Swelling of beryllium at high temperatures under large doses of irradiation (in Russian)
We present experimental data that characterize the behavior of various grades of beryllium subjected to high integrated neutron fluxes and high irradiation temperatures. Post-irradiation densities and structures of samples were determined. In analyzing the results, it can be concluded that, during high- temperature irradiation, the density of beryllium decreases, the decrease in density being proportional to the integrated neutron flux and the irradiation temperature. Moreover, the change in density depends significantly on the kind of material. For mono- and bicrystal beryllium it is less than for cermet beryllium; the swelling of the latter, in turn, increases with size of initial particles. Results of structural studies indicate that the change in cermet beryllium density is to a great extent determined by the rate of coalescence of pores in boundary regions, and that coalescence increases with size of grains. Finally, the results present a picture of density change dose dependence in hot-pressed beryllium for the temperature range of practical interest (600 to 700 deg C).
- Research Organization:
- Scientific Research Institute of Atomic Reactors (NIIAR), Dimitrovgrad (Russia)
- Sponsoring Organization:
- USDOE
- NSA Number:
- NSA-29-003101
- OSTI ID:
- 4403567
- Journal Information:
- Soviet Atomic Energy, Journal Name: Soviet Atomic Energy Journal Issue: 3 Vol. 35; ISSN 0038-531X
- Country of Publication:
- Country unknown/Code not available
- Language:
- Russian
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