ML20053E885

Proposed Tech Specs 3.8.2.3,3/4.8.1 & B 3/4 8-2 Re Limiting Conditions & Surveillance Requirements for Station Batteries

ML20053E885
Person / Time
Site:	Beaver Valley
Issue date:	06/03/1982
From:	DUQUESNE LIGHT CO.
To:
Shared Package
ML20053E877	List: ML20053E876 ML20053E878 ML20053E885
References
NUDOCS 8206100174
Download: ML20053E885 (6)

Text

,- ELECTRICAL POWER SYSTEMS D.C. DISTRIBUTION - OPERATING m

LIMITING CONDITION FOR OP RATION 3.8.2.3 The following D.C. bus traica shall be energized and OPERABLE:

TRAIN "A" (orange) consisting of 125-volt D.C. busses No. 1-1 & 1-3, 125-volt D.C. battery banks 1-1 & 1-3 & chargers 1-1 & 1-3.

TRAIN "B" (purple) consisting of 125-volt D.C. busses No. 1-2 & 1-4, 125-volt D.C. battery banks 1-2 & 1-4 and chargers 1-2 & 1-4 APPLICABILITY: MODES 1, 2, 3 and 4.

ACTIONt

a. With one of the required battery banks inoperable, restore the inoperable battery bank to OPERABLE status 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 HOT STANDBY within the next 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> and in COLD SHUTDOWN within the following 30 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br />.

b. With one of the required full capacity chargers inoperable, demon-strate the OPERABILITY of its associated battery bank by performing Surveillance Requirement 4.8.2.3.2.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 3.8-1 is not met, declare the battery inoperable.

SUR'iEILLANCE REQUIREMENTS 4.8.2.3.1 Each D.C. bus train shall be determined OPERABLE and energized at least once per 7 days by verifying correct breaker alignment and indi-cated power availability.

4.8.2.3.2 Each 125-volt battery bank and charger shall be demonstrated OPERAELE:

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

1. The parameters in Table 3.8-1 meet the Category A limits, and

2. The total battery terminal voltage is greater than or equal to 127.8 - volts on float charge.

BEAVER V ALLEY- U NIT 1 3/4 8-8 P206100174 820603 PDR ADOCK 05000334 P PDR Proposed Nording

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• ELECTRICAL POWER SYSTEMS SURVEILLANCE REOUIREMENTS (Continued)

b. At least once per 92 days and within 7 days after a battery discharge 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 3.8-1 meet the Category B limits,

2. The average electrolyte temperature of every tenth cell of connected cells 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, 4

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

3. The resistance of each cell-to gell and terminal connection is less than or equal to 150 x 10 ohms; and

4. The battery charger will supply at least (100) amperes at 140 -volts for at least (4) hours.

d. At least once per 18 months, during shutdown, by verifying that the battery capacity is adequate to supply and maintain in OPERABLE status all of the actual or simulated emergency loads for the 2-hour design duty cycle when the battery is subjected to a battery service test.

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

l f. At each refueling outage with the station shutdown, performance dis-l charge tests of battery capacity shall be given to any battery that shows signs of degradation. Degradation is indicated when the battery capacity drops more than 10% of rated capacity from its average on

. previous performance tests.

I BEAVER VALLEY - UNIT 1 3/4 8-9 Proposed Wording

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TABLE 3.8- 1 }

BATTERY SURVEILLAt1CE RE0VIREME?iTS 1

CATEGORY A(1) CATEGORY B(2) k Parameter Limits for each Limits for each A11cwable(3) designated pilot connected cell value for each cell connected call i

Electrolyte > Minimum level > Minimum level Above top of l Level indication mark, indication mark, plates, l and < h" above and < h" above and not l maxiEum level maxi 5um level overflowing l indication mark indication mark r l

Float Voltage > 2.13 volts > 2.13 volts (c)

> 2.07 volts ,

l Not more than  !

I

.020 below the average of all I

> 1.195 connected cells Specifi > 1.200(b) f Gravity {a)

Average of all Average of all i; connected cells connect i

> 1.205 >1.195g) cells t

4 (a) Corrected for electrolyte temperature and level.  !

(b) Or battery charging current is less than (2) amps when on charge. l (c) Corrected for average electrolyte temperature. [-

(1) For any Category A parameter (s) outside the limit (s) shown, the battery

-l 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 limits f within the next 6 days. l (2) For any Category B parameter (s) outside the limit (s) shown, the battery l may be considered OPERABLE provided that the Category B parameters are j within their allcwable 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.  ;

ihumbers in paretheses assume a manufacturer's recc. . ended full chargel

{specificgravityof1.215. l 3/4 S-9a BEAVER VALLEY - L'n~' 1 Proposed '4ording

3/6.8 ELECTRICAL POWER SYSTEMS BASES 3/4.8.1, 3/4.8.2 A.C. SOURCES, D.C. SOURCES AND ONSITE POWER DISTRIBUTRION SYSTEMS The OPERABILITY of the A.C. and D.C. power sources and associated distribution systems during operation ensures that sufficient power will be available to supply the safety related equipment required for 1) the safe shutdown of the facility and 2) the mitigation and control of accident cond-itions within the facility. The minimum specified independent and redundant A.C. and D.C. power sources and distribution systems satisfy the requirements of Geueral Design Criterion 17 of Appendix "A" to 10 CFR 50.

The ACTION requirements specified for the levels of degradation of the power sources provide restriction upon continued facility operation commensurate with the level of degradation. The OPERABILITY of the power sources are consistent with the initial condition assumptions of the safety analyses and are based upon maintaining at least one redundant set of onsite A.C. and D.C.

power sources and associated distribution systems OPERABLE during accident conditions coincident with an assumed loss of offsite power and single failure of the other onsite A.C. source.

The OPERABILITY of the minimum specified A.C. and D.C. power sources and associated distribution systems during shutdown and refueling ensures that

1) the facility can be maintained in the shutdown or refueling condition for extended time periods and 2) sufficient instrumentation and control capability l is available for monitoring and maintaining the unit status.

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."

l Verifying average electrolyte temperature above the mininum for which the l 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 l discharge rates and compares the battery capacity at that time with the rated l capacity.

Table 3.8-1 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 l gravity, greater than 2. l3 volts and .0L5 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.l3 volts and not more than .020 below the manufacturer's full charge specific gravity with an average specific gravity of all the connected cells j not more than .010 below the manufacturer's full charge specific gravity, l ensures the OPERABILITY and capability of the battery.

l BEAVER VALLEY - UNIT 1 B 3/4 8-1 l Proposed Wording

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,- ELECTRIC POWER SYSTEMS

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

Operation with a battery cell's parameter outside the normal limit but within the allowable value specified in Table 3.8-1 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 the cells, not more than .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 indiv-idual cell's specific gravity, ensures that an individual cell's specific gravity will not be more than .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 i individual cell's float voltage, greater than 2,07 volts, ensures the bat-tery's capability to perform its design function.

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BEAVER VALLEY - UNIT 1 B 3/4 8-2 Proposed Wording i

I k

a Attachment B The proposed Technical Specification revisions are in accordance 4

with IEEE 450-1980 and the Standard Technical Specification (NUREG-0452, Revision 4)

The Surveillance Requirements were revised to include quarterly visual inspection, electrolyte temperature measurements, and terminal resistance measurements and an annual performance discharge test fo r batteries which show signs of degradation. Surveillance Requirements are at least as stringent as existing requirements with the exception i of deleting the limit on individual cell voltage deviation from acceptance i value. This requirement is no longer recommended in IEEE 450 or the Standard Technical Specifications.

4 i The BASES vere revised to reflect the changes to the Surveillance

! Requirements.

Therefore, the proposed technical specification changes will not result in significant increases in malfunctions because equal or greater assurance of system operability is provided.

The OSC and ORC have reviewed this proposed change and based on the

above safety evaluation, it is concluded there is reasonable assurance that the public health and safety will not be endangered by operation

! in the proposed manner.

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