Microstructure and molten salt impregnation characteristics of a micro-fine grain graphite for use in molten salt reactors
Source abstract
Abstract
Abstract The microstructure and molten salt impregnation characteristics of a micro-fine grain isotropic graphite ZXF-5Q from Poco Inc. was investigated. The microstructural characteristics of the pores caused by gas evolution, calcination cracks, Mrozowski cracks, and the crystal structure were characterized by optical microscopy, mercury porosimetry, helium pycnometry, transmission electron microscopy, X-ray diffraction and Raman spectroscopy. Results show that the ZXF-5Q has uniformly-distributed pores caused by gas evolution with very small entrance diameters (∼0.4 μm), and numerous lenticular Mrozowski cracks. Molten salt impregnation with a molten eutectic fluoride salt at 650 °C and 1, 3 and 5 atm, indicate that ZXF-5Q could not be infiltrated even at 5 atm due to its very small pore entrance diameter. Some scattered global salt particles found inside the ZXF-5Q are possibly formed by condensation of the fluoride salt steam during cooling.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Graphite, nuclear technology, radiation studies · Advancements in Battery Materials · Fiber-reinforced polymer composites
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (30)
Show source-provided references
1. Nightingale · 1962
2. Burchell · 1999
3. Reactor graphite10.1023/A:1024184802515 ↗
4. Simmons · 1965
5. Haag · 2005
6. Radiation defects in graphite[J]10.1080/14786430701210023 ↗
7. USDOE. A Technology Roadmap for Generation IV Nuclear Energy Systems [R]. GIF-002-00, 2002.
8. Rosenthal M W, Haubenreich P N, Briggs R B. The development status of molten –salt breeder reactors [R]. ORNL-4812,1972.
9. Briggs R B. MSRE program semi annual progess report [R]. ORNL-3708, 1964.
10. Ketsten P R. Graphite behavior and its effects on MSBR perform [R]. ORNL-TM-2136, 1969.
11. McCoy H E, Weir J R. Materials development for molten salts breeder reactors [R]. ORNL-TM-1854, 1967.10.2172/4355631 ↗
12. The effect of high fluence neutron irradiation on the properties of a fine-grained isotropic nuclear graphite [J]10.1016/0022-3115(96)00005-0 ↗
13. The effect of neutron irradiation damage on the properties of grade NBG-10 graphite [J]10.1016/j.jnucmat.2007.05.021 ↗
14. Sealing nuclear graphite with pyrolytic carbon [J]10.1016/j.jnucmat.2013.06.035 ↗
15. Protection of nuclear graphite toward liquid fluoride salt by isotropic pyrolytic carbon coating [J]10.1016/j.jnucmat.2013.09.015 ↗
16. SiC coating: An alternative for the protection of nuclear graphite from liquid fluoride salt [J]10.1016/j.jnucmat.2014.01.034 ↗
17. Preparation of binderless nanopore-isotropic graphite for inhibiting the liquid fluoride salt and Xe135 penetration for molten salt nuclear reactor [J]10.1016/j.carbon.2014.07.022 ↗
18. Characterization of the effects of 3-MeV proton irradiation on fine-grained isotropic nuclear graphite [J]10.1016/j.carbon.2014.05.034 ↗
19. Protection of nuclear graphite toward fluoride molten salt by glassy carbon deposit [J]10.1016/j.jnucmat.2008.11.032 ↗
20. Microcracks in nuclear graphite and highly oriented pyrolytic graphite (HOPG) [J]10.1016/j.jnucmat.2008.07.012 ↗
21. Microstructural characterization and pore structure analysis of nuclear graphite [J]10.1016/j.jnucmat.2011.05.053 ↗
22. Anisotropy of thermal expansion and internal stresses in polycrystalline graphite and carbons [J]
23. The role of porosity in the accommodation of thermal expansion in graphite [J]10.1016/0022-3115(62)90194-0 ↗
24. Comparison of 3 MeV C(+) ion-irradiation effects between the nuclear graphites made of pitch and petroleum cokes [J]10.1016/j.jnucmat.2008.08.001 ↗
25. Raman spectrum of graphite [J]10.1063/1.1674108 ↗
26. Raman-spectroscopic characterization of graphites- a reevaluation of spectra/structure correlation [J]10.1016/0008-6223(93)90091-N ↗
27. Raman-spectroscopic characterization of some commercially available carbon-black materials [J]10.1016/0008-6223(95)00117-V ↗
28. Studying disorder in graphite-based systems by Raman spectroscopy [J]10.1039/B613962K ↗
29. Characterization of diamond films by raman-spectroscopy [J]10.1557/JMR.1989.0385 ↗
30. Interpretation of Raman spectra of disordered and amorphous carbon [J]10.1103/PhysRevB.61.14095 ↗