ML20058N731

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Proposed Tech Specs Re Battery Surveillance Requirements & Dc Sources
ML20058N731
Person / Time
Site: Grand Gulf Entergy icon.png
Issue date: 08/10/1990
From:
ENTERGY OPERATIONS, INC.
To:
Shared Package
ML20058N729 List:
References
NUDOCS 9008150013
Download: ML20058N731 (3)
v • d • e


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TABLE 4.8.2.1-1 BATTERY SURVEILLANCE REQUIREMENTS CATEGORY AU) CATEGORY B(2)

Parameter- Limits for each Limits for each -Allowable (3) designated pilot connected cell value for each cell connected cell l J

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Electrolyte > Minimum level  :> Minimum level Above top'of Level indication mark, indication mark, plates, '

and < %" above and < %"-above 'and not 3

maximum level maximum level overflowing indication mark indication mark l Float Voltage > 2.13 volts > 2.13 volts (b). F 2,07 volts 1

Not more than

.020 below the (c) average of all

> 1~190

~

connected cells l (c)

Specifig) > 1.195 Average of all Average of all Gravity connected cells connected cells.

> 1. 200 (c) > 1.190 (C) l (a) Corrected for electrolyte. temperature and level.

  • ((b) May.be corrected for average electrolyte temperature.
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 /> ali'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 limits within~the next 6 days.

(;2) For any Category B parameter (s) outside the limit (s) shown,. the battery-may be considered OPERABLE provided that the Category B parameters are within their allowable 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.

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GRAND GULF-UNIT 1 3/4 8-13 A me,J ue d N o , . ,

~ I 9008150013 900810 PDR ADOCK 05000416 P PDC .

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, ,' NL-kO/OT s ' ELECTRICAL POWER' SYSTEMS I

BASES 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 Batterier for Nuclear Power plants," February 1978, and IEEE Std 450-1980, i "IEEE Rec urended Practice for Maintenance, Testing, and Replacement of Large l Lead Stom;e Batteries for Generating Stations and Substations.".

Verifynig average electrolyte temperature above the minimum for which the battery was sized, total battery terminal voltage onfloat charge, connection 4 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 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 $pecific gravitywithanaveragespecificgravityofalltheconnectedcellsnotmore than 0.010 below the manufacturer s full charge specific ' gravity, ensures the PERABILITY and capability of the battery. 4 Operation with a battery cell's parameter'outside the normal limit but i

)ithintheallowable.valuespecifiedinTable4.8.2.1-1ispermittedforup w

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

i 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 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 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 capability to perform i its design function.

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GRAND GULF- '1 B 3/4 8-2 A%dsed Mo, l

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INSERT TO BASES PAGE B 3/4 8-2 Exceptions to the specific gravity requirements are taken to allow for the normal deviations experienced after a battery discharge and subsequent i recharge associated with a service or performance discharge test. The specific gravity deviations are recognized by.and discussed in IEEE 450-1980.

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A9008031/SNLICFLR - 9 1

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