ML20066E748

Proposed Tech Specs Deleting Spec 4.8.2.1.d.2 Re Specific Dc Battery Load Profiles

ML20066E748
Person / Time
Site:	Grand Gulf
Issue date:	01/11/1991
From:	ENTERGY OPERATIONS, INC.
To:
Shared Package
ML20066E743	List: ML20066E742 ML20066E748
References
NUDOCS 9101220234
Download: ML20066E748 (6)

Text

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N ELECTRICAL POWER SYSTEMS 3/4.8.2 0.C. SOURCES Q Lh 4't0rl 0.C. SOURCES - 0_P_ERATING

, LIMITING CONDITION FOR OPER,ATION 3.8.2.1 OPERABLE:

As a minimum, the following D'C. electrical power sources shall be

a. Division 1, consistinf of:

1. -125 volt battery 1A3.

2. 125 volt full capacity charger 1A4 or 1AS.

b. Olvision 2, consisting of:

1. 125 volt battery 183.

2. 125 volt full capacity charger 184 or 185, j i

c. Division 3, consisting of:

1. 125 volt battery 103.

2. 125 volt full capacity charger 104.

APPLICABILITY: OPERATIONAL CONDITIONS 1, 2 and 3.

ACTION:

a.

With either Division 1 battery or Division 2 battery of the above required 0.C. electrleal power sources inoperable, restore the ,

1 inoperable division battery to OPERABLE Jtatus within 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> or be in at least within HOT SHUT the following 00WN within the next 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> and in COLD SH 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />.

b.

With Division 3 battery of the above required D.C. electrical power sources inoperable, declare the HPCS system inoperable and take the ACTION required by Specification 3.5.1.

-i c.

With one of the above required full capacity charger) inoperable, demonstrate the OPERABILITY of its associated battery bank by performing Surveillance Requirement 4.8.2.1.a.1 within one hour and at least once per 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> thereafter. If any Category A-limit in Table 4.8.2.1-1 is not met, declare- the battery inoperable.

OPERATIONAt.

pereitted.. CONDITION changes per Specification 3.0.4 are not ,

i-GRAND GULF-UNIT 1 3/4 8 Amendment No.-69 l p

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'. (LECTRICAL Poi!ER SYSTEMS for d@0,M0 d )

$URVEILLANCE RE0VI AEMENT5 4.8.2.1 Each of the above required 125 volt batteries and chargers shall be demonstrated OPERABLE:

a. At least once per 7 days by verifying that:

1.

The and parameters in Table 4.8.2.1-1 meet the Category A limits,

2. Total battery terminal voltage is greater than or equal to '

129 volts on float charge, b.

At least once per 92 days.and within 7 days af ter a battery dischstge with battery terminal voltage below 110 volts, or battery overcharge with battery terminal voltage above 150 volts, by verifying that: '

1.

The parameters in Table 4.8.2.1-1 seet the Category B limits, 2.

There is no visible corrosion at either terminals or connectors, or 150the connection x 10 resistance of these items is less-than 8 ches, and 3.

The average electrolyte temperature of every sixth connected cells a is above 60'F.

c.

At least once per 18 months by verifying that:

1.

The cells, cell plates and battery racks show no visual-indication of physical damage or abnormal deterioration, 2.

The cell to cell and terminal connections are clean, tight, free of corrosion and coated with anti corrosion material.

3.

3 The resistance of each cell and terstnal connection _is less than or equal to 150 x 10 8 ches, and 4

The battery charger will supply:

a) For Divisions l'and 2, at least 400 amperes at a minimum of 125 volts for at least 10 hours1.157407e-4 days <br />0.00278 hours <br />1.653439e-5 weeks <br />3.805e-6 months <br />, b) For Division 3, at least 50 esperes at a minimum of 125 volts for at least 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br />.

GRAND GULF UNIT 1 3/4 8 11

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NL-9 O/O"'I ELECTRICAL POWER SYSTEMS sui (VEILLANCE REQUIREMENTS (Continued, 1

I d.

At least once per 18 months,'durina shut wn, by verifying the dit M r.

Or s\mQs X [ status all of the actuallemergency loads for 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br /> int sions 1_and 2 and 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br />.for Division 3 when the batt tj .s subjected to a battery service test q  ;

Thebatterycapacityisadequatetosupplyadummyloa[of e  ;

following profile, which is verified to 3e greater than y

etual emergency load. While maintaining the battery _ t inal age greater thar or equal to 105 volts, a) D sion 1  !

>950'am res for the first 60 recond 7228 ampe for the next 119 min s 5399 ?mperes or the next 60.se ds_

5228 amperes f . the next 11 inutes 1 7416 amperes-for. e._last -seconds b) 0,jvision2

>452 amperes for' e first seconds 5221 amperes- the next 119 ' utes 5392 a' mpere' for the next 60 seco s 5221 amp s-for the next'118 minut 5278-a eres for'the last 60 sc onds D fision 3 c) '

>76 amperes for the first 60 seconds.

516 amperes for the next 59 minutes 518 amperes for-the last 60 minutes e.

At least once per 60 months during shutdown by verifying that' the battery capacity is -at- least 80% of the manufacturer's rating when _  ;

. subjected to a performance discharge test. Once per 60 month--

intervai, this performance discharge test may be performed in lieu ,

of the, battery service. test. -j

f. Annual performance discharge tests of battery capacity shall be given to any battery that shows signs-of degradation.or_ has: reachec' 85% of the-service life expected for the application. Degradation l is indicated when the battery capacity drops more than 10% of rated ,

s capacity from its averapo on previous performance tests, or is below 90%-of the manufacturer s rating.

GRAND GULF-UNIT 1 3/4 8-12 Amendment No.180)

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TABLE 4.8.2.1 BA E ' SURVEILLANCE REQUIREMENTS CATEGORY A(1) CATEGORY B(2)

Parameter Li:::its for each Limits for each Allowable (3) designa dd pilot connected cell cell value for each ,

connected cell l l

Electrolyte > Minimum level > Minimum level Above top of Level indication mark, indication mark, plates, and < \" above and < " above and not maximum level maximum level overflosing indication mark indication mark 44 Float Voltage 1 2.13 volts > 2.13 volts (b) > 2.0' volts Not more than

.020 below the average of all

> 1.190 e,onnected calls Specific > 1.195(c) Average of all Average of all I Gravity (a) connected cells tonnected cells

> 1.200 > 1.'190(c) I t

(a) Corrected for electrolyte temperature and level.

(b) May be corrected for average el utrolyte temperature.

(c) 01 bettery charging current, following a battery service or performance discharge test, is less than 2 amps when on float charge.

(1) 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 <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> all the Category B measurements are taken and found to be within their allowable values, and provided all Category A and B parameter (s) are restored to within imits within the next 6 days, (2) For any Category B pirameter(s) outside the limit (s) shown,'the battery may be considered O'ERABLE providad that the Category B parameters are within their allo.<able values and provided the Category 8 parameter (s) are restored to within limits within 7 days.

(3) Any Category B parameter not within its allowable value indicates an inoperable battery.

, JAND GUC-UNIT 1 3/4 8-13 Amendment No. 11 W>

em NL 90/o7 ELECTRICAL POWER SYSTEMS BASES f A.C. SOURCES, D.C. SOURCES and ONSITE POWER DISTRIBUTION SYSTEMS (Continued)

The surveillance requirements for demonstrating the OPERABILITY-of the unit batteries are in accordance with the recommendations of Regulatory Guide 1.129 " Maintenance Testing and Replacement of Large Lead Storage i Batteries for Nuclear Power Plants," February 1978, and IEEE Std 450-1980, "IEEE L:ommended Practice for Maintenance, Testing, and Replacement of Large Lead Storage Batteries for Generating Stations and Substations.".

Verifying average electrolyte tenperature above the_ minimum for which the battery was sized, total battery tertrinal 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 discharge rates and compares the battery capacity at that time with the. rated capacity.

TE ER 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 desianated pilot cells-float voltage and specific gravity, greater than 2.13 volts .nd 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 gravitywithanaveragespecificgravityofalltheconnectedcellsnotmore than 0.010 below the manufacturer s full charge specific gravity, ensures the OPERABILITY and capability of the battery. E~ceptions to the_ specific gravity requirements are taken to albw for _the normal deviations experienced after a battery discharge and sub, squent recharge associated with ai service or per-formance discharge test. TM specific gravity deviations are recognized by and discussed in IEEE 450-1510.

Operation with a battery coll'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 values- 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 of all a 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 incMvidual 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 captbility to perform its design fur.ction,

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i GRAND GULF-UNIT 1 B 3/4 8-2 Amendment =No. 71)

NL-90/07 INSERT TO PAGE-B 3/4 8-2 n ./ --

The simulated emergency ' load prof fle used for t.he bat tery service test of-Surveillance Requirement 4.8.2.1.d is verified to be at lenst equivalent to the actual emergoney load porlie and is based on anticipated operation 9 required after an AC power loss during accident conditions as described in the Updated Finni Safety Analysis Report (UFSAR). The simulated emergency load proflies for the three divisional battorier, are defined and located in the UFSAR Section 8.3. _.

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