1 / 23

Maurits Heijna

The INNOGRAPH-1C low dose irradiation experiment extending the HTR graphite materials properties curves at 750°C. Maurits Heijna. INGSM 15-18 September 2014 Hangzhou. European HTR graphite program. Goal of INNOGRAPH irradiations :

terena
Download Presentation

Maurits Heijna

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. The INNOGRAPH-1C low dose irradiation experimentextending the HTR graphite materials properties curves at 750°C Maurits Heijna INGSM 15-18 September 2014 Hangzhou

  2. European HTR graphite program • Goal of INNOGRAPH irradiations: • Get design curves of modern nucleargraphitegradesand select best candidatefor (V)HTR • Addtounderstanding of graphiteirradiationbehaviour 2001-2006 2006-2011 2011-2015 (V)HTR: (Very) High Temperature Reactor

  3. INNOGRAPH irradiation experiments

  4. INNOGRAPH irradiation experiments INNOGRAPH-1C: low doseirradiation at 750°C

  5. Graphite grades in INNOGRAPH Variation in manufacturing process, coke, and grain size

  6. INNOGRAPH experiment design • 8 drums to hold samples • Geometry allows grain orientation identification • In the order of 180-220 samples per experiment • Each experiment contains 24 thermocouples and 9 dosimeter sets

  7. INNOGRAPH experiment design • INNOGRAPH-1B and -2B have been assembled in the NRG hot-cells • Samples include irradiated samples from INNOGRAPH-1A and -2A • INNOGRAPH-1C: virgin samples only, table top assembly

  8. INNOGRAPH-1C irradiation • 3 cycles in high flux position in High Flux Reactor (HFR, 45 MW) • Helium gas environment

  9. Irradiationtemperature control On-linetemperature control by gas mixture control andvertical displacement unit

  10. Post-Irradiation Examination Sample recovery Drum recovery Measurements • PIE measurements: • Dimensional change • Mass & density • Young’s modulus • Thermal conductivity • Thermal Expansion • Measurement set-ups in Box and Hot Cell

  11. Volume change (Tirr=750°C) Extrusion Iso-moulding

  12. Volume change (Tirr=750°C) Extrusion Iso-moulding

  13. DynamicYoung’s Modulus Extrusion Iso-moulding Measured by velocity-of-sound

  14. DynamicYoung’s Modulus Extrusion Iso-moulding Measured by velocity-of-sound

  15. DynamicYoung’s Modulus Extrusion Iso-moulding Measured by velocity-of-sound

  16. Thermalexpansion Extrusion Iso-moulding Measurement range used: 30°C-750°C

  17. Thermal expansion Extrusion Iso-moulding Measurement range used: 30°C-750°C

  18. Thermalexpansion Extrusion Iso-moulding Measurement range used: 30°C-750°C

  19. Thermalconductivityvstemperature Measuredby Laser Flash Analysis (LFA)

  20. Thermalconductivityvsdpa Extrusion Iso-moulding Measured at 750°C

  21. Thermalconductivityvsdpa Extrusion Iso-moulding Measured at 750°C

  22. Thermalconductivityvsdpa Extrusion Iso-moulding Measured at 750°C

  23. Conclusions • Materialsproperties curves at 750°C extendedto low dpafor HTR graphitegrades • Little happens at low dpa • Volume change • Althoughindicativeforbehaviour at higherdose • A lot happens at low dpa • CTE, DYM, thermalconductivity • Tobeanswered: whatgrade is best for (V)HTR?

More Related