ML17348A977

Proposed Tech Specs 3/4.8.2,revising Surveillance Requirements on Battery Chargers

ML17348A977
Person / Time
Site:	Turkey Point
Issue date:	07/02/1991
From:	FLORIDA POWER & LIGHT CO.
To:
Shared Package
ML17348A976	List: ML17348A975 ML17348A977
References
NUDOCS 9107100222
Download: ML17348A977 (4)

Text

ATTACHMENT 3 PROPOSED TECHNICAL SPECIFICATION Marked-up Technical Specifications Page, 3/4 8-14 B 3/4 8-5 9107100222 910702 PDR ADOCK 05000250 P PDR

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ELECTRICAL POMER SYSTEMS BASES Continued The Surveillance Requirements for demonstrating the OPERABILITY of the diesel generators are in accordance with the recommendations of Regulatory Guides 1.9, "Selection of Diesel Generator Set Capacity for Standby Power Supplies," March 10, 1971; 1. 108, "Periodic Testing of Diesel Generator Units Used as Onsite Electric Power Systems at Nuclear Power Plants," Revision 1, August 1977; and 1. 137, "Fuel-oil Systems for Standby Diesel Generators,"

Revision 1, October 1979.

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 is available for monitoring and maintaining the unit'tatus.

During a unit shutdown, the one required circuit between the offsite transmission network and the onsite Class lE Distribution System can consist of at least the associated unit star tup transformer feeding one 4160 volt Bus A or B, or the opposite unit's startup transformer feeding the associated unit's 4160 volt Bus A, or the associated unit's 4160 volt Bus A or B backfed through its auxiliary transformers with the main generator isolated.

As inoperability of numerous electrical components often affect the operation of the opposite unit, the applicability for the shutdown LIMITING CONDITION FOR OPERATION (LCO) for A.C. Sources, D.C. Sources and Onsite Power Distribution all contain stateaents to ensure the LCO's of the opposite unit are considered.

The allowable out-of-service time for the D.C. busses is 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> with one unit shutdown in order to allow for required'attery maintenance without requiring both units to be shutdown. Provisions to substitute the spare battery for any one of the four station batteries have been included to allow for battery maintenance without requiring both units to bi shutdown. The requirement to have only one OPERABLE battery charger associated with a required battery bank permits maintenance to be conducted on the redundant battery charger.

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The minim>a number of battery chargers required to be OPERABLE is based on the following criteria:

1) A miniam of one battery charger per bus with each powered from a separate 48O volt HCC is required to satisfy the single failure criteria when assming the failure of a MCC. This restriction prohibits the use of two chargers powored floe the saae bus for meeting the minimum requirements.

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D.C. SOURCES LIMITIKG CONDITION FOR OPERATION ACTION: (Continued)

b. With one of the required battery banks inoperable, or with none of the full-capacity chargers associated with a battery bank OPERABLE, 0 restore all battery banks to OPERABLE status and at least one charger

~ f~~ associated with each battery bank to OPERABLE status within two hours" or be in at least HOT STANDBY 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 COLO SHUTDOWN within the following 30 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br />. This ACTION applies to 0 both units simultaneously.

~+ ' URVEILLANCE RE

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UIREHENTS Continued Q

g C .8.2. 1 Each 125-volt battery bank and its associated full capacity

" harger(s)

>i shall be demonstrated OPERABLE:

a. At least once per 7 days by ver1fying 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 and the battery charger(s) output voltage is ) 129 volts, and I fog At least once per 92 days and within 7 days after a battery discharge with battery tertiinal voltage below 105 volts (108.6 volts for spare battery 0-52), or battery overcharge with battery terminal voltage above 143 volts, by verifying that:

~'-~>o u 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 is less than 150 x 10-e oha, and

~ s u 3) The average electrolyte temperature of every sixth cell is above tJ 60oF 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, and coated with anticorrosion material,

3) The resistance of each cell-to-cell and terminal connection is less than or equal to 150 x 10-e oha, and "Can be extended to 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> if the chargers opposite unit is in NODE 5 or 6 and is capable of being powered each from of the remaining required battery its associated diesel generator(s).

- ~ENPgENT NOS.138 133 TURKEY POINT UNITS 3 8L 4 3/4 8-14 ANO