KOPS - The Institutional Repository of the University of Konstanz

Dismantling of the DIORIT research reactor : Conditioning of activated graphite

Dismantling of the DIORIT research reactor : Conditioning of activated graphite

Cite This

Files in this item

Files Size Format View

There are no files associated with this item.

SIERRA PERLER, Isabel Cecilia, Hans-Frieder BEER, Joachim MÜTH, Andreas KRAMER, 2019. Dismantling of the DIORIT research reactor : Conditioning of activated graphite. In: Journal of environmental radioactivity. 196, pp. 199-203. ISSN 0265-931X. eISSN 1879-1700. Available under: doi: 10.1016/j.jenvrad.2017.07.019

@article{SierraPerler2019-01Disma-45495, title={Dismantling of the DIORIT research reactor : Conditioning of activated graphite}, year={2019}, doi={10.1016/j.jenvrad.2017.07.019}, volume={196}, issn={0265-931X}, journal={Journal of environmental radioactivity}, pages={199--203}, author={Sierra Perler, Isabel Cecilia and Beer, Hans-Frieder and Müth, Joachim and Kramer, Andreas} }

The research reactor DIORIT at the Paul Scherrer Institute was a natural uranium reactor moderated by D<sub>2</sub>O. It was put in operation in 1960 and finally shut down in August 1977. The dismantling project started in 1982 and could be successfully finished on September 11th, 2012. About 40 tons of activated reactor graphite had to be conditioned during the dismantling of this research reactor. The problem of conditioning of activated reactor graphite had not been solved so far worldwide. Therefore a conditioning method considering radiation protection and economic aspects had to be developed. As a result, the graphite was crushed to a particle size smaller than 5 mm and added as sand substitute to a specially developed grout. The produced graphite concrete was used as a matrix for embedding dismantling waste in containers. By conditioning the graphite conventionally, about 58.5 m<sup>3</sup> (13 containers) of waste volume would have been generated. The new PSI invention resulted in no additional waste caused by graphite. Consequently, the resulting waste volume, as well as the costs, were substantially reduced. eng Müth, Joachim 2019-03-18T10:59:33Z Dismantling of the DIORIT research reactor : Conditioning of activated graphite Kramer, Andreas Kramer, Andreas Müth, Joachim 2019-03-18T10:59:33Z Sierra Perler, Isabel Cecilia Beer, Hans-Frieder 2019-01 Sierra Perler, Isabel Cecilia Beer, Hans-Frieder

This item appears in the following Collection(s)

Search KOPS


Browse

My Account