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| | number = ML16236A095 | | | number = ML16236A095 |
| | issue date = 08/25/2016 | | | issue date = 08/25/2016 |
| | title = Callaway Plant and Wolf Creek Generating Station - August 25, 2016, Class 1E Electrical Equipment Air Conditioning System Pre-Application Meeting (CAC No. MF8136) | | | title = and Wolf Creek Generating Station - August 25, 2016, Class 1E Electrical Equipment Air Conditioning System Pre-Application Meeting |
| | author name = | | | author name = |
| | author affiliation = Ameren Missouri | | | author affiliation = Ameren Missouri |
| Line 9: |
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| | docket = 05000482, 05000483 | | | docket = 05000482, 05000483 |
| | license number = NPF-030, NPF-042 | | | license number = NPF-030, NPF-042 |
| | contact person = Lyon C F, 415-2296 | | | contact person = Lyon C, 415-2296 |
| | case reference number = CAC MF8136 | | | case reference number = CAC MF8136 |
| | document type = Meeting Briefing Package/Handouts, Slides and Viewgraphs | | | document type = Meeting Briefing Package/Handouts, Slides and Viewgraphs |
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| =Text= | | =Text= |
| {{#Wiki_filter:CALLAWAY PLANT WOLF CREEK GENERATING STATION Class 1E Electrical Equipment Air Conditioning (A/C) System Pre-Application Meeting August 25, 2016 AGENDA *Introductions | | {{#Wiki_filter:CALLAWAY PLANT WOLF CREEK GENERATING STATION Class 1E Electrical Equipment Air Conditioning (A/C) System Pre-Application Meeting August 25, 2016 |
| *Purpose *Class 1E Electrical Equipment A/C System Description
| | |
| *Background
| | AGENDA |
| *Proposed Technical Specification (TS)
| | * Introductions |
| *Evaluation Basis
| | * Purpose |
| *Precedent *Planned Modifications
| | * Class 1E Electrical Equipment A/C System Description |
| *Schedule 2 PURPOSE *Problem statement:
| | * Background |
| -A loss of a Class 1E electrical equipment A/C train requires the associated electrical TS LCO's to be declared not met, which requires entry into LCO 3.0.3
| | * Proposed Technical Specification (TS) |
| *Resolution
| | * Evaluation Basis |
| -License amendment request to incorporate the Class 1E Electrical Equipment A/C System into the TS -Planned modifications developed for either (i.e., one)
| | * Precedent |
| | * Planned Modifications |
| | * Schedule 2 |
| | |
| | PURPOSE |
| | * Problem statement: |
| | - A loss of a Class 1E electrical equipment A/C train requires the associated electrical TS LCOs to be declared not met, which requires entry into LCO 3.0.3 |
| | * Resolution |
| | - License amendment request to incorporate the Class 1E Electrical Equipment A/C System into the TS |
| | - Planned modifications developed for either (i.e., one) |
| A/C train to cool both trains of electrical equipment | | A/C train to cool both trains of electrical equipment |
| -Will minimize challenges to plant systems and to the operators, and will facilitate preventive maintenance activities 3
| | - Will minimize challenges to plant systems and to the operators, and will facilitate preventive maintenance activities 3 |
| | |
| | CLASS 1E ELECTRICAL EQUIPMENT A/C SYSTEM DESCRIPTION |
| | * Design/Licensing Basis |
| | - Design basis function is to provide a suitable atmosphere for the Class 1E electrical equipment during all modes of plant operation, including loss of preferred power and post-accident operation |
| | - System is safety related and required to function following a DBA to cool components required to achieve and maintain the plant in a post-accident safe shutdown condition |
| | - Two independent trains operated in continuous recirculation mode maintain room temperatures 90ºF for normal maximum steady state environmental conditions |
| | - One train (with implementation of mitigating actions) will maintain room temperatures 104°F for maximum accident/faulted environmental conditions 4 |
| | |
| CLASS 1E ELECTRICAL EQUIPMENT A/C SYSTEM DESCRIPTION | | CLASS 1E ELECTRICAL EQUIPMENT A/C SYSTEM DESCRIPTION |
| *Design/Licensing Basis
| | * Equipment Description Cooling Capacity: 30 tons o One train capable of cooling both trains of electrical equipment rooms Direct expansion refrigeration circuit with evaporator coils in air handling unit Heat rejected through condenser to Essential Service Water System Recirculation only - no outside air capabilities 5 |
| -Design basis function is to provide a suitable atmosphere for the Class 1E electrical equipment during all modes of plant operation, including loss of preferred power and post
| | |
| -accident operation
| | CLASS 1E ELECTRICAL EQUIPMENT A/C SYSTEM DESCRIPTION 2016 Level 6 |
| -System is safety related and required to function following a DBA to cool components required to achieve and maintain the plant in a post
| |
| -accident safe shutdown condition
| |
| -Two independent trains operated in continuous recirculation mode maintain room temperatures environmental conditions
| |
| -One train (with implementation of mitigating actions) 104°F for maximum accident/faulted environmental conditions 4
| |
| CLASS 1E ELECTRICAL EQUIPMENT A/C SYSTEM DESCRIPTION 5 *Equipment Description Cooling Capacity: 30 tons oOne train capable of cooling both trains of electrical equipment rooms Direct expansion refrigeration circuit with evaporator coils in air handling unit Heat rejected through condenser to Essential Service Water System Recirculation only
| |
| - no outside air capabilities | |
|
| |
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| CLASS 1E ELECTRICAL EQUIPMENT A/C SYSTEM DESCRIPTION 6 2016 Level | | CLASS 1E ELECTRICAL EQUIPMENT A/C SYSTEM DESCRIPTION SECURITY-RELATED INFORMATION - WITHHOLD UNDER 10 CFR 2.390 7 |
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| CLASS 1E ELECTRICAL EQUIPMENT A/C SYSTEM DESCRIPTION 7 SECURITY-RELATED INFORMATION | | CLASS 1E ELECTRICAL EQUIPMENT A/C SYSTEM DESCRIPTION 2000 Level 8 |
| - WITHHOLD UNDER 10 CFR 2.390
| |
|
| |
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| CLASS 1E ELECTRICAL EQUIPMENT A/C SYSTEM DESCRIPTION 8 2000 Level | | CLASS 1E ELECTRICAL EQUIPMENT A/C SYSTEM DESCRIPTION SECURITY-RELATED INFORMATION - WITHHOLD UNDER 10 CFR 2.390 9 |
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| CLASS 1E ELECTRICAL EQUIPMENT A/C SYSTEM DESCRIPTION 9 SECURITY-RELATED INFORMATION
| | BACKGROUND |
| - WITHHOLD UNDER 10 CFR 2.390 | | * Operational issues identified for a loss of one train of cooling |
| | - TS 1.1 Definition of OPERABLE-OPERABILITY |
| | - Application of LCO 3.0.6 |
| | - Single failure criterion |
| | * Class 1E electrical equipment A/C trains support the DC Sources, Inverters, and Distribution Systems |
| | - Not addressed in TSs or TS Bases 10 |
|
| |
|
| BACKGROUND | | BACKGROUND |
| *Operational issues identified for a loss of one train of cooling
| | * On loss of one train of cooling, the associated supported Class 1E electrical equipment is declared inoperable |
| -TS 1.1 Definition of OPERABLE
| | - TSs LCOs 3.8.4, 3.8.7 and 3.8.9 are declared not met due to the inoperable Class 1E electrical equipment |
| -OPERABILITY
| | - LCO 3.0.3 entered due to no Condition in TS 3.8.7 for two inoperable inverters |
| -Application of LCO 3.0.6
| | * The Operability Determination process is entered and compensatory measures are established for declaring Class 1E electrical equipment OPERABLE/degraded 11 |
| -Single failure criterion *Class 1E electrical equipment A/C trains support the DC Sources, Inverters, and Distribution Systems -Not addressed in TSs or TS Bases 10 BACKGROUND
| | |
| *On loss of one train of cooling, the associated supported Class 1E electrical equipment is declared inoperable
| | BACKGROUND |
| -TSs LCOs 3.8.4, 3.8.7 and 3.8.9 are declared not met due to the inoperable Class 1E electrical equipment
| | * The Class 1E Electrical Equipment A/C System is a support system similar to Component Cooling Water (CCW) System (ISTS 3.7.7) and Service Water System (ISTS 3.7.8) [Essential Service Water System for WCGS and Callaway Plant] |
| -LCO 3.0.3 entered due to no Condition in TS 3.8.7 for two inoperable inverters
| |
| *The Operability Determination process is entered and compensatory measures are established for declaring Class 1E electrical equipment OPERABLE/degraded 11 BACKGROUND
| |
| *The Class 1E Electrical Equipment A/C System is a support system similar to Component Cooling Water (CCW) System (ISTS 3.7.7) and Service Water System (ISTS 3.7.8) [Essential Service Water System for WCGS and Callaway Plant]
| |
| These two systems screened in under Criterion 3 as a support system to various systems which are assumed to function to mitigate various DBAs. | | These two systems screened in under Criterion 3 as a support system to various systems which are assumed to function to mitigate various DBAs. |
| 12 BACKGROUND | | 12 |
| *Satisfies Criterion 3 in 10 CFR 50.36(c)(2)(ii)
| | |
| -"A structure, system, or component that is part of the primary success path and which functions or actuates to mitigate a Design Basis Accident or Transient that either assumes the failure of or presents a challenge to the integrity of a fission product barrier." -Discussion of Criterion 3 in NRC Final Policy Statement on TS Improvements states, in part:
| | BACKGROUND |
| "It is the intent of this criterion to capture into Technical Specifications only those structures, systems, and components that are part of the primary success path of a safety sequence analysis. Also captured by this criterion are those support and actuation systems that are necessary for items in the primary success path to successfully
| | * Satisfies Criterion 3 in 10 CFR 50.36(c)(2)(ii) |
| | - A structure, system, or component that is part of the primary success path and which functions or actuates to mitigate a Design Basis Accident or Transient that either assumes the failure of or presents a challenge to the integrity of a fission product barrier. |
| | - Discussion of Criterion 3 in NRC Final Policy Statement on TS Improvements states, in part: |
| | It is the intent of this criterion to capture into Technical Specifications only those structures, systems, and components that are part of the primary success path of a safety sequence analysis. Also captured by this criterion are those support and actuation systems that are necessary for items in the primary success path to successfully function. [emphasis added] |
| | 13 |
| | |
| | PROPOSED TECHNICAL SPECIFICATION 14 |
| | |
| | PROPOSED TECHNICAL SPECIFICATION 15 |
| | |
| | PROPOSED TECHNICAL SPECIFICATION |
| | * Approval of TS |
| | - Allows use of TS Conditions/Required Actions and associated Completion Times in lieu of Operability Determination (OD) Process or entry into LCO 3.0.3 for a loss of one train of cooling |
| | - Minimizes challenges to plant systems and to the operators, and will facilitate preventive maintenance activities 16 |
| | |
| | EVALUATION BASIS |
| | * GOTHIC Calculation (Temperature Analysis) |
| | - GOTHIC model developed |
| | - Evaluates capability of one cooling train to supply adequate area cooling for both trains of electrical equipment with mitigating actions |
| | - Calculation assumes loss of one cooling train, LOCA heat loads, and an initial room temperature of 80ºF |
| | - Calculation assumes an acceptance value of 104°F room temperature based on the accident/faulted environmental conditions 17 |
| | |
| | EVALUATION BASIS |
| | * Calculation Sensitivity Case Results |
| | - Room temperatures remain less than 104ºF for 30-day duration |
| | * Mitigating Actions (TS 3.7.20, Required Action A.1) |
| | - Start single train of recirculating fans corresponding with OPERABLE cooling train 18 |
|
| |
|
| function." [emphasis added
| | PLANNED MODIFICATIONS |
| ] 13 PROPOSED TECHNICAL SPECIFICATION 14 PROPOSED TECHNICAL SPECIFICATION 15 PROPOSED TECHNICAL SPECIFICATION
| | * Planned modifications - promote circulation of cool air from one OPERABLE A/C train to maintain temperatures in both trains of electrical equipment rooms |
| *Approval of TS
| | - 2016 Level: |
| -Allows use of TS Conditions/Required Actions and associated Completion Times in lieu of Operability Determination (OD) Process or entry into LCO 3.0.3 for a loss of one train of cooling
| | o One seismically qualified recirculating fan per train powered by Class 1E power ducted across the hallway with fire and control dampers o Installation of fire dampers between rooms |
| -Minimizes challenges to plant systems and to the operators, and will facilitate preventive maintenance activities 16 EVALUATION BASIS *GOTHIC Calculation (Temperature Analysis)
| | - 2000 Level: two seismically qualified recirculating fans per train powered by Class 1E power |
| -GOTHIC model developed
| | - LED lighting in Class 1E electrical equipment rooms for heat load reduction 19 |
| -Evaluates capability of one cooling train to supply adequate area cooling for both trains of electrical equipment with mitigating actions
| |
| -Calculation assumes loss of one cooling train, LOCA heat loads, and an initial room temperature of 80ºF
| |
| -Calculation assumes an acceptance value of 104
| |
| °F room temperature based on the accident/faulted environmental conditions 17 EVALUATION BASIS *Calculation Sensitivity Case Results
| |
| -Room temperatures remain less than 104ºF for 30
| |
| -day duration *Mitigating Actions (TS 3.7.20, Required Action A.1) -Start single train of recirculating fans corresponding with OPERABLE cooling train 18 PLANNED MODIFICATIONS
| |
| *Planned modifications
| |
| - promote circulation of cool air from one OPERABLE A/C train to maintain temperatures in both trains of electrical equipment rooms | |
| -2016 Level:
| |
| oOne seismically qualified recirculating fan per train powered by Class 1E power ducted across the hallway with fire and control dampers oInstallation of fire dampers between rooms
| |
| -2000 Level: two seismically qualified recirculating fans per train powered by Class 1E power
| |
| -LED lighting in Class 1E electrical equipment rooms for heat load
| |
|
| |
|
| reduction 19 PLANNED MODIFICATIONS SGK05A Single Unit Operation
| | PLANNED MODIFICATIONS 20 SGK05A Single Unit Operation - 2016 Level |
| - 2016 Level 20 PLANNED MODIFICATIONS 21 SECURITY-RELATED INFORMATION | |
| - WITHHOLD UNDER 10 CFR 2.390
| |
|
| |
|
| 22 PLANNED MODIFICATIONS SGK05A System Operation
| | PLANNED MODIFICATIONS SECURITY-RELATED INFORMATION - WITHHOLD UNDER 10 CFR 2.390 21 |
| - 2000 Level | |
|
| |
|
| 23 PLANNED MODIFICATIONS SECURITY-RELATED INFORMATION
| | PLANNED MODIFICATIONS SGK05A System Operation - 2000 Level 22 |
| - WITHHOLD UNDER 10 CFR 2.390 | | |
| | PLANNED MODIFICATIONS SECURITY-RELATED INFORMATION - WITHHOLD UNDER 10 CFR 2.390 23 |
|
| |
|
| PLANNED MODIFICATIONS | | PLANNED MODIFICATIONS |
| *Operator Actions
| | * Operator Actions |
| -Operator Actions would be taken in the Emergency Operating Procedures (EMGs) to shed specified loads IF a DBA (LOCA) were to occur during single A/C train mode of operation
| | - Operator Actions would be taken in the Emergency Operating Procedures (EMGs) to shed specified loads IF a DBA (LOCA) were to occur during single A/C train mode of operation |
| -IF an A/C train were to fail subsequent to a DBA (LOCA), then plant operators would continue plant shutdown/cooldown utilizing the OPERABLE A/C train 24 PRECEDENT *Farley Nuclear Plant Amendment 176/169 dated June 27, 2008: The NRC approved non
| | - IF an A/C train were to fail subsequent to a DBA (LOCA), then plant operators would continue plant shutdown/cooldown utilizing the OPERABLE A/C train 24 |
| -STS LCO 3.7.19, "Engineered Safety Feature (ESF) Room Coolers." The NRC Safety Evaluation cited Vogtle Electric Generating Plant TS 3.7.14, "Engineered Safety Features (ESF) Room Cooler and Safety Related Chiller System." | | |
| -The NRC acknowledged in the Safety Evaluation (Section 3.0) the use of procedural actions taken upon declaring the LCO not met and entry into the applicable Condition/Required Action to assure the compensatory measure is taken 25 PLANNED SCHEDULE
| | PRECEDENT |
| *Submit simultaneous License Amendment Requests before end of December 2016
| | * Farley Nuclear Plant Amendment 176/169 dated June 27, 2008: The NRC approved non-STS LCO 3.7.19, Engineered Safety Feature (ESF) Room Coolers. The NRC Safety Evaluation cited Vogtle Electric Generating Plant TS 3.7.14, Engineered Safety Features (ESF) Room Cooler and Safety Related Chiller System. |
| *Planned modifications will be implemented online and during refueling outages
| | - The NRC acknowledged in the Safety Evaluation (Section 3.0) the use of procedural actions taken upon declaring the LCO not met and entry into the applicable Condition/Required Action to assure the compensatory measure is taken 25 |
| - Spring 2018 (WCGS) and Fall 2017 (Callaway Plant) | | |
| *Approval of LARs requested by March 2018 26
| | PLANNED SCHEDULE |
| | * Submit simultaneous License Amendment Requests before end of December 2016 |
| | * Planned modifications will be implemented online and during refueling outages - Spring 2018 (WCGS) and Fall 2017 (Callaway Plant) |
| | * Approval of LARs requested by March 2018 26 |
|
| |
|
| ==SUMMARY== | | ==SUMMARY== |
| *Planned modifications ensure one Class 1E electrical equipment A/C train is capable of providing area cooling for both trains of Class 1E electrical equipment with minimal mitigating actions
| | * Planned modifications ensure one Class 1E electrical equipment A/C train is capable of providing area cooling for both trains of Class 1E electrical equipment with minimal mitigating actions |
| *Proposed TS results in use of TS Conditions/Required Actions and associated Completion Times in lieu of Operability Determination (OD) Process or entry into LCO 3.0.3 for a loss of one train of cooling
| | * Proposed TS results in use of TS Conditions/Required Actions and associated Completion Times in lieu of Operability Determination (OD) Process or entry into LCO 3.0.3 for a loss of one train of cooling |
| *Proposed TS and planned modifications will minimize challenges to plant systems and to the operators, and will facilitate preventive maintenance activities 27 QUESTIONS
| | * Proposed TS and planned modifications will minimize challenges to plant systems and to the operators, and will facilitate preventive maintenance activities 27 |
|
| |
|
| QUESTIONS ?}} | | QUESTIONS QUESTIONS ?}} |
Letter Sequence Meeting |
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2024-06-28
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CALLAWAY PLANT WOLF CREEK GENERATING STATION Class 1E Electrical Equipment Air Conditioning (A/C) System Pre-Application Meeting August 25, 2016
AGENDA
- Class 1E Electrical Equipment A/C System Description
- Proposed Technical Specification (TS)
PURPOSE
- A loss of a Class 1E electrical equipment A/C train requires the associated electrical TS LCOs to be declared not met, which requires entry into LCO 3.0.3
- License amendment request to incorporate the Class 1E Electrical Equipment A/C System into the TS
- Planned modifications developed for either (i.e., one)
A/C train to cool both trains of electrical equipment
- Will minimize challenges to plant systems and to the operators, and will facilitate preventive maintenance activities 3
CLASS 1E ELECTRICAL EQUIPMENT A/C SYSTEM DESCRIPTION
- Design basis function is to provide a suitable atmosphere for the Class 1E electrical equipment during all modes of plant operation, including loss of preferred power and post-accident operation
- System is safety related and required to function following a DBA to cool components required to achieve and maintain the plant in a post-accident safe shutdown condition
- Two independent trains operated in continuous recirculation mode maintain room temperatures 90ºF for normal maximum steady state environmental conditions
- One train (with implementation of mitigating actions) will maintain room temperatures 104°F for maximum accident/faulted environmental conditions 4
CLASS 1E ELECTRICAL EQUIPMENT A/C SYSTEM DESCRIPTION
- Equipment Description Cooling Capacity: 30 tons o One train capable of cooling both trains of electrical equipment rooms Direct expansion refrigeration circuit with evaporator coils in air handling unit Heat rejected through condenser to Essential Service Water System Recirculation only - no outside air capabilities 5
CLASS 1E ELECTRICAL EQUIPMENT A/C SYSTEM DESCRIPTION 2016 Level 6
CLASS 1E ELECTRICAL EQUIPMENT A/C SYSTEM DESCRIPTION SECURITY-RELATED INFORMATION - WITHHOLD UNDER 10 CFR 2.390 7
CLASS 1E ELECTRICAL EQUIPMENT A/C SYSTEM DESCRIPTION 2000 Level 8
CLASS 1E ELECTRICAL EQUIPMENT A/C SYSTEM DESCRIPTION SECURITY-RELATED INFORMATION - WITHHOLD UNDER 10 CFR 2.390 9
BACKGROUND
- Operational issues identified for a loss of one train of cooling
- TS 1.1 Definition of OPERABLE-OPERABILITY
- Application of LCO 3.0.6
- Single failure criterion
- Class 1E electrical equipment A/C trains support the DC Sources, Inverters, and Distribution Systems
- Not addressed in TSs or TS Bases 10
BACKGROUND
- On loss of one train of cooling, the associated supported Class 1E electrical equipment is declared inoperable
- TSs LCOs 3.8.4, 3.8.7 and 3.8.9 are declared not met due to the inoperable Class 1E electrical equipment
- LCO 3.0.3 entered due to no Condition in TS 3.8.7 for two inoperable inverters
- The Operability Determination process is entered and compensatory measures are established for declaring Class 1E electrical equipment OPERABLE/degraded 11
BACKGROUND
These two systems screened in under Criterion 3 as a support system to various systems which are assumed to function to mitigate various DBAs.
12
BACKGROUND
- A structure, system, or component that is part of the primary success path and which functions or actuates to mitigate a Design Basis Accident or Transient that either assumes the failure of or presents a challenge to the integrity of a fission product barrier.
- Discussion of Criterion 3 in NRC Final Policy Statement on TS Improvements states, in part:
It is the intent of this criterion to capture into Technical Specifications only those structures, systems, and components that are part of the primary success path of a safety sequence analysis. Also captured by this criterion are those support and actuation systems that are necessary for items in the primary success path to successfully function. [emphasis added]
13
PROPOSED TECHNICAL SPECIFICATION 14
PROPOSED TECHNICAL SPECIFICATION 15
PROPOSED TECHNICAL SPECIFICATION
- Allows use of TS Conditions/Required Actions and associated Completion Times in lieu of Operability Determination (OD) Process or entry into LCO 3.0.3 for a loss of one train of cooling
- Minimizes challenges to plant systems and to the operators, and will facilitate preventive maintenance activities 16
EVALUATION BASIS
- GOTHIC Calculation (Temperature Analysis)
- GOTHIC model developed
- Evaluates capability of one cooling train to supply adequate area cooling for both trains of electrical equipment with mitigating actions
- Calculation assumes loss of one cooling train, LOCA heat loads, and an initial room temperature of 80ºF
- Calculation assumes an acceptance value of 104°F room temperature based on the accident/faulted environmental conditions 17
EVALUATION BASIS
- Calculation Sensitivity Case Results
- Room temperatures remain less than 104ºF for 30-day duration
- Mitigating Actions (TS 3.7.20, Required Action A.1)
- Start single train of recirculating fans corresponding with OPERABLE cooling train 18
PLANNED MODIFICATIONS
- Planned modifications - promote circulation of cool air from one OPERABLE A/C train to maintain temperatures in both trains of electrical equipment rooms
- 2016 Level:
o One seismically qualified recirculating fan per train powered by Class 1E power ducted across the hallway with fire and control dampers o Installation of fire dampers between rooms
- 2000 Level: two seismically qualified recirculating fans per train powered by Class 1E power
- LED lighting in Class 1E electrical equipment rooms for heat load reduction 19
PLANNED MODIFICATIONS 20 SGK05A Single Unit Operation - 2016 Level
PLANNED MODIFICATIONS SECURITY-RELATED INFORMATION - WITHHOLD UNDER 10 CFR 2.390 21
PLANNED MODIFICATIONS SGK05A System Operation - 2000 Level 22
PLANNED MODIFICATIONS SECURITY-RELATED INFORMATION - WITHHOLD UNDER 10 CFR 2.390 23
PLANNED MODIFICATIONS
- Operator Actions would be taken in the Emergency Operating Procedures (EMGs) to shed specified loads IF a DBA (LOCA) were to occur during single A/C train mode of operation
- IF an A/C train were to fail subsequent to a DBA (LOCA), then plant operators would continue plant shutdown/cooldown utilizing the OPERABLE A/C train 24
PRECEDENT
- Farley Nuclear Plant Amendment 176/169 dated June 27, 2008: The NRC approved non-STS LCO 3.7.19, Engineered Safety Feature (ESF) Room Coolers. The NRC Safety Evaluation cited Vogtle Electric Generating Plant TS 3.7.14, Engineered Safety Features (ESF) Room Cooler and Safety Related Chiller System.
- The NRC acknowledged in the Safety Evaluation (Section 3.0) the use of procedural actions taken upon declaring the LCO not met and entry into the applicable Condition/Required Action to assure the compensatory measure is taken 25
PLANNED SCHEDULE
- Submit simultaneous License Amendment Requests before end of December 2016
- Planned modifications will be implemented online and during refueling outages - Spring 2018 (WCGS) and Fall 2017 (Callaway Plant)
- Approval of LARs requested by March 2018 26
SUMMARY
- Planned modifications ensure one Class 1E electrical equipment A/C train is capable of providing area cooling for both trains of Class 1E electrical equipment with minimal mitigating actions
- Proposed TS results in use of TS Conditions/Required Actions and associated Completion Times in lieu of Operability Determination (OD) Process or entry into LCO 3.0.3 for a loss of one train of cooling
- Proposed TS and planned modifications will minimize challenges to plant systems and to the operators, and will facilitate preventive maintenance activities 27
QUESTIONS QUESTIONS ?
