ML090910729
| ML090910729 | |
| Person / Time | |
|---|---|
| Site: | Crystal River  |
| Issue date: | 04/01/2009 |
| From: | Progress Energy Co |
| To: | Plant Licensing Branch II |
| Saba F, NRR/DORL/LPL2-2, 301-415-1447 | |
| References | |
| Download: ML090910729 (30) | |
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i; Overview
Background
EPU submittal approach EPU technical issues Linked or related licensing actions Schedule Path forward
" Progress Energy
II CR3 Background CR3 is a "B&W 177 Fuel Assembly" NSSS Plant Babcock and Wilcox (now AREVA) was NSSS Supplier Gilbert Commonwealth (Worley Parsons) was the AlE Key Features Pressurized Water Reactor Large Dry Containment Once-Through Steam Generators Integrated Control System Constant RCS Tavg @ Power Progress Energy
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CR3 EPU Background CR3 has studied and implemented power uprates over the years of its operation:
2452 MWt original Rated Thermal Power (RTP) 2544 MWt in the early 19808 2568 MWt in the late 19908 Major Power Uprate Project Started Late in 2006.
Three Phases:
2007/15R 2609 MWt 912 MWe MUR 2009/16R 2609 MWt 940 MWe BOP Eft 2011/17R 3014 MWt 1080 MWe EPU Progress Energy
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0lI CR3 EPU Background PU Modification Scopes Measurement Uncertainty Recapture (15R)
Leading Edge Flow Meter Improved Main Steam Temperature and Flow Instruments BOP Efficiency (16R)
Low Pressure Turbines and Main Generator Moisture Separator Regenerative Heat Exchanger Support Systems (secondary cooling, Iso-Phase Bus Duct Cooling, etc)
Various Heat Exchangers Progress Energy
CR3 EPU Background EPU Modification Scope (17R)
High Pressure Turbine Condensate Pumps ADV Enhancements LPI Cross-Tie/Hot Leg Injection Various Pumps and Motors Primary Contractors for EPU AREVA Fuels, Safety Analysis and Licensing AREVAlParsons BOP Engineering Siemens Turbine-Generator
~ Progress Energy
ilIf CR3 EPU Background CR3 EPU 3014 MWt Davis Besse (current w/MUR) 2817 MWt CR3 (current w/MUR) 2609 MWt CR3 EPU is a 15% increase above current rated thermal power; but, only 70/0 above B&W fleet experience.
~ Progress Energy
CR3 EPU NRC Meetings Original Kick-Off Meeting MUR LAR Submittal MUR NRC Approval EPU Update Meeting Today's Meeting April 23, 2007 April 25, 2007 December 26,2007 May 19, 2008 April 1, 2009
~ Progress Energy
EPU Submittal Approach Format and Content Consistent with RS-001 using Ginna as model Consistent with draft NEI Guidance (NEI 08-10)
Progress Energy is conducting extensive review of other EPU OE to optimize EPU LAR completeness and quality (RAls, etc),
Draft LAR content being reviewed by AREVA and EPU licensing staff Final LAR content will be re-reviewed by engineering (EPU staff, systems, programs and/or design)
Establishing independent Expert Panel for supplemental review
~ Progress Energy
EPU Submittal Approach Environmental Report Conducted benchmark visit to Browns Ferry. Format consistent with Browns Ferry and Susquehanna.
Utilized existing reports to the extent possible Used License Renewal ER content and contractor Used State approved Site Certification content Added or modified only those areas not previously addressed or which changed (i.e., CW flow increase assumed in Site Certification - no longer required).
Draft complete - no surprises.
~ Progress Energy
EPU Technical Details Follow-up on aspects discussed in prior meetings Address emergent issues Some require explicit NRC actions others are simply reviewed for transparency and completeness Basis for inclusion will be discussed for each
~ Progress Energy
EPU Technical Details Low Pressure Injection (LPn system cross-tie modification is necessary to mitigate core trood line break with concurrent limiting single failure.
LPI cross-tie significantly improves core flood line break performance in a manner consistent with some of our peers.
Modificatic;>n adds Hot Leg Injection flowpath from common line.
Hot Leg Injection replaces currently licensed active Boron Precipitation mitigation sub-systems.
Makes mitigation single-failure proof Reduces operator burden See Schematics that follow.
~ Progress Energy
LPI Cross Tie Conceptual Design CFT-1B DH-1-'FE1 CFV-5 CFV-2 CFV-1
~Break RX VESSEL DHV-501 (NEW)
DHV-500 (NEW)
DHV-8 DHV-7 DHV-383/4 (NEW) ~
DHV-510
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DHV-610
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DHHE-1B (NEW) il/1t1t1t1t1~ NL---1 !I DH-1B-FO DH-1-FE2 (NEW)
OUTSIDE INSIDE RB RB
~ Progress Energy
Hot Leg Injection Conceptual Design "U
DHV-500
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DHV-369/390 DHV-367/6 (NEW)
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RB ZDHV-501 (NEW)
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L v*. DHV-601 CFV-6
~Break DHV-1 CFV-1
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.......... DHV-363/4 (NEW) I I
DHV-600 DHV-2 (NEW)
CFV-2 INSIDE CFV-5 RB
~ Progress Energy
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- 0 EPU Technical Details Enhanced secondary depressurization is necessary to meet SBLOCA QQjectives at EPU conditions. It is not needed for Appendix K compliance; but, to avoid long post accident operation at elevated temperatures.
Increasing size of Atmospheric Dump Valves (ADVs)
Making ADVs safety-related Coupled with existing, simple, related manual action Open ADVs on Loss of Sub-cooling Margin Concurrent (same control switch) with raising target SG levels
~ Progress Energy
EPU LAR Technical Details Margin Management CR3 continues to be committed to an extensive margin management program Consistent with INPO Best Practice 09-003 "Excellence in the Management of Design and Operating Margins" Consistent with NEI 08-10 "Roadmap for Power Uprate Program Development and Implementation" (currently a draft)
Regular updates to our Plant Nuclear Safety and Nuclear Safety Review Committees Details to be captured in appropriate Engineering Change packages To be validated by testing where appropriate
~ Progress Energy
EPU LAR Technical Details Operational and Post Modification Testing CR3 committed to thorough power ascension and testing program CR3 developing comprehensive margin management program including appropriate testing to confirm operational margin CR3 developing extensive vibration monitoring program
~ Progress Energy
EPU LAR Technical Details Large Transient Testing CR3 has recognized the need and is thoroughly assessing the impact of the EPU on original CR3 Hot Functional Testing as required by the Standard Review Plan and RS 001 CR3 is evaluating modeling options (transient codes, simulator, etc.) to support testing needs determination.
CR3 is evaluating appropriate large transient test scope based on other utility operating experience CR3 plans to schedule additional discussions on this subject prior to submittal.
~ Progress Energy
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EPU LAR Technical Details Dose Related Aspects Application of Alternate Source Term to CR3 was approved September 17,2001 Meteorological data has been updated to support current X/Q values Accident dose calculations completed Site Boundary Control Room/TSC On-site doses being updated Input to EQ evaluations and calculations Input to 'Mission Dose' calculations MAX SAFE Progress Energy
EPU LAR Technical Details Environmental Qualification Evaluation Underway Preliminary Reactor and Intermediate Building Pressure/Temperature profiles and preliminary dose conditions complete Temperature and pressure inputs will be finalized prior to submittal LAR will include confirmation of future work to demonstrate qualification (i.e. list SSCs that may require modification or changes in replacement schedule).
All calculation and qualification files will be updated as part of EPU implementation.
" Progress Energy
EPU LAR Technical Details Grid Stability Analysis completed in 2007 Submitted, reviewed and approved as part of MUR LAR (NRC review limited to MUR case)
Included three phases MUR Impacts EPU Impacts Levy Impacts Noted switchyard and transmission modifications necessary to support new build (Levy) not EPU
~ Progress Energy
EPU LAR Technical Details LOCA Status As noted by NRC, inputs to support of NRC confirmatory calculations were based on existing Analysis of Record (Le., MUR conditions not yet EPU)
The full spectrum of all accident and transient analyses necessary to support EPU are complete One substantive aspect of SBLOCA remains not fully resolved (EFW wetting).
~ Progress Energy
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EPU LAR Technical Details EFW Wetting Another B&W NSSS plant recentl~ filed 10 CFR 50.46 report to the NRC due to a greater than 50F PCT increase for SBlOCA (102F).
AREVA notified CR3 that it will be apglicable to CR3 after Steam Generator Replacement in 16R. There are differences in the designs Similar - There is a gap between shroud and EFW entry Tube Support Plate Dissimilar - CR3 pesign includes a 'gap filler bar' that reduces gap and encourages pooling BWC conducted EFW flow distribution testing last week. The results were encouraging.
AREVA will revise CR3 SBLOCA analysis for 16R and 17R configurations.
~ Progress Energy
EFW Wetting (CR3)
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Drilled Holes
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- rows wetted at 1jATSP as evidencedbywater rivulets
~ThOO Broached ~ cross-section Holes
~ Progress Energy
Linked Licensing Action LAR #307 Rod Ejection Accident (REA) Analysis Methodology The proposed methodology is the same as that in ANP-10286P which is the Topical Report addressing REA Methods for the US EPR.
The AREVA REA analysis methodology has been demonstrated to be applicable to CR-3 through the evaluation of a bounding sample problem Knowledge gained from the NRC review of the EPR Topical should facilitate review of the CR3 LAR
~ Progress Energy
Linked or Related Licensing Action LAR 310 adopts TSTF-490 "Deletion of E Bar Definition and Revision to RCS Specific Activity Technical Specification" A primary objective of TSTF-490 is to replace E Bar with Dose Equivalent Xe-133 (DEX) because DEX provides a better indicator of failed fuel conditions NRC review more complicated than CLIIP presumed since related dose calcu:lations are not yet reviewed and approved CR3 and NRC are determining best path forward
~ Progress Energy
Related Licensing Action Set-point Methodology EPU LAR will include changes to ITS Setpoints Revision 4 of TSTF-493 to be sent to the NRC this Spring CLIIP should be available Fall, 2009 CR-3 will commit to adopt one of options in the CLIIP
~ Progress Energy
EPU LAR Schedule June 30,2009 conservatively chosen at project inception Recent discussions with NRC indicate to Progress Energy that later date is more appropriate.
Additional time can be constructively used by PE EPU LAR will be submitted by September 25, 2009 EPU Amendment is requested by October 1, 2010 to meet 17R EC issuance milestone in support of effective work planning.
~ Progress Energy
Closing Thoughts Modifications primarily to the secondary-side of plant and installed in well-managed increments MUR related changes in 15R (LEFM and others)
Efficiency improvements in 16R Final modifications in 17R Strong commitment to effective project management Strong commitment to effective communications Strong commitment to use of Operating Experience
~ Progress Energy
Comments/Questions?
What did we not address that the NRC wants to hear more about?
What can we do to facilitate your reviews going forward?
We have identified the need to further discuss large transient testing with the staff prior to EPU submittal AREVA and we remain committed to support a safety analysis workshop at an appropriate time frame.
~ Progress Energy