Text

Amends 203 & 184 to Licenses NPF-4 & NPF-7,respectively,re Proposed Changes to EDG Day Tank Fuel Oil Volume
	ML20133Q053
Person / Time
Site:	North Anna
Issue date:	01/17/1997
From:	Reinhart M; NRC (Affiliation Not Assigned)
To:	;
Shared Package
ML20133Q056	List: ML20133Q053; ML20133Q066;
References
	NUDOCS 9701270208
	Download: ML20133Q053 (16)
	v • d • e

1 M E:oq d'

~

k UNITED STATE 3 NUCLEAR REGULATORY COMMISSION 1

E WASHINGTON, D.C. sose64m1

%...../

VIRGINIA ELECTRIC AND POWER COMPANY OLD DOMINION ELECTRIC COOPERATIVE DOCKET NO. 50-338 NORTH ANNA POWER STATION. UNIT NO. 1 AMENDMENT TO FACILITY OPERATING LICENSE Amendment No. 203 License No. NPF-4 1.

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

A.

The application for amendment by Virginia Electric and Power Company et al., (the licensee) dated January 31, 1996, as supplemented by letter dated November 26, 1996, complies with the standards and requirements of the Atomic Energy Act of 1954, as amended (the Act),

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

The facility will operate in conformity with the application, the provisions of the Act, and the rules and regulations of the Comission; l

C.

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

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

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

9701270208 970117 DR ADOCK 0500 8

.. 2.

Accordingly, the license is amended by changes to the Technical Speci-fications as indicated in the attachment to this license amendment, and paragraph 2.D.(2) of facility Operating License No. NPF-4 is hereby amended to read as follows:

(2) Technical Snecifications The Technical Specifications contained in Appendices A and B, as revised through Amendment No. 203, are hereby incorporated in the.

license. Tha licensee shall operate the facility in accordance with the Technical Specifications.

3.

This license amendment is effective as of its date of issuance and shall be implemented within 30 days.

FOR TH NUCLEAR 4EGULA ORY COMMISSION

/h 4/

Mark Reinhart, Acting Director Project Directorate 11-1 Division of Reactor Projects - I/II y

Office of Nuclear Reactor Regulation Attachment.

Changes to the Technical Specifications Date of Issuance:

January 17, 1997 4

h

s.

ATTACHMENT TO LICENSE AMENDMENT NO. 203 TO FACILITY OPERATING LICENSE NO. NPF-4 DOCKET NO. 50-338 Replace the following pages of the Appendix "A" Technical Specifications with the enclosed pages as indicated. The revised pages are identified by amendment number and contain vertical lines indicating the area of change.

The corresponding overleaf pages are also provided to maintain document completeness.

R - ve Pauer Insert Paces 3/4 8-1 3/4 8-1 3/4 8-5 3/4 8-5 B 3/4 8-1 B 3/4 8-1 B 3/4 8-2

)

Yp 3bLg ELECTRICAL POWER SYSTEMS 3/4.8.1 A.C. SOURCM l

j OPERATING 1

LIMITING CONDITION FOR OPERATION I

t i

3.8.1.1 As a minimum, the following A.C. electrical power sources shall be OPERABLE:

i j

Two physically independent circuits between the offsite transmission network and a.

the onsite Class IE distribution system, and i

[

b.

Two separate and independent diesel generators:

t l

1. Each with a separate day tank containing a minimum of 450 gallons of fuel, and l

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 2), and l

3. A separate fuel transfer system.

I APPLICABII ITY:

MODES 1,2,3 and 4.

t j

ACTION:

l With one offsite circuit of 3.8.1.1.a inoperable, demonstrate the OPERABILITY a.

i l

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 0.00222 hours 1.322751e-5 weeks 3.044e-6 months thereafter. Restore the offsite circuit to j

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

I b.

With one diesel generator of 3.8.1.1.b inoperable, demonstrate the OPERABILITY of the A.C. offsite power sources by performing Surveillance Requirement q

4.8.1.1.1.a within I hour and at least once per 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months thereafter. If the EDG became inoperable due to any cause other than an inoperable support system, an

}

independer.ily testable component, or preplanned prr'.entative maintenance or testing, demonstrate the OPERABILITY of the remaining OPERABLE EDG by l

performing Surveillance Requirement 4.8.1.1.2.a.4 within 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months *, unless the 1

absence of any potential common mode failure for the remaining diesel generator i

is demonstrated. Restore the diesel generator to OPERABLE status within 72 hours8.333333e-4 days 0.02 hours 1.190476e-4 weeks 2.7396e-5 months or be in at least HOT STANDBY within the next 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months and in COLD f

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

i

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

]

restored to OPERABILITY.

i NORTH ANNA - UNIT 1 3/48-1 Amendment No. S3,128, !Si, 203 r

ELECTRICAL POWER SYSTEMS SHUTDOWN LIMITING CONDITION FOR OPERATION-i-

3.8.1.2 '

As a minimum, one of the following trains of A.C. electrical power sources shall be l

OPERABLE:

t l

a.

One circuit between the offsite transmission network and the onsite Class IE I

distribution system, and b.

One diesel generator with:

I

1. A day tank containing a minimum volume of 450 gallons of fuel; l

3

2. A fuel storage system consisting of two underground storage tanks each containing a minimum volume of 45,000 gallons of fuel (This is a shared j

system with Unit 2), and

)

3. A fuel transfer system.

APPLICABILITY:

i l

a.-

Modes 5 and 6 b.

During movement of irradiated fuel assemblies or loads over irradiated fuel assemblies when no fuel assemblies are in the reactor vessel.

l ACTION:

i-l j

a.

With less than the above minimum required A.C. electrical power sources OPERABLE, immediately suspend all operations involving CORE l

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 restored to OPERABLE j

status.

1 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 j

storage tank at least once per 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months , l

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 0.00333 hours 1.984127e-5 weeks 4.566e-6 months , 4

j

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 0.0133 hours 7.936508e-5 weeks 1.8264e-5 months period, and

4. Restore the storage tar.k to OPERABLE status within 7 days or place both Units I

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 COLD SHUTDOWN within the following 30 hours3.472222e-4 days 0.00833 hours 4.960317e-5 weeks 1.1415e-5 months , and perform ACTION a. above.

SURVEILLANCE REQUIREMENTS i

4.8.1.2 The above required A.C. electrical power sources shall be demonstrated OPERABLE by the performance of each of the Surveillance Requirements of 4.8.1.1.1,4.8.1.1.2,4.8.1.1.3, and 4.8.1.1.4.

1 l

NORTH ANNA - UNIT 1 3/48-5 Amendment No. ! !, S3,128, !55, 203 i

i g8 4'

ELECTRICAL POWER SYSTEMS 3/4.8.2 ONSITE POWER DISTRIBUTION SYSTEMS A.C. DISTRIBUTION - OPERATING 5

i LIMITING CONDITION FOR OPERATION j

3.8.2.1 The following A.C. electrical busses shall be OPERABLE and energized with tie breakers open between redundant busses:

1 a.

H A.C. Emergency Busses consisting of:

i

1. 4160 voit Emergency Bus # 1H

2. 480 volt Emergency Busses # 1H,1H1

)

b.

J A.C. Emergency Busses consisting of:

1. 4160 volt Emergency Bus # 1J i

2. 480 volt Emergency Busses # 1J,1J1 c.

120 volt A.C. Vital Bus # 1 1 energized from its associated inverter connected to D.C. Bus # 1-l*

4 i

d.

120 volt A.C. Vnal Bus # 1-11 energized from its associated i

inverter conrected to D.C. Bus # 111*

4 e.

120 volt A.C. Vital Bus # 1 Ill energized from its associated i

inverter connaded to D.C. Bus # 1 11l*

i f.

120 voit A.C. Vital Bus # 1 IV energ' zed from its associated j

inverter connected to D.C. Bus # 1 IV*

j APPLIC ABfUTY: MODES 1,2,3, and 4.

j AQ.T.QBI a.

With one of the required A.C. Emergency busses not fully energized, re energize within 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-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 .

b.

With one A.C. Vital Bus not energized, re energize the A.C. Vital Bus within 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months or be in at least HOT STANDBY within the next 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months and in COLD SHUTDOWN within the following 30 hours3.472222e-4 days 0.00833 hours 4.960317e-5 weeks 1.1415e-5 months .

j c.

With one A.C. Vital Bus either not energized from its associated inverter, or with the inverter not connected to its associated D.C. Bus, re-energize the A.C. Vital Bus frem its

)

associated inverter connected to its associated D.C. Bus 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 and in COLD SHUTDOWN within the following 30

hours, t

'Two inverters may be disconnected from their D.C. Busses for up to 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months as necessary, for the purpose of performing an equalizing charge on their associated battery banks provided (1) their vital busses are energized, and (2) the remaining vital busses are energized from their associated inverters and connected to their associated D.C. Busses.

1 i

i i

j NORTH ANNA UNIT 1 3/4 8 6 Amendment No.

155 1

1

l i

3/18 ELECTRICAL POWER SYSTEMS

~

BASES 3/4.8.1 mad 3/4.8.2 A.C. and D.C. POWER SOURN 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 -

l 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.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 transfernng fuel oil to the associated EDG day tank in sufficient quantities to maintain adequate day tank level j

to support full load operation of the EDG.

]

l The ACTION requirements specified for the levels of degradation of the power sources j

provide restriction upon continued facility operation commensurate with the level of degradation.

j The OPERABILITY of the power sources are consistent with the initial condition assumptions of l

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 i

l coincident with an assumed loss of offsite. power and single failure of the other onsite A.C. source.

j 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).

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

a safe conservative plant condition. Completion of the requirements will prevent the occurrence p_

of postulated events for whhh mitigating actions would be required.

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

j 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., the control room emergency ventilation system fans during a fuel handling accident.

l The Surveillance Requirements for demonstrating the OPERABILITY of the diesel

{

generators are in accordance with the recommendations of Regulatory Guide 1.9 " Selection of l

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 August 22,1986, i

t NORTH ANNA - UNIT 1 B 3/4 8-1 Amendment No. 83,97,156,198, 203 l

i 3

3L4J FLFrTRICAL POWER SYSTEMS BASES 3/4.8.1 and 3/4.8.2 A.C. and D.C. POWER SOURN AND DISTRIBUTION (Continued)

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 Replacement ofImge 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. 97 issued March 25,1988.

l l

i i

4 l

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

@ tn:vy

/

y-t UNITED STATES

,j NUCLEAR REGULATORY COMMISSION j

WASHINGTON, D.C. 2006H001 sl 3

VIRGINIA ELECTRIC AND POWER COMPANY OLD DOMINION ELECTRIC COOPERATIVE DOCKET NO. 50-339 4

NORTH ANNA POWER STATION. UNIT NO. 2 AMENDMENT TO FACILITY OPERATING LICENSE Amendment No.184 License No. HPF-7 1

1.

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

A.

The application for amendment by Virginia Electric and Power Company et al., (the licensee) aated January 31, 1996, as supplemented by letter dated November 26, 1996, complies with the standards and requirements of the Atomic Energy Act of 1954, as amended (the Act),

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

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

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

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

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

1 d

f

c

- 2.

Accordingly, the license is amended by changes to the Technical Speci-fications as indicated in the attachment to this license amendment, and paragraph 2.C.(2) of Facility Operating License No. NPF-7 is hereby amended to read as follows:

(2) Technical Soecifications The Technical Specifications contained in Appendices A and B, as revised through Amendment No. 184, are hereby incorporated in the license. The licensee shall operate the facility in accordance with the Technical Specifications.

3.

This license amendment is effective as of its date of issuance and shall be implemented within 30 days.

FORTHJMUCLEARR ULATORY COMMISSION A/ 4e ark Rei6 hart, Acting Director

'l Project Directorate 11-1 Division of Re' actor Projects - I/II Office of Nuclear Reactor Regulation

Attachment:

Changes to the Technical Specifications Date of Issuance:

January 17, 1997 i

i

i ATTACHMENT TO LICENSE AMENDMENT NO.184 TO FACILITY OPERATING LICENSE NO. NPF-7 DOCKET NO. 50-339 Replace the following pages of the Appendix "A" Technical Specifications with the enclosed pages as indicated. The revised pages are identified by amendment number and contain vertical lines indicating the area of change.

The corresponding overleaf pages are also provided to maintain document completeness.

j Remove Pages Insert Paaes 3/4 8-1 3/4 8-1 3/4 8-10 3/4 8-10 B 3/4 8-1 B 3/4 8-1 B 3/4 8-2 B 3/4 8-2 t

N 4

l i

4 1

J

3L4J F1 FCTRICAL POWER SYSTEMS I

3/4.8.1 A.C. SOURCES OPERATING j

LIMITING CONDITION FOR OPERATION i.

[

3.8.1.1 As a minimum, the following A.C. electrical power sources shall be OPERABLE:

i a.

Two physically independent circuits between the offsite transmission network and I

the onsite Class IE distribution system, and b.

Two separate and independent diesel generators:

l

1. Each with a separate day tank containing a minimum of 450 gallons of fuel, and l

{

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.

f APPLICABII ITY:

MODES 1,2,3 and 4.

ACTION:

a.

With one offsite circuit of 3.8.1.1.a inoperable, demonstrate the OPERABILITY of 3

the remaining A.C. sources by performing Surveillance Requirement 4.8.1.1.1.a j

within I hour and at least once per 8 hours9.259259e-5 days 0.00222 hours 1.322751e-5 weeks 3.044e-6 months thereafter. Restore the offsite circuit to OPERABLE status within 72 hours8.333333e-4 days 0.02 hours 1.190476e-4 weeks 2.7396e-5 months or be in at least HOT STANDBY within the next 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months and COLD SHUTDOWN within the following 30 hours3.472222e-4 days 0.00833 hours 4.960317e-5 weeks 1.1415e-5 months .

l b.

With one diesel generator of 3.8.1.1.b inoperable, demonstrate the OPERABILITY of the A.C. offsite 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 0.00222 hours 1.322751e-5 weeks 3.044e-6 months thereafter. If the EDG j

became inoperable due to any cause other than an inoperable support system, an j

independently testable component, or preplanned preventative maintenance or j

testing, demonstrate the OPERABILITY of the remaining OPERABLE EDG by i

perfonning Surveillance Requirement 4.8.1.1.2.a.4 within 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months *, unless the l

absence of any potential common mode failure for the remaining diesel generator j

is demonstrated. Restore the diesel generator to OPERABLE status within 72 hours8.333333e-4 days 0.02 hours 1.190476e-4 weeks 2.7396e-5 months j

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 .

o

)

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

l NORTH ANNA - UNIT 2 3/48-1 Amendment No.18, !!2,165,184 i

l

-!W e-e

i TABLE 4.8-2 DIESEL GENERATOR TEST SCHEDULE Number of Failures Number of Failures in in Last 100 Valid Last 20 Valid Tests

Tests

Test Frequency

<1

<4 Once per 31 days 1.2**

3.5 Once per 7 days 4

I

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

1 For the purposes of determining the required test frequency, the previous test failure count may be reduced to zero if a complete diesel overhaul to like-new conditions is completed, provided that the overhaul including 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 4.8.1.1.2.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.

l NORTH ANNA - UNIT 2 3/4 8-9 Amendment No. 48

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(

ELECTRICAL POWER SYSTEMS SHUTDOWN 4

- 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 IE

[

distribution system, and

)

j b.

One diesel generator with:

i

1. A day tank containing a minimum volume of 450 gallons of fuel; l

2. A fuel storage system consisting of two underground storage tanks each

)

]

containing a minimum volume of 45,000 gallons of fuel (This is a shared system with Unit 1), and

3. A fuel transfer system.

]

APPLICABILITY:

a.

Modes 5 and 6 i

\\

b.

During movement of irradiated fuel assemblies 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 j

assemblies, and movement of loads over irradiated fuel assemblies until the j

minimum required A.C. electrichl power sources are restored to OPERABLE j

status.

l 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:

l

1. Verify 45,000 gallons of fuel is available in the operable underground fuel oil j

storage tank at least once per 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months , l

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 0.00333 hours 1.984127e-5 weeks 4.566e-6 months , j

3. Verify an available source of fuel oil and transponation to supply 50,000 gdlons of fuel in less than a 48 hour5.555556e-4 days 0.0133 hours 7.936508e-5 weeks 1.8264e-5 months period, and

4. Restore the storage tank to OPERABLE status within 7 days or place both Units 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 COLD SHUTDOWN within the following 30 hours3.472222e-4 days 0.00833 hours 4.960317e-5 weeks 1.1415e-5 months , and perform ACTION a. above.

i SURVEILLANCE REQUIREMENTS 4.8.1.2 The above required A.C. electrical power sources shall be demonstrated OPERABLE by the performance of each of the Surveillance Requirements of 4.8.1.1.1,4.8.1.1.2,4.8.1.1.3, and 4.8.1.1.4.

NORTH ANNA - UNIT 2 3/4 8-10 Anandment No. 48,70, l ' 2,138,184 i

' 3/18 FI FCTRICAL 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 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.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 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 1

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.

The ACTION requirements specified in Modes 5 and 6 address the coadition 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 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) sufficient power is available for systems necessary to recover from postulated events in these MODES, e.g., the control room emergency ventilation system fans 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. 48 issued August 22,1986.

NORTH ANNA - UNIT 2 B 3/4 81 Amendment No. 48, Si,138, ? ?9,184

3/_4Ji ELECTRICAL POWER SYSTEMS BASES 3/4.8.1 = d 3/4.8.2 A.C. and D.C. POWER SOURCES AND DISTRIBUTION (Continued)

'Ihe Surveillance Requirements for demonstrating the OPERABILITY of the Emergency j

Diesel Generator batteries and the Station batteries are based on the recommendations of Regulatory Guide 1.129, " Maintenance, Testing and Replacement of Large Lead Storage Batteriesfor Nuclear Power Plants," Febmary 1978, and IEEE Std 450-1980, "IEEE l

Recommended Practice for Maintenance, Testing and Replacement of Large Lead Storage

]

Batteries for Generating Stations and Substations," as modified by Amendment No. 84 issued j

March 25,1988.-

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

l 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 2

of each manufacturer'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 i

manufacturer's brand of molded case circuit breakers and/or fuses, it is necessary to divide that l

manufacturer's breakers and/or fuses into groups and treat each group as a separate type of breaker 4

or fuse for surveillance purposes.

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The OPERABILITY of the motor-operated valves thermal and overload protection and/or 4

l bypss devices ensures that these devices will not prevent safety-related valves from performing j

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 l

Motors on Motor-Operated Valves," Revision 1, March 1977.

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NORTH ANNA - UNIT 2 B 3/4 8-2 Amendment No. 448,184

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