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Modeling of tristructural isotropic (TRISO)-coated particle fuel is being refined in the fuel performance code BISON. New developments include the implementation of an updated set of material properties, TRISO failure mechanisms, fission product diffusion parameters, and the design of a Monte Carlo scheme that allows BISON to calculate the probability of fuel failure within a population of TRISO particles and the subsequent fractional release of key fission products.

Hyraxes of the genus Procavia, referable to P. capensis johnstoni Thomas, have been collected for the first time in northern Mozambique in the course of a zoological expedition organized in 1983 by the National Museum of Natural History of Sofia. This discovery extends notably the distribution of this subspecies which was only known from southern and central Malawi. Moreover, some informations suggest that it could also exist in south-eastern Zambia.Resume. -Des damans du genre Procavia, referables a P. capensis johnstoni Thomas, ont etc collectes pour la premiere fois dans le nord du Mozambique, au cours d'une mission zoologique organisee en 1983 par le Museum National d'Histoire Naturelle de Sofia. Cette decouverte etend considerablement l'aire de distribution de cette sous-espece connue jusque-lä seulement du sud et du centre du Malawi. De plus, des informations laissent ä penser qu'elle serait egalement representee dans le sud-est de la Zambie.

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