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Boiling Water Test Loop University of Idaho

Dakota Nickerson, Kyle Pflueger , Adam Leschber , Andrew Dahlke M.E. Undergrad. Boiling Water Test Loop University of Idaho . What We Want to Accomplish Today. Provide Insight s found for Initial BWTL Provide Insights found for Proposed BWTL Verify Deliverable for this Project

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Boiling Water Test Loop University of Idaho

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  1. Dakota Nickerson, Kyle Pflueger, Adam Leschber, Andrew Dahlke M.E. Undergrad Boiling Water Test LoopUniversity of Idaho

  2. What We Want to Accomplish Today • Provide Insights found for Initial BWTL • Provide Insights found for Proposed BWTL • Verify Deliverable for this Project • Verify Component Selection

  3. BWTL • BWTL- Boiling Water Test Loop • A closed steam loop system that simulates the conditions seen in a Boiling Water Reactor for the purpose of testing nuclear fuel rods in the Advanced Test Reactor (ATR).

  4. TE TE TE TE Line heater Line heater BWTL Design Recieved Pressure Control Valve Flow Elements PI Condenser or quench tank Circulating Water Temp – 545F Press – 1020 psig Temp – 100F Press – 2 psig Condensate Pump Temp – 110F Press – 160 psig Demineralizer Temp – 530F Press – 1050 psig Heater Element PI Booster Pump Isolation Valve Feedwater pump Temp – 400F Press – 1050 psig Temp – 120F Press – 600 psig

  5. Problem Identification The purpose of this project is to design and build a scaled boiling water test loop that can be used to verify the boiling regime while controlling inlet and outlet steam qualities.

  6. Heat Exchanger Line heater Proposed BWTL Design Pressure Relief Valve TE PE ASME Expansion Tank TE Temp – 295 ± 5 F Press – 60 psig Temp –290 ± 5 F Press – 60 psig 1 5 6 Heater Element TE 4 Pump 2 3 Temp – 295 ± 5 F Press – 60 psig Temp 290 ± 5 F Press – 60 psig TE PE

  7. Value Gained From This Project • 1st Pass Prototypethat will provide insight into critical design aspects associated with a Boiling Water Test Loop.

  8. 1: Cartridge Heater A Chromalox cartridge heater has been chosen to simulate the 18” nuclear fuel rod. Dimensions are: 18” length, .500” diameter. The manufacturer has told us we can expect 5.6 kW/ft.

  9. 2: Test Section Option 1: Transparent High Temp Plastic Tube • Poly-Sulfone • Rated to 300 F • ID of 0.75 in, and OD of 1.00 in. • Cost is approximately $100.

  10. 2: Test Section Option 2: Sight Glass Tube • Glass Pressure vessel. • Can be threaded or flanged directly to pipe. • Rated to 500F and 500 psi • Cost: $600 • Recommended Design

  11. 3: Heater • Circular Flow Heater • Will Provide 15 kW of energy into system. • Accompanied with Control panel that will provide inlet and outlet temperature.

  12. 4: Pump Recommended Pump:

  13. 5: Heat Exchanger • Cross flow, shell and tube heat exchanger • Capacity in excess of 20 kW

  14. 6: Expansion Tank • ASME pressure vessel • Will allow room for water to turn to vapor

  15. Linear Heat Rate From The Chromalox Heater: 5.65 kW/ft Required exit quality: 14.6% Assuming inlet quality: 7.5% Expected Scaled Loop Flow Rate: 0.89 gallons per minute Analysis

  16. Critical Heat Flux • Critical Heat Flux is 1944 kW/m2 • Our heat flux is 464 kW/m2 • Therefore our critical linear heat rate is 23.6 kW/ft – well below heater output

  17. Design Concerns • Line heater • Outlet steam management • Pump life • Control system • Safety • Costs

  18. Total Cost • Cartridge Heater: $200 • Sight Glass/Test tube: $600 • Heater: $1000 • Heater Control: N/A • Pump: $350 • Pump Motor and Speed Control: N/A • Heat Exchanger: $1100 • Expansion Tank: $800 • Stainless Steel Tubing 30 ft: $150 • Fittings: $450 • Mounting System: $350 • Tubing Insulation: $100 • Sensors: N/A • Total≈ $5100 + sensors, pump motor, and sensors/control

  19. Spring 2010 Timeline • Detailed design package completed by January 29 • All parts ordered by February 5. • Apparatus built by April 9. • Trouble shooting and Testing April 16 – May 7

  20. Specificaitons

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