RADIATION EFFECTS ON THE OXIDATION RATE AND ON OTHER CHEMICAL PROPERTIES OF GRAPHITE [report]

G.R. Hennig, G.J. Dienes, W. Kosiba
1958 unpublished
Radiation effects on graphite have been studied in considerable detail because the extensive use of graphite in nuclear reactors requires a knowledge of these effects. Furthermore, the radiation induced property changes are larger in graphite than in most other materials and therefore facilitate a detailed study of the mechanisms involved. The properties of graphite are altered by irradiation with fast particles because these produce various lattice defects such as vacancies, interstitial
more » ... interstitial atoms, ions, clusters of both, and possibly dislocations. The relative importance of these various defects in changing the physical properties have been evaluated with reasonable success in previous reports.(1> 2, 3, 4, 5) in the present report, a similar evaluation of chemical property changes will be attempted. Particular attention will be given to the burning rate which is of paramount practical importance. The studies have been carried out independently at Brookhaven National Laboratory (BNL) and Argonne National Laboratory (ANL). Practical considerations were stressed at BNL, where the majority of the experiments on artificial, reactor grade graphite were carried out. At ANL, graphite single crystals and the effects of specific chemical agents other than oxygen, such as ozone, atomic oxygen, halogen, etc., were studied. Several other studies of irradiation effects on graphite oxidation have already been published. Hurst and Wright,'°/and Sheard(^)and co-workers
doi:10.2172/4308129 fatcat:kyad3d56abguvinasry5mqjxg4