ML17213B050

Proposed Tech Specs 3/4.8.2.3 Re Battery Surveillance Requirements

ML17213B050
Person / Time
Site:	Saint Lucie
Issue date:	02/16/1983
From:	FLORIDA POWER & LIGHT CO.
To:
Shared Package
ML17213B049	List: ML17213B048 ML17213B050
References
NUDOCS 8302230451
Download: ML17213B050 (5)

Text

t5'LECTRICAL POWER SYSTEMS D.C. D IS TRI BUT I OH - I OP E RAT NG LIMITING CONDITION FOR OPERATION 3.8.2.3 As a minimum the following D.C. electrical sources shall be OPERABLE:

a. 125-volt D.C. bus No. 1A, 125-volt Battery banl Ho. 1A and a full ca paci ty ch a rg e r.

b. 125-volt D.C. bus No. )B, 125-volt Battery bank Ho. 1B and a full c apaci ty cha r ger.

APPLICABILITY: NODES 1, 2, 3, and 4.

ACTION:

a ~ With one of the required battery banks or busses inoperable, restore the inoperable battery bank or bus 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 STAHDBY within the next 6 "hours 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 />.

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b. With one of the required full capacity chargers inoperable, demonstrate the OPERABILITY of its associated battery oanks by performing Surveil lance Requirement 4.8.2.3.2.a.l. wi thin 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br />, 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 is not met, declare the battery inoperable.

SURVEILLANCE REQU IRENENTS 4.8.2.3.1 Each D.C. bus train shall be determined OPERABLE and energized at least once per 7 days by verifying indicated power availability.

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

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

1. The parameters in Table 4.8-2 meet the Category A limits, and

2. The total battery terminal voltage is greater than or equal to 129-volts on float charge.

830223045i 8302i6 PDR ADOCK 05000335 P . PDR ST. LUCIE - UNIT 1 3/4 8-10

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~ . ELECTRICAL POWE . YSTENS SUREVILLANCE REQUIREMENTS 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, oy verifying that:

1. The parameters in Table 4.8-2 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- ohms, and 3..The average electrolyte temperature of l(g (60 cells total) of connected cells is above 50'F.

c~ At least once per 18 months by verifying that:

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, and coated with anti-corrosion material,

3. The resistance of each cell-to-cell and terminal connection is less than or equal to 150 x 10 ohms, and The battery charger will supply at least 300 amperes at 140 volts for at least 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br />.

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

e. At least once per 60 months, during shutdown, by verifyi ng tnat the battery capacity is at least 8(5 of the manufacturer's rating when .

subjected to a performance discharge test. This performance discharge test may be performed in leiu of the battery service test required by Surveillance Requirement 4.8.2.3.2.d.

Annual performance discharge tests of battery capacity shall be given to any battery that shows signs of degradation or has reacned 855 of the service li fe expected for the application. Degradation is indicated when the battery capacity drops more than 10'f rated capacity from its average on previous performance tests, or is below 90$ of the manufacturer's rating.

ST. LUCIE - UNIT 1 3/4 8-11

TABLE 4.8-2 BATTERY SURVEILLANCE REQUIREMENT CATEGORY A CATEGORY B Parameter Limits for each Limits for each Allowable( )

designated pilot connected cell value fo r eacn cell connected cell Electrolyte >Hi nimum level >Minimum level Above top of Level indication mark, indication mark, plates and not, and < 1/4'bove and < 1/4'bove ove rf1 owi ng maximum level maximum level indication mark indication mark Float Voltage > 2.13 volts > 2.13 volts( ) > 2.07 volts Speci fic > 1.195( > 1.190 Not more than Gravity( ) .020 below the Average of all average of all connected cel ls connected cells

> 1.200 Average of al connected cells

> 1.190( )

(a) Corrected for electrolyte temperature and level.

(b) Or battery charging current is less than 2 amps when on charge.

(c) 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 /> 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 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 8 parameters are within their allowable values and provided the Category B parameter(s) are restored to within limits within 7 days.

(3) With any Category B parameter not within its al lowaole value, declare the battery inoperable.

ST. LUCIE - UNIT 1 3/4 8-12

I pa ~ ~a p ~e Re: St. Lucie Uni Docket No. 50~5 Proposed License Amendment 0

D.C. Distribution SAFETY EVALUATION The present St. Lucie Unit gl safety related D.C. System is being modified to be identical to the St. Lucie Unit g2 system.

The Technical Specification Surveillance requirements for demonstrating the Operability of the Station batteries are based on the recommendation 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 Reccmmended Practice for Maintenance, Testing and Replacement of Large Lead Storage Batteries for Generating Stations and Substations."

The Surveillance requirements enccmpass discharge and charge testing and include monitoring electrolyte temperature, cell specific gravity and voltage, total battery terminal voltage, float voltage and connection resistance values. The maintenance procedure and the discharge/charge test ensures the battery system capability to perform its design functions.

Based on this, the proposed Technical Specification change is canplete and technically acceptable and does not constitute an unreviewed safety question.