Dakota Nickerson, Kyle Pflueger, Adam Leschber, Andrew Dahlke M.E. Undergrad 1

The purpose of this project is to design and build a scaled boiling water test loop, serving as a test bench that can demonstrate the engineering design concepts of the BWTL as well as verify the boiling regime. 2 Agenda BackgroundConceptsMissionComponents Project Learning

Present:  Background for BWTL Project  Schematic of BWTL  BWTL Test Apparatus  Apparatus Components 33 Agenda BackgroundConceptsMissionComponents Project Learning

4  Allows Accelerated Testing  Recently Became National Scientific User Facility  Now Public and Private Researchers can use for Nuclear Experiments 4 Agenda BackgroundConceptsMissionComponents Project Learning

 Second Most Common Commercial Reactor in United States  Used for Electric Power Production 55 Agenda BackgroundConceptsMissionComponents Project Learning

 Entire Loop Operates at the Vapor Pressure of Water Pump is Used Only For Circulation not for Pressurization  Steady State Operation and Control System  Heat Transfer on Nuclear Fuel Rod 66 Agenda BackgroundConceptsMissionComponents Project Learning

7 BWTL Design Concept Line heater Heater Element Temp – 320± 20 F Press – 90 psia Pressure Relief Valve Heat Exchanger PETE Pump Temp – 320 ± 20 F Press – 90 psia PETE Temp –320 ± 20 F Press – 90 psia TE ASME Expansion Tank Line heater 4.5 kW Variable Phase Angle Controller Process Controller Prop. Elect. Valve PETE Agenda BackgroundConceptsMissionComponents Project Learning

 Vapor Pressure The Pressure Created Above a Liquid at a Given Temperature – 14.7 psia at 212 °F  Pool Boiling Liquid at Boiling Temperature  Film Boiling Layer of Vapor Between Heating Element and Liquid 88 Agenda BackgroundConceptsMissionComponents Project Learning

9  Pressure/Temperature will be Controlled by Varying the Amount of Cooling Water Circulated Through the Heat Exchanger 9 Agenda BackgroundConceptsMissionComponents Project Learning

10 Clear Test Section Line Heaters Gear Pump Expansion Tank Heat Exchanger Cartridge Heater 10 Agenda BackgroundConceptsMissionComponents Project Learning

11 Agenda ConceptsBackgroundComponentsMission Line Heaters  4.5 kW Max Output Water Heaters  Power Output can be Varied between 0 – 100% by means of Phase Angle SCR Power Controllers. Project Learning

12 Heat Exchanger  Shell and Tube  Oversized to Allow Use of Proportional Electrical Valve.  14.7 ft 2 Heat Transfer Area 12 Agenda BackgroundConceptsMissionComponents Project Learning

13 Expansion Tank  8.3 Gallons  Stainless Steel  Built-in Temperature and Pressure Fitting 13 Agenda BackgroundConceptsMissionComponents Project Learning

14 Gear Pump  Positive Displacement  Variable Flow Rate through Variable RPM of Motor .5 hp Motor 14 Agenda BackgroundConceptsMissionComponents Project Learning

15 Sight Glass  Transparent  Plastic Shell over Glass  Rated to Withstand:  150 psi  400 °F 15 Agenda BackgroundConceptsMissionComponents Project Learning

16 Cartridge Heater  3.25 kW/ft Constant Output  12 in Long x.5 in Diameter 16 Agenda BackgroundConceptsMissionComponents Project Learning

18 Agenda BackgroundConceptsMissionComponents  Purchasing From Vendors is Significantly More Difficult with Custom Built Parts  Everything Always Takes Longer than Planned  Communication Between Client and Team is Just as Important as Team Communication.  Having A Definitive Goal and Mission Statement is Key in the Success of a Project. Project Learning

19 Agenda BackgroundConceptsMissionComponents  Installation of Test Section  Testing of System:  Verification of Pressurized Test  Confirmation of Design and Components under Vapor Pressure of Water  Delivery of Final Product Project Learning

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22  A & delta T can be Measured  Q will be Known From the Electrical Input  H can be Determined Using the Equation Above. 22 Agenda BackgroundConceptsMissionComponentsQuestions

 Critical Heat Flux 23.6 kW/ft – well above heater output  Linear Heat Rate From The Cartridge Heater: 3.25 kW/ft  Required exit quality: 14.6%  Assuming inlet quality: 7.5%  Expected BWTL Flow Rate: 0.51 gallons per minute 23