Direct Push Method for Installing Smart Test Stations and Collecting - PowerPoint PPT Presentation

Direct Push Method for Installing Smart Test Stations and Collecting in-situ Soil Sampling at LaSalle County Generation Station Presentation EPRI BPIG Wednesday, February 18, 2014

Co-Authors/Contributors Greg Lupia Exelon BP Program Owner Alex Iuga Exelon CP Program Owner Chad Rowe LaSalle Project Manager Kevin Hall LaSalle BP Program Owner Viam Chopra LaSalle CP Program Owner Matt Darois RSCS Peter McNeil RSCS Rudy Rawcliffe Northeast Geophysical Scott Paul CorrTech Hank Kleinfelder CorrTech

Challenge Comply with NEI 09-14 “Reasonable Assurance” Comply with NRC LR-ISG-2011-03 Huge excavation costs for the inspection of systems that have proven to be robust and do not generate revenue How can we determine the potentials and/or CP effectiveness at pipe depth How can we justify the 100mv shift criteria

Potential Solution: Push-Probe Smart Stack Test Stations Strategically Positioned Test Stations CP Effectiveness at Pipe Depth Corrosion Rates at Subject Pipe Depth Soil Sampling & Smart Stack Can Help Comply With Both NEI 07-07 NEI 09-14

Direct Push Soil Sampling & Smart Stack Installation Down-force and percussion are used to drive a soil sampler into unconsolidated soil Down-force (push) applied by a hydraulic ram Percussion applied with an integrated hydraulic hammer (jack hammer) Rigs vary in size and design Some are as large as small rotary drill rigs Small rigs (< 2 ton) are ideal for nuclear facilities

Direct PushSamplingProcess

Push-Probe

Safety The rig is always grounded to the site grounding grid (or rod) Containment berm erected around the rig Training, experience and work controls: Documented training Experience Rig operation: tone, vibration, advancement rate, collected media inspection: “is that a rock or concrete?” Familiar with plant: components, layout, operations etc.

Is it Safe? • 2-inch galvanized electrical conduit • Under real-world scenarios work controls would have stopped advancement seconds after contact.

Precise Location Maps

Direct-Push Permits Precise Smart Stack P lacement

Analytical Soil Results:

Boring Logs:

Interpreting the results:

CHECKMATE HANDHELD COMPUTER

SMART STACK CORROSION INFORMATION  IR Drop Free Readings  Select Material Freely Corroding Coupon Potential  ie: Carbon Steel  CP Protected Coupon Potential  Freely Corroding Corrosion Rate Monitor  CP Protected Corrosion Rate Monitor  Pipeline of Interest Potentials

Benefits of Smart Stack Data  Possibly Satisfy NACE 100mv CP Criteria  Accurate Localized Data May Reduce Direct Examinations  Eliminate Interrupters for Instant-Off Potentials  Helps CP System Balancing  Confirm That Local Corrosion Rates Necessitate CP  Verify Direct Assessment and APEC Indications

Questions?