- Tytuł:
- Formation of Nanostructures in UO$\text{}_{2}$ Fuel at High Burn-ups
- Autorzy:
-
Szuta, M.
Bocar, I. - Powiązania:
- https://bibliotekanauki.pl/articles/2035481.pdf
- Data publikacji:
- 2002-08
- Wydawca:
- Polska Akademia Nauk. Instytut Fizyki PAN
- Tematy:
-
25.85.Ec
66.30.Lw - Opis:
- In the present paper it is assumed that above a limiting value of fission fluency (burn-up) a more intensive process of irradiation induced chemical interaction occurs. A significant part of fission gas product is thus expected to be chemically bounded in the matrix of UO$\text{}_{2}$ fuel. The fission gas atoms substituting, for example, uranium atoms in the crystallographic lattice can form weak facets. At a certain saturation condition, division of the grains can occur at the weak facets and the increase in fission-gas-products release may be expected. The fact that the process of grain division for high burn-ups (70-80 MWd/kgU) forms an extremely fine structure up to a temperature as high as 1100$\text{}^{º}$C and simultaneously the observed decrease in fission gas concentration in the fuel supports this concept. The analysis of fission gas concentration change due to the formation of nanostructures in UO$\text{}_{2}$ fuel at high burn-ups in terms of total surface area change in a function of burn-up and knock-out process is presented.
- Źródło:
-
Acta Physica Polonica A; 2002, 102, 2; 207-213
0587-4246
1898-794X - Pojawia się w:
- Acta Physica Polonica A
- Dostawca treści:
- Biblioteka Nauki
Artykuł