Over 80% of the UK’s current nuclear fleet are graphite-moderated reactors. In addition to moderating the energies of neutrons in the fission process, the graphite core provides structural support, contains the fuel and control rods and allows for coolant flow. The graphite blocks are subject to high levels of neutron irradiation resulting in chemical and physical property changes, which in turn affect neighbouring reactor components. The lifetime of such reactors is therefore primarily limited by the performance of the irreplaceable graphite within the working reactor, so an accurate measure of its condition is essential for economic success and plant safety. Helen Freeman's lecture discussed the research which has been done to understand these mechanisms at a range of length scales.
Innovative approaches to optimise the management of higher activity radioactive wastes, 17 September 2014
This talk described a range of innovative approaches to optimise the management of higher activity radioactive wastes and will provide an update on the work of Radioactive Waste Management Limited (RWM).
Jules Horowitz Reactor, 6 March 2014
Following the 2014 AGM, the Nuclear Industry Group was pleased to welcome David Farrant from NNL. David presented the UK contribution to the Joules Horowitz reactor, construction of which is well underway and is expected to complete in 2018.
From Fission to Fuel Gone, 20 November 2014
CONSORT, the last civil research reactor in the UK, shut down for the final time in December 2012. The reactor, owned and operated by Imperial College London, had for nearly 50 years been used for teaching and research in many fields of nuclear science and technology, such as reactor physics, reactor engineering, neutron physics, solid state physics, radiochemistry and activation analysis. But, now the neutrons have ceased their toil, what’s left for the reactor? The talk discussed the first significant stage in the decommissioning of the reactor: defueling. This was a major activity as the reactor had never been designed to have a refuelling system, so it required a new installation. The talk covered the design, installation and commissioning of the defueling equipment, the regulator interactions and the successful outcome of the project.