ML20080H776
| ML20080H776 | |
| Person / Time | |
|---|---|
| Site: | South Texas  |
| Issue date: | 02/14/1995 |
| From: | Alexion T Office of Nuclear Reactor Regulation |
| To: | |
| Shared Package | |
| ML20080H779 | List: |
| References | |
| NUDOCS 9502230339 | |
| Download: ML20080H776 (18) | |
Text
I:.
p ts; UNITED STATES n
3 i
NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20805 HOUSTON LIGHTING & POWER COMPANY CITY PUBLIC SERVICE BOARD OF SAN ANTONIO CENTRAL POWER AND LIGHT COMPANY CITY OF AUSTIN. TEXAS DOCKET NO. 50-498 6
SOUTH TEXAS PROJECT. UNIT 1 AMENDMENT TO FACILITY OPERATING LICENSE Amendment No. 71 License No. NPF-76 1.
The Nuclear Regulatory Commission (the Commission) has found that:
A.
ihe application for amendment by Houston Lighting & Power Company *
(HL&P) acting on behalf of itself and for the City Public Service Board of San Antonio (CPS), Central Power and Light Company (CPL),
and City of Austin, Texas (C0A) (the licensees), dated November 7, 1994, as supplemented by letters dated December 20, 1994, and January 23, 1995, 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; 4
B.
The facility will operate in conformity with the application, as amended, the provisions of the Act, and the rules and regulations of the Comission; l
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 license amendment will not be inimical to the common defense and security or to the health and safety of the public; and E.
The issuance of this amendment is in accordance with 10 CFR Part 51 of the Comission's regulations and all applicable requirements have been satisfied.
i P
- Houston Lighting & Power Company is authorized to act for the City Public Service Board of San Antonio, Central Power and Light Company and City of Austin, Texas and has exclusive responsibility and control over the physical construction, operation and maintenance of the facility.
9502230339 950214 PDR ADOCK 05000499-P PDR
l.
' 2.
Accordingly, the license is amended by changes to the Technical Specifications as indicated in the attachment to this license amendment and Paragraph 2.C.(2) of Facility Operating License No. NPF-76 is hereby amended to read as follows:
2.
Technical Specifications The Technical Specifications contained in Appendix A, as revised through Amendment No. 71, and the Environmental Protection Plan contained in Appendix B, are hereby incorporated in the license.
The licensee shall operate the facility in accordance with the Technical Specifications and the Environmental Protection Plan.
3.
The license amendment is effective as of its date of issuance to be implemented within 31 days of issuance.
FOR THE NUCLEAR REGULATORY COPMISSION I
v homas W. Alexion, Project Manager Project Directorate IV-1 Division of Reactor Projects III/IV Office of Nuclear R0 actor Regulation
Attachment:
Changes to the lechnical Specifications Date of Issuance:
February 14, 1995
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UNITED STATES s-NUCLEAR REGULATORY COMMISSION a
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- /
HOUSTON LIGHTING & POWER COMPANY CITY PUBLIC SERVICE BOARD OF SAN ANTONIO CENTRAL POWER AND LIGHT COMPANY i
CITY OF AUSTIN. TEXAS DOCKET NO. 50-499 SOUTH TEXAS PROJECT. UNIT 2 l
AMENDMENT TO FACILITY OPERATING LICENSE Amendment No. 60 License No. NPF-80 1.
The Nuclear Regulatory Commissir,n (the Commission) has found that:
A.
The application for amer.&,ent by Houston Lighting & Power Company
- 1 (HL&P) acting on behalf of itself and for the City Public Service Board of San Antonio (CPS), Central Power and Light Company (CPL),
and City of Austin, Texas (C0A) (the licensees), dated November 7, 1994, as supplemented by letters dated December 6,1994, and January 23, 1995, 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, as amended, 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 ondangering 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 license amendment will not be inimical to the common defense and security or to the health and safety of the public; and i
E.
The issuance of this amendment is in accordance with 10 CFR Part 51 of the Commission's regulations and all applicable requirements have i
been satisfied.
- Houston Lighting & Power Company is authorized to act for the City Public Service Board of San Antonio, Central Power and Light Company and City of Austin, Texas and has exclusive responsibility and control over the physical construction, operation and maintenance of the facility.
t
. 2.
Accordingly, the license is amended by changes to the Technical Specifications as indicated in the attachment to this license amendment and Paragraph 2.C.(2) of Facility Operating License No. NPF-80 is hereby amended to read as follows:
2.
Technical Specifications The Technical Specifications contained in Appendix A, as revised through Amendment No. 60, and the Environmental Protection Plan contained in Appendix B, are hereby incorporated in the license.
The licensee shall operate the facility in accordance with the Technical Specifications and the Environmental Protection Plan.
3.
The license amendment is effective as of its date of issuance to be implemented within 31 days of issuance.
FOR THE NUCLEAR REGULATORY COMISSION
[
omas W. Alexion, Project Manager Project Directorate IV-1 Division of Reactor Projects III/IV Office of Nuclear Reactor Regulation
Attachment:
Changes to the Technical Specifications Date of Issuance:
February 14, 1995
t ATTACHMENT TO LICENSE AMENDMENT NOS. 71 AND 60 1
FACILITY OPERATING LICENSE NOS. NPF-76 AND NPF-80 DOCKET NOS. 50-498 AND 50-499 Replace the following pages of the Appendix A Technical Specifications with the attached pages. The revised pages are identified by Amendment number and contain marginal lines indicating the areas of change. The corresponding l
overleaf pages are also provided to maintain document completeness.
i REMOVE INSERT l
3/4 8-9 3/4 8-9 3
3/4 8-9a 3/4 8-13 3/4 8-13 3/4 8-16 3/4 8-16 3/4 9-14 3/4 9-14 B 3/4 8-14 8 3/4 8-14 8 3/4 8-15 B 3/4 8-15 B 3/4 8-16 8 3/4 9-3 B 3/4 9-3 B 3/4 9-4 B 3/4 9-4
i.
ELECTRICAL POWER SYSTEMS A.C. SOURCES SHUTDOWN LIMITING CONDITION FOR OPERATION 3.8.1.2 As a minimum,.the following 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.
Two' standby diesel generators each with a separate fuel tank l
l containing a minimum volume of 60,500 gallons of fuel.
APPLICABILITY: MODE 5 and MODE 6 with water level in the refueling cavity <23 i
ft above the reactor pressure vessel flange.
I ACTION:
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, operations with a potential for draining the reactor vessel or crane operation with loads over J
the spent fuel pool.
Immediately initiate actions to restore the inoperable 1
A.C. electrical power source to OPERABLE status.
SURVEILLANCE REGUIREMENTS j
4.8.1.2 The above required A.C. electrical power sources shall be demonstrated OPERABLE by the performance of each of the requirements of Specifications 4.8.1.1.1, 4.8.1.1.2 (except for Specification 4.8.1.1.2a.3),
and 4.8.1.1.3.
+
4.8.1.2.1 The alternate onsite emergency power source shall be demonstrated functional by:
a.
Within 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br /> of taking credit for the onsite emergency power source as a standby diesel generator, verify It starts and achieves steady state voltage (f10%) and frequency (f2%) in 5 minutes.
b.
Within 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br /> of taking credit for the onsite emergency power source as a standby diesel generator and every 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> thereafter, verify the emergency power source is capable of being aligned to the required ESF bus by performing a breaker alignment check.
'An alternate onsite emergency power source, capable of supplying power for onetrainofsputdowncoolingmaybesubstitutedforoneoftherequired diesels for 14 consecutive days (SR 4.8.1.2.1 is the only requirement 1
applicable).
221 consecutive days for 1RE05 and 2RE04 Refueling Outages only.
SOUTH TEXAS - UNITS 1 & 2 3/4 8-9 Unit 1 - Amendment No. 71 Unit 2 - Amendment No. 60
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ELECTRICAL POWER SYSTEMS l
A.C. SOURCES SHUTDOWN LIMITING CONDITION FOR OPERATION 3.8.1.3 As a minimum, the following A.C. electrical. power sources shall be 1
OPERABLE:
a.
One circuit between the offsite transmission network and the Onsite Class IE Distribution System, and b.
One standby diesel generator with a separate fuel tank containing a minimum volume of 60,500 gallons of fuel.
APPLICABILITY: MODE 6 with water level in the refueling cavity 223 ft above the reactor pressure vessel flange.
i ACTION:
With less than the above minimum required A.C. electrical power sources OPERABLE, immediately suspend all operations involving CORE ALTERATIONS, l
positive reactivity changes, movement of irradiated fuel, operations with a i
potential for draining the reactor vessel or crane operation with loads over the spent fuel pool.
Inunediately initiate actions to restore the inoperable A.C. electrical power source to OPERABLE status.
l SURVEILLANCE REQUIREMENTS 4.8.1.3 The above required A.C. electrical power sources shall be f
demonstrated OPERABLE by the performance of each of the requirements of Specifications 4.8.1.1.1, 4.8.1.1.2 (except for Specification 4.8.1.1.2a.3),
i
- .cd 4.8.1.1.3.
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i SOUTH TEXAS - UNITS 1 & 2 3/4 8-9a Unit 1 - Amendment No. 71 Unit 2 - Amendment No. 60 i
ELECTRICAL POWER SYSTEMS 3/4.8.2 D.C. SOURCES OPERATING LIMITING CONDITION FOR OPERATION 3.8.2.1 As a minimum, the following D.C. electrical sources shall be OPERABLE:
a.
Channel I 125-volt Battery Bank EIA11 (Unit 1), E2A11-(Unit 2) and l
its two associated chargers, b.
Channel II 125-volt Battery Bank E1D11 (Unit 1), E2011 (Unit 2) and
(
its associated full capacity charger, c.
Channel III 125-volt Battery Bank E1811 (Unit 1), E2811 (Unit 2) and l
its associated full capacity charger, and d.
Channel IV 125-volt Battery Bank E1C11 (Unit 1), E2C11 (Unit 2) and l
its two associated chargers.
APPLICABILITY:
MDDES 1, 2, 3, and 4.
ACTION:
a.
With one of the required battery banks, and/or one of the required chargers for the Channels II or III inoperable, restore the inoperable battery bank i
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 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 only one charger on Channel I or IV OPERABLE, demonstrate the OPERABILITY of the associated battery bank by performing Surveillance Requirement 4.8.2.1.a.1) within 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> and at least once per 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> thereafter.
If any Category A limit in Table 4.8-2 is not met, declare the battery inoperable.
Restore the inoperable charger to OPERABLE status within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> or be in at least HOT STANDBY within the next 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> and in COLD SHUTDOWN within the following 30 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br />.
SURVEILLINCE REQUIREMENTS 4.8.2.1 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 4.8-2 meet the Category A limits, and 2)
The total battery terminal voltage is greater than or equal to 129 volts on float charge.
SOUTH TEXAS - UNITS 1 & 2 3/4 8-10 Unit I - Amendment No. 4 1
4 l
l ELECTRICAL POWER SYSTEMS 0.C. SOURCES SHUTDOWN LIMITING CONDITION FOR OPERATION 3.8.2.2 DC electrical power subsystem shall be OPERABLE to support the DC electrical power distribution subsystem (s) required by LCO 3.8.3.2, "Onsite Power Distribution - Shutdown."
APPLICABILITY: MODES 5 and 6.
j ACTION:
With one or more required DC elettrical power subsystems inoperable, immediately declare affected required feature (s) inoperable OR immediately initiate action to suspend operations with a potential for draining the reactor vessel, suspend all operations involving CORE ALTERATIONS, positive reactivity changes, or movement of irradiated fuel; initiate corrective action to restore the required DC electrical power subsystems to OPERABLE status as soon as possible.
SURVEILLANCE RE0VIREMENT 4.8.2.2 The required DC sources shall be demonstrated OPERABLE in accordance l
with Specification 4.8.2.1.
SOUTH TEXAS - UNITS 1 & 2 3/4 8-13 Unit 1 - Amendment No. 4 71 Unit 2-AmendmentNo.66
I ELECTRICAL POWER SYSTEMS 3/4.8.3 ONSITE POWER DISTRIBUTION OPERATING LIMITING CONDITION FOR OPERATION 3.8.3.1 The following electrical busses shall be energized in the specified manner:
a.
Train A A.C. ESF. Busses consisting of:
1) 4160-Volt ESF Bus # EIA (Unit 1), E2A (Unit 2), and 2) 480-Volt ESF Busses # E1A1 and EIA2 (Unit 1), E2A1 and E2A2 (Unit 2) from respective load center transformers, b.
Train B A.C. ESF Busses consisting of:
1) 4160-Yelt ESF Bus # dd (Unit 1), E2B (Unit 2), and 2) 480-Volt ESF Busses # E181 and E182 (Unit 1), E281 and E282 (Unit 2) from respective load center transformers.
c.
Train C A.C. ESF Busses consisting of:
1) 4160-Volt ESF Bus # E1C (Unit 1), E2C (Unit 2), and 2) 480-Volt ESF Busses # E1C1 and E1C2 (Unit 1), E2C1 and E2C2 (Unit 2) from respective load center transformers.
d.
120-Volta.C.VitalDistributionPanelsDP1201andDP001ener! zed i
from their associated inverters connected to D.C. Bus # EIAll (Unit 1), E2A11* (Unit 2),
e.
120-Volt A.C. Vital Distribution Panel DP1202 energized from its associated inverter connected to D.C. Bus # E1D11* (Unit 1), E2D11*
(Unit 2),
f.
120-Volt A.C. Vital Distribution Panel DP1203 energized from its l
associated inverter connected to D.C. Bus # E1811* (Unit 1), E2B11*
(Unit 2),
g.
120-Volta.C.VitalDistributionPanelsDP1204andDP002 energized from their associated inverters connected to D.C. Bus # E1C11 (Unit 1), E2C11* (Unit 2),
h.
125-Volt D.C. Bus EIA11 (Unit 1) E2A11 (Unit 2) energized from Battery Bank E1A11 (Unit 1), E2A11 (Unit 2),
i.
125-Volt D.C. Bus E1011 (Unit 1) E2D11 (Unit 2) energized from Battery Bank E1D11 (Unit 1), E2011 (Unit 2),
j.
125-Volt D.C. Bus ElB11 (Unit 1) E2B11 (Unit 2) energized from Battery Bank ElB11 (Unit 1), E2B11 (Unit 2), and k.
125-Volt D.C. Bus E1C11 (Unit 1) E2C11 (Unit 2) energized from Battery Bank E1C11 (Unit 1), E2C11 (Unit 2).
- The inverter (s) associated with one channel may be disconnected from its D.C.
bus 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 equaliz-ing charge on its associated battery bank provided:
(1) its vital distribu-tion panels are energized, and (2) the vital distribution panels associated with the other battery banks are energized from their associated inverters and connected to their associated D.C. busses.
SOUTH TEXAS - UNITS 1 & 2 3/4 8-14 Unit I-Amendment No. 4
I-ELECTRICAL POWER SYSTENS LIMITING CONDITIDN FOR OPERATION (Continued)
APPLICA8ILITY:
MODES 1, 2, 3, and 4.
ACTION:
a.
With one of the required trains of A.C. EIF busses not fully energiz1d reenergize the train within 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> or be in et least H0T STAND 8Y 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 />.
1 b.
With one A.C. vital distribution panel either not energized from its associated inverter, or with the inverter not connected to its asso-ciated D.C. bus:
(1) reene gize the A.C. distribution panel 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 STAND 8Y 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 />; and (2) reenergize the A.C. vital distribution panel from its associated inverter connected to its associated 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 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 />.
c.
With one D.C. bus not energized from its associated battery bank, reenergize the D.C. bus from its associated battery bank within 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> or be in at least HOT STANDBY within the next 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> and in COLD SHUTDOWN within the following 30 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br />.
SURVEILLANCF REOUIREMENTS 4.8.3.1 The specified busses shall be determined energized in the required manner at least once per 7 days by verifying correct breaker alignment and indicated voltage on the busses.
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t SOUTH TEXAS - UNITS 1 & 2 3/4 8-15 i
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ELECTRICAL POWER SYSTEMS ONSITE POWER DISTRIBUTION SHUTDOWN LIMITING CONDITION FOR OPERATION 3.8.3.2 The necessary portion of AC, DC, and AC vital bus electrical power distribution subsystems shall be OPERABLE to support equipment required to be OPERABLE.
APPLICABILITY: MODES 5 and 6.
ACTION:
With one or more required AC, DC, or AC vital bus electrical power distribution subsystems inoperable, immediately declare associated supported required feature (s) inoperable OR immediately initiate action to suspend operations with a potential for draining the reactor vessel, suspend all operations involving CORE ALTERATIONS, positive reactivity changes, movement of irradiated fuel, and immediately initiate corrective action to restore reonired AC, DC, and AC vital bus electrical power distribution subsystems to O!!aABLE status and declare associated required residual heat removal subsystem (s) inoperable and not in operation.
SURVEILLANCE REQUIREMENT 4.8.3.2 Verify correct breaker alignment and voltage to required AC, DC, and AC vital bus electrical power distribution subsystems at least once per 7 days.
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SOUTH TEXAS - UNITSI & 2 3/4 8-16 Unit 1 - Amendment No. 4,71
)
Unit 2 - faendment No. 60
)
REFUELING OPERATIONS IN-CONTAINMENT STORAGE POOL LIMITING CDNDITIDN FOR OPERATION 3.9.11.2 At least 23 feet of water shall be maintained over the top of irradiated fuel assemblies seated in the storage racks.
APPLICABILITY: Whenever irradiated fuel assemblies are in the in-containment storage pool.
i ACTION:
a.
With the requirements of the above specification not satisfied, sus-pend all movement of fuel assemblies and crane operations with loads in the fuel storage areas and restore the water level to within its limit within 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br />.
b.
The provisions of Specification 3.0.3 are not applicable.
SURVEILLANCE REQUIREMENTS 4.9.11.2 The water level in the in-containment storage pool shall be deter-mined to be at least its minimum required depth at least once per 7 days when irradiated fuel assemblies are in the in-containment storage pool.
SOUTH TEXAS - UNITS 1 & 2 3/4 9-13
1 REFUELING OPERATIONS 3/4.9.12 FUEL HANDLING BUILDING EXHAUST AIR SYSTEM LIMITING CONDITION FOR OPERATION t
3.9.12 The FHB Exhaust Air System comprised of the following components i
shall be OPERABLE:
a.
Two exhaust air filter trains, b.
Two of three exhaust booster fans, l
c.
Two of three main exhaust fans, and l
d.
Associated dampers.
APPLICABILITY: Whenever irradiated fuel is in the spent fuel pool.
ACTION:
a.
With less than the above FHB Exhaust Air System components OPERABLE but with at least one FHB exhaust air filter train, one FHB exhaust booster fan, one FHB main exhaust fan, and associated dampers OPERABLE, fuel movement within the spent fuel pool or crane operation with loads over the spent fuel pool may proceed provided the OPERABLE FHB Exhaust Air System components are capable of being powered from an OPERABLE emergency power source and are in operation and discharging through at least one train of HEPA filters and charcoal absorbers.
l b.
With no FHB exhaust air filter train OPERABLE, suspend all 1
operations involving movement of fuel within the spent fuel pool or crane operation with loads over the spent fuel pool.
c.
The provisions of Specification 3.0.3 are not applicable.
SURVEILLANCE REQUIREMENTS 4.9.12 The above required FHB Exhaust Air Systems shall be demonstrated OPERABLE:
a.
At least once per 31 days on a STAGGERED TEST BASIS by initiating, from the control room, flow through the HEPA filters and charcoal adsorbers and verifying that the system operates for at least 10 continuous hours with the heaters operating with the operable exht.ust booster fans and the operable main exhaust fans operating to maintain adequate air flow rate;
' At least one FHB exhaust air filter train, one FHB exhaust booster fan, and one FHB main exhaust fan are capable of being powered from an OPERABLE onsite emergency power source.
SOUTH TEXAS - UNITS 1 & 2 3/4 9-14 Unit 1 - Amendment No. 71 Unit 2 - Amendment No. 60
I.
ELECTRICAL POWER SYSTEMS i
)
BASES A.C. SOURCES. D.C. SOURCES. and ONSITE POWER DISTRIBUTI/a (Continued)
SR 4.s.1.1.2.e.11 j
As required by Regulatory Guide 1.108, paragraph 2.a.(2), each DG is required to demonstrate proper operation for the D8A loading sequence to ensure that voltage and frequency are maintained within the required limits. Under accident conditions, prior to connecting the DGs to their respective busses, all loads are shed except load center feeders and those motor control centers that power Class IE loads (referred to as ' permanently connected" loads).
Upon reaching 905 of rated voltage and frequency, the DGs are then connected to their respective busses.
Loads are then sequentially connected to the bus by the automatic load i
sequencer. This sequencing logic controls the permissive and starting signals to motor breakers to prevent overloading of the DGs due to high motor starting
)
currents. The 105 load sequence time interval tolerance ensures that i
sufficient time exists for the DG to restore frequency and voltage prior to applying the next load and that safety analysis assumptions regarding ESF 3
equipment time delays are not violated.
The Frequency of 18 months is consistent with the recommendation of Regulatory i
Guide 1.108, paragraph 2.a.(2), takes into consideration unit conditions required to perform the Surveillance, and is intended to be consistent with expected fuel cycle lengths.
SR 4.8.1.1.2.e.12 This SR verifies that the diesel will not start when the emergency stop lockout feature is tripped. This prevents any further damage to the diesel engine or generator.
SR 4.8.1.1.2.e.13 This SR verifies the requirements of Branch Technical Position PSB-1 that the load shedding scheme automatically prevents load shedding during the sequencing of the emergency loads to the bus.
It also verifies the reinstatement-of the load shedding feature upon completion of the load sequencing action.
SR 4.8.1.1.2.f This Surveillance demonstrates that the DG starting independence has not been compromised. Also, this Surveillance demonstrates that each engine can i
achieve proper speed within the specified time when the DGs are started simultaneously.
SOUTH TEXAS - UNITS 1 & 2 B 3/4 8-13 Unit 1 - Amendment No. 68 Unit 2 - Amendment No. 57
{
ELECTRICAL POWER SYSTEMS t
BASES e
A.C. S9JRCES. D.C. SOURCES. and DNSITE POWER DISTRIBUTION (Continued) t The 10 year Frequency is consistent with the recommendations of Regulatory Guide 1.108, paragraph 2.b, and Regulatory Guide 1.137, paragraph C.2.f.
[
This SR provided assurance that any accumulation of sediment over time or the normal wear on the system has not degraded the diesels.
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, and (2) sufficient instrumentation and control capability is available for monitoring and maintaining the unit status.
The alternate onsite emergency power source will be capable of being loaded with, but not limited to, one train of the following equipment: RHR, ECW, CCW, associated instrumentation, Control Room Makeup and Cleanup Filtration System and a 150 ton EAB Chiller. This alternate onsite emergency power source will be capable of being started and loaded in sufficient time to prevent the reactor coolant temperature from exceeding design limits.
The Surveillance Requirements for demonstrating the OPERABILITY of the diesel generators are in accordance with the recommendations of Regulatory Guides 1.9, " Selection of Diesel Generator Set Capacity for Standby Power Supplies," Revision 2, December 1979; 1.108, " Periodic Testing of Diesel Generator Units Used as Onsite Electric Power Systems at Nuclear Power Plants," Revision 1, August 1977; and ASTM D975-81, ASTM D1552-79, ASTM D2622-82, ASTM D4294-83, and ASTM D2276-78. The standby diesel generators auxiliary systems are designed to circulate warm oil and water through the diesel while the diesel is not running, to preclude cold ambient starts.
For the purposes of surveillance testing, ambient conditions are considered to be the hot prelube condition.
The Surveillance Requirements for demonstrating the OPERABILITY of the station batteries are based on the recommendations 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, "IEEE Recommiended Practice for Maintenance, Testing, and Replacement of Large Lead Storage Batteries for Generating Stations and Substations."
j Verifying average electrolyte temperature above the minimum for which the battery was sized, total battery terminal voltage on float charge, connecticn i
resistance values, and the performance of battery service and discharge tests i
ensures the effectiveness of the charging system, the ability to handle high discharge rates, and compares the battery capacity at that time with the rated capacity.
SOUTH TEXAS - UNITS 1 & 2 8 3/4 8-14 Unit 1 - Amendment No. 68, 71 Unit 2 - Amendment No. 9, 60
.l ELECTRICAL POWER SYSTEMS BASES A.C. SOURCES. D.C. SOURCES. and ONSITE POWER DISTRIBUTION (Continued) l Table 4.8-2 specifies the normal limits for each designated pilot cell and each connected cell for electrolyte level, float voltage, and specific gravity. The limits for the designated pilot cells float voltage and specific gravity, greater than 2.13 volts and 0.015 below the manufacturer's full charge specific gravity or a battery charger current that ha'd stabilized at a low value, are characteristic of a charged cell with adequate capacity. The normal limits for each connected cell for float voltage and specific gravity, greater than 2.13 volts and not more than 0.020 below the manufacturer's full charge specific gravity with an average specific gravity of all the connected cells not more than 0.010 below the manufacturer's full charge specific gravity, ensures the OPERABILITY and capability of the battery.
Operation with a battery cell's parameter outside the normal limit but within the allowable value specified in Table 4.8-2 is permitted for up to 7 days. During this 7-day period:
(1) the allowable values for electrolyte level ensures no physical damage to the plates with an adequate electron transfer capability; (2) the allowable value for the average specific gravity of all the cells, not more than 0.020 below the manufacturer's recommended full charge specific gravity, ensures that the decrease in rating will be less than the safety margin provided in sizing; (3) the allowable value for an individual cell's specific gravity, ensures that an individual cell's specific gravity will not be more than 0.040 below the manufacturer's full charge specific gravity and that the overall capability of the battery will be maintained within an acceptable !imit; and (4) the allowable value for an individual cell's float voltage, greater than 2.07 volts, ensures the battery's capability to perform its design function.
3/4.8.4 ELECTRICAL E0VIPMENT PROTECTIVE DEVICES Containment electrical penetrations and penetration conductors are protected by either deenergizing circuits not required during reactor operation or by demonstrating the OPERABILITY of primary and backup overcurrent protection circuit breakers during periodic surveillance.
The Surveillance Requirements applicable to lower voltage circuit breakers provide assurance of breaker reliability by testing a representative sample of at least 10% of each manufacturer's brand of circuit breaker.
Each manufacturer's molded case and metal case circuit breakers are grouped into representative samples which are then tested on a rotating basis to ensure that all breakers are tested.
If a wide variety exists within any manufacturer's brand of circuit breakers it is necessary to divide that manufacturer's breakers into groups and treat each group as a separate type of breaker for surveillance purposes.
SOUTH TEXAS - UNITS 1 & 2 B 3/4 8-15 Unit 1 - Amendment No. 68, 71 Unit 2 - Amendment No. 57, 60
'j-ELECTRICAL POWER SYSTEMS BASES A.C. SOURCES. D.C. SOURCES. and DNSITE POWER DISTRIBUTION (Continued)
The molded case circuit breakers will be tested in accordance with NEMA Standard Publication No. AB-2-1980.
For a frame size of 250 amperes or less, the field tolerance of the high and low setting of the injected current will be within + 40%, -25% of the setpoint (pickup) value.
For a frame size of 400 amperes or greater, the field tolerance will be f25% of the setpoint (pickup) value. The circuit breakers should not be affected when tested within their tolerance.
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SOUTH TEXAS - UNITS 1 & 2 B 3/4 8-16 Unit 1 - Amendment No. 68, 71 Unit 2 - Amendment No. 67, 60
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REFUELING OPERATIONS BASES 3/4.9.8 RESIDUAL HEAT REMOVAL AND COOLANT CIRCULATION The requirement that at least one residual heat removal (RHR)ble toloop be in operation ensures that:
(1) sufficient cooling capacity is availa remove decay heat and maintain the water in the reactor vessel below 140*F as required during the REFUELING MODE, and (2) sufficient coolant circulation is maintained through the core to minimize the effect of a boron dilution incident and prevent boron stratification.
The requirement to have two RHR loops OPERABLE when there is less than 23 feet of water above the reactor vessel flange ensures that a single failure of the operating RilR loop will not result in a complete loss of ressdual heat removal capability. With the reactor vessel head removed and at least 23 feet of water above the reactor pressure vessel flange, a large heat sink is available for core cooling. Thus, in the event of a failure of the operating RHR loop, adequate time is provided to initiate emergency procedures to cool the core.
3/4.9.9 CONTAINMENT VENTILATION ISOLATION SYSTEM The OPERABILITY of this system ensures that the containment purge and exhaust penetrations will be automatically isolated upon detection of high radiation levels in the purge exhaust. The OPERABILITY of this system is required to restrict the release of radioactive material from the containment atmosphere to the environment.
3/4.9.10 and 3/4.9.11 WATER LEVEL - REFUELING CAVITY AND STORAGE POOLS l
The restrictirns on minimum water level ensure that sufficient water t
depth is available 20 remove 99% of the assumed 10% iodine gap activity released from the rupture of an irradiated fuel assembly. The minimum water depth is consistent with the assumptions of the safety analysis.
j 3/4.9.12 FUEL HANDLING BUILDING EXHAUST AIR SYSTEM The limitations on the Fuel Handling Building Exhaust Air System ensure that all radioactive material released from an irradiated fuel assembly will be filtered through the HEPA filters and charcoal adsorber prior to discharge to the atmosphere. Operation of the system with the heaters operating for at least 10 continuous hours in a 31-day period is sufficient to reduce the buildup of moisture on the adsorbers and HEPA filters. The OPERABILITY of this system and the resulting iodine removal capacity are consistent with the assumptions of the safety analyses. ANSI N510-1980 will be used as a procedural guide for sureillance testing. This Specification has been modified by a note that states, at least one FHB exhaust air filter train, one FHB exhaust booster fan, and one FHB main exhaust fan are capable of being powered from an Onsite emergency power source. This notes ensures that required FHB exhaust train components will have an emergency power source available, even if the limiting conditions for operation can be satisfied.
SOUTH TEXAS - UNITS 1 & 2 8 3/4 9-3 Unit 1 - Amendment No. 69, 71 Unit 2 - Amendment No. 58, 60
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REFUELING OPERATIONS BASES i
3/4.9.12 FUEL HANDLING BUILDING EXHAUST AIR SYSTEM (Continued) i Examples of onsite emergency power sources that satisfy this requirement are:
l In all MODES / CONDITIONS, (a) OPERABLE ESF diesel generator for the associated required components; IN MODES / CONDITIONS below M00E 4, (b) OPERA 8LE ESF diesel l
generator capable of supplying the required components via cross tied trains, allowing one diesel generator to supply all required components, (c) an approved non-safety related diesel generator, capable of supplying the required filter train loads in conjunction with an ESF diesel.
3/4.9.13 SPENT FUEL P0OL NIIIIMUM BORON CONCENTRATION The restrictions on the boron concentration of the spent fuel pool i
ensures that the rack K is maintained less than or equal to 0.95 in the i
event that one or more Nel assemblies are improperly loaded in the spent fuel l
pool storage racks (with respect to Specification 5.6).
Since the presence of will be maintained less than or equal to 0.95 l
boron is ensured, the rack K,/ng of fuel assemblies.
in the event of improper loa 8 This boron concentration i
is more than adequate to ensure the K limit of 0.95, specified in i
Specification 5.6.1.1.a, will not be I((olated under the following scenarios:
i (1) in Region 1, any misloading of Category 1, 2, 3, and 4 assemblies; or j
(2) in Region 2, the misloading of one Category 1 assembly into the center of a fully loaded checkerboard area also containing Category 1 i
assemblies; or, j
(3) the misloading of a Category I assembly in a Region I rack adjacent to a Category 1 assembly in a Region 2 rack.
I This boron concentration limit is the value necessary to ensure that the 0.95 l
K,,, limit for rack criticality will not be violated in the event of a Category 1 assembly dropped in the gap between the pool wall and a Region 2 i
rack module.
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SOUTH TEXAS - UNITS 1 & 2 B 3/4 9-4 Unit 1 - Amendment No. 4h49, 71 Unit 2 - Amendment No. 3h48, 60
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