ML20095D807
| ML20095D807 | |
| Person / Time | |
|---|---|
| Site: | North Anna  |
| Issue date: | 04/21/1992 |
| From: | Berkow H Office of Nuclear Reactor Regulation |
| To: | |
| Shared Package | |
| ML20095D808 | List: |
| References | |
| NUDOCS 9204270222 | |
| Download: ML20095D807 (19) | |
Text
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UNITED STATES y
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.i NUCLEAR REGULATORY COMMISSION 8
WASHINGTON. o C. 20 5156 o
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VIRGINIA ELECTRIC AND POWER COMPANY OLD DOMINION ELECTRIC COOPERATIVE DOCKET NO. 50-338 NORTH ANNA POWER STATION. UNIT NO. 1 AMENDMEf4T TO FACILITY OPERATING LICENSE Amendment No. 156 License No. HPF-4 1.
The Nuclear Regulatory Cos,,sion (the Comission) has found that:
A.
The application for amendment by Virginia Electric and Power Company et al., (the licensee) dated April 16, 1991, 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; C.
There is reasonable assurance (i) that the activities authorized by this amendment can be conducted without endangering the health and safe +.y 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 comon defense and security or to the health and safety of the public; and E.
The issuance of this amendnent is in accordance with 10 CFR Part 51 of the Cormission's regulations and all applicable requirements have been satisfied.
9204270222 920421 PDR ADOCK 05000330 P
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. 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 Specifications The Technical _ Specifications contained in Appendices A and B, as revised through Amendment No.156, 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 the date of issuance and shall be implemented in 60 days.
FOR THE NUCLEAR REGULATORYiCOMMISSION
/S t['
Herbert N. Berkow, Director Project Directorate 11-2 Division.of Reactor projects - 1/11 Office of Nuclear Reactor Regulation
Attachment:
Changes to the Technical Specifications Date of Issuance:
April 21,1992 L
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j ATTACHMENT TO LICENSE AMENDMENT NO.156 TO FACILITY OPERATING llCENSE NO. HPF-4 DOCKET NO. 50-338 Replace the following pages of the Appendix "A" Techrical Specifications with the enciesed pages as indicated. The revised pages are identified by amendment nutter and contain vertical lines indicating the area of change.
The corresponding overleaf pages are also provided to maintain document completeness.
8-5 3/4 8-7 3/4 8-7a (new) 3/4 8-8*
B 3/4 8-1 7
- There are no changes to this page.
It is provided to maintain dc(.ument completeness.
ELECTRICAL POWER SYSTEMS.
4 SHUTDOWN LIM 111NG CONDITION FOR OPERATION 3.8.1.2 As a minimum, one of the following trair.s 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 b.
One diesel generator with-1.
A day tank containing a minimum volume of 750 gallons of fuel; 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 2), and 3.
A f uel transfer system.
APPLICABILIZ:
- a. Modes 5 and 6
- b. During n.ovement of irradiated fuel assemblies or loads over irra-diated 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, positivr reactivity e
changes, movement of irradiated fuel assemblies, and movement of loaos 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 4.8.1.1.4 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 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 CCLD 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.
SURVEILLANCE REQUIREMENTS i
4.8.1.2 The above required A.C. electrical power sources shall be demonstrated j
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 1 3/4 8-5 Amendment No. II,83,128,156 1
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ELECTRIC A,L POWER SYSTEMS 3 4 8 2 ONSITE POWER DISTR!BUTION SYSTEMS A C DISTpl9UTION OPERAT!NG LjgTg10NDITtON FOR OPERAHON 3 8 2.1 The following A C elecincal busses shan be OPERABLE and energized with tie breakers open between redundant busses:
a H A C Emergency Busses consisting of:
- 1. 4160 von Emergency Bus # 1H
- 2. 480 von Emergency Busses # 1H,1H1 b
J A C. Emergency Busses consisting of:
1 4160 von Emergency Bus # 1J
- 2. 480 voR Emergency Busses # 1J.1J1 c.
120 volt A C. Vital Bus # 1 I energized from its associated invener connected to D.C. Bus # 1-i*
d 120 von A C. %tal Bes # 1-Il energized from as associated inverter connected to D C Bus # 1 It' e.
120 von A C. Vital Bus # 1 til energized from its associated
.invener connected to O C Bus # 1 111' f.
120 von A C. Vital Bus # 1 IV energized from its associated invener connected to D C Bus # 1 IV' jL DLLC ABILITV MODES 1,2. 3, and 4 ACTION a
With one of the required A C Emergency btaes not funy energized, re energize within 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> or be in at least HOT STANDBY within the nex16 hours and in COLD SHUTDOWN within the tonowing 30 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br /> b
With one A C %tal Bus not energ zee. re energize the A C %tal Bus 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 ST ANDBY within the ned 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 />.
c.
With one A C. Vital Bus either not energized from its associated invener, or with the invener not connected to its associatea D C Bus, re energize the A C. %tal Bus from its associated invener connecteo to its assocated D C Bus 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 withen 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 folkunng 30 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br />.
'Two inver1ers may be cisconnected from their D C Busses for up to 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> as necessary, for the purpose of performing an equalizing charge on their associated battery baris provided (1) their vital busses are energized, and (2) the remaining vital cussas are energized from their associated inve:ters and connected to ineir asscdated D.C. Busses.
/cendment No.155, NORTH ANNA - UNIT 1 3'48-6
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ELECTRIC AL POWER SYSTEMS
.A C and D C DISTRIBUTION - SHUTDOWN l
t.iMITINGJOgDITION FOR OPERATION,
3.8.2 2 As a minirnum. one of the following trains of A C and D C busses shallbe OPERABLE and energized in ine specified manner:
a.
'H" Train (Orance) consisting of the following:
1.
4160 vott Emergency Bus 1H 2.
480 volt Emergency Busses 1H arxl 1H1 3.
120-vcit A C, Vital Bus 1 1 energized from as associated inverter connected to D C bus 1 1, and d..
120 volt A.C. Vital Bus 12 energized from its associated inverter connected to D C bus 1 2.
5.
125-volt D.C. Busses No.1 1 & 12, and 6
125-volt D C. Battery Banks 1-1 & 1 11 and Chargers 11 &1110 C. Battery Charger 1C 1 may be used in place of either of the above Chargers.
b.
'J' Train (Purple) consitting of the following:
1.
4160-volt Emergency Bus 1J i
2.
480 volt Emergency Busses 1J and 1J1 3.
120 volt A.C. Vital Bus 13 energized f rom its associated inverter connected to D C. bus 13, and 4.
120 volt A.C, Vital Bus 14 energized from its associated inverter connected to D.C. Dus 1-4 l
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5.
125-volt D C. Busses No.1-3 & 1-4, and l
6.
125-volt D.C. Battery Banks 1 111 & 1 IV and Chargers 1 111 & 1 IV D.C. Battery Charger 1C-11 l
may be used in place of either of the atzve Chargers, l
APPLICABILITY:
a.
Modes 5 and 6 1-b.
During movement of irradiated fuel assemblies or loads over irradiated fuel assemblies when no fuel assemblies are in the reactor vessel l-t l-
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NORTH ANNA-UNIT 1 3/4 8 7 Amendment No.156 l
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E1D Wdh the above required train of A C. and 0 C. electncal equipment ard busses rot fully OPERABLE. immedetety suspend all operatons involving CORE ALTERATIONS, posdivt reactrvity changes, rnovement of irradiated fuel assemblie:;, and movement of loads over inadiated fuel asserrelies. Initiate conectise acton to restore the required train of A C. and D.C. electncal equipment and busses to OPERABLE status as soon as possatde.
SURVEILLANC_E R_EOUIREMENTS 17T 4.8.2.2 1 The specified busses shall be detemined energized in the required manner once per 7 days by veritying correct breaker alignment and indicated voltage on the busses.
4 8.2.2 2 The above required 125-volt battery bank and chargers shall be dernonstrated OPERAlk.E per Sun /eillance Requirement 4 8.2.3 2.
NORTH ANNA-UN:T 1 3/4 8-7a Amendment Na.155
ELECTRICAL POWER SYSTEMS D.C. DISTRIBUTION - OPERATING LIMITING CONDITION FOR OPEP.ATION 3.8.2.3 The following D.C. bus trains shall be energized and OPERABLE with tie breakers between bus trains open:
TRAIN "A" consisting of 125-volt D.C. bus No.1-1 and 1-II,125-volt D.C. battery bank No.1-1 and 1-11 and a full capacity charger.
TD.AIN "B" consisting of 125-volt D.C. bus No.1-111 and 1-IV,125-volt D.C. battery bank No. 1-111 and 1-IV and a full capacity c ha rger.
APPLICABILITY: MODES 1, 2, 3 and 4 ACTION:
a.
With one 123-volt D.C. bus inoperable, restore the inoperable bus 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 tne 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 />, b.
With one 125-volt D.C. battery and/or its crarger inoperable, restore the inoperable battery and/or charger 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 SHUTDCWN within the following 30 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br />.
SURVEILLANCEREQUIREMENTS 4.8.2.3.1 Each D.C. bus train shall be determined OPERABLE and energized with tie breakers open at least once per 7 days by verifying correct breaker alignment and indicated power availability.
4.8.2.3.2 Each 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 greater than or equal to 129 volts on float charge.
NORTH ANNA - UNIT 1 3/4 8-8 Anendment Mc. 97 l
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3/4.8 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 for 1) the safe shutdown of the f acility 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.
The ACTION requirements specified for the levels of degradation of the power sources provide restriction upon continued facility operation comensurate with the level of degradation. The OPEPABILITY 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 distribu-tion systems OPERABLE during accident conditions coincident with an assumed loss of offsite pow'r and single failure of the other onsite A.C. source.
The ACTION requirements specified in Modes 5 and 6 address the condition where sufficient power is unavailable to recover from postulated events (i.e., fuel handling accident).
Implementation of the ACTION requirements shall not preclude completion of actions to establish a safe conservative plant condition.
Completion of the requirements will prevent the 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 ocnitoring and maintaining the unit status, and 3) sufficient power is available for systems necessary to recover from postulated events in these MODES, e.g.,
a fuel handling accident.
The Surveillance Requireuents for demonstrating the OPERABILITY of the diesel generators are in accordance with the recomendations of Regulatory Guide 1.9
" Selection of Diesel Generator Set Capacity for Standby Power Supplies," March 10, 1971, and 1.108 " Periodic Testing of Diesel Generator Units Used as Onsite Electric Power Systems at Nuclear Power Plants" Revision 1, August 1977, as modified by Amendment No. 83 issued August 22, 1986.
The Surveillance Requirements for demonstrating the OPERABILITY of the Einergency Diesel Generator batteries and the Station batteries are based on the recomendations of Regulatory Guide 1.129. " Maintenance, Testing and Replacement of Large lead Storage Batteries for Nuclear Power Plants," February 1978, and IEEE Std. 450-1980, "lEEE Recomended Practice for Naintenance, Testing and Replacement of Large Lead Storage Batteries for Generating Stations tnd Substations," as modified by Amendment No. 97 issued March 25, 1988.
NORTH ANNA - UNIT 1 B 3/4 8-1 Amendment No. 37,97,156
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UNITED STATES 8
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NUCLEAR REGULATORY COMMISSION WASHINGTON, D C. 2tE66 o,
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VIRGIN 1 A ELECTRIC AND POWER COMPANY OLD DOMINION ELECTRIC COOPERATIVE DOCKET NO. 50-339 NORTH ANNA POWER STATION, UNIT NO. 2 AMENDMENT TO r AC11.1TY OPERATING t ICEhsE Amendment No. 138 License No. NPF-7 1.
The Nuclear Regu',atory Comission (the Comission) has found that:
A.
The application for amendment by Virginia Electric and Power Company, et al., (the licensee) dated April 16, 1991, complies with the stcndards 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; 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 Comission's regulations; D.
The issuance of this amendment will not be inimical to the comon defense and security or to the health and safety of the public; and E.
The issuance of this amendment is in accordance with 10 CFR Part 51 of the Comission's regulations and all applicable requirements have been satisfied.
- _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 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) gebnicalSpecifications The Technical Specifications contained in Appendices A and B, as revised through Amendment No.138 are hereby incorporated in the license. The licensee shall operate the facility in accordance with the Technical Specifications.
3.
This license amendment is ef fective w. sf the date of issuance and shall be implemented in 60 days.
FOR THE NUCLEAR REGULATORY COMMISSION s
H r ert N. Berkow, Director Project Directorate 11-2 Division of Reactor Projects - 1/11 Office of Nuclear Reactor Regulation
Attachment:
Changes to the Technical Specifications Date of Issuance:. April 21,1992
ATTACHMENT TO LICENSE AMEN 0 MENT NO. 138 L0FAClllTYOPERATINGLICENSENO.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 lin.*s indicating the area of change.
The corresponding overleaf pages are also provided to inaintain document completeness.
Pace TiTB-10 3/4 8-12 3/4 8-12a 8 3/4 8-1 B 3/4 8-2
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 frequenty 11 14 Once per 31 days
>2**
>5 Once per 7 days
- Criteria for determining number of failures and number of valid tests shall be in accordance with Regulatory position C.2.e of Regulatory Guide 1.108, but determined on a per diesel generator basis.
I 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.
NORTH ANNA - UNIT 2 3/4 8-9 Amendment No. 48
ELECTRICALPOWERSYSTEMS SHUT 00WN 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 b.
One diesel generator with:
1.
A day tank containing a minimum volume of 750 gallons of fuel; 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
- b. During movement of irradiated fuel assemblies or loads over irra-diated 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 assemblies, and movement of loads 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 4.8.1.1.4 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 ;uel 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 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 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.
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 Amendment No. #8,70,112,138
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4 ELECTRICAL POWER SYSTEMS
-3/4.8.2 ONS TE POWER DISTRIBUTION SYSTEMS A.C. DISTRIBUTION - OPERATING
-LIMITING CONDli10N FOR OPERATION 3.8.2.1 The following A.C. electrical busses shall be OPERABLE and energized with tie breakers open between redundant busses:
4160 volt Emergency Bus # 2H 4160 voit Emergency Bus # 2J 480 volt Emergency Bus # 2H, 2H1 s
480 volt Emergency Bus # 2J, 2J1 120 volt A.C Vital Bus # 2-1 120 volt A.C. Vital Bus # 2-II 120 volt A.C. Vital Bus # 2-III 120 volt-A,C. Vital Bus # 2-IV
- APPLICABILITY:
H0 DES 1, 2, 3 and 4.
ACTION:
. With less than the above complement of A.C. busses 0PERABLE, ~ restore the finoperable bus to OPERABLE status within 0 hours0 days <br />0 hours <br />0 weeks <br />0 months <br /> or be in at.least NOT. 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 />.
SURVEILLANCE REQUIREMENTS
' 4.8.2.1 ;The specified A.C. busses shall-be determined OPERABLE with tie breakers open between redundant busses at least once per 7 days by verifying correct breaker alignment and indicated power-availability.
. NORTH ANNA - UNIT 2 3/4 8-11
ELECTRICAL POWER SYSTEMS AC and 0 C DISTRIBUTION - SHtJTDOWN 1
l L. IMITING CONDITION FOR OPERATION
. =
3822 As a minimum, one of the following trains of A C and D C busses shall be OPER ABLE and energized in the specified manner:
a.
'H Train (Orange) consisting of the followirg 1.
4160 von Emergency Bus 2H 2,
480 vor: Emergency Busses 2H and 2H1 3.
120 volt A C. Vital Bus 21 energized from as assauted invener connected to O C bus 21, and 4.
120 volt A C. Vital Bus 2 2 energized from as assoc:ated inverter connected to D C. tus 2 2.
5.
125-vott O C. Busses No 218 2 2, and 6.
125 von D C Battery Banks 21 & 211 and Chargers 21 & 211 D C Battery Charger 2C-l may be used in place of erther of the above Chargers D.
'J' Train (Purple) consisting of the following:
1.
4160 volt Emergency Bus 2J 2.
480-vun Emergency Busses 2J and 2Jt 3.
120-vo!1 A C. Vital Bus 2 3 energized from its assccated inverter connected to O C bus 2 3, and 4.
120 volt A C. Vital Bus 2 4 energized from its ass cated inverter connected to D C bus 2 4.
5.
125 von D C. Busses No 2 3 & 2 4, and 6,
125-von D.C. Banery Banks 2111 & 2 tV ard Chargm 2-111 & 2 IV D C Bauery Charger 2C-Il may be used in place of elther of the above Chargers, APPLICABILITY:
a.
Moces 5 and 6 b.
During movement of irradiated fuel asserrt>Les or loads over irradiated fuel assemblies when no fuel asserTtiles are n the reactor vesset NORTH ANN A-UNIT 2 3/4812 Amendment No.138
ACTION:
With the atcve required train of A C. and D C. elecincat equpmera and busses rot tully OPER ABLE, immediately suspend all operatons involving CORE ALTERATIONS. posarve reactrvdy changes, rnovement of irradiated fuel assemblies, and movement of loads over irradiated fuel assernbles. Indiate correctrve acton to restore the required train of A C. and D C electncal equiprrent and busses to OPERABLE uatus as soon as possible.
SURyE]LLANCE REQUIREMENTS 4 8.2 2.1 The specified busses shall be determned energized in the required manner once per 7 days by verstying correct breaker alsnment and indcated vcliage on the busses.
4 8.2 1.2 The above required 125 volt battery bank and chargers shall be dertonstrated OPERABLE per Survei!!ance Requirement 4 8 2 3 2.
NORTH ANNA-UNIT 2 3/4 812a Amendment No. 138
'3/4.8 ELECTRICAL POWER SYSTEMS BASES 3/4.8.1 and 3/4.8.2 A.C. and D.C. POWER SOURCES AND DISTRIBUTION The OPERABillTY of the A.C. and 0.C. power sources and associated distribution systerrs 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 sou es and distribution systems satisfy the requirements of General Design Criteria 17 of Appendix "A" to 10 CFR 50.
The ACTION requirements specified for the levels of degradation of the power sources provide restriction upon continued facility operation ccmensurate with the level of degradation, The OFERABILITY of the power sources are consistent with the initial condition assumptions of the accident ar.alyses and are based upon maintaining at least one of each of the onsite A.C. and D.C. power sources and associated distribu-tion 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 E address the condition where sufficient pcwer 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 OPEPABILITY of the minimum specified A.C. and 0.C. power sources and associated distribution systems during shutdown and refueling ensures that 1) the f acility can be maintained in the shutdown or refueling condition for extended time periods, 2) sufficient instrumentation and control capability is available for monitoring and mainthining the unit status, and 3) sufficient power is available for systems necessary to recover f rom postulated events in these MODES, e.g.,
a fuel handling accident.
The Surveillance Requirements for demonstrating the OPERABillTY of the diesel generators are in accordance with the recommendations of Regulatory Guion 1.9
" Selection of Diesel Generator Set Capacity for Standby Power Supolies," 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.
The Surveillance Requirements for demonstrating the OPERABILITY of the Emergency Diesel Generator batteries and the Station batteries are based on the recom.endations of Ryulatory Guide 1.129 " Maintenance, Testing and Replacement of Large Lead Storige Batteries for Nuclear Power Plants," February 1978, and IEEE Std. 450-1980, "lEEZ Recomended Practice for l'.aintenance, Testing and Replacement of large Lead Sto" age Batteries for Generating Stations and Substations," as modified by Amendment No. 84 issued March 25, 1988.
I NORTH ANNA - UNIT 2 R 3/4 8 1 Amendment tio. (S Pf,138 i
3/4.8 ELECTRICAL POWER SYSTEMS BASES l
Containment electrical penetrations and penetration conductors are protected by either de-energizing circuits not required during reactor operation or by demon-strating the OPERABilliY of primary and backup overcurrent protection circuit breakers during period surveillance.
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 erch manufacturer's brand of circuit breaker and/or fuse.
Each manufacturer's molded case circuit breakers and/or fuses are grouped into representative samples bhich are then tested on a rotating basis to ensure that all breakers and/or fuses are tested.
If a wide variety exists within any manuf acturer's brand of molded case circuit breakers and/or f uses, it is necessary to divide that manufacturer's breakers and/or fuses into groups and treat each group as a separate type of breaker or fuse for surveillance purposes.
The OPERABILITY of the motor-operated valves thermal and ove. load protection and/or bypass devices ensures that these devices wii! not prev *.nt safety-related valves from performing their function.
The Surveillance Requirements for demon-strating 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.
l NORTH ANNA - UN1T 2 B 3/4 8-2 Amendment No.138
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