Text

Proposed Tech Specs Re EDG Allowed Outage Time
	ML20202E155
Person / Time
Site:	North Anna
Issue date:	02/09/1998
From:	; VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.)
To:	;
Shared Package
ML20202E152	List: ML20202E148; ML20202E155;
References
	NUDOCS 9802180085
	Download: ML20202E155 (11)
	v • d • e

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.s Attachment 2 Administrative Changes to Proposed Tachnical Specification Change-2 9902180095 980209 ;

-PDR ADOCK 05000338 P PDR .;

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ELECTRICAL POWER SYSTEMS LIMITING CONDITION FOR OPERATION AC710N: (Continued)

1. If one or more cf the three diesel generators (i.e., AAC DG or opposite unit's EDGs) re<;uired for entry into the 14 day action statemen' is(are) inoperable at the start of the 14 day action statement, restore the diesel generator (s) 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 IIOT STANDBY within the

r. ext 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months and in COLD SHIJ! DOWN within the next following 30 hours3.472222e-4 days 0.00833 hours 4.960317e-5 weeks 1.1415e-5 months .

2. If one or more of the three diesel generators (i.e., AAC DG or opposite unit's EDGs) required for entry into the 14 day action statement become(s) inoperable during the 14 day action statement, restore the diesel generator (s) 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 t next 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months and in COLD SHUTDOWN within the next following 30 hours3.472222e-4 days 0.00833 hours 4.960317e-5 weeks 1.1415e-5 months .

c. With one offsite circuit and one EDG inoperable, demonstrate the OPERABILITY of the remaining A.C. sources by perfur.ning Surveillance Requirement 4.8.1.1.1.a within one hour ar.d at least once per 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months thereafter; and if the EDG became inoperable due to any cause other than an inoperable support system, an indepensie ntly testabk component, or preplanned preventative maintenance or testing, demonstrate the OPERABILITY of the remaining OPERABLE EDG by performing Surveil'ance 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 absence of any potential common mode failure for the remaining EDG is l demonstrated. Restore 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 "estore the other A.C. power source (offsite circuit or EDG) to OPERABLE status m accordance with the provisions of l ,

Section 3.8.1.1 Action Statement a or b, as appropriate with the time requirement of that Action Statement based on the time ofinitialloss of the reinaining inoperable A.C. power source.

d. With two of the required offsite A.C. circuits inoperable, restore one of the inoperable offsite sources to 0"ERABLE 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 . Following restoration of one offsite source, follow Action Statement a with the time requirement of that Action Statement based on the time ofinitialloss of the remaining inoperable offsite A.C.

ci.cm This action is required to be corapleted regardless of when the inoperable EDG is restored to OPERABILITY.

]

NORTH ANNA - UNIT 1 l'48-2 Amendment No. F3, "21, l

FI FCTRICAL POWER SYSTEMS SURVE!LLANCE REQUIREMENTS 4.8.1.1.1 Each of the above required physically independent circuits between the offsite transmission network and the onsite Class IE distribution system shall be:

a. Determined OPERABLE at least once per 7 days by verifying correct breaker alignment indicating power availability.

b. Demonstrated OPERABLE at least once per 18 months during shutdown by manually transferring the onsite Class 1E power supply from the normtu circuit to the alternate circuit.

4.8.1.1.2 Each emergency diesel generator (EDG) shall be demonstrated OPERABLE:

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a. In accordance with the frequency specified in Table 4.8.2 en a STAGGERED TEST SASIS by:

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1. Verifying the fuel level in :1 e day tan!:.

2. Verifying the fuel level in th.: fuel storage tank.

3. Verifying the fuel transfer pump can be started and transfers fuel from the storage system to the day tank.

4. Verifying the EDG can start ** and gradually accelerate to synchronous speed l (900 rpm) with generator voltage and frequency at 4160 t 420 volts and 60 t p 1.2 Hz. Subsequently, verifying th:: generator is synchronized, gradually loaded ** to an indicated 2500-2600 kw*** and operates for at least 60 mino:es.

(

5. Verifying the EDG is aligned to provide standby power to the associated l-emergency busses,

b. At least once per 92 days by verifying that a sample of diesel fuel from the fuel storage tank is within the acceptable limits specified in Table 1 of ASTM D975-74 when checked for viscosity, water and sediment.

This test shall be conducted in accordance with the manufacturer's recommendations regarding engine prelube and warmup procedures, and as applicable regarding loading recommendations.

- - This band is meant as guidance to avoid routine overloading of the engine. Loads in excess of this band for special testing under direct monitoring of the manufacturer or momentary variations due to changing bus loads shall not invalidate the test.

NORTH ANNA - UNIT 1 3/48-3 Amendment No. IG,

ELECTRICAL POWTR SYSTEMP

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SURVEILLANCE REQUIREMENTS 4.8.1.1.2 (Continued)

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

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a. Verifying de-energization of the emergency busses and load shedding from the emergency busses,

b. Verifying the EDG starts ** on the auto-start signal, energizes the [

emergency busses with permanently connected loads within 10 seconds, energizes the auto-connected shutdown loads through the sequencing timers and operates for greater than or equal to 5 minutes whi'e its generator is loaded with the shutdown loads. After energization of these ,

loads, the steady state voltage and frequency shall be maintained at 4160 i 420 volts and 60 t 1.2 Hz.

4 Verifying that on an ESF actuation test signal (v ithout loss of offsite power) the EDG starts ** on the auto-start signal and operates on standby for greater than or equal to 5 minutes.

5. Simulating a loss of offsite power in conjunction with an ESF actuation test i l

signal, and

a. Verifying de-energization of the s.oergency busses and load shedding from the emergency busses,

b. Verifying the EDG starts ** on the acto-start signal, energizes the l emergency busses with permanently connected loads within 10 seconds, energizes the auto-connected emergency (accident) loads through the sequencing timers and operates for greater than or equal to 5 minutes and mainta!ns the steady state voltage and frequency at 4160i420 volts and 60 i 1.2 Hz.

c. Verifying that all EDG trips, except engine overspeed, generator l differential and breaker overcurrent are automatically bypassed upon loss of voltage on the emergency bus and/or a safety injection actuation signal.

6. Verifying the EDG 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 EDG shall be loaded to an indicated target value of 2950 kw (between 2900-3000 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 EDG shall be loaded to an indicatert 2500-2600 kw***.

This test shall be conducted in accordance with the manufacturer's recommendations regarding engine prelube and warmup procedures, and as applicable regarding leading recommendations.

- - This band is meant as guidance to avoid routine overloading of the engine. Loads in excess of this band for special testing under direct monitoring of the manufacturer or momentary variations due to changir.g bus loads shall not invalidate the :est.

NORTH ANNA - UNIT 1 3/4 8-3t, Amendment No. U, j l

p ,-

ELECTRICAL POWER SYSTEMS

\ ,

f'able 4.8-2 EMERGENCY DIESEL GENERATOR TEST SCHEDULE l Number of Failums in Number of Failures in Last 20 Wli&Y Last 100 Valid Tests

Test Freauency s1 $4 Once per 31 days 2 2** 25 Once per 7 days

'4 Criteria for determining number of failures and number of valid tests shall be in accordance with Regulatory Pcsition C.2.e of Regu:atory Guide 1.108, but detennined on a per emergency diesel generator basis.

l c For the purposes of determining required test frequency, the previous test failure count may be reduced to zera if a complete diesel overhaul to like-new conditions is completed, I provided that the overhaul including appropriate 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 4.8.1.11.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 beco performed and the ntimber of failures in the last 20 valid demands has been reduced to one.

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NORTH ANNA - UNIT 1 3/4 8. % Amendment No. 33, L _ _ _ - - . _ _ -

3/18 ELECTRICAL POWER SYSTEMS BAS'ES 3/4.8.1 and 3/4.8.2 A.C. and D.C. POWER SOURCES AND DISTRIBUTION 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 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 D. ~'. power sources and distribution systems satisfy the requirements of General Design Criteria 17 of Appendix "A" to 10 CFR 50.

For each EDG, the fuel oil transfer system shall be capable of automatically transferring fuel oil to the associated EDG day tank in sufficient quantities to maintain adequate day tank level to support full load operation of the EDG.

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 accideri. analyses and are based upon maintaining at least one of each of the vndte A.C. and D.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 on ite A.C. source.

Entering the 14 day EDG action statement during power operation has been shown to result in a small increase in the core damage frequency, providing the Ahernate A.C. diesel generator (AAC DG)is OPERABLE and the opposite unit's EDGs are both OPERABLE. Removal of other components from service during the action statement is governed by administrative procedures.

The EDG and AAC DG annual unavailability is limited by the Maintenance Rule Program.

When one or more of the diesel generators (i.e., AAC DG or opposite unit's EDGs) required to enter the 14 day action statement is inoperable or becomes inoperable during the fourteen day action statement of the affected EDG, a 72 hour8.333333e-4 days 0.02 hours 1.190476e-4 weeks 2.7396e-5 months action statement is entered. If the three diesel generators (i.e., AAC DG or the opposite unit's EDGs) required to support entry into the fourteen day action statement are restored to 0PERABLE status within 72 hours8.333333e-4 days 0.02 hours 1.190476e-4 weeks 2.7396e-5 months , the remainder of the 14 day action statement can be used. Restoring the affected EDG to service removes the conditional OPERABILITY requireraents for the AAC DG and opposite unit's EDGs. ,

NORTH ANNA - UNIT I B 3/4 8-1 Amendment No. 33,97,156,244 j

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3MJ ELECTRIC /LPOWER SYSTEMS BAS'ES _

3/4.8.1 and 3/4.8.2 ADad D.C. POWER SOURCES AND DISTRIBUTION (Continued)

The operability requirements for the AAC DG are specined in the Techncal Requirements Manual. In addition, to be considered OPER ABLE to support the fourteen day action statement the AAC DG must be capable of providing power to the affected bus (i.e., connectable to the bus with the associated breakers and control power available), if the AAC DG becomes inoperable during the 14 day action statement, the OPERABILITY of the remaining EDGs does not need to

, be demonstrated since the AAC DG was designed and purchased according to specifications which adequately ensure that common cause failure is not likely.

The ACTION requirements specified in Modes 5 and 6 address the condition where <

sufficient power is unavailable to recover from postulated events (i.e., fuel handling accident).

Implementation of the ACTION requirements shall not preclude completion of actions to establish a safe conservative plant condition. Completion of the requirements will prevent the cccurrence of postulated events for which mitigating actions would be mquired.

The OPERABILITY of the minimum specified A.C. and D.C. power sources and associated distribution systems d' iring shutdown and refueling ensures that 1) the facility c . oe maintained in the shutdown or refueling condition for extended time periods,2) sufficient instrumentation and control capability is available for monitoring and maintaining the unit status, and 3) sufficient power is available for systems necessary to recover from postulated events in these MODES, e.g., the control room emergency ventilation system faas during a fuel handling accident.

The Surveillance Requirements for demonstrating the OPERABILITY of the diesel generators are in accordance with the recommendations of Regulatory Guide 1.9 " Selection of Diesel Generator Set Capacity for Standby Power Supplies," March 10,1971, and 1.108 " Periodic Testing of Diesel Generator Units Used as Onsite Electric Power Systems at Nuclear Power Plants" Revision 1, August 1977, as modified by Amendment No. 83 issued Angust 22,1986.

The Surveillance Requirements for demonstrating the OPERABILITY of the Emergency ,

^

Diesel Generator batteries and the Station batteries are based on the recommendations of Regulatory Guide 1.129," Maintenance, Testing and Replacencut of Large Lead Storage Batteries for Nuclear Power Plants," February 1978, and IEEE Std. 450-1980. "!EEE Recommended Pr.ctice for Maintenance, Testing and Replacement of Large Lead Storage Batieries fo'r Generating Stations and Substations," as modified by Amendment No. 97 issued March 25,1988.

NORTH ANNA - UNIT I B 3/4 8-2 Amendment No. -24B

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ELECTRICAL POWER SYSTEMS LIMIT".NG CONDITION FOR OPERATION ACTION: (Continued)

l. If one or more of the three diesel generators (i.e., AAC DG or opposite unit's EDGs) required for entry into the 14 day action statement is(are) inoperab!e at the start of the 14 day action statement, restore the diesel generator (s) 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 IlOT STANDBY within the next 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months and in COLD SilUTDOWN within the next following 30 hours3.472222e-4 days 0.00833 hours 4.960317e-5 weeks 1.1415e-5 months .

2. If one or more of the three diesel generators (i.e., AAC DG or opposite unit's EDGs) required forentry into the 14 day action statement become(s) inoperable during the 14 day action statement, restore the diect generator (s) to OPERABLE status within 72 hours8.333333e-4 days 0.02 hours 1.190476e-4 weeks 2.7396e-5 months or be . 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 next following 30 hours3.472222e-4 days 0.00833 hours 4.960317e-5 weeks 1.1415e-5 months ,

c. With one offsite circuit and one EDG inoperable, demonstrate the OPERABILITY of ne remaining A.C. sources by performing Surveillance Requirement 4.8.1.1.1.a withic 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 if the EDG became inoperable due to any cause other than an inoperable support system, an independently testable component, or preplanned preventative maintenance or te.;ti.ig, demonstrate the OPERABILITY of the remaining OPERABLE EDG by performing Surveillance Requirement 4.8.i.l.2.a.4 within 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months *, unless the absence of any potential common mode fdlure for the remaining EDG is l demonstrated. Restore one of the inoperable sources to OPERADLE 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 the other A.C. power source (offsite circuit or EDG) to OPERABLE status in accordance with the provisions of l Section 3.8.1.1 Action Statement a or b, as appropriate with the time requirement of that Action Statement based on the time ofinitialloss of the remaining inoperable A.C. power source.

d. With two of the required offsite A.C. circuits ii. operable, restore 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 a 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 . Following restoration of one offsite source, follow Action Statement a with the time icquirement of that Action Statement based on the time of initial losc of the remaining inoperable offsite A.C.

circuit.

I This action is required to be completed regardless of when the inoperable EDG is restored to OPERABILITY.

NORTH ANNA - UNIT 2 3/4 8-2 Amendment No. A8,70, "5,

El ECTRICAL POWER SYSTEMS SURVEILLANCE REQUIREMENTS 4.8.1.1.1 Each of the above required physically independent circuits between the offsite transmission netwonk and the onsite Class IE distribution systera shall be:

a. Determined OPERABLE at least once per 7 days by verifying corrst breaker alignment iadicating power availability.

b. Demonstrated OPERABLE at least once per 18 months during shutdown by manually transferring the onsite Class IE power supply from the normal circuit to the alternate circuit.

4.S.i.1.2 Each emergency diesel generator (EDG) shall be demonstrated OPERABLE:

l

a. In accordance with the frequency specified in Table 4.8.2 on a STAGGERED ;

TEST BASIS by:

1. Verifying the fuel'c elin the day tank.

2. Verifying the fuel level in the fuel storage tank.

3. Verifying the fuel transfer pump can be started and transfers fuel from the storage system to the day tank.

4. Verifying the EDG can start ** and gradaally accelerate to_ synchronous speed l (900 rpm) with generator voltage and frequency at 4160 i 420 volts and 60 1.2 Hz. Subsequently, verifying the generator is synchronized, gradually loaded ** to an indicated 2500-2600 kw* ** and operates for at least 60 minutes. ;

5. Verifying the EDG is aligned to provid: standby power to the associated emergency busses.

b. At least once per 92 days by verifying that a sample of diesel fuel from the fuel i storage tank obtain:d as a DRAIM sample in accordance with ASThl-D270-65, i-within the acceptable limits specified in Table 1 of ASTM D975-74 when checked for viscosity, water and sediment.

c. At least once per 184 days, the EDG shall be started ** and accelerated to at least l

900 rpm in less than or equal to 10 seconds. The generator voltage and frequency

. shall be 4160 i 420 volts and 60 i 1.? Hz within 10 seconds after the start signal.

This ted shall be conducted in accordance with the manufacturer's recommeno.itions regarding engine prelebe and warmup procedures, and as applicable regarding loading recommendations

- - This band is meant as guidance to avoid routine overloading of the engine. Loads in excess of this band for special testing under direct monitoring of the manufacturer or momentary variations due to changing bus loads shall not invalidate the test.

NORTH ANNA - UNIT 2 3/4 8-3 Amendment No. 48,

ELECTRICAL POWER SYSTEhtS

' SURVEILLANCE REQUIREMENTS _ _

4.8.1,1.3 (continued)

b. At least once per 92 days and within 7 days after a battery discharge where the battery terminal voltage decreased below 110 volts or battery overcharge above 150 volts, by verifying that:

1. The parameters in Table 4.8-3 meet Category Il limits and

2. There is nc Whle corrosion at either terminals or connectors, or the connectic, rr ace of these items is less than 150 x 10 to the minus 6 ohms.

c. At least once pc IS months by verifying that:

1. The cells, cell plates and battery racks show no visual indication of physical damage or ab iormal deterioration.

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

3. The resistance of each cell-to-e-ll and terminal connection is less than or equal to 150 x 104 ohms.

4. The battery charger will supply at least ten amperes at 125 volts for at least 4 hours4.62963e-5 days 0.00111 hours 6.613757e-6 weeks 1.522e-6 months .

d. At least once per 60 months, during shutdown, by verifying that the battery capacity is at least 807c of the manufacturer's rating when subjected to a performance discharge test.

c. At least once per 18 months, during shutdown, perform a performance discharge test of battery capacity if the battery shows signs of degradation or has reached 85%

of its service life expected for the application. Degradation is indicated when the battery capacity drops more than 107c of rated capacity from its average from c previous performance discharge tests, or is below 90% of the manufacturer's rating.

4.8.1.1.4 For each underground EDG fuel oil storage tank perform the following at least once l per 10 years:

1. Drain each fuel oil storage tank

2. Remove sediment from each fuel oil storage tank

3. Irspect cad. fuel eil storage tank for integrity

4. Clean each fuel oil storage tank I

i NORTH ANNA - UNIT 2 3/4 8-6a Amendment No. A7, AR,81,442,

{

e; b

.1 Table 4.8-2 EMERGENCY DIESEL GENERATOR TEST SCHEDITiE -

l Number of Failures in Number of Failures in I mt 20 Valid Tests * - Last 100 Valid Tests * - . Test Freauency

- 51: :s4 Once per 31 days 22**- 25 : 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 emergency.diesci generator basis.

l For the purposes of determining required tett 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 overhau.1 inch' ding appropriate post-maintenance operation and testing, is -

specifically approved by the manufacturer and if acceptable reliability has been .

-demonstrated. The rel.iability 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 accordande 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 ;

idemands have been performed and the number of failures in the last 20 valid demands has been reduced to one.

\--. s-

~ r NORTH ANNA - UNIT 2. 3/48-9. Amendment No. 48,

3]M ELECTRICAL POWER SYSTEMS

' B A$ ES .

during the 14 day action statement, the OPERABILITY of the remaining EDGs does not need to be demonstrated since the AAC DG was designed and purchased according to specifications which adequately msure that common cause failure in not likely.

The ACTION requirements specified in Modes 5 and 6 address the condition where sufficient power is unavailable to recover from postulated events (i.e., fuel handling accident).

Implementation of the ACTION requirements shall not preclude completion of actions to establish

-a safe conservative plant condition. Completion of the requirements will prevent the vcurrence of postulated events for which mitigating actions would be required.

..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,2) sufficient instrumentation and control capability is available for monitoring and maintaining the unit status, and 3) sufficient power is available for systems necessary to recover from postulated events in these MODES, e.g., a fuel handling accident.

The Surveillance Requirements for demonstrating the OPERABILITY of the Emergency l Diesel Generators are in accordance with the recommendations of Regulatory Guide 1.9 " Selection of Diesci Generator Set Capacity for Standby Power Supplies," March 10,1971, and 1.108 )

" Periodic Testing of Diesel Generator Units Used as Onsite Electric Power Systems at Nuclear Power Plants" Revision 1, August 1977, as modified by Amendment No. 48 issued August 22, l 1986.

The Surveillan;e Requirements for demonstrating the OPERABILITY of the Emergency

. Di:sel Generator batteries and the Sta' ion batteries are based on the recommendations of Regulatory Guide 7.129," 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," as modified by Amendment No. 84 issued March 25,1988.

Con:ainment electrical penetration and penetration conductors are protected by either de-energizing circuits not required during reactor operation or by demonstrating the OPERABILITY of primary aad backup overcurrent protection circuit breakers during period surveillance.

NORTH ANNA - UNIT 2 B 3/4 8-2 Amendment No.14484

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ML20202E155

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