1. By: Matt Luedeman, Peter Wells, Chris Dyke Advisor: Jay McCormack Clients: Dr. Karl Rink Dr. Akira Tokuhiro 1

2.  Problem Overview  Testing Procedures  Vessel Requirements  Heating Components  Vessel Sizing  Future Plans  Questions 2

3. Purpose: The Next Generation Nuclear Power Plant (NGNP) uses a graphite pebble bed as a neutron moderator.  Dust creation  PEBBLES Code  Unknown properties of nuclear grade graphite 3

4. Two main parts:  Create testing procedures for finding Young’s/Shear Modulus, Poisson’s Ratio Static/Kinetic Coefficients of Friction.  Create a heated pressure vessel that can simulate the environment in a nuclear reactor. 4

5. Young’s Modulus 5 Shear Modulus Coefficients of Friction

6. Vessel Requirements  Temperature: 700 C  Pressure: 7 MPa  Testing Space: 12” Diameter, 12” Length  Room for Heater  Viewing Window 6

7. Fiber Insulated Resistance Wire Heater from Zircar Ceramics:  Custom Size: 16” Length, 16” OD  Insulation included  Time to heat  Temperature Control 7

8. Variable transformer:  Varies power to heater  Controls heater temperature  Thermocouples used to take temperature readings 8

9.  Provide power to heater while still keeping seal  Power feed-through must be rated to withstand:  Pressure  Temperature of outside of insulation  Insulated standoff used 9

10. 10 Vessel Sizing Cylinder Requirements:  18” L, 16” ID  Thickness dependent on temperature and pressure Flanges  Standard Size to fit on Cylinder

11.  According to the ASME standards for pressure vessel design a 5/8” cylinder thickness was required  Fiber insulated heater temperature graph from Zircar Ceramics 11 Cylinder Thickness

12. Slip-On Flanges  Size based on standard flange size to fit around pipe Blind Flanges  A thickness of 3.25” was chosen based on the temperature and pressure they will see 12

13.  20 Bolts are used on each side of the vessel  Special high temperature gaskets are used to seal the vessel 13

14. In order to analyze the stresses seen by each component of the vessel, a computer simulation was performed using finite element analysis software. 14

15. We need a viewing window for:  Conducting Testing  Observing Equipment 15 A burst disk will be added for safety purposes

16.  Fabricate burst disk and window  Perform Hydrostatic assessment  Complete temperature analysis to determine requirements for insulation 16

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