ML20215L968

Amends 71 & 52 to Licenses NPF-9 & NPF-17,respectively, Changing Tech Specs Re Diesel Generator Testing & Surveillance

ML20215L968
Person / Time
Site:	McGuire, Mcguire
Issue date:	05/06/1987
From:	Youngblood B Office of Nuclear Reactor Regulation
To:
Shared Package
ML20215L970	List: ML20215L968 ML20215L972
References
NUDOCS 8705130035
Download: ML20215L968 (14)

Text

.

g UNITED STATES

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g NUCLEAR REGULATORY COMMISSION 5

j WASHINGTON, D. C. 20555

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DUKE POWER COMPANY DOCKET NO. 50-369 McGUIRE NUCLEAR STATION, UNIT 1 AMENDMENT TO FACILITY OPERATING LICENSE Amendment No. 71 License No. NPF-9 1.

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

A.

The application for amendraent to the McGuire Nuclear Station.

Unit 1 (the facility) Facility Operating License No. NPF-9 filed by the Duke Power Company (the licensee) dated July 10, 1985, revised April 15, 1986 and supplemented October 30, and November 21, 1986, complies with the standards and requirements of the Atomic Energy Act of 1954, as amended (the Act) and the Comission's rules and regulations as set forth in 10 CFR Chapter I; B.

The facility will operate in conformity with the application, as amended, the provisions of the Act, and the rules and regulations of the Comission; 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 Comission's regulations set forth in 10 CFR Chapter I; D.

The issuance of this amendment will not be inimical to the comon 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 Comission's regulations and all applicable requirements have been satisfied.

8705130033 870506 PDR ADOCK 05000369 P

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o l 2.

Accordingly, the license is hereby amended by page changes to the Technical Specifications as indicated in the attachments to this license amendment, and Paragraph 2.C.(2) of Facility Operating License No. NPF-9 is hereby amended to read as follows:

(2)TechnicalSpecifications The Technical Specifications contained in Appendix A, as revised through Amendment No. 71, are hereby incorporated into the license.

The licensee shall operate the facility in accordance with the Technical Specifications and the Environmental Protection Plan.

3.

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

FOR THE NUCLEAR REGULATORY COMMISSION

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B.J. Youngblood, Director Project Directorate II-3 Division of Reactor Projects I/II i

Attachment:

Technical Specification Changes Date of Issuance: May 6, 1987

• SEE PREVIOUS CONCURRENCE L

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',h UNITED STATES NUCLEAR REGULATORY COMMISSION n

j WASHINGTON. D. C. 20655

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DUKE POWER COMPANY DOCKET NO. 50-370 McGUIRE NUCLEAR STATION, UNIT 2 i

AMENDMENT TO FACILITY OPERATING LICENSE Amendment No.52 License No. NPF-17 1.

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

A.

The application for amendment to the McGuire Nuclear Station, Unit 2 (the facility) Facility Operating License No. NPF-17 filed by the Duke Power Co any (the licensee) dated July 10, 1985, revised April 15, 1986 and supplemented October 30. and November 21, 1986, i

complies with the standards and requirements of the Atomic Energy Act of 1954, as amended (the Act) and the Comission's rules and regulations as set forth in 10 CFR Ch.npter I; B.

The facility will opterate in conformity with the application, as amended, the provisions of the Act, and the rules and regulations of the Comission; C.

There is reasonable assurance (i) that the activities authorized by this amendment can be conducted without endangering the health and 4

safety of the public, and (ii) that such activities will be conducted in compliance with the Comission's negulations set forth in 10 CFR Chapter I; 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 Comission's regulations and all applicable requirements have been satisfied.

i e 2.

Accordingly, the license is hereby amended by page changes to the Technical-Specifications as indicated in the attachments to this license amendment, and Paragraph 2.C.(2) of Facility Operating License No. NPF-17 is hereby amended to read as follows:

(2) Technical Specifications The Technical Specifications contained in Appendix A, as revised through Amendment No.52, are hereby incorporated into the license.

The licensee shall operate the facility in accordance with the Technical Specifications and the Environmental Protection Plan.

3.

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

FOR TliE NUCLEAR REGULATORY COMMISSION W\\

l B.J. Youngblood, Director Project Directorate II-3 Division of Reactor Projects I/II

Attachment:

Technical Specification Changes

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Date of Issuance:

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f ATTACHMENT TO LICENSE AMENDMENT NO. 71 3

FACILITY OPERATING LICENSE NO. NPF-9 DOCKET NO. 50-369 AND

,TO LICENSE AMENDMENT NO.52_

FACILITY OPERATING LICENSE NO. NPF-17 DOCKET NO. 50-370 Replace the following pages of the Appendix "A" Technical Specifications with the enclosed pages. The revised pages are identified by Amendment number and contain vertical lines indicating the areas of change.

Amended lf-Page t.

3/4 8-1 3/4 8-2a 3/4 8-2 3/4 8-3 3/4 8-4 l-l 3/4 8-5 B 3/4 8-1 B 3/4 8-2 3/4 8-8

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9 TABLE 4.8-1 DIESEL GENERATOR TEST SCHEDULE NUMBER OF FAILURES NUMBER OF FAILURES IN IN LAST 100 VALID LAST 20 VALIO TESTS

• TESTS

• TEST FREQUENCY

$1 14 Once per 31 days

> 2**

>5 Once per 7 days

• Criteria for determining number of failures and number of valid tests shall be in accordance with Regulatory Position C.2.e of Regulatory Guide 1.108, but determined on a per diesel generator basis.

For the purposes of determining the required test frequency, the previous test failure count may be reduced to zero if a. complete diesel overhaul to like new conditions is completed, provided that the overhaul including appro-priate post-maintenance operation and testing, is specifically approved by the manufacturer and if acceptable reliability has been demonstrated.

The reliability criterion shall be the successful completion of 14 consecutive tests in a single series.

Ten of these tests shall be in accordance with

{

Surveillance Requirement 4.8.1.1.2.a.4; four tests, in accordance with Surveillance Requirement 4.8.1.1.2.c.

If this criterion is not satisfied during the first series of tests, any alternate criterion to be used to transvalue the failure count to zero requires NRC approval.

• • The associated test frequency shall be maintained until seven consecutive failure free demands have been performed and the number of failures in the

)

last 20 valid demands has been reduced to one.

I i

McGUIRE - UNITS 1 and 2 3/4 8-8 Amendment No. 71 (Unit 1)

(

Amendment No. 52 (Unit 2)

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3/4.8 FLECTRICAL 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 scurces sh'all be OPERABLE:

Two physically independent circuits between the offsite transmission a.

network and the Onsite Essential Auxiliary Power System, and b.

Two separate and independent diesel generators, each with:

1)

A separate day tank containing a minimum volume of 120 gallons of fuel, 2)

A separate Fuel Storage System containing a minimum volume of 28,000 gallons of fuel, and 3)

A separate fuel transfer pump.

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

ACTION:

With an offsite circuit of the above required A.C. electrical power a.

sources inoperable, demonstrate the OPERABILITY of the remaining A.C.

sources by performing Surveillance Requirement 4.8.1.1.la. within 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; separately demon-l strate the operability of two diesel generators by performing Sur-veillance Requirements 4.8.1.1.2a.4 and 4.8.1.1.2a.5 within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> unless this surveillance was performed within the previous 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />, or unless the diesel is operating **, restore at least two offsite circuits and two diesel generators to OPERABLE status within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 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 followirg 30 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br />.

b.

With one offsite circuit and one diesel generator of the above required A.C. electrical power sources inoperable *, demonstrata the OPERABILITY of the remaining A.C. source by performing Surveillance Requirement 4.8.1.1.la. within 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; demonstrate the operability of the remaining diesel generator by performing Surveillance Requirements 4.8.1.1.2a.4 and 4.8.1.1.2a.5 within 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> unless this surveillance was performed-I within the previous 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />, or unless the diesel is operating **;

restore at least one of the inoperable sources to OPERABLE status within 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 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 />; with the diesel

• A diesel generator shall be considered to be inoperable from the time of failure until it satisfies the requirements of Surveillance Requirements 4.8.1.1.2a.4) and 4.8.1.1.2a.5).

• • This test is required to be completed regardless of when the inoperable diesel gen'erator is restored to OPERABLE status.

The provisions of Specification 3.0.2 are not applicable.

McGUIRE - UNITS 1 and 2 3/4 8-1 Amendment No. 71 (Unit 1)

Amendment No. 52 (Unit 2)

a ELECTRICAL POWER SYSTEMS LIMITING CONDITION FOR OPERATION ACTION: (Continued) generatorrestoredtoOPERABLEstatus,followactionstatement5; with the offsite circuit restored to OPERABLE status, follow action statement d.

c.

With one diesel generator inoperable in addition to ACTION b. or d.

above, verify that:

1.

All required systems, subsystems, trains, components, and devices that depend on the remaining OPERABLE diesel generator as a source of emergency power are also OPERABLE, and 2.

When in MODE 1, 2, or 3 with a steam pressure greater than 900 psig, the steam-driven auxiliary feedwater pump is OPERABLE.

If these conditions are not satisfied within 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> 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 />.

d.

With a diesel generator of the above required A.C. electrical power sources inoperable *, demonstrate the OPERABILITY of the A.C. offsite sources by performing Surveillance Requirement 4.8.1.1.la within 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; and unless the in-operability of the diesel was due to preplanned testing or maintenance, demonstrate the OPERABILITY of the remaining diesel generator by per-forming Surveillance Requirements 4.8.1.1.2a.4) and 4.8.1.1.2a.5) within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> or unless the diesel is operating **, restore diesel-generators to OPERABLE status within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 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 />.

e.

With two of the above required offsite A.C. circuits inoperable, separately demc strate the OPERABILITY of two diesel generators by performing Surssillance Requirements 4.8.1.1.2a.4) and 4.8.1.1.2a.5) within 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br />, unless the diesel generators are already operating; restore at least one of the inoperable offsite sources to OPERABLE

• status within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 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 />. With only one offsite source restored, follow action statement a.

f.

With two of the above required diesel generators inoperable *, demon-i strate the OPERABILITY of two offsite A.C. circuits by performing Surveillance Requirement 4.8.1.1.la. within 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 i

• A diesel generator shall be considered to be inoperable from the time of failure until it satisfies the requirements of Surveillance Requirements 4.8.1.1.2a.4) and 4.8.1.1.2a.5).

• • This test is required to be completed regardless of when the inoperable diesel generator is restored to OPERABLE status.

The provisions of Specification 3.0.2 are not applicable.

)

McGUIRE - UNITS 1 and 2 3/4 8-2 Amendment No. 71 (Unit 1)

Amendment No. 52 (Unit 2)

ELECTRICAL POWER SYSTEMS LIMITING CONDITION FOR OPERATION ACTION: (Continued) per 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> thereafter;. restore at least one of the inoperable diesel generators 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 />. With one diesel generator restored, follow action statement d.

SURVEILLANCE REQUIREMENTS 4.8.1.1.1 Each of the above required independent circuits between the offsite transmission network and the onsite Essential Auxiliary Power System shall be:

Determined OPERABLE at least once per 7 days by verifying correct a.

breaker alignments, indicated power availability, and b.

Demonstrated 0PERABLE at least once per 18 months during shutdown by transferring (manually and automatically) unit power supply from the normal circuit to the alternate circuit.

4.8.1.1.2 Each diesel generator 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 day tank, McGUIRE - UNITS 1 and 2 3/4 8-2a Amendment No.71 (Unit 1)

Amendment No.52 (Unit 2)

ELECTRICAL POWER SYSTEMS SURVEILLANCE REQUIREMENTS (Continued) 2)

Verifying the fuel level in the fuel storage tank, 3)

Verifying the fuel transfer pump starts and transfers 'f'uel'from the storage system to the day tank, 4)

Verifying the diesel starts from ambient condition and.

accelerates to at least 488 rpm in less than or equal to 11 seconds *.

The generator voltage and frequency shall be l

at least 4160 volts and 57 Hz within 11 seconds after the start signal.

The diesel generator shall be started for this test by using one of the following signals:

a)

Manual, or b)

Simulated less-of-offsite power by itself, or c)

Simulated loss-of offsite power in conjunction with an ESF Actuation test signal, or d)

An ESF Actuation test signal by itself.

5)

Verifying the generator is synchronized, loaded to greater than or equal to 3000 kW in less than or equal to 60 seconds, and to 4000 kW within 10 minutes and operates for at least 60 minutes, and 6)

Verifying the diesel generator is aligned to provide standby power to the associated emergency busses.

b.

By removing accumulated water:

1)

From the day tank at least once per 31 days and after each occasion when the diesel is operated for greater than I hour.

and 2)

Fror; the storage tank at least once per 31 days.

By sampling new fuel oil in accordance with ASTM D4057-81 prior to c.

addition to the storage tanks and:

1)

By verifying in accordance with the tests specified in ASTM D975-81 prior to addition to the storage tanks that the sample has:

a)

An API Gravity of within 0.3 degrees at 60 F or a specific gravity of within 0.0016 at 60/60 F, when compared to the supplier's certificate or an absolute specific gravity at 60/60 F of greater than or equal to 0.83 but less than or equal to 0.89 or an API gravity at 60 F of greater than or equal to 27 degrees but less than or equal to 39 degrees.

• The diesel generator start (11 sec) from ambient conditions shall be performed at least once per 184 days in these surveillance tests.

All other engine starts for the purpose of this surveillance testing may be preceded by an engine pre-lube period and/or other warmup procedures recommended by the manufacturer so that mechanical stress and wear on the diesel engine is minimized.

McGUIRE - UNITS 1 and 2' 3/4 8-3 Amendment No.71 (Unit 1)

Amendment No.52 (Unit 2)

ELECTRICAL POWER SYSTEMS

' SURVEILLANCE REQUIREMENTS (Continued) b)

A kinematic vicosity at 40*C of greater than or equal to 1.9 centistokes, but less than or equal to 4.1 ce'ntistokes (alternatively, Saybolt viscosity, SUS at 100 F of greater than or equal to 32.6, but less than or equal to 40.1), if gravity was not determined by comparison with the supplier's certification.

c)

A flash point equal to or greater than 125'F, and d)

A clear and bright appearance with proper color"when tested in accordance with ASTM 04176-82.

2)

By verifying within 31 days of obtaining the sample that the other properties specified in Table 1 of ASTM D975-81 are met when tested.in accordance with ASTM 0975-81 except that the analysis for sulfur may be performed in accordance with ASTM D1552-79 or ASTM D2622-82.

d.

At least once every 31 days by obtaining a sample of fuel oil from the storage tanks in accordance with ASTM D2276-78, and verifying that total particulate contamination is less than 10 mg/ liter when checked in accordance with ASTM D2276-78, Method A.

e.

At least once per 18 months, during shutdown, by:

1)

Subjecting the diesel to an inspe'c' tion 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 576 kW while maintaining voltage at 4160 1 420 volts and frequency at 60 1 1.2 Hz; 3)

Verifying the generator capability to reject a load of 4000 kW without tripping.

The generator voltage shall not exceed 4784 volts during and following the load rejection; 4)

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

a)

Verifying deenergization of the emergency busses and load shedding from the emergency busses, and b)

Verifying the diesel starts on the auto-start signal, energizes the emergency busses with permanently connected loads within 11 seconds, energizes the auto-connected blackout loads through the load sequencer and operates for greater than or equal to 5 minutes while its generator is loaded with the blackout loads.

After energization, the steady-state voltage and frequency of the emergency busses shall be maintained at 4160 1 420 volts and 60 1.2 Hz during this test.

McGUIRE - UNITS 1 and 2 3/4 8-4 Amendment No. 71 (Unit 1)

Amendment No. 52 (Unit 2)

ELECTRICAL POWER SYSTEMS SURVEILLANCE REQUIREMENTS (Continued) i 5)

Verifying that on an 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 at least 4160 volts and 57 Hz within 11 seconds after the auto-start signal; the steady-state generator voltage and frequency shall be maintained within 4160 i 420 volts and 60 i 1.2 Hz during this test; 6)

Simulating a loss-of-offsite power in conjunction with an ESF actuation test signal, 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 emergency busses with permanently connected loads within 11 seconds, energizes the auto connected l

emergency (accident) loads through the load sequencer 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 4160 +

420 volts and 60 + 1.2 Hz during this test; and -

c).

Verifying that all automatic diese' generator trips, except l

engine overspeed, lube oil pressure, and generator differ-(

ential are automatically bypassed upon loss of voltage on the emergency bus concurrent with a Safety Injection Actua-tion signal.

Additionally, all diesel generator breaker trips, except generator time overcurrent, are verified to be automatically bypassed upon concurrent loss of voltage on the emergency bus and a Safety Injection Actuation signal.

7)

Operating for one hour at 4000 kW to achieve temperature stabil-ity. Within 5 minutes, restart and perform Surveillance Requirement 4.8.1.1.2e.6)b).

8)

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

During the first 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> of this test, the diesel generator shall be loaded to greater than or equal to 4400 kW and during the remaining 22 hours2.546296e-4 days <br />0.00611 hours <br />3.637566e-5 weeks <br />8.371e-6 months <br /> of this test, the diesel generator shall be loaded to greater than or equal to 4000 kW.

The generator voltage and frequency shall be at least 4160 volts and 57 Hz within 11 seconds after the start signal.

The steady-state generator voltage and frequency shall be maintained within 4160 1 420 volts and 60 i 1.2 Hz during this test.

McGUIRE - UNITS 1 and 2 3/4 8-5 Amendment No. 71 (Unit 1)

Amendment No. 52 (Unit 2)

A

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3/4.8~ ELECTRICAL POWER' SYSTEMS BAS'ES 3/4.8.1, 3/4.8.2 AND 3/4.8.'3 A.C. SOURCES, D.C. SOURCES AND ONSITE POWER.

' DISTRIBUTION SYSTEMS The OPERABILITY of the A.C. and D.C power' sources and associated

1..

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 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.

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.

i 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 A.C. and D.C. source allowable out-of-

' service times are based on Regulatory Guide 1.93, " Availability of Electrical

-Power Sources", December 1974.

When one diesel generator is inoperable, there is an additional ACTION requirement to verif subsystems, trains, components and devices, y that all required systems, that depend on the remaining OPERABLE diesel generator as a source of emergency power, are also OPERABLE, and that the steam-driven auxiliary feedwater pump is OPERABLE. This require-ment is intended to provide assurance that a loss-of-offsite power event will not result in a complete loss of safety function of critical systems during the period one of the diesel generators is inoperable.

The term verify as used in this context means to administratively check by examining logs or other in-formation to determine if certain components are out-of-service for maintenance or other reasons.

It does not mean to perform the Surveillance Requirements needed to demonstrate the OPERABILITY of the component.

The ACTICN requirements for diesel generator testing in the event of the inoperability of other electric i

power sources also reflect the potential for degradation of the diesel genera-tor due to excessive testing.

This concern has developed, concurrently with increased industry experience with diesel generators, and has been acknowledged t-by the NRC staff in Generic Letter 84-15.

~

The OPERABILITY of the minimum specified A.C. and D.C. power sources and i

associated distribution systems during shutdown and refueling ensures that:

L

.(1) the facility can be maintained in the shutdown or refueling condition for i

extended time periods, and (2) sufficient instrumentation and control capability is available for monitoring and maintaining the unit status.

The Surveillance Requirements for demonstrating '.he 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 Generatcr 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; also, Generic Letter 84-15, which modified the test-ing frequencies specified in Regulatory Guide 1.108.

McGUIRE - UNITS 1 and 2 B 3/4 8-1 Amendment No. 71 (Unit 1)

Amendment No. 52 (Unit 2)

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o ELECTRIC POWER SYSTEMS BASES A.C. SOURCES, D.C. SOURCES AND ONSITE POWER DISTRIBUTION SYSTEMS (Continu The Surveillance Requirement for demonstrating the OPERABILITY of the station batteries are based on the recommendations of Regulatory Guide ?.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 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 4.8-3 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 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 4.8-3 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 gravity and that the overall capability of the battery will be maintained within an acceptable Ifmit; 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.

McGUIRE - UNITS 1 and 2 B 3/4 8-2

!.mendment No. 71 (Unit 1)

Amendment No. 52 (Unit 2)

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