ML121160349
| ML121160349 | |
| Person / Time | |
|---|---|
| Site: | Seabrook  |
| Issue date: | 04/23/2012 |
| From: | Bayrak O University of Texas at Austin |
| To: | Division of Operating Reactor Licensing |
| Lamb J, NRR/DORL, 301-415-3100 | |
| References | |
| Download: ML121160349 (33) | |
Text
STRUCTURAL ASSESSMENT OF SEABROOK STATION Findings and Structural Testing Plan OGUZHAN BAYRAK, Ph.D., P.E.
Ferguson Structural Engineering Laboratory The University of Texas at Austin April 23, 2012
KNOWLEDGE BASE INVOLVEMENT TO DATE AGENDA INTERIM ASSESSMENT STRUCTURAL TESTING
KNOWLEDGE BASE KNOWLEDGE BASE
OGUZHAN BAYRAK, Ph.D., P.E.
- Investigations into the effects of ASR in highway structures were initiated in 2005
- Effects of ASR on multiple aspects of structural behavior have been evaluated DR. OGUZHAN BAYRAK, PE STRUCTURAL ASSESSMENT OF SEABROOK STATION l KNOWLEDGE BASE 4
structural behavior have been evaluated through large-scale laboratory testing
- Critical insights gained from laboratory testing results and international literature
ASR IN THE STATE OF TEXAS Lawrence et al., 1999 DR. OGUZHAN BAYRAK, PE STRUCTURAL ASSESSMENT OF SEABROOK STATION l KNOWLEDGE BASE 5
TxDOT IAC 128XXIA006 LARGE-SCALE EXPERIMENTAL RESEARCH Flexure and Shear Behavior TxDOT IAC 128XXIA007 Dapped End Behavior TxDOT IAC 5DDIA004 Anchor Bolt Behavior DR. OGUZHAN BAYRAK, PE STRUCTURAL ASSESSMENT OF SEABROOK STATION l KNOWLEDGE BASE 6
FERGUSON STRUCTURAL ENGINEERING LABORATORY DR. OGUZHAN BAYRAK, PE STRUCTURAL ASSESSMENT OF SEABROOK STATION l KNOWLEDGE BASE 7
INVOLVEMENT TO DATE INVOLVEMENT TO DATE
INVOLVEMENT TO DATE Paper on ASR Paper on ACI 318-71 DR. OGUZHAN BAYRAK, PE STRUCTURAL ASSESSMENT OF SEABROOK STATION l INVOLVEMENT TO DATE 9
Start Walkdown at Seabrook Station NRC Management Meeting Dec Jan Feb Mar Apr Nov 2011 2012 Reviewed Interim Structural Assessment
INTERIM STRUCTURAL ASSESSMENT Expert Review DR. OGUZHAN BAYRAK, PE STRUCTURAL ASSESSMENT OF SEABROOK STATION l INVOLVEMENT TO DATE 10
INTERIM ASSESSMENT INTERIM ASSESSMENT
INTERIM ASSESSMENT Strength Margin ACI 318-71 ASR OR One-Way Shear Strength DR. OGUZHAN BAYRAK, PE STRUCTURAL ASSESSMENT OF SEABROOK STATION 12 Original Condition Current Condition OR Anchorage of Reinforcement
INTERIM ASSESSMENT Performance of large ASR-affected structures is not well represented by current test data set.
Limit State Lower-Bound Reference Specimen Scale One Way Shear DR. OGUZHAN BAYRAK, PE STRUCTURAL ASSESSMENT OF SEABROOK STATION 13 One-Way Shear without Transverse Reinforcement Ahmed et al., 1998 Reinforcement Anchorage without Transverse Reinforcement Chana, 1989 5
47 12 12 No. 5
STRUCTURAL TESTING STRUCTURAL TESTING
METHODOLOGY Interim Structural Assessment Shear and Lap Splice Test Programs Quantify Margin Available Above Code-Calculated Capacities Quantify Impact of ASR on Structural Capacity and ff Final Structural Assessment DR. OGUZHAN BAYRAK, PE STRUCTURAL ASSESSMENT OF SEABROOK STATION l STRUCTURAL TESTING 15 Today Capacities Stiffness Aging Management Program
TEST PROGRAMS SHEAR 9 Beams LAP SPLICE 9 Beams Effects of ASR Design Margin Retrofit Strategies DR. OGUZHAN BAYRAK, PE STRUCTURAL ASSESSMENT OF SEABROOK STATION l STRUCTURAL TESTING 16 Series I I-1 I-2 I-3 I-4 Control C-1 Series II II-1 II-2 II-3 II-4
REPLICATION OF SEABROOK DETAILS The reinforcement detailing will:
- represent the lack of through-thickness reinforcement within tunnel walls DR. OGUZHAN BAYRAK, PE STRUCTURAL ASSESSMENT OF SEABROOK STATION l KNOWLEDGE BASE 17
- enable focused study of shear and anchorage behavior at current and future levels of ASR degradation
REPLICATION OF SEABROOK DETAILS The concrete mixture will:
- be developed through trial batching with representative coarse and fine aggregates DR. OGUZHAN BAYRAK, PE STRUCTURAL ASSESSMENT OF SEABROOK STATION l KNOWLEDGE BASE 18
- be sufficiently reactive to obtain the necessary data in a timely manner
- develop mechanical properties that are representative of Seabrook structures
Load Cells CL Load Cells Test Region SHEAR TESTING Displacement Transducers DR. OGUZHAN BAYRAK, PE STRUCTURAL ASSESSMENT OF SEABROOK STATION l STRUCTURAL TESTING 19
Applied Load TBD 3 6 Reinforcement Mats SHEAR TESTING Support Reaction Support Reaction 2
3-2 3-2 21-4 Test Region DR. OGUZHAN BAYRAK, PE STRUCTURAL ASSESSMENT OF SEABROOK STATION l STRUCTURAL TESTING 20
Load Cells Load Cells Test Region ANCHORAGE TESTING Displacement Transducers DR. OGUZHAN BAYRAK, PE STRUCTURAL ASSESSMENT OF SEABROOK STATION l STRUCTURAL TESTING 21
TBD 3 6 Applied Loads Transverse TBD ANCHORAGE TESTING Support Reaction Support Reaction 2
3-2 3-2 21-4 Reinforcement Mats Test Region Transverse Reinforcement Lap Splice DR. OGUZHAN BAYRAK, PE STRUCTURAL ASSESSMENT OF SEABROOK STATION l STRUCTURAL TESTING 22
Beam Conditioning Structural PROJECT WORKFLOW Fabrication Monitoring Testing DR. OGUZHAN BAYRAK, PE STRUCTURAL ASSESSMENT OF SEABROOK STATION l STRUCTURAL TESTING 23
Maine Granite Sodium Hydroxide CONCRETE MIXTURE FSEL Lehigh Cement Jobe Sand DR. OGUZHAN BAYRAK, PE STRUCTURAL ASSESSMENT OF SEABROOK STATION l STRUCTURAL TESTING 24
BEAM FABRICATION DR. OGUZHAN BAYRAK, PE STRUCTURAL ASSESSMENT OF SEABROOK STATION l STRUCTURAL TESTING 25
CONDITIONING DR. OGUZHAN BAYRAK, PE STRUCTURAL ASSESSMENT OF SEABROOK STATION l STRUCTURAL TESTING 26
Cracking indices will be correlated to measured expansions as well as structural test results for use in Seabrook Station.
EXPANSION MONITORING Expansions Cracking Indices Structural Performance DR. OGUZHAN BAYRAK, PE STRUCTURAL ASSESSMENT OF SEABROOK STATION l STRUCTURAL TESTING 27
STRUCTURAL TESTING DR. OGUZHAN BAYRAK, PE STRUCTURAL ASSESSMENT OF SEABROOK STATION l STRUCTURAL TESTING 28
ANALYSIS OF RESULTS kASR P = k*BEAM Force, P Strength & Stiffness l
f Damaged DR. OGUZHAN BAYRAK, PE STRUCTURAL ASSESSMENT OF SEABROOK STATION l STRUCTURAL TESTING 29 kCONTROL Beam Deformation, BEAM Applied Implications of ASR Undamaged
REPRESENTATIVE RESULTS 6
8 10 12 pan Shear, V/bdf'c DR. OGUZHAN BAYRAK, PE STRUCTURAL ASSESSMENT OF SEABROOK STATION l STRUCTURAL TESTING 30 0
2 4
0 0.2 0.4 0.6 0.8 1
1.2 Normalized Test S Deflection at Load [in]
APPLICATION OF RESULTS Original Design Margin Crack Index
% Reduction Effect of ASR Proven Retrofit Strategy Final Stiffness Anchorage Shear Aging Management Program Structural Monitoring Program Predefined Action Levels Structural Assessment
SCHEDULE Interim Structural Assessment Shear and Lap Splice Test Programs Quantify Margin Available Above Code-Calculated Capacities Quantify Impact of ASR on Structural Capacity and ff Final Structural Assessment Quantify Impact of current ASR on Structural Capacity and ff Final Report APRIL 2014 DR. OGUZHAN BAYRAK, PE STRUCTURAL ASSESSMENT OF SEABROOK STATION l STRUCTURAL TESTING 32 Today Capacities Stiffness Aging Management Program Stiffness Note: Ambient conditions may impact development of ASR in test specimens and project schedule
QUESTIONS QUESTIONS