V andal E ngineers C reating C old T raps for R eactors Members: Jeff Haines, Jason Cyr, Dan Powers, Rob Richardson Mentor: Peter Britanyak Instructor: Dr. Jay McCormack Sponsor: Dr. Akira Tokuhiro

Design, develop and deliver a Test Section and “Active” Cold Trap for the Argonne National Laboratory small sodium loop. Project Goals  Operate up to 500 o C  Incorporate Invasive and External Transducer Interface

 Collect Velocimetry Data  Test Section  Ultrasonic Transducer Interface  ANL Small Sodium Loop Interface  Control Impurity Levels in Sodium Loop  “Active” Cold Trap  Lower Temperature

 Test Section  Features  Calculations  Cold Trap  Features  Calculations  Testing  Future Work Test loop at Argonne National Laboratory

FUNCTIONAL REQUIREMENTS  Measure Velocity  Measure and Control Temperature  Interfaces with Test Loop DESIGN PARAMETERS  Acoustic Transducer Measurement  Temperature Controlled Test Section  Meets Argonne Standards and Uses Existing Fittings

 Ultrasonic Transducer  Doppler Shift  Waveguide  Reflector Plate

LIMIT CONTROLLER  Omega® CN700 Series  Compatible with Type K Thermocouples TEMPERATURE CONTROLLER  Omega® CN740 Series  Displays Actual and Set Temperatures  Compatible with Type K Thermocouples

 Omega SWH Ribbon Heater  Capable of 1881 W  Maintain flow of 500 o C  Alumina-Silicate Inswool Blanket  Designed for high temperature applications

 Heat lost to environment ~ 15%  Input 468 W to maintain 500 o C  25 minutes to raise sodium temperature from 350 o C to 500 o C with 1881 W heater

 Swagelok VCR Face Seal Fittings  Test Section as 304 Stainless Steel  End Plates made of 14 Gauge Stainless Steel

FUNCTIONAL REQUIREMENTS  Remove Impurities  Lower Temperature  Filter  Reintroduce Impurities  Mechanical Vibration  Passive Heating  Interfaces with test loop DESIGN PARAMETERS  Cold Trap/Cold Surface  Release Mechanism  Meets Argonne Standards and Uses Existing Fittings

 Cold Trap and Heat Exchanger as Separate Units  3.6 L total volume  304 Stainless Steel construction

System requires 29kW heat removed to reduce sodium from 500 o C to 130 o C  Economizer  Double pipe heat exchanger  Joule-Thompson Cooling  Nitrogen gas

 Filter design  Mesh Sizes  200 micron  176 micron  75 micron  Interface

 Electric motor with offset weight  Bolts to tube protruding into Cold Trap  Vibrations generated shake particles loose

 Transducer Signal Checking  Heater Control and Feedback  J-T Cooling Array  Inactive Filtration  Activeness of Release Mechanism

 Test Section and Cold Trap Testing  ASME Code  Installation and Integration