Abslracl. In its 1990 rmommendations, ICRP published information on the fatal cancer risk of chronic exposure to radiation. Calculations of the same form were repeated in a report by the first author using health effeds information specific to a UK population. For wnstant annual doses over a complete lifetime, the UK estimates are broadly consistent with those given by ICRP and BEIR. However, because differences exisi in the methodologies used, this may not be true of more realistic exposure situations. For the purpose of individual risk assessments, this paper gives some additional information on age-and sex-related organ risks for various tissue groups. Furthermore, a simple approach is presented for calculating fatal cancer r k bfor protracted exposure at different ages, and over different lengths of time.

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It was as early as the 1980s that A V Gurevich and his group proposed a theory to explain the magnetosphere of radio pulsars and the mechanism by which they produce coherent radio emission. The theory has been sharply criticized and is currently rarely mentioned when discussing the observational properties of radio pulsars, even though all the criticisms were in their time disproven in a most thorough and detailed manner. Recent results show even more conclusively that the theory has no internal inconsistencies. New observational data also demonstrate the validity of the basic conclusions of the theory. Based on the latest results on the effects of wave propagation in the magnetosphere of a neuron star, we show that the developed theory does indeed allow quantitative predictions of the evolution of neutron stars and the properties of the observed radio emission.

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