEGORY AN) CATEGORY B(2) ,

\

Parameter Limits for each Limits for eacn Allowaole U.)

designated pilot connected cell value for each .

l cell connected cell l Electrolyte > Minimum level > Minimum level Above top of ,

i Level indication mark, indication mark, plates, '

! and < Is" above ana < %" above and not maximum level maxiaum level overflowing i indication mark indication mark j l f Float voltage ) 2.13 volts > 2.13 volts O)

> 2.07 volts l

1 l

'( ;o 4) _ if ry'tpa l

.)0beow h Specific ) averag o a

! Gravity > 1.195(6) > 1.190 ontecafca l

> 2 -

AND '

l A'ol4 g T AND _- - - = -

l ,, m Average of all_ _ - - Average o 11

- . , - - connected cells connectec cells l .

> 1.200 > 1.190(6) 51)For any Category A parameter (s) outside the limit (s) shown, the battery may be considered OPERABLE provided that within 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months all the Category B measurements are taken and found to be within their allowable values, and l .

provided all Category A and B parameter (s) are restored to within limits +

l within the next 6 days.

(2)For any Category B parameter (s) outside tne limit (s) shown, the battery !

say be considered OPERABLE provided that the Category B parameters are within their allowable values and provided the Category B parameter (s) are restored to within limits within 7 days.

l (3)Any Category B parameter not within its allowable value indicates an l inoperable battery. M LE l'E N i (4)May be corrected for average electrolyte temperature.

-"; ; ; S F D

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(5) Corrected for electrolyte temperature of 77*F and full level (6)0r battery charging current is less than 1 amperes when on float charge.

gg 5W l LIMERICK - UNIT 2 3/4 8-13 l

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_zu g e4 h l

MECTRfCAL POWER SYSTEMS M %- 0M BASES @

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

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 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 l 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 " cept that m tain tests will be _

performed at least once every 24 months.

ADD Enser+_ A gr '4/. ;, ;-

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 __ i discharge rates and compares the battery capacity at that time with the rated capacity.

, [' Table 4.8.2.1-1 specifies the normal limits 5r each designated pilot cell and each connected cell for electrolyte level, float voltage and specific l The limits for the designated pilot cells float voltage and specific I

f gravity. gravity, greater than 2.13 volts and 0.015 below the manufacturer's full charg

^

! I specific gravity or a battery charger current that had stabilized at a low \

l value, is characteristic of a charged cell with adequate capacity. The nomal N l I limits for each connected cell for float voltage and specific gravity, greater ft i

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

specific gravity with an average specific gravity of all the connected cells 7 not more than 0.010 below the manufacturer's full charge specific gravity, o ensures the OPERABILITY ar.d capability of the battery. A 1 Operation with a battery cell's parameter outside the normal limit but I 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 f

! I 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 p l 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 l will not be more than 0.040 below the manufacturer's full charge soecific l

gravity and that the overall c5 ability of the battery will ce maintained ed

{ within an acceptable limit; and (4) the allowable value for an individual V' cell's float voltage, greater than 2.07 volts, ensures the battery's capa-i bility to perform its design function.

i LIMERICK - UNIT 2 8 3/4 8-2 Amendment No. 34 Corrected by letter dated June 19, 1995

LGS UNIT 1 AND 2 TECH SPEC BASES CHANGE FOR PAGE B 3/4 8-2 INSERT A and IEEE Standard 450-1995, "lEEE Recommended Practice for Maintenance, Testing, and Replacement of Vented Lead-Acid Batteries for Stationary Applications."

I INSERT B The parameters in Table 4.8.2.1-1 are based on the manufacturer's recommendation. These parameters assure the OPERABILITY and capability of the battery to perform its design function.

The Category A and B limits are specified for each designated pilot cell and l

each connected cell for electrolyte level, float voltage and specific gravity. Parameters within the Category A and B limits are characteristic of a fully charged cell. The limits for the float voltage and specific gravity for each connected cell and the average specific gravity of all of the connected cells ensures the OPERABILITY and capability of the battery.

The Category B allowable value for electrolyte level provides assurance that the plates are covered and adequate electron transfer will occur between the platesc The allowable value for cell voltage provides assurance that the cell is not discharged and the battery is capable of performing its design function. The allowable value for specif!c gravity for an individual cell provides assurance that the overall capability of the battery will be maintained within acceptable limits. The allowable value for the average specific gravity of all the cells ensures that the decrease in rating will be less than the safety margin provided in the battery sizing.

With parameters of one or more cells, in one or more batteries, not within limits (i.e., Category A limits not met or Category B limits not met, or Category A and B l limits not met) but within the Category B allowable value specified in Table 4.8.2.1-1, operation is permitted for seven (7) days. Verification that the Category B allowable values are met, provides assurance that during the time needed to restore the parameters to the Category A and B limits, the battery is still capable of performing its' intended function. For indication outside Category A, a period of 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months is allowed to complete the requirement because specific gravity measurements must be taken for each connected cell. The specific gravity Category A limit and the Category B allowable value for each connected cell and the average of all connected cells is modified by Note 6. This note allows the use of charging current to verify the battery's state of charge. Charging current stability at a low rate is an indication that the battery is fully charged. This method provides a reliable measure of the battery's state of charge.

Continued operation is only permitted for seven (7) days before the battery cell parameters must be restored to within Category A and B limits. Taking into consideration that, while battery capacity may be degraded, sufficient capacity exists, based on meeting the Category B allowable values, to perform the intended function and to allow time to restore the battery cell to its normal limits. When any battery parameter for each connected cell is outside the Category B allowable value, sufficient capacity to supply the maximum load requirement is not assured and the corresponding dc electrical power l subsystem (i.e., battery) must be declared inoperable.

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ML20137X810

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