ML15099A291
| ML15099A291 | |
| Person / Time | |
|---|---|
| Site: | Browns Ferry  |
| 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) | |
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 (( )).
Browns Ferry Nuclear Plant Replacement Steam Dryers Gerry Doyle Director EPU April 22, 2015 Non-Proprietary Information - Class I (Public)
Agenda l 2
Introductions
Overview and Background Browns Ferry Replacement Steam Dryer Design Browns Ferry Replacement Steam Dryer Analysis Browns Ferry Replacement Steam Dryer Power Ascension Monitoring Browns Ferry Replacement Steam Dryer Inspection Plan Questions/Comments G. Doyle G. Doyle P. Donahue P. Donahue P. Donahue P. Donahue G. Doyle Non-Proprietary Information - Class I (Public)
Overview and Background l 3 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- Previous submittals, now withdrawn, had over 260 RAIs associated with steam dryers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 Non-Proprietary Information - Class I (Public)
BFN Replacement Steam Dryer l 4 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.
Non-Proprietary Information - Class I (Public)
Browns Ferry RSD Design
EPU Replacement Dryer Experience l 6 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 Non-Proprietary Information - Class I (Public)
l 7 Steam Dryer Structural Design Timeline
((
))
Non-Proprietary Information - Class I (Public)
l 8 Steam Dryer Structural Design Timeline
((
Non-Proprietary Information - Class I (Public)
))
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 Dryer/vessel interface changes Address OE lessons learned Stress reduction
((
))
Non-Proprietary Information - Class I (Public)
BFN Replacement Dryer Design l 12
((
))
Non-Proprietary Information - Class I (Public)
BFN Replacement Dryer Design l 13
))
((
Non-Proprietary Information - Class I (Public)
BFN RSD Design Improvement l 14
((
))
Non-Proprietary Information - Class I (Public)
BFN RSD Design Improvement l 15
((
))
Non-Proprietary Information - Class I (Public)
BFN RSD Design Improvement l 16
((
))
Non-Proprietary Information - Class I (Public)
BFN RSD Design Refinement l 17
))
((
Non-Proprietary Information - Class I (Public)
BFN RSD Design Refinement l 18
((
))
Non-Proprietary Information - Class I (Public)
BFN RSD Design Refinement l 19
((
))
Non-Proprietary Information - Class I (Public)
BFN RSD Design Refinement l 20
((
))
Non-Proprietary Information - Class I (Public)
BFN RSD Design Refinement l 21
((
))
Non-Proprietary Information - Class I (Public)
BFN RSD Design Refinement l 22
((
))
Non-Proprietary Information - Class I (Public)
Browns Ferry RSD Analysis
BFN RSD Analysis Overview l 24
))
((
Non-Proprietary Information - Class I (Public)
Browns Ferry RSD Load Definition
BFN RSD Analysis Load Definition l 26
))
((
Non-Proprietary Information - Class I (Public)
BFN RSD Analysis Load Definition l 27
))
((
Non-Proprietary Information - Class I (Public)
BFN RSD Analysis Load Definition l 28
((
))
Non-Proprietary Information - Class I (Public)
BFN RSD Analysis Load Definition l 29
((
))
Non-Proprietary Information - Class I (Public)
Potential SRV Resonance Frequencies l 30
((
))
Non-Proprietary Information - Class I (Public)
SRV Resonance Fundamental Frequency l 31
((
))
Non-Proprietary Information - Class I (Public)
MSL Acoustic Mode Interaction l 32
((
))
Non-Proprietary Information - Class I (Public)
l 33 MSL Acoustic Mode Interaction
))
((
Non-Proprietary Information - Class I (Public)
Postulated SRV Resonances l 34
((
))
Non-Proprietary Information - Class I (Public)
SRV Adders for Design Load Definition l 35
))
((
Non-Proprietary Information - Class I (Public)
((
))
Non-Proprietary Information - Class I (Public)
))
((
Non-Proprietary Information - Class I (Public)
BFN RSD Analysis Load Definition l 38
((
))
Non-Proprietary Information - Class I (Public)
Dryer Load Comparison l 39
))
((
Non-Proprietary Information - Class I (Public)
BFN RSD Analysis Load Definition l 40
((
))
Non-Proprietary Information - Class I (Public)
BFN RSD Analysis Load Definition l 41
))
((
Non-Proprietary Information - Class I (Public)
BFN RSD Analysis Load Definition l 42
((
))
Non-Proprietary Information - Class I (Public)
BFN RSD Analysis Load Definition l 43
((
))
Non-Proprietary Information - Class I (Public)
BFN RSD Analysis Load Definition l 44
))
((
Non-Proprietary Information - Class I (Public)
BFN RSD Analysis Load Definition l 45
((
))
Non-Proprietary Information - Class I (Public)
Browns Ferry RSD FIV Analysis
BFN RSD Finite Element Model l 47
((
))
Non-Proprietary Information - Class I (Public)
BFN-Specific Design Improvements l 48
((
))
Non-Proprietary Information - Class I (Public)
BFN-Specific Design Improvements l 49
((
))
Non-Proprietary Information - Class I (Public)
BFN-Specific Design Improvements l 50
((
))
Non-Proprietary Information - Class I (Public)
BFN RSD FEM Mesh Convergence l 51
((
))
Non-Proprietary Information - Class I (Public)
((
))
Non-Proprietary Information - Class I (Public)
((
))
Non-Proprietary Information - Class I (Public)
End to End Bias and Uncertainty l 54
((
))
Non-Proprietary Information - Class I (Public)
l 55 End to End Bias and Uncertainty
((
))
Non-Proprietary Information - Class I (Public)
FIV Stress Adjustment l 56
((
))
Non-Proprietary Information - Class I (Public)
FIV Stress Adjustment l 57
((
))
Non-Proprietary Information - Class I (Public)
BFN RSD Fatigue Analysis Results l 58
((
))
Non-Proprietary Information - Class I (Public)
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-1122.
- The steam dryer is not an ASME Code component, but ((
))
Non-Proprietary Information - Class I (Public)
l 61 Load Case Service Conditions Operating Condition Load Combination A
Normal Normal Operations
((
B-1 Upset Turbine Stop Valve Closure (Acoustic Load)
B-2 Upset Turbine Stop Valve Closure (Flow Reversal Load)
B-3 Upset Operating Basis Earthquake B-4 Upset Upset DP C-1 Emergency Emergency DP D-1 Faulted Main Steam Line Break Outside Containment plus SSE (High Power)
D-2 Faulted Main Steam Line Break Outside Containment plus SSE (High Power)
D-3 Faulted Main SteamLine Break Outside Containment (Interlock)
D-4 Faulted Main Steam Line Break Outside Containment (Interlock or Hot Standby)
D-5 Faulted Main Steam Line Break Outside Containment (Hot Standby)
))
BFN RSD Primary Stress Analysis Load Combinations Non-Proprietary Information - Class I (Public)
BFN RSD Primary Stress Results l 62
((
))
Non-Proprietary Information - Class I (Public)
Browns Ferry RSD Power Ascension Monitoring
l 64
))
- Power ascension monitoring process similar to previous RSD projects
- BFN Lead Unit Both RSD and MSLs instrumented Monitor using on-dryer pressure transducers, strain gauges, and accelerometer BFN Power Ascension Monitoring Non-Proprietary Information - Class I (Public)
l 65
))
Confirmatory structural analysis for lead unit at EPU ((
))
- Follow-on Units MSLs instrumented
))
Confirmatory structural evaluation (( ))
BFN Power Ascension Monitoring
((
((
Non-Proprietary Information - Class I (Public)
l 66 BFN RSD Instrumentation Locations
((
))
Non-Proprietary Information - Class I (Public)
l 67 BFN RSD Instrumentation
((
))
Non-Proprietary Information - Class I (Public)
l 68 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.
Non-Proprietary Information - Class I (Public)
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-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 - Class I (Public)
l 71 Thank you!
Questions?
Comments?