Text

Amends 137 & 123 to Licenses DPR-77 & DPR-79,respectively, Modifying Tech Spec Section 3/4.8, Electrical Power Sys to Allow Cleaning of Emergency Diesel Generator Fuel Oil Storage Tanks
	ML20042G035
Person / Time
Site:	Sequoyah
Issue date:	04/27/1990
From:	Black S; Office of Nuclear Reactor Regulation
To:	;
Shared Package
ML20042G036	List: ML20042G035; ML20042G037;
References
	NUDOCS 9005110017
	Download: ML20042G035 (23)
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i TENNESSEE VALLEY AUTHORITY DOCKET NO. 50-327 SE0VOYAH NUCLEAR PLANT, UNIT 1 AMENDMENT TO FACILITY OPERATING LICENSE l

Amendment No.137 l

License No. DPR-77 l

1.

The Nuclear Regulatory Commission (the Comission) has found that:

A.

The application for amendment by Tennessee Valley Authority (the licensee) dated April 5,1990, complies with the standards and requirements of the Atomic Energy Act of 1954, as amended (the Act),

and the Commission's rules and regulations set forth in 10 CFR l-Chapter I; B.

The facility will operate in conformity with the application, the provisions of the Act, and the rules and regulations of the Commission; C.

There is reasonable assurance (1) that the activities authorized by this amendment can be conducted without endangering the health and L

safety of the public, and (ii) that such activities will be conducted l

in compliance with the Commission's regulations; D.

The issuance of this amendment will not be inimical-to the common defense and security or to the health and safety of the public, and l-l E.

The issuance of this ar,inument is in accordance with 10 CFR Part 51 of the Commission's regulaticrs and all applicable requirements have been satisfied.

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2 2.

Accordingly, the, license is amended by changes to the Technical Specifications as indicated in the attachment to this license amendment and paragraph 2.C.(2) of Facility Operating License No. DPR.77 is hereby amended to read as follows:

(2) Technical Specifications The Technical Specifications contained in Appendices A and B, as revised through Amendment No.137, are hereby incorporated in the license. The licensee shall operate the facility in accordance with the Technical Specifications.

3.

This license amendment is effective as of its date of issuance.

FOR THE NUCLEAR REGULATORY COMMISSION h Suzanne Black, Assista Director N

for Projects TVA Projects Division Office of Nuclear Reactor Regulation

Attachment:

Changes to the Technical Specifications Date of Issuance: April 27. 1990 l

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ATTACHMENT TO LICENSE AMENDMENT NO. 137 FACILITY OPERATING LICENSE NO. DPR-77 DOCKET NO. 50-327 Revise the Appendix A Technical Specifications by removing the pages identified belaw and inserting the enclosed pages.

The revised pages are identified by the captioned amendment number and contain marginal lines indicating the ar.ea of change.

REMOVE INSERT 3/4 B-1 3/4 8-1 3/4 8-2 3/4 8-2 3/4 8-3 3/4 8-3 3/4 8-4 3/4 8-4 3/4 8-5 3/4 8-5 3/4 8-6 3/4 8-6 B 3/4 8-1 B 3/4 8-1 B 3/4 8-2 B 3/4 8-2 B 3/4 8-3 l

i 3/4.8 ELECTRICAL POWER SYSTEMS 3/4.8.1 A.C. SOURCES OPERATING LIMITING CONDITION FOR OPERATION 3.8.1.1 As a minimum, the following A.C. electrical power sources shall be OPERABLE:

a.

Two physically independent circuits between the offsite transmission network and the onsite Class 1E distribution system, and b.

Four separate and independent diesel generator sets each with:

1.

Two diesels driving a common generator 2.

Two engine-mounted fuel tanks containing a minimum volume of 250 gallons of fuel, per tank 3.

A separate fuel storage system containing a minimum volume of 62,000 gallons of fuel, 4.

A separate fuel transfer pump, and 5.

A separate 125-volt D.C. distribution panel, 125-volt D.C.

battery bank and associated charger.

APPLICABILITY:

MODES 1, 2, 3 and 4.

ACTION:-

a.

With either an offsite circuit or diesel generator set (s) 1A-A and/or 2A-A or 1B-B and/or 2B-B of the above required A.C. electrical power sources inoperable, demonstrate the OPERABILITY of the remaining A.C.

sources by performing Surveillance Requirement 4.8.1.1.1.a within one hour and at least once per 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months thereafter, and Surveillance Requirement 4.8.1.1.2.a.4 within 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months ; restore at least two offsite circuits and four diesel generator sets to OPERABLE status within 72 hours8.333333e-4 days 0.02 hours 1.190476e-4 weeks 2.7396e-5 months

or be in at least HOT STANDBY within the next 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months and in COLD SHUTDOWN within the following 30 hours3.472222e-4 days 0.00833 hours 4.960317e-5 weeks 1.1415e-5 months .

The 72-hour action statement may be extended for an additional 72 hours8.333333e-4 days 0.02 hours 1.190476e-4 weeks 2.7396e-5 months for one train of diesel generators (either IA-A and 2A-A, or 1B-B and 2B-B) during the performance of Surveillance Requirement 4.8.1.1.2.f.1.

A temporary fuel suppiy must be connected to the diesel generator set that is having the associated fuel tanks cleaned.

SEQUOYAH - UNIT 1 3/4 8-1 Amendment No. 100,132,137

p ELECTRICAL POWER SYSTEMS ACTION (Continued) b.

With one offsite circuit and one diesel generator set of the above required A.C. electrical power sources inoperable, demonstrate the OPERABILITY of the remaining A.C. sources by performing Surveillance Requirements 4.8.1.1.1.8 within one hour and at least once per 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months thereafter, and Surveillance Requirement 4.8.1.1.2.a.4 within 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months ; restore at least one of the inoperable sources to OPERABLE status within 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months or be in at least HOT STANDBY within the next 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months and in COLD SHUTDOWN within the followir.g 30 hours3.472222e-4 days 0.00833 hours 4.960317e-5 weeks 1.1415e-5 months .

Restore at least two offsite circuits and four diesel S 'erator sets to OPERABLE status t

within 72 hours8.333333e-4 days 0.02 hours 1.190476e-4 weeks 2.7396e-5 months from the time of initial loss or be in at least HOT STANDBY within the next 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months and in COLD SHUTDOWN within the following 30 hours3.472222e-4 days 0.00833 hours 4.960317e-5 weeks 1.1415e-5 months .

c.

With two of the above required offsite A.C. circuits inoperable, demonstrate the OPERABILITY of 4 diesel generator sets by performing Surveillance Requirement 4.8.1.1.2.a.4 within 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months , unless the diesel generator sets are already operating; restore at least one of the inoperable offsite sources to OPERABLE status within 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months or be in at least HOT STANDBY within the next 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months .

With only one offsite source restored, restore at least two offsite circuits to OPERABLE status within 72 huurs from time of initial loss or be in at least HOT STANDBY within the next 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months and in COLD SHUTDOWN within the following 30 hours3.472222e-4 days 0.00833 hours 4.960317e-5 weeks 1.1415e-5 months .

d.

With either diesel generator sets 1A-A and/or 2A-A inoperable simultaneous with IB-B and/or 2B-B, demonstrate the OPERABILITY of two offsite A.C. circuits by performing Surveillance Requirement 4.8.1.1.1.a within one hour and at least once per 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months thereafter; restore at least 1) 1A-A and 2A-A or 2) IB-B and 28-B to OPEPABLE status-within 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months or be in at least HOT STANDBY within the next 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months and in COLD SHUTDOWN within the following 30 hours3.472222e-4 days 0.00833 hours 4.960317e-5 weeks 1.1415e-5 months .

Restore at least four diesel generator sets to OPERABLE status within 72 hours8.333333e-4 days 0.02 hours 1.190476e-4 weeks 2.7396e-5 months from time of initial loss or be in least HOT STANDBY within the next 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months and in COLD SHUTDOWN within the following 30 hours3.472222e-4 days 0.00833 hours 4.960317e-5 weeks 1.1415e-5 months , t

SURVEILLANCE REOUIREMENTS 4.8.1.1.1 Each of the above required independent circuits between the offsite transmission network and the onsite Class 1E distribution system shall be:

a.

Determined OPERABLE at least once per 7 days by verifying correct breaker alignments, indicated power availability, and b.

Demonstrated OPERABLE at least once per 18 months during shutdown by transferring (manually and automatically) unit power supply from the normal circuit to the alternate circuit.

SEQUOYAH - UNIT 1 3/4 8-2 Amendment No. 100,137

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ELECTRICAL-POWER SYSTEMS

-SURVEILLANCE REQUIREMENTS (Continued) 4 4.8.1.1.2 Each diesel generator set shall be demonstrated OPERABLE:

a.

In accordance with the frequency specified in Table 4.8-1 on a STAGGERED TEST BASIS by:

1.

Verifying the fuel level in the engine-mounted day tanks.

2.

Verifying the fuel level in the 7 day tank.

3.

Verifying the fuel _ transfer pump can be started and transfers fuel from the storage system to the engine mounted fuel tanks.

)

4.

Verifying the diesel starts from ambient condition and

'4 accelerates to at least 900 rpm in less than or equal to 10 seconds.

The generator voltage and frequency shall be 6900 1 690 volts and 60 1 1.2 Hz within 10 seconds after the l

start signal.

The diesel generator shall be started for this test by using one of the following signals with startup on each signal verified at least once per 124 days:

l a)

Manual, j

b)

Simulated loss of offsite power by itself.

c)

An ESF actuation test signal by itself.

5.

Verifying the generator is synchronized, loaded to greater than l

or equal to 4400 kw in less than or equal to 60 seconds, and j

operates for greater than or equal to 60 minutes, and q

6.

Verifying the diesel generator is aligned to provide standby power to the associated shutdown boards.

b.

At least once per 31 days and after each operation of the diesel where the period of operation was greater than or equal to 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months by checking for and removing accumulated water from the engine-mounted fuel tanks.

a c.

At least once per 92 days and from new fuel oil prior to addition j

4 to the 7-day tanks by verifying that a sample obtained in accordance with ASTM-D270-1975 has a water and stdirent content of less than or l

equal to.05 volume percent and a kineatic viscosity @ 100'F of l

greater than or equal to 1.8 but less than or equal to 5.8 centi-stokes when tested in accordance with ASTM-0975-77, and an impurity level of less than 2 mg. of insolubles per 100 ml. when tested in accordance with ASTM-D2274-70.

l

The diesel generator start (10 sec) and load (60 see) from standby conditions l

shall be performed at least once per 184 days in these surveillance tests.

All i

other diesel generator engine starts and loading for the purpose of this sur-veillance testing may be preceded by an engine idle start, followed by gradual acceleration to synchronous speed (900 rpm), synchronization, and gradual loading.

i SEQUOYAH - UNIT 1 3/4 8-3 Amendment No. 52,64,99,109.137

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ELECTRICAL POWER SYSTEMS SURVEILLANCE REQUIREMENTS (Continued) d.

At least once per 18 months during shutdown by:

1.

Subjecting the diesel to an inspection in accordance with procedures prepared in conjunction with its manufacturer's recommendations for this class of standby service, 2.

Verifying the generator capability to reject a load of greater than or equal to 600 kw while maintaining voltage within 1 10 percent of the initial pretest voltage and frequency at 60 + 1.2 Hz.

At no time shall the cransient voltage exceed 8276V.

3.

Verifying the generator capability to reject a load of 4400 kw without tripping.

The generator voltage shall not exceed 114 percent of the initial pretest voltage or 8276V, whichever i> less during and following the load rejection.

4.

Simulating _a loss of offsite power by itself, and:

a)

Verifying de-energization of the shutdown boards and load shedding from the shutdown boards, b)

Verifying the diesel starts on the auto-start signal, j

energizes the shutdown boards with permanently connected loads within 10 seconds, energizes the auto-connected shutdown loads through the load sequencers 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 shutdown boards shall be maintained at 6900 1 690 volts and 60 1 1.2 Hz during this test.

5.

Verifying that on a ESF. 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 generator voltage and frequency shall be 6900 t 690 volts and 60 1 1.2 Hz within 10 seconds after the auto-start signal; the steady state generator voltage and fre-quency shall be maintained within these limits during this test.

6.

Simulating a loss of offsite power in conjunction with an ESF actuation test signal, and a)

Verifying de-energization of the shutdown boards and load shedding from the shutdown boards, b)

Verifying the diesel starts on the auto-start signal, energizes the shutdown boards with permanently connected loads within 10 seconds, energizes the auto-connected emergency (accident) loads through the load sequencers and operates for greater than or equal to 5 minutes while its generator is loaded with the emergency loads.

After energization, the steady state voltage and frequency of the emergency busses shall be maintained at 69001690 volts and 60 1 1.2 Hz during this test.

SEQUOYAH - UNIT 1 3/4 8-4 Amendment No. 49, 64, 114, 137 i

4

ELECTRICAL POWER SYSTEMS SURVEILLANCE REQUIREMENTS (Continued) c)

Verifying that all automatic diesel generator trips, except engine overspeed and generator differential, are automatically bypassed upon loss of voltage on the shutdown board and/or safety injection actuation signal.

7.

Verifying the diesel generator operates for at least 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months .

During the first 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months of this test, the dietel generator shall be loaded to greater than or equal to 4840 kw and during the remaining 22 hours2.546296e-4 days 0.00611 hours 3.637566e-5 weeks 8.371e-6 months of this test, the diesel generator shall be loaded to greater than or equal to 4400 kw.

The generator voltage and frequency shall be 6900 1 690 volts and 60 1 1.2 HZ within 10 seconds after the start signal; the steady state generator voltage and frequency shall be maintained i

within these limits during this test.

Within 5 minutes after completing this 24 hour2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months test, perform Specification 4.8.1.1.2.d.4.b.

8.

Verifying that the auto-connected loads to each diesel generator do not exceed the continuous rating of 4400 kW.

9.

Verifying the diesel generator's capability to:

a)

Synchronize with the offsite power source while the genera-tor is loaded with its emergency loads upon a simulated restoration of offsite power.

b)

Transfer its loads to the offsite power source, and c)

Be restored to its shutdown status.

10.

Verifying that the automatic load sequence timers are OPERABLE with the setpoint for each sequence timer within + 5 percent of its design setpoint.

E 11.

Verifying that the following diesel generator lockout features prevent diesel generator starting only when required:

a)

Engine overspeed b) 86 GA lockout relay e.

At least once per 10 years or after any modifications which could affect diesel generator interdependence by starting the diesel generators simultaneously, during shutdown, and verifying that the diesel generators accelerate to at least 900 rpm in less than or equal to 10 seconds.

SEQUOYAH - UNIT 1 3/4 8-5 Amendment No. 52,64,109,114,137

ELECTRICAL POWER SYSTEMS SURVEILLANCE REQUIREMENTS (Continued) f.

At least once per 10 years

by:

1.

Draining each fuel oil storage tank, removing the accumulated sediment and cleaning the tank using a sodium hypoclorite solution, and 2.

Performing a pressure test of those portions of the diesel fuel oil system design to Section III, subsection ND of the ASME Code at a test pressure equal to 110 percent of the system design pressure.

4.8.1.1.3 The 125-volt D.C. distribution panel, 125-volt D.C. battery bank and associated charger for each diesel generator shall be demonstrated OPERABLE:

a.

At least once per 7 days by verifying:

1.

That the parameters in Table 4.8-la meet the Category A limits.

2.

That the total battery terminal voltage is greater than or equal to 124-volts on float charge, b.

At least once per 92 days by:

1.

Verifying that the parameters in Table 4.8-la meet the Category B limits, 2.

Verifying there is no visible corrosion at either terminals or connectors, or the cell to terminal connection resistance of these items is less than 150 x 10 6 ohms, and 3.

Verifying that the average electrolyte temperature of 6 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.

2.

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

3.

The resistance of each cell to terminal connection is less than or equal to 150 x 10 6 ohms.

4.8.1,1.4 Reports - All diesel generator failures, valid or non-valid, shall~

be reported to the Commission pursuant to Specification 6.9.2.2.

These requirements-are waived for the initial surveillance.

SEQUOYAH - UNIT 1 3/4 8-6 Amendment No. 52,137

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$3/4.8 ELECTRICAL POWER SYSTEMS BASES 3/4.8.1 and 3/4.8.2 A'.C.

SOURCES AND ONSITE POWER DISTRIBUTION SYSTEMS i

The OPERABILITY of the A.C. and D.C power sources and associated distri-bution 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 conditions within the facility.

The minimum specified independent and redundant A.C. and 0.C.

power sources and distribution systems satisfy the requirements of General Design Criteria 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 commen-surate with the level'of degradation.

The OPERABILITY of the power sources are consistent with the initial condition assumptions of the accident analyses and are based upon maintaining at least one redundant set of onsite A.C. and 4

0.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.

Additional ACTION requirements are specified for performance of the chemical cleaning required by krveillance Requirement 4.8.1.1.2.f.1.

The motor-driven fuel pumps for the diesci penerator set with the tanks being cleaned will be temporarily connected to the underground storage tanks for the other diesel generator set with the same train designation.

An additional fuel-oil inventory of approximately 68,000 gallons will be available in one of the yard storage tanks prior to the start of the chemical cleaning of any underground storage tank.

Within practical limits, the chemical cleaning of an underground storage tank will be performed during a refueling or other scheduled outage for the associated unit.

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 status.

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, and 1.108 " Periodic Testing of Olesel 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 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."

~SEQUOYAH - UNIT 1 B 3/4 8-1 Amendment No. 12, 137

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

Verifying average electrolyte temperature above the minimum for which the battery was sized, total battery terminal voltage onfloat 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.

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.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 i

than 2,13 volts and not more than.020 below the manufacturer's full charge specific gravity with an average specific gravity of all the connected cells not more than.010 below the manufacture'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.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.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.

3/4.8.3 ELECTRICAL EQUIPMENT PROTECTIVE DEVICES Containment electrical penetrations and penetration conductors are protected by either de-energizing circuits not required during reactor operation or by demonstrating the OPERABILITY of primary and backup overcurrent protection circuit oreakers during periodic surveillance.

The surveillance requirements applicable to lower voltage circuit breakers and fuses provides assurance of breaker and fuse reliability by testing at least one representative sample of each manufacturers brand of circuit breakers and/or fuse.

Each manufacturer's molded case and metal case circuit breakers and/or fuses are grouped into representative samples which are then tested on a rotating basis to ensure that all breakers and/or fuses are tested.

If a wide variety exists within any manufacturer's brand of circuit breakers and/or fuses, it is necessary to divide that manufacturer's breakers and/or fuses into groups and treat each group as a separate type of breaker of fuses for surveillance purposes.

SEQUOYAH - UNIT 1 B 3/4 8-2 Amendment No. 12,137

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' ' ELECTRICAL POWER SYSTEMS BASES f

i-ELECTRICAL EQUIPMENT PROTECTIVE DEVICES (Continued)

The OPERABILITY of the motor operated valves thermal overload protection ensures that the thermal overload protection devices will not prevent safety related valves from performing their function.

The Surveillance Requirements for demonstrating the OPERABILITY of these devices are in accordance with Regulatory Guide 1.106 " Thermal Overload Protection for Electric Motors on Motor Operated Valves", Revision 1, March 1977.

Circuit breakers actuated by fault currents are used as isolation devices in this plant.

The OPERABILITY of these circuit breakers ensures that the 1E busses will be protected in the event of faults in nonqualified loads powered by the busses.

SEQUOYAH - UNIT 1 B 3/4 8-3 Amendment No.

33,137

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NUCLE AR REGULATORY COMMISSION

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TENNESSEE VALLEY AUTHORITY DOCKET NO. 50-328 SEQUOYAH NUCLEAR PLANT, UNIT 2 AMENDMENT TO FACILITY OPERATING LICENSE o

1 Amendment No.123 License No. DPR-79 1.

The Nuclear Regulatory Commission (the Commission) has found that:

A.

The application for amendment by Tennessee Valley Authority (the licensee) dated April 5,1990, complies with the standards and 2

requirements of the Atomic Energy Act of 1954, as amended (the Act),

and the Commission's rules and regulations set forth in 10 CFR Chapter I; B.

The facility will operne in conformity with the application, the provisions of the Act, and the rules and regu'lations of the Commission; C.

There is reasonable assurance (1) that the activities authorized by this amendment can be conducted without endangering the health and safety of the public, and (ii) that such activities will be conducted in compliance with the Commission's regulations; D.

The issuance of this amendment will not be inimical to the common defense and security or to the health and safety of the public; and E.

The issuance of this amendment is in accordance with 10 CFR Part 51 of the Commission's regulations and all applicable requirements have been satisfied.

^

2.

Accordingly, the license is amended by changes to the Technical Specifications as indicated in the attachment to this license amendment and paragraph 2.C.(2) of Facility Operating License No. OPR-79 is hereby amended to read as follows:

(2) Technical Specifications The Technical Specifications contained in Appendices A and B. as revised through Amendment No.123. are hereby incorporated in the license. The licensee shall operate the facility in accordance with the Technical Specifications.

3.

This license amenoment is effective as of its date of issuance.

I FOR THE NUCLEAR REGULATORY COMMISSION 4

uzanne B1 ssistagt Director for Projects TVA Projects Division Office of Nuclear Peactor Regulation

Attachment:

Changes to the Technical Specifications Date of issuance: April 27, 1990

1 o

ATTACHMENT TO LICENSE AMENDMENT NO. 123 FACILITY OPERATING LICENSE NO. DPR-79 DOCKET NO. 50-328 Revise the Appendix A Technical Specifications by removing the pages identified below and inserting the enclosed pages.

The revised pages are identified by the captioned amendment number and contain marginal lines indicating the area of change.

Overleaf pages* are provided to maintain document completeness.-

REMOVE INSERT 3/4 8 1 3/4 8-1 3/4 0-2 3/4 8-2 3/4 8-3 3/4 8-3 3/4 8-4 3/4 8-4 3/4 8-5 3/4 8-5 3/4 8-6 3/4 8-6*

B 3/4 8-1 B 3/4 8-1 B 3/4 8-2 B 3/4 8-2 l

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3/4.8 ELECTRICAL POWER SYSTEMS 3/4.8.1 A.C. SOURCES OPERATING LIMITING CONDITION FOR OPERATION 3.8.1.1 As a minimum, the following A.C. electrical power sources shall be OPERABLE:

a, Two physically independent circuits between the offsite transmission network and the onsite Class 1E distribution system, and b.

Four separate and independent diesel generator sett, each with:

1,.

Twc diesels driving a common generator 2.

Two engine-mounted fuel tanks containing a minimum volume of 250 gallons of fuel, per tank 3.

A separate fuel storage system containing a minimum volume of 62,000 gallons of fuel, 4.

A separate fuel transfer pump, and 5.

A separate 125-volt D.C, distribution panel, 125-volt D.C.

battery bank and associated charger.

APPLICABILITY:

MODES 1, 2, 3 and 4.

ACTION:

a.

With either an offsite circuit or diesel generator set (s) 1A-A and/or 2A-A or 18-B and/or 2B-B of the above required A.C. electrical power sources inoperable, demonstrate the OPERABIllTY of the remaining A.C. sources by performing Surveillance Requirement 4.8.1.1.1.a within one hour and at least once per 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months thereafter, and Surveillance Requirement 4.8.1.1.2.a.4 within 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months ; restore at least two offsite circuits and four diesel generator sets to OPERABLE status within

-72 hours

or be in at least HOT STANDBY within the next 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months and in l

COLD SHUTDOWN within the following 30 hours3.472222e-4 days 0.00833 hours 4.960317e-5 weeks 1.1415e-5 months .

The 72-hour action statement may be extended for an additional 72 hours8.333333e-4 days 0.02 hours 1.190476e-4 weeks 2.7396e-5 months for one train of diesel generators (either 1A-A and 2A-A, or IB-B and 2B-B) during the performance of Surveillance Requirement 4.8.1.1.2.f.1. -A temporary fuel supply must be connected to the diesel generator set that is having the associated fuel tanks cleaned.

SEQUOYAH - UNIT 2 3/4 8-1 Amendment No. 89,119,123 l

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' ELECTRICAL POWER SYSTEMS ACTION (Continued) l b.

With one offsite circuit and one diesel generator set of the above required A.C. electrical power sources inoperable, demonstrate the OPERABILITY of the remaining A.C. sources by performing Surveillance Requirements 4.8.1.1.1.a within one hour and at least once per 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months thereafter, and Surveillance Requirement 4.8.1.1.2.a.4 within 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months ; restore at least one of the inoperable sources to OPERABLE status within 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months or be in at least HOT STANDBY within the next 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months and in COLD SHUTDOWN within the following 30 hours3.472222e-4 days 0.00833 hours 4.960317e-5 weeks 1.1415e-5 months .

Restore at least two offsite circuits and four diesel generator sets to OPERABLE status within 72 hours8.333333e-4 days 0.02 hours 1.190476e-4 weeks 2.7396e-5 months from the time of initial loss or be in at least HOT STANDBY within the next 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months and in COLD SHUTDOWN within the following 30 hours3.472222e-4 days 0.00833 hours 4.960317e-5 weeks 1.1415e-5 months , c.

With two of the above required offsite A.C. circuits inoperable, demonstrate the OPERABILITY of 4 diesel generator sets by performing Surveillance Requirement 4.8.1.1.2.a.4 within 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months , unless the diesel generator sets are already operating; restore at least one of the inoperable offsite sources to OPERABLE status within 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months or be in at least HOT STANDBY within the next 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months .

With only one offsite source restored, restore at least two offsite circuits to OPERABLE status within 72 hours8.333333e-4 days 0.02 hours 1.190476e-4 weeks 2.7396e-5 months from time of initial loss or be in at least HOT STANDBY within the next 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months and in COLD SHUTDOWN within the following 30 hours3.472222e-4 days 0.00833 hours 4.960317e-5 weeks 1.1415e-5 months .

d.

With either diesel generator sets 1A-A and/or 2 A-A inoperable simultaneous with IB-B and/or 28-B, demonstrate the OPERABILITY of two offsite A.C. circuits by performing Surveillance Requirement 4.8.1.1.1.a within one hour and at least once per 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months thereafter; restore at least 1) 1A-A and 2A-A or 2) 1B-B and 28-B to OPERABLE status within 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months or be in at least HOT STANDBY within the next 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months and in COLD SHUTDOWN within the following 30 hours3.472222e-4 days 0.00833 hours 4.960317e-5 weeks 1.1415e-5 months .

Restore at least four diesel generator sets to OPERABLE status within 72 hours8.333333e-4 days 0.02 hours 1.190476e-4 weeks 2.7396e-5 months from time of initial loss or be in least HOT STANDBY within the next 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months and in COLD SHUTDOWN within the following 30 hours3.472222e-4 days 0.00833 hours 4.960317e-5 weeks 1.1415e-5 months .

SURVEILLANCE REQUIREMENTS 4.8.1.1.1 Each of the above required independent circuits between the offsite transmission network and the onsite Class 1E distribution system shall be:

a.

Determined OPERABLE at least once per 7 days by verifying correct breaker alignments, indicated power availability, and b.

Demonstrated OPERABLE at least once per 18 months during shutdown by transferring (manually and automatically) unit power supply from the normal circuit to the alternate circuit.

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SEQUOYAH - UNIT 2 3/4 8-2 Amendment No. 89,123 l

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ELECTRICAL POWER SYSTEMS SURVEILLANCE REQUIREMENTS (Continued) 4.8.1.1.2 Each diesel generator set shall be demonstrated OPERABLE:

a.

In accordance with the frequency specified in Table 4.8-1 on a STAGGERED TEST BASIS by:

1.

Verifying the fuel level in the engine-mounted day tanks.

2.

Verifying the fuel level in the 7 day tank.

3.

Verifying the fuel transfer pump starts and transfers fue,I from the storage system to the engine mounted fuel tanks.

4.

Verifying the diesel starts from ambient condition and accelerates to at least 900 rpm in less than or equal to 10 seconds.

The generator voltage and frequency shall be 6900 1 690 volts and 60 1 1.2 Hz within 10 seconds after the start signal.

The diesel generator shall be started for this test by using one of the following signals with startup on each signal verified at least once per 124 days:

a)

Manual.

b)

Simulated loss of offsite power by itself.

c)

An ESF actuation test signal by itself.

5.

" Verifying the generator is synchronized, loaded to greater than or equal to 4400 kw in less than or equal to 60 seconds, and operates for greater than or equal to 60 minutes, and 6.

Verifying the diesel generator is aligned to provide standby power to the associated shutdown boards, b,

At least once per ?1 days and after each operation of the diesel where the period of operation was greater than or equal to 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months by checking for and removing accumulated water from the engine-mounted fuel tanks.

c.

At least once per 92 days and from new fuel oil prior to addition to the 7-day tanks by verifying that a sample obtained in accordance with ASTM-D270-1975 has a water and sediment content of less than or equal to.05 volume percent and a kinematic viscosity 0100 F of greater than or equal to 1.8 but less than or equal to 5.8 centi-stokes when tested in accordance with ASTM-0975-77, and an impurity level of less than 2 mg. of insolubles per 100 ml. when tested in accordance with ASTM-02274-70.

The diesel generator start (10 see) and load (60 see) from standby conditions shall be performed at least once per 184 days in these surveillance tests.

All other diesel generator engine starts and loading for the purpose of this sur-veillance testing may be preceded by an engine idle start, followed by gradual acceleration O synchronous speed (900 rpm), synchronization, and gradual loading.

SEQUOYAH - UNIT 2 3/4 8-3 Amendment No. 44,56,88,99,123 t

ELECTRICAL POWER SYSTEMS SURVEILLANCE REQUIREMENTS (Continued) d.

At least once per 18 months during shutdown by:

1.

Subjecting the diesel to an inspection in accordance with procedures prepared in conjunction with its manufacturer's recommendatio'is for this class of standby service, 2.

Verifying the generator capability to reject a load of greater than or equal to 600 kw while maintaining voltage at within i 10 percent of the initial pretest voltage and frequency at 60 + 1.2 Hz.

At no time shall the transient voltage exceed 8275V.

3.

Verifying the generator capability to reject a load of 4400 kw without tripping.

The generator voltage shall not exceed 114 percent of the initial pretest voltage or 8276V, whichever is less during and following the load rejection.

4 Simulating a loss of of fsite power by itself, and:

a)

Verifying de-energization of the shutdown boards and load shedding from the shutdown boards.

b)

Verifying the diesel starts on the auto-start signal, energizes the shutdown boards with permancntly connected loads within 10 seconds, energizes the auto-connected shutdown loads through the load sequencers 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 shutdown boards shall be maintained at 6900 1 690 volts and 60 1 1.2 Hz during this test.

5.

Verifying that on a ESF 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 generator voltage and frequency shall be 6900 1 690 volts and 60 1 1.2 Hz within 10 seconds after the auto-start signal; the steady state generator voltage and frequency shall be maintained within these limits during this test.

6.

Simulating a loss of offsite power in conjunction with an ESF actuation test signal, and a)

Verifying de-energization of the shutdown boards and load shedding from the shutdown boards, b)

Verifying the diesel starts on the auto-start signal, energizes the shutdown boards with permanently connected loads within 10 seconds, energizes the auto-connected emergency (accident) loads through the load sequencers and operates for greater than or equal to 5 minutes while its generator is loaded with the emergency loads.

After energization, the steady state voltage and frequency of the emergency busses shall be maintained at 6900 1 690 volts and 60 1 1.2 Hz during this test.

SEQUOYAH - UNIT 2 3/4 8-4 Amendment No. 41,123 f

e ELECTRICAL p0WER SYSTEMS t

L SURVEILLANCE REQUIREMENTS (Continued) c)

Verifying that all automatic diesel generator trips, except engine overspeed and generator differential, are automatically bypassed upon loss of voltage on the shutdown board and/or safety injection actuation signal.

7.

Verifying the diesel generator operates for at least 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months .

During the first 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months of this test, the diesel generator shall be loaded to greater than or equal to 4840 kw and during the remaining 22 hours2.546296e-4 days 0.00611 hours 3.637566e-5 weeks 8.371e-6 months of this test, the diesel generator shall be loaded to greater than or equal to 4400 kw.

The generator voltage and frequency shall be 6900 t 690 volts and 60 t 1.2 Hz within 10 seconds after the start signal; the steady state generator voltage and frequency shall be maintained within these limits during this test.

Within 5 minutes after completing this 24 hour2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months test, perform Specification 4.8.1.1.2.d.4 b 8.

Verifying that the auto-connected loads to each diesel generator do not exceed the continuous rating of 4400 kw.

9.

Verifying the diesel generator's capability to:

a)

Synchronize with the offsite power source while the generator is loaded with its emergency loads upon a simulated restoration of offsite power.

b).

Transfer its loads to the offsite power source, and c)

Be restored to its shutdown status.

10.

Verifying that the automatic load sequence timers are OPERABLE with the setpoint for each sequence timer within + 5 percent of its design setpoint.

11.

Verifying that the following diesel generator lockout features prevent diesel generator starting only when required:

a)

Engine overspeed b) 86 GA lockout relay e.

At least once per 10 years or after any modifications which could affect diesel generator interdependence by starting the diesel generators simultaneously, during shutdown, and verifying that the diesel generators accelerate to at least 900 rpm in less than or equal to 10 seconds.

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SEQUOYAH - UNIT 2 3/4 8-5 Amendment No. 41, 56,123

t-C ELECTRICAL POWER SYSTEMS SURVEILLANCE REQUIREMENTS (Continued) f.

At least once per 10 years

by:

1.

Draining each fuel oil storage tank, removing the accumulated sediment and cleaning the tank using a sodium hypoclorite solution, and 2.

Performing a pressure test of those portions of the diesel fuel oil system designed to Section III, subsection ND of the ASME Code at a test pressure equal to 110 percent of the system design pressure.

4.8.1.1.3 The 125-volt D.C. distribution panel, 125-volt D.C. battery bank and associated charger for each diesel generator shall be demonstrated OPERABLE:

a.

At least once per 7 days by verifying:

1.

That the parameters in Table 4.8-la meet the Category A limits.

2.

That the total battery terminal voltage is greater than or equal to 124 volts on float charge, b.

At least once per 92 days by:

1.

Verifying that the parameters in Table 4.8-la meet the Category B

limits, 2.

Verifying there is no visible corrosion at either terminals or connectors, or the cell to terminal connection resistance of these items is less than 150 x 10 6 ohms, and 3.

Verifying that the average electrolyte temperature of 6 connected cells is above 60 F.

i 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.

2.

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

3.

The resistance of each cell to terminal connection is less than or equal to 150 x 10 S ohms.

l-

These requirements are waived for the initial surveillance.

SEQUOYAH - UNIT 2 3/4 8-6 Amendment No. 8

3/4.8 ELECTRICAL POWER SYSTEMS BASES 3/4.8.1 AND 3/4.8.2 A.C. SOURCES AND ON5ITE POWER DISTRIBUTION 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 req ' red for 1) the safe shutdown of the facility and 2) the mitigation and control of accident condi-tions within the facility.

The minimum specified independent and redundant A.C and D.C. power sources and distribution systems satisfy the requirements of General Design Criterion 17 of Appendix "A" to 10 CFR 50.

Th

' ION requirements specified for the levels of degradation of the power sv.ses provide re

'-4 tion upon continued facility operation commensurate with the level of degri#>tu.

The OPERABILITY of the power sources are consistent with the inii'9' condition assumptions of the safety analyses and are based upon maintainitig at least one redundant set of onsite A.C. and 0.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.v.

source.

Additional ACTION reouirements are specified for performance of the chemical cleaning required by Surveillance Requirement 4.8.1.1.2.f.1.

The motor-driven fuel pumps for the diesel generator set with the tanks being cleaned will be temporarily connected to the underground storage tanks for the cther diesel generator set with the same train designation.

An additional fuel-oil inventory of approximately 68,000 gallons will be available in one of the yard storage tanks prior to the start of the chemical cleaning of any underground storage tank.

Within practical limits, the chemical cleaning of an underground storage tank will be performed during a refueling or other scheduled outage for the associated unit.

The OPERABILITY of the minimum specified A.C. and 0.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 status.

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, i

August 1977, and 1.137 " Fuel-Oil Systems for Standby Diesel Generators,"

Revision 1, Octcber 1979.

The Surveillance Requirement for demonstrating the OPERABILITY of the Station batteries are 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 Mcintenance, Testing and Replacement of Large Lead Storage Batteries for Generating Stations and Substations."

SEQUOYAH - UNIT 2 8 3/4 8-1 Amendment No.123 u..

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+ # ' ELECTRICAL POWER SYSTEMS BASES' l

.A.C.

SOURCES AND ONSITE POWER DISTRIBUTION SYSTEMS (Continued).

l

~ Verifying 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 j

ensures the effectiveness of the charging system, the ability to handle high j

discharge rates and compares-the battery capacity at that time with the rated capacity.

~

Table 4.8-2 specifies the normal limits for each designated pilot cell 4

and each connected cell for electrolyte level, float voltage and specific

~j gravity.

The limits for the designated pilot cells float voltage and specific 1

. gravity, greater than 2.13 volts and.015 below the manuf acturer's full charge l

specific gravity or a battery charger current that had stabilized at a low-i value, is characteristic of a charged cell with adequate capacity.

The normal limits for each connected cell for float voltage and specific gravity, greater j

than 2.13 volts and not more tha.020 below the manufacturer's full charge specific gravity with an average specific gravity of all the connected cells

.not more than.010 below the manufacturer's full charge specific gravity, ensures the OPERABILITY and capability of the battery.

i Operation with a battery cell's parameter outside the normal limit but within t% 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 ensares 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 j

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.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, ens'ures the battery's capability to perform its. design function.

3/4.8.3 ELECTRICAL EQUIPMENT PROTECTIVE DEVICES Containment electrical penetrations and penetration conductors are protected

-by either deenergizing circuits not required during reactor operation or by demonstrating the OPERABILITY of primary and backup overcurrent protection circuit breakers during periodic surveillance.

'The surveillance requirements applicable to lower voltage circuit breakers

.and fuses provides assurance of breaker and fuse reliability by testing at least one representative sample of each manufacturers brand of circuit breaker f"

and/or fuse.

Each manufacturer's molded case and metal case circuit breakers and/or fuses are grouped into representative samples which are then tested on a rotating basis to ensure that all breakers and/or fuses are tested.

If a wide' variety exists within any manufacturer's brand of circuit breakers and/or

, fuses, it is necessary to divide that manufacturer's breakers and/or fuses into groups and treat each group as a separate type of breaker or fuses for surveillance purposes.

.SEQUOYAH - UNIT 2 B 3/4 8-2 Amendment No.123 5

ML20042G035

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