Abstract
Infromation concerning the developed amount of radiolytic hydrogen is necessary to obtain radiological safety for the disposal of wasteblocks produced by bituminization of radioactive wastes. Own tests were classified on irradiation of bitumen B45 and bitumen B45-NaNO3-mixture with an external 60Co-source respectively by an incorporated 90Sr/90Y in air and atmosphere of inert gas. As result a hydrogen developing rate of ≈ 10−2 cm3 g−1 Mrd−1 was ascertained for estimating dangers of explosion. The rate of swelling of bitumen blocks was ≈ 2 x 10−3 cm3 g−1 Mrd−1. The time to reach the explosion limit for a closed storage vault was estimated.
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