ML072010174
| ML072010174 | |
| Person / Time | |
|---|---|
| Site: | Comanche Peak  |
| Issue date: | 05/23/2007 |
| From: | TXU Generation Co, LP |
| To: | Office of Nuclear Reactor Regulation |
| Thadani, M C, NRR/DORL/LP4, 415-1476 | |
| Shared Package | |
| ML072050495 | List: |
| References | |
| Download: ML072010174 (11) | |
Text
Enclosure 2
Comanche Peak SES Transition to Westinghouse Safety Analysis Methodologies
/
TXU Power May 23, 2007
5/22/2007 CPSES Stretch Power Uprate 4TXU Power Purpose of meeting is to inform the NRC of our plans & schedule to facilitate resource allocation by the NRC CPSES Stretch Power Uprate OeTXU W*P"Power Meeting Agenda
- CPSES Uprate History
- Project team
- Project objectives, milestones & overview
- NSSS analyses
- BOP analyses
" Plant modifications
" Testing
" Submittal format
" Active & planned licensing submittals
" Summary and Q&A 2
5/22/2007 Methodology Transition Project - What and 0?%TXU W ?Power Why?
Prior to 2006:
- TXU Power's Core Design & Safety Analysis organizations performed FSAR Chapter 4, 6, 7 and 15 analyses in-house, using vendor-independent methods May of 2006:
" TXU Power transferred in-house Core Design & Safety Analysis and Risk
& Reliability functions to Westinghouse Electric Co.
" Teaming arrangement developed, where Westinghouse performs these functions in the best interests of Comanche Peak
" Agreement includes application of latest NRC-approved Westinghouse analysis methodologies' Allows power uprates, longer cycles, more efficient core designs, newer technologies for more efficient plant operation Agenda IVh TXU Power
" Purpose of today's discussions
" Overview of the Accident Analysis Methodology Transition Project
.° Specifics of Technical Specification Changes Generic, enabling changes Submitted for NRC review April 10, 2007 Conforming changes Submitted for NRC review April 10, 2007 Cycle Specific Applications To be submitted upon completion of analyses
. Licensing Action Submittal Schedules
- Concluding discussions 3
5/22/2007 Project Objectives ISTXU Power
" Increase Rated Thermal Power from 3458 to 3612 MWt (-4.5%)
- increase plant output
- Unit 1 49 MWe
- Unit 2 37 MWe
- Design and operating margin will be protected to assure continued safe and reliable plant operation
- Modifications
- Analyses Project Milestones A
PTXU v* Power
- August 2007 - LAR submittal to NRC (Units 1 & 2)
" Fall 2008 Outage - Unit I uprate implementation
- Fall 2009 Outage - Unit 2 uprate implementation NRC approval of proposed Uprate LAR requested to support the Fail 2008 Unit I outage 4
5/22/2007 Methodology Transition Project Overview 4Vt TXU Power
-All adopted Westinghouse methodologies have been previously approved by the NRC on a generic basis for application at plants such as Comanche Peak Required'Tech Spec Changes - enabling eto TXU changes
- Tech Spec 5.6.5b, "Core Operating Limits"
-List of Methodologies used to establish Core Operating Limits expanded to include standard Westinghouse Methodologies
" WCAP-1 1397-P-A, "Revised Thermal Design Procedure," April 1989.
" WCAP-8745-P-A, "Design Bases for the Thermal Overpower AT and Thermal Overtemperature AT Trip Functions," September 1986.
- Applicable to Comanche Peak's N-1 6-based OT/OP system
" WCAP-14565-P-A, "VIPRE-01 Modeling and Qualification for Pressurized Water Reactor Non-LOCA Thermal-Hydraulic Safety Analysis," October 1999.
- WCAP-12472-P-A, "BEACON Core Monitoring and Operations Support System," August 1994.
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5/22/2007 NSSS Analyses - continued AVhTXU Power
" Component Evaluations
- System Evaluations
- Safety analyses include:
- LOCA M&E / containment
- SLB M&E I containment
- Spent fuel pool criticality
- Non-LOCA analyses
- LB BELOCA w/ASTRUM (1)
- SBLOCA (1)
(1)Addressed in Transition to Westinghouse Methodologies NSSS Uprate Modifications TXU S Power Nuclear Steam Supply System (NSSS)
NSSS Control System changes
- Steam Dump Control System
- Rod Control System
- SG Level Control System
- Pressurizer Water Level Control System 6
5/22/2007 Required Tech Spec Changes - conforming e& TXU Power changes
,BEACON-TSM
" Replace the phrase "moveable incore detectors" to "core power distribution measurement information"
" Replace the phrase 'flux map" to "power distribution measurements"
- Affects:
- TS.3.1.7, "Rod Position Indication"
- TS 3.2.1, "Heat Flux Hot Channel Factor"
- TS 3.2.2, "Nuclear Enthalpy Rise Hot Channel Factor"
- TS 3.2.4, "Quadrant Power Tilt Ratio"
- TS 3.3.1, "Reactor Trip System (RTS) Instrumentation."
Required Tech Spec Changes - cycle-specific 41 TXU applications Power
-Tech Spec changes identified as cycle-specific analyses are completed
-Cycle-specific analyses are performed to bound operation at current Rated Thermal Power as well as planned uprated power
- Current Rated Thermal Power = 3458 MWth
- Planned Rated Thermal Power = 3612 MWth
- Permission to operate at uprated power is NOT part of this project 7
5/22/2007 Power Ascension Testing 4
TXU Power
- Plant transient testing under evaluation
- NSSS & BOP systems - monitoring during uprate power ascension
- Flow-induced vibration monitoring of the following systems Main Steam, Feedwater (outside of containment)
Condensate I Heater Drains Extraction Steam
" Post-Modification Testing, including Heater Drain pump I system Isophase bus duct cooling
- Turbine Thermal Performance Testing Submittal Format & Content 4TXU Power
- Recent NRC RAIs addressed
- Current licensing basis summarized
- Uses Westinghouse, Shaw, & Siemens uprate experience 8
5/22/2007 Schedules Mid-April 2008 TXU Power First application of Westinghouse methodologies to Unit 2 Cycle 11 NRC Approval Requested 2/15/08 Supporting Milestones:
April 2007 Submitted Enabling & Conforming Tech Spec changes July 2007 Submit SBLOCA & ASTRUM Evaluation Models September 2007 Submit cycle-specific Tech Spec changes required to support methodology transition RTS & ESFAS Allowable Values affected functions only Pressurizer. Safety Valve set pressure and as-found tolerance General Discussion 4ATXU Power Any Comments or Questions?
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5/22/2007 Summary Aft TXU Power
°CPSES SPU will result in -4.5% increase in RTP
-Dedicated, experienced project team
-Similar approach to other recent Westinghouse 4 loop SPU projects
-Design and operating margin will be protected to assure continued safe and reliable plant operation
- RS-001 EPU standard used to facilitate NRC review Summary A TXU Power Project Milestones
-August 2007 - LAR submittal to NRC (Units 1 & 2)
-Fall 2008 Outage - Unit I uprate implementation
-Fall 2009 Outage - Unit 2 uprate implementation NRC approval of proposed Uprate LAR requested to support the Fall 2008 Unit I outage Questions?
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