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| docket = 05000259, 05000260, 05000296
| docket = 05000259, 05000260, 05000296
| license number = DPR-033, DPR-052, DPR-068
| license number = DPR-033, DPR-052, DPR-068
| contact person = Saba F E DORL/LPL2-2 301-415-1447
| contact person = Saba F DORL/LPL2-2 301-415-1447
| package number = ML15099A304
| package number = ML15099A304
| document type = Meeting Briefing Package/Handouts, Slides and Viewgraphs
| document type = Meeting Briefing Package/Handouts, Slides and Viewgraphs
Line 16: Line 16:


=Text=
=Text=
{{#Wiki_filter:ENCLOSURE 2 GE Letter No. 175528
{{#Wiki_filter:ENCLOSURE 2 GE Letter No. 175528-011 GEH Slides for TVA Presentation to the NRC in Support of Steam Dryer Replacement Non-Proprietary Information NON-PROPRIETARY NOTICE This is a non-proprietary version of Enclosure 1 of GEH Letter No. 175528-011 which has the proprietary information removed. Portions of the document that have been removed are indicated by an open and closed bracket as shown here ((        )).
-011 GEH Slides for TVA Presentation to the NRC in Support of Steam Dryer Replacement Non-Proprietary Information  


NON-PROPRIETARY NOTICE This is a non
Non-Proprietary Information - Class I (Public)
-proprietary version of Enclosure 1 of GE H Letter N o. 175528-011 which has the proprietary information removed.
Browns Ferry Nuclear Plant Replacement Steam Dryers Gerry Doyle Director EPU April 22, 2015
Portions of the document that have been removed are indicated by an open and closed bracket as shown here [[
              ]].
Browns Ferry Nuclear Plant Replacement Steam Dryers Gerry Doyle Director EPU April 22, 2015 Non-Proprietary Information
- Class I (Public)


Agenda l  2 *Introductions
Non-Proprietary Information - Class I (Public)
*Overview and Background
Agenda
*Browns Ferry Replacement Steam Dryer Design *Browns Ferry Replacement Steam Dryer Analysis *Browns Ferry Replacement Steam Dryer Power Ascension Monitoring
* Introductions                                                 G. Doyle
*Browns Ferry Replacement Steam Dryer Inspection Plan
* Overview and Background                                       G. Doyle
*Questions/Comments G. Doyle G. Doyle P. Donahue P. Donahue P. Donahue  P. Donahue G. Doyle Non-Proprietary Information
* Browns Ferry Replacement Steam Dryer                           P. Donahue Design
- Class I (Public)
* Browns Ferry Replacement Steam Dryer                           P. Donahue Analysis
* Browns Ferry Replacement Steam Dryer                           P. Donahue Power Ascension Monitoring
* Browns Ferry Replacement Steam Dryer                           P. Donahue Inspection Plan
* Questions/Comments                                             G. Doyle l 2


Overview and Background l  3 *New Replacement Steam Dryers (RSDs) will be installed in all three Browns Ferry Units
Non-Proprietary Information - Class I (Public)
*To resolve any issues that existing steam dryers may have under EPU conditions
Overview and Background
*Previous submittals, now withdrawn, had over 260 RAIs associated with steam dryers *New EPU License Amendment Request (LAR) submittal will address previous issues , look to minimize RAIs, and support NRC approval
* New Replacement Steam Dryers (RSDs) will be installed in all three Browns Ferry Units
*Current strategy and design complies with existing and contemporary regulatory requirements
* To resolve any issues that existing steam dryers may have under EPU conditions
*Contracted with GEH to build our RSDs as they are the Original Equipment Manufacturer and have experience in other recent RSDs
* Previous submittals, now withdrawn, had over 260 RAIs associated with steam dryers
*We are here to present an overview of our RSDs design, analysis, monitoring plan and inspection plan with an expectation that NRC fully understands the RSD information we plan to submit as part of our EPU LAR
* New EPU License Amendment Request (LAR) submittal will address previous issues , look to minimize RAIs, and support NRC approval
*Presenter is Pete Donahue, Senior Manager for EPU Engineering
* Current strategy and design complies with existing and contemporary regulatory requirements
*Supported by GEH personnel Non-Proprietary Information
* Contracted with GEH to build our RSDs as they are the Original Equipment Manufacturer and have experience in other recent RSDs
- Class I (Public)
* We are here to present an overview of our RSDs design, analysis, monitoring plan and inspection plan with an expectation that NRC fully understands the RSD information we plan to submit as part of our EPU LAR
* Presenter is Pete Donahue, Senior Manager for EPU Engineering
* Supported by GEH personnel l 3


BFN Replacement Steam Dryer l  4 *Based on the curved hood six bank prototype replacement dryer first used in a BWR/4 reactor.
Non-Proprietary Information - Class I (Public)
*Design is significantly more robust than the original steam dryer it replaces. *BFN acoustic load definition developed using MSL acoustic pressure measurements taken at the three Browns Ferry units.  
BFN Replacement Steam Dryer
*The FIV fatigue evaluation and primary stress methodologies used for BFN RSD analysis has been reviewed in detail on BWR/6 RSD and ESBWR projects. *Analyzed for the applicable primary structural loads for normal operation and for transient and accident conditions.
* Based on the curved hood six bank prototype replacement dryer first used in a BWR/4 reactor.
Non-Proprietary Information
* Design is significantly more robust than the original steam dryer it replaces.
- Class I (Public)
* BFN acoustic load definition developed using MSL acoustic pressure measurements taken at the three Browns Ferry units.
* The FIV fatigue evaluation and primary stress methodologies used for BFN RSD analysis has been reviewed in detail on BWR/6 RSD and ESBWR projects.
* Analyzed for the applicable primary structural loads for normal operation and for transient and accident conditions.
l 4


Browns Ferry RSD Design
Browns Ferry RSD Design


EPU Replacement Dryer Experience l  6 Successful operating history for replacement dryers at EPU
Non-Proprietary Information - Class I (Public)
*Quad Cities Units 1/2 RSD
EPU Replacement Dryer Experience Successful operating history for replacement dryers at EPU
*Dresden Units 2/3 RSD
* Quad Cities Units 1/2 RSD
*Susquehanna Units 1/2 RSD
* Dresden Units 2/3 RSD
*Grand Gulf RSD
* Susquehanna Units 1/2 RSD
*Vermont Yankee original dryer with modifications Non-Proprietary Information
* Grand Gulf RSD
- Class I (Public)
* Vermont Yankee original dryer with modifications l 6


l  7 Steam Dryer Structural Design Timeline
Non-Proprietary Information - Class I (Public)
[[  ]] Non-Proprietary Information  
Steam Dryer Structural Design Timeline
- Class I (Public)
((
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l  8 Steam Dryer Structural Design Timeline
Non-Proprietary Information - Class I (Public)
[[ Non-Proprietary Information  
Steam Dryer Structural Design Timeline
- Class I (Public)
((
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l  9 Steam Dryer Structural Design Timeline
[[ Non-Proprietary Information
- Class I (Public)
  ]]
BFN Replacement Dryer Design l 10 *Based on the curved hood six bank prototype replacement dryer first used in a BWR/4 reactor.
*Design is significantly more robust than the original steam dryer it replaces.
*Both the Browns Ferry reactor vessel and the BWR/4 reactor vessel where the BWR/4 prototype RSD was installed have the same internal diameter; so in essence,  [[ ]] Non-Proprietary Information
- Class I (Public)


BFN Replacement Dryer Design l  11 *Changes to prototype dryer design
Non-Proprietary Information - Class I (Public)
*Dryer/vessel interface changes *Address OE lessons learned
Steam Dryer Structural Design Timeline
*Stress reduction
((
[[ ]] Non-Proprietary Information  
                                                        )) l 9
- Class I (Public)


BFN Replacement Dryer Design l  12 [[ ]] Non-Proprietary Information  
Non-Proprietary Information - Class I (Public)
- Class I (Public)
BFN Replacement Dryer Design
* Based on the curved hood six bank prototype replacement dryer first used in a BWR/4 reactor.
* Design is significantly more robust than the original steam dryer it replaces.
* Both the Browns Ferry reactor vessel and the BWR/4 reactor vessel where the BWR/4 prototype RSD was installed have the same internal diameter; so in essence,
((
                                                                  ))
l 10


BFN Replacement Dryer Design l  13    ]] [[ Non-Proprietary Information  
Non-Proprietary Information - Class I (Public)
- Class I (Public)
BFN Replacement Dryer Design
((
* Changes to prototype dryer design
* Dryer/vessel interface changes
* Address OE lessons learned
* Stress reduction
                                  ))                                    l 11


BFN RSD Design Improvement l  14 [[ ]] Non-Proprietary Information  
Non-Proprietary Information - Class I (Public)
- Class I (Public)
BFN Replacement Dryer Design
((
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BFN RSD Design Improvement l  15 [[                ]] Non-Proprietary Information  
Non-Proprietary Information - Class I (Public)
- Class I (Public)
BFN Replacement Dryer Design
((
              ))
l 13


BFN RSD Design Improvement l  16 [[                ]] Non-Proprietary Information  
Non-Proprietary Information - Class I (Public)
- Class I (Public)
BFN RSD Design Improvement
((
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BFN RSD Design Refinement l  17 ]] [[ Non-Proprietary Information  
Non-Proprietary Information - Class I (Public)
- Class I (Public)
BFN RSD Design Improvement
((
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BFN RSD Design Refinement l  18 [[ ]] Non-Proprietary Information  
Non-Proprietary Information - Class I (Public)
- Class I (Public)
BFN RSD Design Improvement
((
l 16
                                                          ))


BFN RSD Design Refinement l  19 [[ ]] Non-Proprietary Information  
Non-Proprietary Information - Class I (Public)
- Class I (Public)
BFN RSD Design Refinement
((
                                                          ))
l 17


BFN RSD Design Refinement l  20 [[ ]] Non-Proprietary Information  
Non-Proprietary Information - Class I (Public)
- Class I (Public)
BFN RSD Design Refinement
((
                                                          ))
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BFN RSD Design Refinement l  21 [[ ]] Non-Proprietary Information  
Non-Proprietary Information - Class I (Public)
- Class I (Public)
BFN RSD Design Refinement
((
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BFN RSD Design Refinement l 22 [[ ]] Non-Proprietary Information  
Non-Proprietary Information - Class I (Public)
- Class I (Public)
BFN RSD Design Refinement
((
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l 20
 
Non-Proprietary Information - Class I (Public)
BFN RSD Design Refinement
((
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l 21
 
Non-Proprietary Information - Class I (Public)
BFN RSD Design Refinement
((
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l 22


Browns Ferry RSD Analysis
Browns Ferry RSD Analysis


BFN RSD Analysis Overview l  24                ]] [[ Non-Proprietary Information  
Non-Proprietary Information - Class I (Public)
- Class I (Public)
BFN RSD Analysis Overview
((
l 24
                                                        ))


Browns Ferry RSD Load Definition
Browns Ferry RSD Load Definition


BFN RSD Analysis Load Definition l 26   ]] [[ Non-Proprietary Information  
Non-Proprietary Information - Class I (Public)
- Class I (Public)
BFN RSD Analysis Load Definition
((
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l 26
 
Non-Proprietary Information - Class I (Public)
BFN RSD Analysis Load Definition
((
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BFN RSD Analysis Load Definition l  27    ]] [[ Non-Proprietary Information  
Non-Proprietary Information - Class I (Public)
- Class I (Public)
BFN RSD Analysis Load Definition
((
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BFN RSD Analysis Load Definition l  28 [[                ]] Non-Proprietary Information  
Non-Proprietary Information - Class I (Public)
- Class I (Public)
BFN RSD Analysis Load Definition
((
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BFN RSD Analysis Load Definition l  29 [[                             
Non-Proprietary Information - Class I (Public)
]] Non-Proprietary Information  
Potential SRV Resonance Frequencies
- Class I (Public)
((
                                                          ))
l 30


Potential SRV Resonance Frequencies l  30 [[    ]] Non-Proprietary Information  
Non-Proprietary Information - Class I (Public)
- Class I (Public)
SRV Resonance Fundamental Frequency
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SRV Resonance Fundamental Frequency l  31 [[                               
Non-Proprietary Information - Class I (Public)
]] Non-Proprietary Information  
MSL Acoustic Mode Interaction
- Class I (Public)
((
                                      ))
l 32


MSL Acoustic Mode Interaction l  32 [[    ]] Non-Proprietary Information  
Non-Proprietary Information - Class I (Public)
- Class I (Public)
MSL Acoustic Mode Interaction
((
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l  33 MSL Acoustic Mode Interaction
Non-Proprietary Information - Class I (Public)
                      ]] [[ Non-Proprietary Information  
Postulated SRV Resonances
- Class I (Public)
((
                                                          ))
l 34


Postulated SRV Resonances l  34 [[    ]] Non-Proprietary Information  
Non-Proprietary Information - Class I (Public)
- Class I (Public)
SRV Adders for Design Load Definition
((
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SRV Adders for Design Load Definition l  35                                 
Non-Proprietary Information - Class I (Public)
]] [[ Non-Proprietary Information  
EPU SRV Scale Factor
- Class I (Public)
((
                                                        ))
l 36


EPU SRV Scale Factor l  36 [[    ]] Non-Proprietary Information  
Non-Proprietary Information - Class I (Public)
- Class I (Public)
EPU SRV Scale Factor
((
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EPU SRV Scale Factor l  37                        ]] [[ Non-Proprietary Information  
Non-Proprietary Information - Class I (Public)
- Class I (Public)
BFN RSD Analysis Load Definition
((
                                                          )) l 38


BFN RSD Analysis Load Definition l  38 [[                  ]] Non-Proprietary Information  
Non-Proprietary Information - Class I (Public)
- Class I (Public)
Dryer Load Comparison
((
                                                            ))
l 39


Dryer Load Comparison l  39    ]] [[ Non-Proprietary Information  
Non-Proprietary Information - Class I (Public)
- Class I (Public)
BFN RSD Analysis Load Definition
((
                                                          ))
l 40


BFN RSD Analysis Load Definition l  40 [[    ]] Non-Proprietary Information  
Non-Proprietary Information - Class I (Public)
- Class I (Public)
BFN RSD Analysis Load Definition
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BFN RSD Analysis Load Definition l  41                    ]] [[ Non-Proprietary Information  
Non-Proprietary Information - Class I (Public)
- Class I (Public)
BFN RSD Analysis Load Definition
((
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BFN RSD Analysis Load Definition l  42 [[    ]] Non-Proprietary Information  
Non-Proprietary Information - Class I (Public)
- Class I (Public)
BFN RSD Analysis Load Definition
((
          ))
l 43


BFN RSD Analysis Load Definition l  43 [[    ]] Non-Proprietary Information  
Non-Proprietary Information - Class I (Public)
- Class I (Public)
BFN RSD Analysis Load Definition
((
                                                          )) l 44


BFN RSD Analysis Load Definition l  44                    ]] [[ Non-Proprietary Information  
Non-Proprietary Information - Class I (Public)
- Class I (Public)
BFN RSD Analysis Load Definition
((
          ))
l 45


BFN RSD Analysis Load Definition l  45 [[    ]] Non-Proprietary Information
Browns Ferry RSD FIV Analysis
- Class I (Public)


Browns Ferry RSD FIV Analysis BFN RSD Finite Element Model l  47 [[    ]] Non-Proprietary Information  
Non-Proprietary Information - Class I (Public)
- Class I (Public)
BFN RSD Finite Element Model
((
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l 47


BFN-Specific Design Improvements l  48 [[                ]] Non-Proprietary Information  
Non-Proprietary Information - Class I (Public)
- Class I (Public)
BFN-Specific Design Improvements
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BFN-Specific Design Improvements l  49 [[                ]] Non-Proprietary Information  
Non-Proprietary Information - Class I (Public)
- Class I (Public)
BFN-Specific Design Improvements
((
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BFN-Specific Design Improvements l  50 [[                  ]] Non-Proprietary Information  
Non-Proprietary Information - Class I (Public)
- Class I (Public)
BFN-Specific Design Improvements
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BFN RSD FEM Mesh Convergence l  51 [[                  ]] Non-Proprietary Information  
Non-Proprietary Information - Class I (Public)
- Class I (Public)
BFN RSD FEM Mesh Convergence
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BFN RSD FIV Analysis l  52 [[    ]] Non-Proprietary Information  
Non-Proprietary Information - Class I (Public)
- Class I (Public)
BFN RSD FIV Analysis
((
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BFN RSD FIV Analysis l  53 [[    ]] Non-Proprietary Information  
Non-Proprietary Information - Class I (Public)
- Class I (Public)
BFN RSD FIV Analysis
((
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End to End Bias and Uncertainty l  54 [[    ]] Non-Proprietary Information  
Non-Proprietary Information - Class I (Public)
- Class I (Public)
End to End Bias and Uncertainty
((
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l  55 End to End Bias and Uncertainty
Non-Proprietary Information - Class I (Public)
[[                ]] Non-Proprietary Information  
End to End Bias and Uncertainty
- Class I (Public)
((
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FIV Stress Adjustment l  56 [[    ]] Non-Proprietary Information  
Non-Proprietary Information - Class I (Public)
- Class I (Public)
FIV Stress Adjustment
((
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l 56


FIV Stress Adjustment l  57 [[    ]] Non-Proprietary Information  
Non-Proprietary Information - Class I (Public)
- Class I (Public)
FIV Stress Adjustment
((
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l 57


BFN RSD Fatigue Analysis Results l  58 [[                  ]] Non-Proprietary Information  
Non-Proprietary Information - Class I (Public)
- Class I (Public)
BFN RSD Fatigue Analysis Results
((
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Browns Ferry RSD Primary Stress Evaluation
Browns Ferry RSD Primary Stress Evaluation


BFN RSD Primary Stress Evaluation l  60 *The steam dryer is a non-safety related item and is classified as an Internal Structure as defined in ASME Subsection NG, Paragraph NG
Non-Proprietary Information - Class I (Public)
-1122. *The steam dryer is not an ASME Code component, but
BFN RSD Primary Stress Evaluation
[[                             
* The steam dryer is a non-safety related item and is classified as an Internal Structure as defined in ASME Subsection NG, Paragraph NG-1122.
]] Non-Proprietary Information
* The steam dryer is not an ASME Code component, but ((
- Class I (Public)
                                                                    ))
l 60


l  61  L oa d C a s e Service Conditions Operating C ondi t i o n Load Combination A N o r m al N o r m al O p e r a t ions          [[ B-1 U p s et T urb i n e St o p Va l v e C l o s u r e (A c o u stic L o a d) B-2 U p s et T urb i n e St o p Va l v e C l o s u r e (Fl o w R e v e r sal Load) B-3 U p s et O p e rati n g B a s i s E a r t h q u a ke  B-4 U p s et Upset DP C-1 Emergency Emergency DP D-1 Fa ulted Main Ste a m L i n e B reak Outside Containment p l u s SSE (H i gh Power)   D-2 Fa ulted Main Ste a m L i n e B reak Outside Containment p l u s SSE (H i gh Power) D-3 Fa ulted Main Ste a m L i n e B reak Outside Containment (I n te r l o c k)  D-4 Fa ulted Main Ste a m L i n e B reak Outside Containment (I n te r l o ck or Hot Standby) D-5 Fa ulted Main Ste a m L i n e B reak Outside Containment (Hot Standby)                     ]] BFN RSD Primary Stress Analysis Load Combinations Non-Proprietary Information
Non-Proprietary Information - Class I (Public)
- Class I (Public)
Service                                                         Load Load Case                      Operating Condition Conditions                                                   Combination A       Normal                Normal Operations                ((
B-1       Upset    Turbine Stop Valve Closure (Acoustic Load)
Turbine Stop Valve Closure (Flow Reversal B-2       Upset Load)                                       BFN RSD B-3       Upset          Operating Basis Earthquake Primary Stress B-4       Upset                      Upset DP Analysis Load C-1   Emergency                 Emergency DP Combinations Main Steam Line Break Outside Containment D-1     Faulted plus SSE (High Power)
Main Steam Line Break Outside Containment D-2     Faulted plus SSE (High Power)
Main SteamLine Break Outside Containment D-3     Faulted (Interlock)
Main Steam Line Break Outside Containment D-4     Faulted (Interlock or Hot Standby)
D-5     Faulted Main Steam Line Break Outside Containment (Hot Standby)                                 ))
l 61


BFN RSD Primary Stress Results l  62 [[                             
Non-Proprietary Information - Class I (Public)
]] Non-Proprietary Information  
BFN RSD Primary Stress Results
- Class I (Public)
((
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l 62


Browns Ferry RSD Power Ascension Monitoring
Browns Ferry RSD Power Ascension Monitoring


l  64 *The BFN lead unit is classified as a
Non-Proprietary Information - Class I (Public)
[[                       
BFN Power Ascension Monitoring
]] *Power ascension monitoring process similar to previous RSD projects *BFN Lead Unit *Both RSD and MSLs instrumented
* The BFN lead unit is classified as a ((
*Monitor using on
                                                                ))
-dryer pressure transducers, strain gauges, and accelerometer BFN Power Ascension Monitoring Non-Proprietary Information
* Power ascension monitoring process similar to previous RSD projects
- Class I (Public)
* BFN Lead Unit
* Both RSD and MSLs instrumented
* Monitor using on-dryer pressure transducers, strain gauges, and accelerometer l 64


l  65 *BFN Lead Unit (continued)
Non-Proprietary Information - Class I (Public)
        ]] *Confirmatory structural analysis for lead unit at EPU
BFN Power Ascension Monitoring
[[                                       
* BFN Lead Unit (continued)
]] *Follow-on Units *MSLs instrumented
((
                        ]] *Confirmatory structural evaluation [[                                                 
                                          ))
]]  BFN Power Ascension Monitoring
* Confirmatory structural analysis for lead unit at EPU ((
[[ [[ Non-Proprietary Information
                        ))
- Class I (Public)
* Follow-on Units
* MSLs instrumented
((                                                                      ))
* Confirmatory structural evaluation ((                        ))
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l  66 BFN RSD Instrumentation Locations
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[[    ]] Non-Proprietary Information  
BFN RSD Instrumentation Locations
- Class I (Public)
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                                          ))
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l  67 BFN RSD Instrumentation
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[[                ]] Non-Proprietary Information  
((
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BFN RSD Instrumentation
                                                          )) l 67


l  68 BFN RSD Inspection Plan
Non-Proprietary Information - Class I (Public)
*During the first two scheduled refueling outages after reaching EPU conditions, a visual inspection will be conducted on the replacement steam dryer for each unit.
BFN RSD Inspection Plan
* During the first two scheduled refueling outages after reaching EPU conditions, a visual inspection will be conducted on the replacement steam dryer for each unit.
The inspection plan will be consistent with the industry guidance. The inspection plan will include all accessible exterior and interior critical locations identified in the vibration and stress analyses for the Browns Ferry RSDs.
The inspection plan will be consistent with the industry guidance. The inspection plan will include all accessible exterior and interior critical locations identified in the vibration and stress analyses for the Browns Ferry RSDs.
Non-Proprietary Information
l 68
- Class I (Public)


Acronyms l  70 Short Form Description ASME American Society of Mechanical Engineers ASR Alternating Stress Ratio AVS Acoustic Vibration Suppressor BFN Browns Ferry Nuclear Plant BWR Boiling Water Reactor CLTP Current Licensed Thermal Power DP Differential Pressure DW Deadweight EPU Extended Power Uprate FE Finite Element FEM  Finite Element Model FIV Flow Induced Vibration FRF Frequency Response Function HF High Frequency IN Information Notice LAR License Amendment Request LF Low Frequency MASR Minimum alternating stress ratio Short Form Description MPC Multi Point Constraint MSL Main Steam Line MSLB Main Steam Line Break OBE Operating Basis Earthquake PBLE Plant Based Load Evaluation PBLE01 PBLE Input On
Acronyms Non-Proprietary Information - Class I (Public)
-Dryer Based PBLE02 PBLE Input MSL Based PSD Power Spectral Density RMS Root-Mean-Squared RPV Reactor Pressure Vessel RSD Replacement Steam Dryer SDAR Steam Dryer Analysis Report SG Strain Gauge SRV Safety Relief Valve SSE Safe Shutdown Earthquake TSV Turbine Stop Valve VFD Variable Frequency Drive VPF Vane Passing Frequency Non-Proprietary Information
Short Form Description                                      Short Form     Description ASME       American Society of Mechanical                   MPC             Multi Point Constraint Engineers                                        MSL             Main Steam Line ASR        Alternating Stress Ratio                        MSLB           Main Steam Line Break AVS        Acoustic Vibration Suppressor                    OBE             Operating Basis Earthquake BFN        Browns Ferry Nuclear Plant                      PBLE           Plant Based Load Evaluation BWR        Boiling Water Reactor                            PBLE01         PBLE Input On-Dryer Based CLTP      Current Licensed Thermal Power                  PBLE02         PBLE Input MSL Based DP        Differential Pressure                            PSD             Power Spectral Density DW        Deadweight                                      RMS             Root-Mean-Squared EPU        Extended Power Uprate                            RPV             Reactor Pressure Vessel FE        Finite Element                                  RSD             Replacement Steam Dryer FEM        Finite Element Model                            SDAR           Steam Dryer Analysis Report FIV        Flow Induced Vibration                          SG             Strain Gauge FRF        Frequency Response Function                      SRV             Safety Relief Valve HF        High Frequency                                  SSE             Safe Shutdown Earthquake IN        Information Notice                              TSV             Turbine Stop Valve LAR        License Amendment Request                        VFD             Variable Frequency Drive LF        Low Frequency                                    VPF             Vane Passing Frequency MASR      Minimum alternating stress ratio l 70
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l  71 Thank you!
Thank you!
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Latest revision as of 14:23, 19 March 2020

4/22/2015, Enclosure 2, Slides for TVA Presentation to the NRC in Support of Steam Dryer Replacement
ML15099A291
Person / Time
Site: Browns Ferry  Tennessee Valley Authority icon.png
Issue date: 04/22/2015
From:
Tennessee Valley Authority
To:
Plant Licensing Branch II
Saba F DORL/LPL2-2 301-415-1447
Shared Package
ML15099A304 List:
References
Download: ML15099A291 (72)
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Text

ENCLOSURE 2 GE Letter No. 175528-011 GEH Slides for TVA Presentation to the NRC in Support of Steam Dryer Replacement Non-Proprietary Information NON-PROPRIETARY NOTICE This is a non-proprietary version of Enclosure 1 of GEH Letter No. 175528-011 which has the proprietary information removed. Portions of the document that have been removed are indicated by an open and closed bracket as shown here (( )).

Non-Proprietary Information - Class I (Public)

Browns Ferry Nuclear Plant Replacement Steam Dryers Gerry Doyle Director EPU April 22, 2015

Non-Proprietary Information - Class I (Public)

Agenda

  • Introductions G. Doyle
  • Overview and Background G. Doyle
  • Browns Ferry Replacement Steam Dryer P. Donahue Design
  • Browns Ferry Replacement Steam Dryer P. Donahue Analysis
  • Browns Ferry Replacement Steam Dryer P. Donahue Power Ascension Monitoring
  • Browns Ferry Replacement Steam Dryer P. Donahue Inspection Plan
  • Questions/Comments G. Doyle l 2

Non-Proprietary Information - Class I (Public)

Overview and Background

  • New Replacement Steam Dryers (RSDs) will be installed in all three Browns Ferry Units
  • To resolve any issues that existing steam dryers may have under EPU conditions
  • Previous submittals, now withdrawn, had over 260 RAIs associated with steam dryers
  • New EPU License Amendment Request (LAR) submittal will address previous issues , look to minimize RAIs, and support NRC approval
  • Current strategy and design complies with existing and contemporary regulatory requirements
  • Contracted with GEH to build our RSDs as they are the Original Equipment Manufacturer and have experience in other recent RSDs
  • We are here to present an overview of our RSDs design, analysis, monitoring plan and inspection plan with an expectation that NRC fully understands the RSD information we plan to submit as part of our EPU LAR
  • Presenter is Pete Donahue, Senior Manager for EPU Engineering
  • Supported by GEH personnel l 3

Non-Proprietary Information - Class I (Public)

BFN Replacement Steam Dryer

  • Based on the curved hood six bank prototype replacement dryer first used in a BWR/4 reactor.
  • Design is significantly more robust than the original steam dryer it replaces.
  • BFN acoustic load definition developed using MSL acoustic pressure measurements taken at the three Browns Ferry units.
  • The FIV fatigue evaluation and primary stress methodologies used for BFN RSD analysis has been reviewed in detail on BWR/6 RSD and ESBWR projects.
  • Analyzed for the applicable primary structural loads for normal operation and for transient and accident conditions.

l 4

Browns Ferry RSD Design

Non-Proprietary Information - Class I (Public)

EPU Replacement Dryer Experience Successful operating history for replacement dryers at EPU

  • Quad Cities Units 1/2 RSD
  • Dresden Units 2/3 RSD
  • Susquehanna Units 1/2 RSD
  • Grand Gulf RSD
  • Vermont Yankee original dryer with modifications l 6

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Steam Dryer Structural Design Timeline

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Steam Dryer Structural Design Timeline

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Steam Dryer Structural Design Timeline

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BFN Replacement Dryer Design

  • Based on the curved hood six bank prototype replacement dryer first used in a BWR/4 reactor.
  • Design is significantly more robust than the original steam dryer it replaces.
  • Both the Browns Ferry reactor vessel and the BWR/4 reactor vessel where the BWR/4 prototype RSD was installed have the same internal diameter; so in essence,

((

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BFN Replacement Dryer Design

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  • Changes to prototype dryer design
  • Dryer/vessel interface changes
  • Address OE lessons learned
  • Stress reduction

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BFN Replacement Dryer Design

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BFN Replacement Dryer Design

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BFN RSD Design Improvement

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BFN RSD Design Improvement

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BFN RSD Design Improvement

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BFN RSD Design Refinement

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BFN RSD Design Refinement

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BFN RSD Design Refinement

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BFN RSD Design Refinement

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BFN RSD Design Refinement

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BFN RSD Design Refinement

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Browns Ferry RSD Analysis

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BFN RSD Analysis Overview

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Browns Ferry RSD Load Definition

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BFN RSD Analysis Load Definition

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BFN RSD Analysis Load Definition

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BFN RSD Analysis Load Definition

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BFN RSD Analysis Load Definition

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Potential SRV Resonance Frequencies

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SRV Resonance Fundamental Frequency

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MSL Acoustic Mode Interaction

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MSL Acoustic Mode Interaction

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Postulated SRV Resonances

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SRV Adders for Design Load Definition

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EPU SRV Scale Factor

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EPU SRV Scale Factor

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BFN RSD Analysis Load Definition

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Dryer Load Comparison

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BFN RSD Analysis Load Definition

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BFN RSD Analysis Load Definition

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BFN RSD Analysis Load Definition

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BFN RSD Analysis Load Definition

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BFN RSD Analysis Load Definition

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BFN RSD Analysis Load Definition

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Browns Ferry RSD FIV Analysis

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BFN RSD Finite Element Model

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BFN-Specific Design Improvements

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BFN-Specific Design Improvements

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BFN-Specific Design Improvements

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BFN RSD FEM Mesh Convergence

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BFN RSD FIV Analysis

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BFN RSD FIV Analysis

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End to End Bias and Uncertainty

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End to End Bias and Uncertainty

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FIV Stress Adjustment

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FIV Stress Adjustment

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BFN RSD Fatigue Analysis Results

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Browns Ferry RSD Primary Stress Evaluation

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BFN RSD Primary Stress Evaluation

  • The steam dryer is a non-safety related item and is classified as an Internal Structure as defined in ASME Subsection NG, Paragraph NG-1122.
  • The steam dryer is not an ASME Code component, but ((

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Non-Proprietary Information - Class I (Public)

Service Load Load Case Operating Condition Conditions Combination A Normal Normal Operations ((

B-1 Upset Turbine Stop Valve Closure (Acoustic Load)

Turbine Stop Valve Closure (Flow Reversal B-2 Upset Load) BFN RSD B-3 Upset Operating Basis Earthquake Primary Stress B-4 Upset Upset DP Analysis Load C-1 Emergency Emergency DP Combinations Main Steam Line Break Outside Containment D-1 Faulted plus SSE (High Power)

Main Steam Line Break Outside Containment D-2 Faulted plus SSE (High Power)

Main SteamLine Break Outside Containment D-3 Faulted (Interlock)

Main Steam Line Break Outside Containment D-4 Faulted (Interlock or Hot Standby)

D-5 Faulted Main Steam Line Break Outside Containment (Hot Standby) ))

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BFN RSD Primary Stress Results

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Browns Ferry RSD Power Ascension Monitoring

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BFN Power Ascension Monitoring

  • The BFN lead unit is classified as a ((

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  • Power ascension monitoring process similar to previous RSD projects
  • Both RSD and MSLs instrumented
  • Monitor using on-dryer pressure transducers, strain gauges, and accelerometer l 64

Non-Proprietary Information - Class I (Public)

BFN Power Ascension Monitoring

((

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  • Confirmatory structural analysis for lead unit at EPU ((

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  • Follow-on Units

(( ))

  • Confirmatory structural evaluation (( ))

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BFN RSD Instrumentation Locations

((

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((

BFN RSD Instrumentation

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BFN RSD Inspection Plan

  • During the first two scheduled refueling outages after reaching EPU conditions, a visual inspection will be conducted on the replacement steam dryer for each unit.

The inspection plan will be consistent with the industry guidance. The inspection plan will include all accessible exterior and interior critical locations identified in the vibration and stress analyses for the Browns Ferry RSDs.

l 68

Acronyms Non-Proprietary Information - Class I (Public)

Short Form Description Short Form Description ASME American Society of Mechanical MPC Multi Point Constraint Engineers MSL Main Steam Line ASR Alternating Stress Ratio MSLB Main Steam Line Break AVS Acoustic Vibration Suppressor OBE Operating Basis Earthquake BFN Browns Ferry Nuclear Plant PBLE Plant Based Load Evaluation BWR Boiling Water Reactor PBLE01 PBLE Input On-Dryer Based CLTP Current Licensed Thermal Power PBLE02 PBLE Input MSL Based DP Differential Pressure PSD Power Spectral Density DW Deadweight RMS Root-Mean-Squared EPU Extended Power Uprate RPV Reactor Pressure Vessel FE Finite Element RSD Replacement Steam Dryer FEM Finite Element Model SDAR Steam Dryer Analysis Report FIV Flow Induced Vibration SG Strain Gauge FRF Frequency Response Function SRV Safety Relief Valve HF High Frequency SSE Safe Shutdown Earthquake IN Information Notice TSV Turbine Stop Valve LAR License Amendment Request VFD Variable Frequency Drive LF Low Frequency VPF Vane Passing Frequency MASR Minimum alternating stress ratio l 70

Thank you!

Questions?

Comments?

l 71

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