ML20058L798

Proposed TS Surveillance 4.8.1.1.2.d.2,increasing EDG Voltage Limit on Full Load Rejection

ML20058L798
Person / Time
Site:	Waterford
Issue date:	05/06/1993
From:	ENTERGY OPERATIONS, INC.
To:
Shared Package
ML20058L796	List: ML20058L793 ML20058L798
References
NUDOCS 9305120149
Download: ML20058L798 (6)

Text

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4 ELECTRICAL POWER SYSTEMS SURVEILLANCE REOUIREMENTS (Continued) l

3. Verify the other properties specified in Table 1 of ASTM-0975-1977 and Regulatory Guide 1.137, Revision 1, October 1979, l Position 2.a., when tested in accordance with ASTM-0975-1977; analysis shall be completed within 14 days after obtaining the sample but may be performed after the addition of new fuel oil. 1 Failure to meet this requirement shall not affect diesel genera-ter OPERABILITY; however, corrective action shall be initiated within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> to return the fuel oil supply to within accept-able limits.

c. At least once per 18 months during shutdown by:

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1. Verifying the generator capability to reject a load of greater than or equal to 498 kW (HPSI pump) while maintaining voltage i at 4160 + 420,-240 volts and frequency at 60 +4.5, -1.2 Hz.

2. Verifying the generator capability to reject a load of 4400 kW '

without tripping. The generator voltage shall not exceed -

4784 volts during and following the load rejection. -l

3. Simulating a loss-of-offsite power by itself, and:

af Verifying deenergization of the emergency busses and load shedding from the emergency busses. 1 b) Verifying the diesel starts on the auto-start signal, energizes the emergency busses with permanently con-nected loads within 10 seconds after the auto-start signal, energizes the auto-connected shutdown loads

-through the load sequencer and operates for greater than or equal to 5 minutes while its generator is loaded with the shutdown loads. After energization, the steady-state voltage and frequency of the emergency busses shall be maintained at 4160 + 420,-240 volts and 60 + 1.2, -0.3 Hz during this test.

4. Verifying that on an SIAS actuation test signal (without loss-of-offsite power) the diesel generator starts on the auto-start signal and operates on standby for greater than or equal to 5 minutes. The steady-state generator voltage and frequency shall be 4160 + 420,-240 volts and 60 i 1.2 Hz within 10 seconds after the auto-start signal; the generator voltage and frequency shall be maintained within these limits during this test.

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l WATERFORD - UNIT 3 3/4 8-5 AENDMENT N0. 4,23, 74

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

The Surveillance Recuirement 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."

Verifying average electrolyte temperature above the minimum for which the {

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 discnarge rates and compares the battery capacity at that time with the rated capacity.  ;

1 Table 4.8-2 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 l

value, is characteristic of a charged cell with adequate capacity. The normal l

limits for each connected cell for float voltage and specific gravity, greater I than 2.13 volts and not more than 0.020 below the manufacturer's full charge specific gravity with an average specific gravity of all the connected cells not more than 0.010 below the manufacturer's full charge specific gravity, ensures the OPERABILITY and capability of the battery.

Operation with a battery cell's parameter outside the normal limit but within the allowable value specified in Table 4.8-2 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 i 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, enstres 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 its design function.

WATERFORD - UNIT 3 B 3/4 8-2

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ELECTRICAL POWER SYSTEMS SURVEILLANCE REQUIRKKRWTS (Continued)

3. Verify the other properties specified in Table 1 of ASTM-D975-1977 and Regulatory Guide 1.137, Revision 1, October 1979, Position 2.a., when tested in accordance with ASTM-D975-1977; analysis shall be completed within 14 days after obtaining the sample but may be performed after the addition of new fuel oil.

Failure to meet this requirement shall not affect diesel genera-tor OPERABILITY; however, corrective action shall be initiated within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> to return the fuel oil supply to within accept-able limits.

d. At least once per 18 months during shutdown by:

1. Verifying the generator capability to reject a load of greater than or equal to 498 kW (HPSI pump) while maintaining voltage at 4160 + 420,-240 volts and frequency at 60 +4.5, -1.2 Hz.

2. Verifying the generator capability to reject a load of 4400 kw without tripping. The generator voltage shall not exceed 47S4 5023 volts during and following the load rejection. REPLACE

3. Simulating a loss-of-of f site power by itself, and:

a) Verifying deenergization of the emergency busses and load shedding from the emergency busses.

b) Verifying the diesel starts on the auto-start signal, energizes the smergency busses with permanently con-nected loads within 10 seconds after the auto-start signal, energizes the auto-connected shutdown loads through the load sequencer and operates for greater than or equal to 5 minutes while its generator is loaded with the shutdown loads. After energization, the steady-state voltage and frequency of the emergency busses shall be maintained at 4160 + 420 ,- 240 volts and 60 + 1.2, -0.3 Hz during this test.

4. Verifying that on an SIAS actuation test signal (without loss of-offsite power) the diesel generator starts on the auto-start signal and operates on standby for greater than or equal to 5 minutes. The steady-state generator voltage and frequency shall be 4160 + 420 , - 240 volts and 60 1.2 Hz within 10 seconds after the auto-start signal; the generator voltage and frequency shall be maintained within these limits during this test.

WATERFORD - UNIT 3 3/4 8-5 AMENDMENT 74

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

The diesel generator Surveillance testing performed once per 18 ADD months during shutdown is in accordance with Regulatory Guide 1.108, Regulatory Position C.2. The maximum voltage limit in Surveillance test 4.8.1.1.2.d.2 was increased to 5023 volts in response to NRC Information Notice 91-13: Inadequate Testing of Emergency Diesel Generators. A maximum voltage limit is provided to ensure that components electrically connected to the diesel gsnerator are not damaged as a result of the momentary voltage excursion exparienced during this test.

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."

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

Tab 39 4.8-2 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 i specific gravity or a battery charger current that had stabilized at a low l 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 gravity with an average specific gravity of all the connected cells not more than 0.010 below the manufacturer's full charge specific gravity, ensures the OPERABILITY and capability of the battery.

Operation with a battery cell's parameter outside the normal limit but within the allowable value specified in Table 4.8-2 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 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 i 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 its design function.

WATERFORD - UNIT 3 3/4 8-2