ML20199G416

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Revised Proposed TS Pages,Establishing 14 Day AOT Applicable Whenever EDG Is Inoperable
ML20199G416
Person / Time
Site: North Anna  Dominion icon.png
Issue date: 11/18/1997
From:
VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.)
To:
Shared Package
ML20199G403 List:
References
NUDOCS 9711250174
Download: ML20199G416 (34)
v • d • e


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9

'l .0 ' DEFINITIONS (Continued) f ENGINEERED SAFETY FEATURE RESPONSE TIME -

1,12- The ENGINEERED SAFETY FEATURE RESPONSE TIME shall be that time interval-from when the monitored parameter exceeds its ESF actuation setpoint at the channel sensefuntil -

the ESF equipment is capable _of performing its safety function (i.e., the valves travel to their-i required positions, pump discharge pressures reach their required values, etc.). Times shall include '

emergency diesel generator starting and sequence loading delays where applicable. l -l FREOUENCY NOTATION t 1.13 The FREQUENCY NOTATION specified for the performance of Surveillance Requirements shall conespond to the intervals defined in Table 1.2.

FULLY WITHDRAWN l 1.13a The control bank FULLY WITHDRAWN position shall be within the interval of 225 to 229 steps withdrawn, inclusive, Definition of the FULLY WITHDRAWN position for each specific cycle shall be documented in the rod insertion limit operator curve, i

GASEOUS RADWASTE TREATMENT SYSTEM Ll4 A GASEOUS RADWASTE TREATMENT SYSTEM is the system designed and installed

_ to reduce radioactive gaseous effluents by collecting primary coolant system offgases from the primary system and providing for delay or holdup for the purpose of reducing the total radioactivity

, prior to release ia the environment. The system is composed of the waste gas deccy tanks,-

regenerative heat exchanger, waste gas charcoal filters, process vent blowers, waste gas surge tanks

,. and waste gas diaphragm compressor.

IDENTIFIED LEAKAGE 1.15 IDENTIFIED LEAKAGE shall be:

a. Leakage (except CONTROLLED LEAKAGE) into closed systems, such as pump seal or valve packing leaks that are captured and conducted to a sump or collecting tank, or
b. Leakage into the containment atmosphere from sources that are both specifically located and known either not to interfere with the operation of leakage detection -

systems or not to be PRESSURE BOUNDARY LEAKAGE, or

c. - Reactor coolant system leakage through a steam generator to the secondary system.

MEMBER (S) OF THE PUBLIC -

1,16 MEMBER (S) OF THE PUBLIC shall include allindividuals who by virtue of their occupational status have no formal association with the plant. This category shall include non-empl_oyees of the licensee who are permitted to use portions of the site for recreational, occupational, or other purposes not associated with plant functions. This category shall no.1 include non-employees such as vending machine servicemen or postmen who, as part of their formaljob function, occasionally enter an area that is controlled by the licensee for purposes of protection of -

individuals from exposure to radiaticn and radioactive materials.

NORTH ANNA - UNIT 1 1-3 Amendment No. 44" M6, 49,

3/1E liLECTRICAL POWER. SYSTEMS 3/4.8.1 Af 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 IE distribution system, and
b. Two separate and independent emergency die:el generators (EDGs): l
1. Each with a separate day tank containing a minimum of 450 gallons of fuel, and
2. A fuel storage system consisting af two underground storage tanks each containing a minimum of 45,000 gallons of fuel (This is a shared system with Unit 2), and
3. A separate fuel transfer system.

APPLICABilEY- MODES 1,2,3 and 4 ACTION:

a. With one offsite circuit of 3.8.1.1.a inoperable, demonstrate the OPERABILITY of the remaining A.C. sources by performina Surveillance Requirement 4.8.1.1.1.a within I hour 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. Restore the offsite circuit 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 COLD SilUTDOWN within the following 30 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br />,
b. With one EDG of 3.8.1.1.b inoperable, demonstrate the OPERABILITY of the l offsite A.C. power sources by performing Surveillance Requirement 4.8.1.1.1.a within I hour 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. If the EDG is inoperable due l to any cause other than an inoperable support system, an independently testabic component, or preplanned preventive maintenance or testing, demonstrate the OPERABILITY of the remaining OPERABLE EDG by performing Surveillance Requirement 4.8.1.1.2.a.4 within 24 incurs *, unless the absence of any potential common mode failure for the remaining EDG is demonstrated. Restore the EDG to OPERABLE status within 14 days if the A AC DG and the opposite unit's EDGs are OPERABLE 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 SilUTDOWN within the following 30 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br />. In addition:

NORTH ANNA - UNIT I 3/4 8-1 AmeM=-'

  • 3,!28,' 4 ,203

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

1. 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) inoperable at the start of the 14 day action statement, restore the diesel generator (s) 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 IIOT 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 next following 30 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br />.
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 <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 COLO SHUTDOWN within the next follow.ag 30 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br />,
c. With one of fsite circuit and one EDG inoperable, demonstrate the OPERABILITY of the remaining A.C. sources by performing Surveillance Requirement 4.8.1.1.1.a 4 within one hour 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 if the EDG became inoperable due to any cause other than an inoperable support system, an independently testable component, or prepinnned preventative maintenance on testing, demonstrate the OPERABILITY of the remaining OPER ABLE EDG by performing Surveillance Requirement 4.8.1.1.2.a.4 within 'ours*, unless the absence of any potential common mode failure for the remaining EDG is demonstrated. Restore 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 IIOT 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 />. 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 inoperable, restore 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 />. 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.

circuit.

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

NORTH ANNA - UNIT 1 3/48-2 Amendment No. 83, !M, j l

FI FCTRICAL POWER SYSTEMS LIMITING CONDITION FOR OPERATION-ACTION: (Continued);

e. .-With two of the above required EDGs inoperable, demonstrate the OPERABILITY of tv'o offsite A.C. circuits by performing Surveillance Requirement 4.8.1.1.1.a v:; thin one hour 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; restore one of the

' inoperable EDGs 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 SilUTDOWN within the following 30 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br />. Following restoration of one EDG, follow Action Statement b with the time requirement of that Action Statement based on the dme ofinitialloss of the remaining inoperable EDG.

f. With one underground fuel oil storage tank of 3.8.1.1.b.2 inoperable for the performance of Surveillance Requirement 4.8.1.1.4 or for tank repairs:
1. Verify 45,000 gallons of fuel is available in the operable underground fuel oil storage tank at least once per 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br />,
2. Verify a minimum of 100,000 gallons of fuel is maintained in the above ground main fuel oil storage tank at least once per 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br />,
3. Verify an available source of fuel oil and transportation to supply 50,000 gallons of fuel in less than a 48 hour5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br /> period, and
4. Restore the storage tank to OPERABLE status within 7 days or place both'U nits in at least IIOT 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 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 />.

' L NORTH ANNA- UNIT 1 3/4 8-2a Amendment No. 433, .

El ECTRICAL POWER SYSTEMS SURVEILLANCE REQUIREMENTS 4.8.1.1.1 Each of the above required physically independent circuits between the offsite transmission network and the onsite Class lE 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 powe supply from the normal circuit to the alternate circuit.

4.8.1.1.2 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 level in 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 gradually accelerate to synchronot.s speed l (900 rpm) with generator voltage and frequency at 41601420 volts and 60 i 1.2 liz. Subsequently, verifying the generator is synchronized, gradually loaded ** to an indicated 2500-1600 kw*** and operates for a least 60 minutes.
5. Verifying the EDG is aligned to provide 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 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 excest 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.

NORTil ANNA - UNIT 1 3/4 8-3 Amendment No. 83,

El EC11(ICAL POWER SYSTEMS I

SURVEILLANCE REQUIREhlENTS 4.8.1.1.2 (Continued)

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 41601420 volts and 60 i 1.2 Hz within 10 seconds after the start signal.

The EDG shall be manually synchronized to its appropriate emergency bus, l gradually loaded ** to an indicated 2500 to 2600 kw***, and operated for at least 60 minutes. The EDG shall be started for this test by using one of the following l signals on a rotating test basis:

a) Simulated loss of offsite power by itself.

b) Simulated loss of offsite power in conjunction with an ESF actuation test signal.

c) An ESF actuation test signal by itself.

This test, ifit is performed so it coincides with the testing required by Surveillance Requirement 4.8.1.1.2.a.4, may also serve to concurrently meet those requirements 8

as well.

d. At ast once per 18 months during shutdown by:
1. Verifying that, on rejection of a load of greater than or equal to 610 kw, the l voltage and frequency are maintained with 4160 i 420 volts and 60 t 1.2 Hz.
2. Verifying that the load sequencing timers are OPERA 13LE with times l within the tolerances shown in Table 4.8-1,
    • This test shall be conducted in accordance with the manufacturer's recommend,tions 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 unde: direct monitoring of the manufacturer or momentary variations due to changing bus loads shall not invalidate the test.

l NORTH ANNA - UNIT 1 3/4 8-3a Amendment No F', B1,

ELECTRICAL POWER SYSTEMS SURVEILLANCE REQUIREMENTS 4.8.1.1.2 (Continued)

3. Simulating a loss of offsite power by itself, and: l
a. Verifying de-c nergization of the emergency busses and load shedding from the emergency busses.
b. Verifying the EDG starts ** on the auto-start signal, energizes the l 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 while 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 i 1.2 Itz.
4. Verifying that on an ESF actuation test signal (without 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 l signal, and
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, er ergizes the l emergency busses with permanently connected loads within 10 seconds, enegizes the auto-connected emergency (accident) loads through the sequencing timers and operates for greater than or equal to 5 minutes and maintains the steady state voltage and frequency at 41601420 volts and 60 1.2 liz.

c. Verifying that all EDG trips, exc^pt 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 <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 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 <br />0.00611 hours <br />3.637566e-5 weeks <br />8.371e-6 months <br /> of this test, the EDG shall be loaded to an indicated 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 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.

NORTil ANNA - UNIT 1 3/4 8-3b Amendment No. 4,

l El ECTRICAL POWER SYSTEMS SURVEILLANCE REQUIREMENTS 4.8.1.1.2 (Continued)

7. Verifying that the auto-connected loads to each EDG do not exceed the l 2000 hour0.0231 days <br />0.556 hours <br />0.00331 weeks <br />7.61e-4 months <br /> rating of 3000 kw.
8. Verifying tt e EDG's capability to:

a) Synchronize with the offsite power source while the EDG is loaded with its emergency loads upon a simulated restoration of offsite power, b) Transfer its loads to the offsite power source, and c) Proceed through its shutdown sequence.

9. Verifying that the following EDG lockout features prevent EDG starting j l only when required:

a) Remote Local Selection Switch b) Emergency Stop Switch h

10. Verifying the EDG's hot restart capability by:

a) Operating the EDG** loaded to an indicated 2500 to 2600 kw*** for 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> or until operating temperatures have stalihzed, and b) Within 5 minutes of shutdown verify the EDG can be started ** and l accelerated to at least 900 rpm in less than or equal to 10 seconds. The generator voltage and frequency shall be 4160 t 420 volts and 60 1.2 liz within 10 seconds after the start signal.

c. At least once per 10 years or after any modifications which could affect EDG interdependence by starting ** both EDGs simultaneously, during shutdown, and verifying that both EDGs accelerate to at least 900 rpm in less than or equal to 10 seconds.
f. Once per 18 months during any mode of operation, by subjecting each EDG to a preventive maintenance inspection in accordance with maintenance procedures appropriate for diesels used for this class of standby service.

This tut 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 3/4 8-3c Amendment No. 83, "5, 'P1,

El ECTRICAL POWER SYSTEMS SURVEILLANCE REQUIREMENTS 4.8.1.1.3 Each emergency diesel generator 125-volt battery bank and charger shall be l demonstrated OPERABLE:

a. At least once per 7 days by verifying that:
1. The parameters in Table 4.8-3 neet Category A limits and
2. The total battery terminal voltage is greater than or equal to 129 volts on a float charge.
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 B limits and
2. There is no visible corrosion at either terminals or connectors, or the connection resistance of these items ir less than 150 x 10 to the minus 6 ohms.
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 cell-to-cell and terminal connections are clean, tight and coated with anti-corrosion material.
3. The resistance of each cell-to-cell and terminal connection is less than or equal to 150 x 10-6 ohms.
4. The battery charger will supply at least 10 amperes at 125 volts for at least 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br />, i At least once per 60 months, du%g shutdown, by verifying that the battery capacity is at least 80% 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 oattery 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 10% of rated capaci y from its average from previous performance discharge tests, or is below 90% of the manufacturer's rating.

nRTH ANNA - UNIT 1 3/4 8 4 Amendment No. E3rW,

~ _

1 ELECTRICAL POWER SYSTEMS Table 4.8-2 EMERGENCY DIESEL GENERATOR TEST SCHEDULE l Number of Failures in Number of Failures in Last 20 Wlid Tests

  • Last 100 Valid Tests
  • Test Frecuency 51 54 Once per 31 days M2** 25 Once per 7 days

For the purposes of determining 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 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 tesis 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.

NORTH ANNA - UNIT 1 3/4 8-4c Amendment No. KL,

I ELECTRICAL POWER SYSTEMS 1

SURVEILLANCE REQUIREMENTS 48.1.1.4 For each underground EDG fuel oil storage tank perform the following at least once per l 10 years:

1. Drain each fuel oil storage tank
2. Remove sediment from each fuel oil storage tank
3. Inspect each fuel oil storage tank for integrity
4. Clean each fuel oil storage tank.

NORTH ANNA - UNIT I 3/4 8-4d Amendment No. 428,

i ELECTRICAL POWER SYSTEMS SIIUTDOWN LIMITING CONDITION FOR OPERATION 3.8.1.2 As a minimum, one of the following trains of A.C. electrical power sources shall be OPERABLE:

a. One circuit between the offsite transmission network and the onsite Class lE distribution system, and
b. One emergency diesel generator with: l
1. A day tank containing a minimum volume of 450 gallons of fuei;
2. A fuel storage system consisting of two underground storage tanks each containing a minin.um volume of 45,000 gallons of fuel (This is a shared system with Unit 2), and
3. A fuel transfer system.

APPLICABILITY;

a. Modes 5 and 6
b. During movement of irradiated fuel assem'alies or loads over irradiated fuel assemblies when no fuel assemblies are in the reactor vessel.

ACTION;

a. With less than the above minimum required A.C. electrical power sources OPERABLE, immediately suspend all operations involving CORE ALTERATIONS, positive reactivity changes, movement of irradiated fuel assemblics, and movement of loads over irradiated fuel assemblies until the minimum required A.C. electrical power sources are restor-d to OPERABLE status,
b. With one underground fuel oil storage tank of 3.8.1.2.b.2 inoperable for the performance of Surveillance Requirement 4.8.1.1.4 or for tank repairs:
1. Verify 45,000 gallons of fuel is available in the operable underground fuel oil storage tank at least once per 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br />.
2. Verify a minimum of 100,000 gallons of fuel oil is maintained in the above ground main fuel oil storage tank at least once per 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br />, -
3. Verify an available source of fuel oil and transportation to supply 50,000 gallons of fuel in less than a 48 hour5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br /> period, and
4. Restore the storage tank to OPERABLE status within 7 days or place both Units in at least IlOT 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 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 />, and perform ACTION a. above.

FURVEILLANCE REQUIREMENTS 4.8.1.2 The above required A.C. electrical power so'rces shall be demonstrated OPERABLE by the performance of each of the Surveillance Req;irements of 4.8.1.1.i,4.8.1.1.2,4.8.1.1.3, rd 4.8.1.1.4.

NORTH ANNA - UNIT 1 3/48-5 Amendment No. 44v83,128, ' 56 203,

l i

APPLIC4HILITY IIASES .

3.0.5 This specincation delineates what additional conditions must be satisned to permit olwration to continue, consistent with the ACTION statements for power sources, when a normal or emergency power source is not OPERABLE. It specifically prohibits operation when one division is inoperable because its normal or emergency power source is inoperable and a system, subsystem, train, component or device in amher division is inoperable for another reason.

The provisions of this specific tion termit the ACTION statements associated with individual systems, subsystems, trains, components, or devices to be consistent with the ACTION 3

statements of the associated electrical power source. It allows operation to be governed by the time limits of the ACTION statement associated with the Limiting Condition for Operation for the normal or emergency power source, not the individual ACTION statements for each system, subsystem, train, component or device that is determined to be inoperable solely because of the inoperability of its normal or emergency power scurce.

For example, Specificction 3.8.1.1 requires in part that two emergency diesel generators be Ol'ERAllLE. The ACTION statement provides for an out of service time when one emergency l diesel generato; mt OPERABLE. If the denndon of OPERABLE were applied without
consideration 0
Specifbation 3.0.5, all systems, subsystems, trains, components and devices supphed by the inoperable emergency power source would also be inoperable. This would dictate ,

invoking the applicable ACTIOM statements for each of the applicable Limiting Conditions for ,

Operation, llowever,'he provisions of Specincation 3.0.5 permit the time limits for continued operation to be consistent with the ACTION statement for the inoperable emergency diesel generator instead, provided the of her specified conditions are satisfied, in this case, this would mean that the correspond 3 normal power source must be OPERABLE, and all redundant systems, subsystems, trains, components, and devices must be OPERABLE, or otherwise satisfy Speci0 cation 3.0.5 (i.e., be capable of performing their design function and have at least one normal or one emergency power source OPERABLE). If they are not satisfied, shutdown is required in accordance with this 3pecification.

As a further example Specification 3.8.1.1 requires in part tha' 'wo physically independent circuits between the offsite transmission network and the onsite Class lE distribution system be OPER ABLE. The ACTION statement provides a 24 hour2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> out of-service time when both required offsite circuits are not OPERABLE. If the definition of OPERABLE were applied without consideration of Speci0 cation 3.0.5, all systems, subsystems, trains, components and devices supplied by the inoperable normal power sourec, both of the offsite circuits, would also be inoperable. Thii ,vould dictate invoking the applicable NORTil ANNA - UNIT I B 3/4 0-2 Amendment No. 44,

3MJ. REACTIVITY CONTROL SYSTEhtS  ;

i BASES i 3/4.1.1.4 MODERATOR TEMPER ATURE COEFFICIENT (MTC) (Continued) conditions other than those explicitly stated will require extrapolation to those conditions in order to permit an accurate comparison.

The most negative MTC value was obtained by incrementally correcting the M'lC used in i the FSAR analyses to nominal operating conditions. These corrections involved adding the  ;

incremental change in the MTC associated with a core condition of Bank D inserted to an all rods  !

wi.hdrawn condition and an incremental change in MTC to account for measurement uncertainty ,

at RATED TilERMAL POWER conditions. These corrections result in the End of Cycle (EOC)  ;

MTC limit. The 300 ppm surveillance limit MTC value represents a conservative value (with corrections for burnup and soluble boron) at a core condition of 300 ppm equilibrium boron concentration and is obtained by making these corrections to the EOC MTC limit.  ;

Once the equilibrium boron concentration falls below about 60 ppm, dilution operations take an extended amount of time and reliable MTC meassements become more difficult to obtain due to the potential for fluctuating core conditions over the test interval. For this reason, MTC '

measurements may be suspended provided the measured MTC value at an equilibrium full power boron concentration s 60 ppm is less negative than the 60 ppm surveillance limit. The difference between this value and the EOC MTC limit conservatively bounds the maximum credible change in MTC between the 60 ppm equilibrium boron concentration (all rods withdrawn, RATED THERMAL POWER conditions) and the licensed end-of-cycle, including the effect of boron concentration, burnup, and end of cycle coastdown.

The surveillance requirements for measurement of the MTC at the beginning and near the end of each fuel cycle are adequate to conGrm that the MTC remains within its limits since this coefficient changes slowly due principally to the reduction in RCS boron concentration associated ,

with fuel burnup.

3/4.1.1.5 MINIMUM TEMPERATURE FOR CRITICALITY

. This specification ensures that the reactor will not be made critical with the Reactor Coolant System average temperature less than 54 l'F. This limitation is required to ensure 1) the moderator temperature coefficient is within its analyzed temperature range,2) the protective instrumentation is within its nonnal operating range, and 3) the P-12 interlock is above its setpoint, and 4) compliance with Appendix 0 to 10 CFR Part 50 (see Bases 3/4.4.9).

3/4.1.2 BORATION SYSTEMS The boron injection system ensures that negative reactivity controls available during each mode of facility operation. The components required to perform this function include 1) borated water sources,2) charging pumps,3) separate Dow paths,4) boric acid transfer pumps,5) associated heat tracing systems, and 6) an emergency power supply from OPER ABLE emergency l diesel generators, NORTil ANNA ~- UNIT I B 3/4 1-2 Amendment No. 85, ! !2, ' !?, I 446, '

l 3L43 ELECTRICAL POWER SYSTEMS BASES 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 'ar 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.C. 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 assoc'ated EDG day tank in sufficient quantities to maintain adequate day tank level to support full load operation of the EDO.

The ACTION requirements specified fer 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 acciaent analyses and are based upon maintaining at least one of each of the onsite A.C. and D.C. power sources and associated distribution systems OPERABLE during accident conditions coincident with an assumed loss oroffsite power and single failure of the ather onsite A.C. source.

Entering the 14 day EDG action statement during pow er operation has been shown to result in a small increase in the core damage frequency, providing the Alternate 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 actions statement is inoperable or becomes inoperable during the fourteen day action statement of the effected EDG, a 72 hour8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> action statement is entered, if the three diesel generators (i.e., AAC DG or the opposite units EDGs) required to support entry into the fourteen day action statement are restored to OPERABLE status witbin 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br />, the remainder of the 14 day action statement can be used. Restoring the affected EDG to service removes the conditional OPERABILITY requirements for the AAC DG and opposite unit's EDGs NORTil ANNA - UNIT I B 3/4 8-1 Amendment No. 33, o?, ' 56,203

3/18 ELECTRICAL POWER SYSTEhiS IIASES 3/4.8.1 and 3/4.8.2 A.C. and D.C. POWER SOURCES AND DISTRIBUTION (Contmued)

The operability requirements for the AAC DG are sepecified in the Techncal Requirements hianual, in addition, to be considered OPERABLE 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 OPERA BILITY 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 hiodes 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 precluJe completion of actions to establish a safe conservative plant condition. Completion of the requirements will prevent the occurrence 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) sufScient power is available for systems necessary to recover from postulated events in these hiODES, e.g., the control room emergency ventilation system fans during a fuel liandling 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," hiarch 10,1971, and 1.108 " Periodic Testing of Diesel Generator Units Usedas Onsite Electric Power Systems at Nuclear Power Plants" Revision I, August 1977, as modified by Amendment No. 83 issued August 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 R:gulatory Guide 1.129,"hiaintenance, Testing and Replacement of Large Lead Storage Batteries for Nuclear Power Plants " February 1978, and IEEE Std. 450-1980, "lEEE Recommended Practice for hiaintenance, Testing and Replacement of Large Lead Storage Batteries for Generating Stations and Substations," as modified by Amendment No. 97 issued hiarch 25,1988.

NORTil ANNA - UNIT I B 3/4 8-2 Amendment No. -203 I

__ __ _ -1

North Anna Unit 2 Technical Specifications Changes ,

t

?

i l

\

l

'lM DEFINITIONS (Continued)

, . m m.. . .  !

SUCR$1'M SAFETY FEATURE RIISPON91 TIME  !

.%  %. MulNEERED SAFETY FEATURE RESPONSE TIME shall be that time interval +

e c., y.o me monitored parameter exceeds its ESF actuation setpoint at the channel sensor until .  !

r. 'ISP equipment is capsble of performing its safety function (l.c., the valves travel to their i juired positions, pump discharge pressures reach their required values, etc.). Times shall include cmcrgency diesel generator starting and sequence loading delays where applicable.

[ l ,

) FREOUENCY NOTATION .

l.13 The FREQUENCY NOTATION specified for the performance of Surveillance Requirements shall correspond to the intervals denned in Table 1.2.

FULIN WITilDRAWN  !

1.13a The control bank FULLY WITilDRAWN position shall be within the interval of 225 to 229 steps withdrawn, inclusive. Definition of the FULLY WITilDRAWN position for each ,

speelGe cycle shall be documented in the rod insertion limit operator curve.

GASEOUS RADWASTE TREATMENT SYSTEM 1.14 A G ASEOUS RADWASTE TREATMENT SYSTEM is the system designed and installed to reduce radioactive gaseous erduents by collecting primary coolant system offgases trom the primary system and providing for delay or holdup for the purpose of reducing the total radioactivity prior to release to the environment. The system is composed of the waste gas decay tanks, regenerative heat exchanger, waste gas charcoal filters, process vent blowers, waste gas surge tanks and waste gas diaphragm compressor.

IDENTIFIED 1 IIAKAGE 1.15 IDENTIFIED LEAKAGE shall be:

a. Leakage (except CONTROLLED LEAKAGE) into closed systems, such as pump seal or valve packing leaks that are captured and conducted to a sump or collecting tank, or
b. Leakage into the containment atmosphere from sources that are both specincally located and known either not to interfere with the operation ofleakage detection systems or not to be PRESSURE BOUNDARY LEAKAGE, or
c. Reactor coolant system leakage through a steam generator to the secondary system.

hiEMBER(S) OF Tile PUBLIC 1.16 MEMBER (S) OF Tile PUBLIC shall include all individuals who by virtue of their occupational status have no formal association with the plant. This category shall include non-

, employees of the licensee who are permitted to use portions of the site for recreational, occupational, or other purposes not associated with plant functions. This category shall no1 include non-employees such as vending machine servicemen or postman who, as part of their formaljob function, occasionally enter an area that is controlled by the licensee for purposes of protection of individuals from exposure to radiation and radioactive materials.

L NORTil ANNA - UNIT 2- 1-3 Amendment No. 31,130,133,.

-~ _.._._,__,___m.___._.___

3]f3 El ECTRICAL POWER SYSTEMS l

3/4.8.1 A.C. SOURCES l OPERATING ,

LIMITING CONDITION FOR OPERATION 3.8.1.1 As a minimum, the following A.C. electrical pouer sources shall be OPERABLE:

a. Two physically independent circuits between the offsite transmission network and the onsite Class 1E distribution system, and
b. Two separate and independent emergency diesel generators (EDGs): l
1. Each with a separate day tank containing a minimum of 450 gallons of fuel, and
2. A fuel storage system consisting of two underground storage tanks each containing a minimum of 45,000 gallons of fuel (This is a shared system with Unit 1), and
3. A separate fuel transfer system.

APPLICABil_ITY: MODES 1,2,3 and 4.

ACTION:

a. With one offsite circuit of 3.8.1.1.a inoperable, demonstrate the OPERABILITY of the remaining A.C. sources by performing Surveillance Requirement 4.8.1.1.1.a within I hour 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. Restore the offsite circuit 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 llOT 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 COLD SilUTDOWN within the following 30 hourt,
b. With one EDG of 3.8.1.1.b inoperable, demonstrate the OPERABILITY of the offsite A.C. power sources by perfonning Surveillance Requirement 4.8.1.1.1.a within I hour and at Ic st once per 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> thereaftcr. If the EDG is inoperable due to any cause other than an inoperable support system, an independently testable component, or preplanned preventive maintenance or testing, demonstrate the OPERABILITY of the remaining OPERABLE EDG by performing Surveillance Requirement 4.8.1.1.2.a.4 within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />', unless the absence of any poternial common mode failure for the remaining EDG is demonstrated. Restore the EDG to OPERABLE status within 14 days if the AAC DG and the opposite unit's EDGs are OPERABLE or be in at least ilOT 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 SilUTDOWN within the following 30 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br />. In addition:
  • This action is required to be completed regardless of when the inoperable EDG is restored to OPERABILITY NORTil ANNA UNIT 2 3/48-1 Amendment No.18, ! !2, !M, W

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

1. 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 s:atement is(are) inoperable at the start of the 14 day action statement, restore the diesel generator (s) to OPERABLE status withh. 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 ilOT 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 SilUTDOWN within the next following 30 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br />.
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 <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> or be in at least ilOT 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 SilUTDOWN within the next following 30 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br />.
c. With one offsite circuit and one EDG 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 <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> 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 testing, demonstrate the OPERAlllLITY of the remaining OPERABLE EDG by performing Surveillance Requirement 4.8.1.1.2.a.4 within 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> *, unless the absence of any potential common mode failure for the remaining EDG is demonstrated. Restore one of the inoperable sources to OPER ABLE 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 ilOT STANDilY 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 SilUTDOWN within the following 30 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br />. Restore the other A.C. power source (offsite circuit or EDG) to OPER ABLE status in accordance with the provisions of l Section 3.3.1.1 Action Statement a or b, as appropriate with the time requirement of that Action Statement based an the time ofinitialloss of the remaining inoperable A.C. power source.
d. With two of the required offsite A.C. circuits inoperable, restore 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 ilOT STANDBY within the next 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br />. 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.

circuit.

NORTil ANNA UNIT 2 3/482 Amendment No. 4470Aos,

ELECTRICAL l'OWER SYSTEMS LIMITING CONDITION FOR OPERATION ACIJON: (Continued):

e. With two of the above required EDGs inoperable, 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 <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> thereafter; restore one of the inoperable EDGs 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 ilOT 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 SilUTDOWN within the following 30 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br />. Following restoration of one EDG, follow Action Statement b with the time requirement of that Action Statement based on the time ofinitialloss of the remaining inoperable EDO.
f. With one underground fuel oil storage tank of 3.8.1.1.b.2 inoperable for the performance of Surveillance Requirement 4.8.1.1.4 or for tank repairs:
1. Verify 45J)00 gallons of fuel is available in the operable underground fuel oil storage tank at least once per 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br />,
2. Verify a minimum of 100,000 gallons of fuel is maintained in the above ground main fuel oil storage tank at least once per 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br />.
3. Verify an available source of fuel oil and transportation to supply 50/XX) gallons of fuel in less than a 48 hour5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br /> period, and
4. Restore the storage tank to OPER ABLE status within 7 days or place both Units in at least ilOT 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 COLD SilUTDOWN within thc following 30 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br />.

NORTil ANNA - UNIT 2 3/4 8 2a Amendment No. 443,

FI I!CTRICAL POWER SYSTEhiS SURVEll.1,ANCE 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 normal circuit to the alternate circuit.

4.8.1.1.2 Eaci, emergency diesel generator (EDG) shall be demonstrated OPERABLE: l

a. In accordance with the frequency specined in Table 4.8.2 on a STAGGERED TEST BASIS by:
1. Verifying the fuel level in 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 gradually accelerate to synchronous speed l (900 rpm) with generator voltage and frequency at 41601420 volts and 601 1.2 Ilz. Subsequently, verifying the generator is synchronized, gradually loaded" to an indicated 2500-2600 kw"* and operates for a least 60 minutes.
5. Verifying the EDG is aligned to provide 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 storage tank obtained as a DRAIN sample in accordance with ASTM D270-65, is 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 41601420 volts and 60 i 1.2 Ilz within 10 seconds after the start signal.

" 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.

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

El ECTRICAL POWER SYSTEMS SURVEILLANCE REQUIREMENTS 4.8.1.1.2 (Continued)

The EDG shall be manually synchronized to its appropriate emergency bus, l gradually loaded" to an indicated 2500 to 2600 kw"*, and operated for at least 60 minutes The EDG shall be started for this test by using one of the following l signals on a rotating test basis:

a) Simulated loss of offsite power by itself.

b) Simulated loss of offsite power in conjunction with an ESF actuation test signal.

c) An ESF actuation test signal by itself.

This test,ifit is performed so it coincides with the testing required by Surveillance Requirement 4.8.1.1.2.a.4, may also serve to concurrently meet those requirements as well.

d. At least once per 18 months during shutdown by:
1. Verifying that, on rejection of a load of greater than or equal to 610 kw, the l voltage and frequency are maintained with 4160 i 420 volts and 60 i 1.2 liz.
2. Verifying that the load sequencing timers are OPERAllLE with times l within the tolerances shown in Table 4.8 l.
3. Simulating a loss of offsite power by itself, and: l 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 l 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 while 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 i 1.2 IIz.

" 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.

NORTil ANNA - UNIT 2 3/48-4 Amendment No. 70AM,

FIFCTRICAL POWER SYSTEMS SURVEILLANCE HEQUIREMENTS 4.8.1.1.2 (Continued) 1

4. Verif"ing that on an ESF actuation test signal (without 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 l signal, and 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, ene gizes 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 maintains the steady state voltage and frequency at 41601420 volts and 60 f 1.2 liz.

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 <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />.1)uring 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 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 <br />0.00611 hours <br />3.637566e-5 weeks <br />8.371e-6 months <br /> of this test, the EDG shall be loaded to an indicated 2500 2600 kw*".
7. Verifying that the auto-connected loads to each EDG do not exceed the 2000 hour0.0231 days <br />0.556 hours <br />0.00331 weeks <br />7.61e-4 months <br /> rating of 30(X) kw.
8. Verifying the EDG's capability to:

a) Synchronize with the offsite power source while the EDG is loaded with its emergency loads upon a simulated restoration of offsite power, b) Transfer its loads to the offsite power source, and c) Proceed through its shutdown sequence.

" This test shall be conducted in acc ordance 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.

NORTil ANNA - UNIT 2 3/485 Amendment No.12, "2.1M,

i lil_f:CTI{lCAL POWER SYSTEMS j SURVEILI,ANCE REQUIREMENTS 4.8.1.1.2 (Continued)

9. Verifying that the following EDG lockout features prevent EDG staning l only when required:

a) Remote Local Selection Switch b) Emergency Stop Switch

10. Verifying the EDG's hot restart capability by:

a) Operating the EDG" loaded to an indicated 2500 to 2600 kw*" for 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> or until operating temperatures have stabilized, and b) Within 5 minutes of shutdown verify the EDG can be started ** and l accelerated to at least 900 rpm in less than or equal to 10 seconds. The generator voltage and frequency shall be 4160 420 volts and 60

  • 1.2 llz within 10 seconds after the stan signal,
c. At least once per 10 years or after any snodifications which could affect EDG interdependence by staning" both EDGs simultaneously, during shutdown, and verifying that both EDGs accelerate to at least 900 rpm in less than or equal to 10 seconds.
f. Once per 18 months during any mode of operation, by subjecting each EDG to a preventive maintenance inspection in accordance with maintenance procedures appropriate for diesels used for this class of standby service.

4.8.1.1.3 Each emergency diesel generator 125 volt battery bank and charger shall be demonstrated OPERABLE:

a. At least once per 7 days by verifying that:
1. The parameters in Table 4.8 3 meet Category A limits and
2. The total battery terminal voltage is 2129 volts on a float charge.

" 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 giiidance 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.

NORTil ANNA - UNIT 2 3/48-6 Amendment No. 48, F 1,14, I

El_l!CTIUCAL POWER SYSTEMS SURVEll.I.ANCE 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 no visible corrosion at either terminals or connectors, w the connection resistance of these items is less than 150 x 10 to the minus 6 ohms.
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 cell-to-cell and terminal connections are clean, tight and coated with anti-corrosion material.
3. The resistance of each cell-to-cell and terminal connection is less than or 4

equal to 150 x 10 ohms.

4. The battery charger will supply at least ten amperes r.t 125 volts for at least 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br />,
d. At least once per 60 months, during shutdown, by verifying that the battery capacity is at least 80% of the manufacturer's rating when subjected to a performance discharge test.
c. At least once per 18 months, during 5 hutdown, 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 10% of rated capacity from its average from 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. Inspect each fuel oil storage tank for integrity
4. Clean each fuel oil storage tank NORTil ANNA - UNIT 2 3/4 8-6a Amendment No. 47r48, F 1,112,

_... _ m . . _ _ _ _ . _ . _ _ _____ _ _ _ _ . _ _ .

1 Iable 4.8 2 EMERGENCY DIESEL GENERATOR TEST SCllEDULE - l

' Number of Failures in Number of Failures in I mt 20 Valid Tests

  • Last 100 Valid Tests
  • Test Freauency 7

i -51 $4 Once per 31 days

- 2 2*

  • 25 Once per 7 days i

j 4

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

For the purposes of determining required test frequency, the previous test failure count my be reduced to zero if a complete diesel overhaul to like new conditions is completed,

! , , rovided that the overhaulincluding 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 sedes. 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.

4 1

3 1

NORTH ANNA UNIT 2 -3/489 Amendment No. 43,

ELECTRICAL POWER SYSTEMS l SilDTDOWN LIMITING CONDITION FOR OPERATION 3.8.1.2 As a minimum, one of the following trains of A.C. electrical power sources shall be f OPERABLE .

i

a. One circuit between the offsite transmission network and the onsite Class IE distribution system, and
b. One emergency diesel generator with: l
1. A day tank containing a minimum volume of 450 gallons of fuel;
2. A fuel storage system consisting of two underground storage tanks cach -

containing a minimum volume of 45,000 gallons of fuel (This is a shared system with Unit !), and

3. A fuel transfer system. .

APPLICABILITY:

a. . Modes 5 and 6 ,
b. During movement of irradiated fuel assemblics or loads over irradiated fuel assemblics when no fuel assemblies are in the reactor vessel.

ACTION:  :

a. With less than the above minimum required A.C. electrical power sources OPERABLE, immediately suspend all operations involving CORE ALTERATIONS, positive reactivity changes, movement of irradiated fuel assemblies, and movement ofloads over irradiated fuel assemblies until the minimum required A.C. electrical power sources are restored to OPERABLE status,
b. With one underground fuel oil storage tank of 3.8.1.2.b.2 inoperable for the performance of Surveillance Requirement 4.8 LI.4 or for tank repairs:
l. Verify 45,000 gallons of fuel is available in the operable underground fuel oil storage tank at least once per 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br />,
2. Verify a minimum of 100,000 gallons of fuel oil is maintained in the above ground main fuel oil storage tank at least once per 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br />,
3. Verify an available source of fuel oil and transportation to supply 50,000 gallons of fuel in less than a 48 hour5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br /> period, and
4. Restore the storage tank to OPERABLE status within 7 days or place both Units .

in at least ilOT 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 COLD SilUTDOWN within the following 30 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br />, and perfomi ACTION a. above. .

SURVEILLANCE REQUIREMENTS  !

4.8.1.2 The above required A.C. electrical power sources shall be demonstrated OPERABLE by the perfonnance of each of the Surveillance Requirements of 4.8.1.1.1,4.8.1.1.2,4.8,1,1.3, and 4.8.1.1 A.

NORTil ANNA - UNIT 2 3/4810 Amendment No. AS,70, !!2, !?S, 444-

MPLICABil ITY BASES 3.0.5 This slweification delineates what additional conditions must be satisfied to permit operation to continue, consistent with the ACTION statements for power sources, when a normal or emergency power source is not OPER ABLE. It specincally prohibits operation when one division is inoperable because its normal or emergency po'ver source is inoperable and a system, subsystem, train, component or device in another division is inoperable for another reason.

The provisions of this specincation permit the ACTION statements associated with individual systems, subsystems, trains, components, or devices to be consistent with the ACTION statements of the associated electrical power source. It allows operation to be governed by the time limits of the ACTION statement associated with the Limiting Condition for Operation for the normal or emergency power source, not the individual ACTION statements for each system, subsystem, train, component or device that is determined to be inoperable solely because of the inoperability of its normal or emergency power source.

For example, Specification 3.8.1.1 requires in part that two emergency diesel generators be OPERABLE. The ACTION statement provides for an out-of-service time when one emergency l diesel generator is not OPERABLE. If the definition of OPERABLE were applied without consideration of Specification 3.0.5, all systems, subsystems, trains, components and devices supplied by the inoperable emergency power source would also be inoperable. This would dictate invoking the applicable ACTION statements for each of the applicable Limiting Conditions for Operation. Ilowever, the provisions of Specification 3.0.5 permit the time limits for continued operation to be consistent with the ACTION statement for the inoperable emergency diesel generator instead, provided the other specified conditions -v satis 0ed. In this case, this would mean that the corresponding normal power source must be OPERABLE, and all redundant systems, subsystems, trains, components, and devices must be OPERABLE, or otherwise satisfy Specification 3.0.5 (i.e., be capable of perfonning their design function and have at least one normal or one emergency power source OPERABLE). If they are not satisfied, shutdown is required in accordance with this specification.

As a further example, Specification 3.8.1.1 requires in part that two physically independent circuits between the offsite transmission network and the onsite Class IE distribution system be OPERABLE. The ACTION statement provides a 24-hour out-of service time when both required offsite circuits are not OPERABLE. If the definition of OPERABLE were applied without consideration of Specification 3.0.5, all systems, subsystems, trains, components and devices supplied by the inoperable normal power source, both of the offsite circuits, would also be inoperable This would dictate invoking the applicable ACTION statements for each of the applicable LCOs. Ilowever, the provisions of Specification 3.0.5 permit the time limits for continued operation to be NORTli ANNA - UNIT 2 B 3/4 0-2 Amendment No.

REALTIVITY CONTFILSYSTEMS IIASES

q. i 3/4.1.2 HORATION SYSTEh1S The boron injection system ensures that negative reactivity control is available during each mode of facility operation. The components required to perform this function include 1) borated water sources,2) charging pumps,3) separate flow paths. 4) boric acid transfer pumps,5) associated heat tracing systems, and 6) an emergency power supply from OPERABLE emergency l diesel generators.

With the RCS average temperature above 200'F, a minimum of two loron injection How paths are required to ensure single functional capability in the event an assumed failure renders one of the How paths inoperable. The boration capability of either Dow path is sufficient to provide a SilUTDOWN M ARGIN from expected operation conditions of 1.777c delta k/k after xenon decay and cooldown to 200'F. The maximum expected boration capability requirement occurs at EOL from full power equilibrium xenon conditions and requires 6000 gallons of 12,950 ppm borated water from the boric acid storage tanks or 54,200 gallons of 2300 ppm borated water from the refueling water storage tank.

With the RCS temperature below 200'F, one injection system is acceptable without single failme consideration on the basis of the stable reactivity condition of the reactor and the additional restrictions prohibiting CORE ALTERATIONS and positive reactivity change in the event the single injection system becomes inoperable.

The limitation for a maximum of one charging pump to be OPERABLE and the Surveillance Requirement to verify all charging pumps except the required OPERABLE pump to be inoperable below 270'F provides assurance that a mass addition pressure transient can be relieved by the operation of a single PORV.

llaving more than one charging pump OPERABLE during pump switching operations is allowed. This is acceptable based on pump switching being a momentary action under the direct administrative control of a licensed operator. Rendering a charging pump inoperable for this requirement may be accomplished by methods such as placing the control switch in the pull-to-lock position, tagging of the power supply breaker, or closing of the pump discharge valve. If the pump discharge valve is used to render a pump inoperable during solid water operation, the salve will be deenergized and tagged ir. the closed position.

The boron capability required below 200 F is sufficient to provide a SilUTDOWN M ARGIN of 1.777c delta k/k after zenon decay and cooldown from 200*F to 140'F. This condition requires either 1378 gallons of 12,950 ppm borated water from the boric acid storage tanks or 3400 gallons of 2300 ppm borated water from the refueling water storage tank.

NORTil ANNA - UNIT 2 B 3/4 1 3 Amendment No. 51,'S,149, 470,4 4

- . -- - -.- . - __ . = . _ - . - -

3fB ELECTRICAL POWER SYSTEMS BASES 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 pow er will be availa' le to supply the safety related equipment required for 1) thu 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.C. 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 quantitles to maintain adequate day tek level to suppon full load operation of the EDO.

The ACTION requirements specified for the levels of degradation of the power sources provide restriction upon continued facility operation commensurate with the leve' 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 of each of the onsite 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 onsite A.C. source.

Entering the 14 day EDG action statement during poweroperation has been shown to result in a smallincrease in the core damage frequency, providing the Alternate A.C. diesel generator

( A AC 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 actions statement is inoperable or becomes inoperable during the founeen day action statement of the effected EDG, a 72 hour8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> action statement is entered. If the three diesel generators (i.e., AAC DG or opposite unit's EDGs) required to support entry into the fourteen day action statement are restored to OPERABLE status within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br />, the remainder of the 14 day action statement can be used. Restoring the affected EDG to service removes the conditional OPERABILITY requirements for the AAC DG and opposite unit's EDGs.

The operability requirements for the AAC DG are specified in the Technical Requirements Manual. In addition, to be considered OPERABLE to support the founeen day action statement the AAC IX) 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 NORTil ANNA IJNIT 2 B 3/4 8 1 Amendment No. 48, F 1,133.-434

l 3/18 El ECTRICAL POWER SYSTEh1S IIASES during the 14 day action statement, the OPERABil.lTY of the remaining EDGs does not need to be demonstrated since the AAC DG was designed and purchased according to specifications which adequately ensnie that conunon cause failure in not likely.

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

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

Implem~itation of the ACTION requisenients shall not preclude completion of actions to establish a safe conservativc plant condition. Completion of the requirements will prevent the occurrence of postulated events for which mitigating actions would be required.

The OPERABILITY af the minimum specified A.C. and D.C. power sources and rowiated distribution spems during shutdown and refueling ensures that 1) the facility can be maintainco in the shutdow n or re.Pueling condition for extended time periods,2) sufficient instramentem9 &mtro1 capability is available for monitoring and maintaining the unit status, and 3) sufficient paae h available for systems nece=sary to recover from postulated events in these hiODES, e g., a f uci handling accident.

The Suncillance Requirements for demonstrating the OPERABILITY of the Emergency Diesel Generators ate in accordance with the recommendations of Regulatory Guide 1.9 " Selection of Diesel Generator Set Capacity for Standby Power Supplies," March 10,1971,and1.108

"?crie9it 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, 1986.

The Surveillance Requirements for demonstrating the OPERABILITY of the Emergency Diesel Generator batteries and the Station batteries me based on the recommendations of Regulatory Guide 1.129 " Maintenance, Testing and Replacement of Large Lead Storage Batteries for Nuclear Power Hants " February 1978, and iEEE Std 450-1980,"lEEE Recommended Practice for Maintenance, Testing, and Replacement of Large Lead Storage Batteries for Generating Stations and Substations," r,s modified by Amendment No. 84 issued March 25,1988.

Containment electrical penetration 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 breakers during period surveillance.

NORTil ANNA - UNIT 2 B 3/4 8-2 Amendment No. IMr134 l

3/18 I:f FCTRICAL POWIIR SYSTENiS BASCS The surveillance frequency applicable to molded case circuit breakers and/or buses provides assurance of breaker and/or fuse reliability by testing at least one representative sample of each manufaciurer's brand of circuit breaker and/or fuse. Each manufacturer's molded 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 molded case circuit breakers and/or fuses,las necessary to divide that manufacturer's breakers and/or fuses into groups and treat each group as a separate type of breaker or fuse for surveillance purposes.

The OPERAHILITY of the motor operated valves thermal and overload protection and/or bypass devices ensures that these devices will not prevent safety related valv's 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.

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

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