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Break-up testing of waste-form materials

  • M. P. Metcalfe (a1), W. Koch (a2) and G. Turner (a3)

Abstract

The Nuclear Decommissioning Authority (NDA) is developing a safety case for the long-term management of higher activity wastes. This includes safety assessments of transport to and operations at the repository. One of the main faults and hazards to be considered is waste package response to impact accidents.

The criteria of impact performance for waste packages are based upon activity release of particulates generated from the break up of the waste form during impact. The NDA approach to impact performance is based upon waste package response from finite element modelling in combination with break-up tests.

Previous break up research commissioned by the NDA has concentrated on commercial graphite and glass samples. These extended studies, undertaken by the National Nuclear Laboratory in collaboration with the Department of Aerosol Technology of the Fraunhofer Institute of Toxicology and Experimental Medicine, provide break-up data specific to nuclear facilities and waste materials. These include archived unirrradiated graphite used to construct Magnox reactor cores and reflectors, simulant high level waste glass, selected grout formulations and selected metal-in-grout formulations.

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Copyright

© [2012] The Mineralogical Society of Great Britain and Ireland. This is an open access article distributed under the terms of the Creative Commons Attribution (CC BY) licence (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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References

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Lange, F., Martens, R., Nolte, O.R., Koch, W., Lödding, H. and Hörmann, E. (2003) Improvement of the radiological and experimental basis to further develop the requirements of the IAEA transport regulations for LAS/SCO materials. Report to the Commission of the European Communities.
Lange, F., Martens, R., Nolte, O.R., Lödding, H., Koch, W., Hörmann, E. (2007) Testing of packages with LSA materials in very severe mechanical impact conditions with measurements of airborne release. Packaging, Transport, Storage & Security of Radioactive Materials, 18, 5971.
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Nolte, O.R. (2005) Determination of break-up and airborne release for different cemented materials when subject to mechanical impact for United Kingdom Nirex Limited. Fraunhofer-ITEM Report 1129331, NDA Livelink Reference Number: 6244888.
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