Sludge experts aim to tackle safe disposal of nuclear waste

The centre has teamed up with Sellafield Ltd to clean up radioactive waste produced by the UK nuclear industry.

Sludge wastes have built up at nuclear power plans such as Sellafield after years of operation and the experts from Leeds will provide the plant’s nuclear engineers with information on the sludge that needs to be removed.

The sludge is largely derived from corroded fuel rod casings and waste from reprocessed fuel. Open-air facilities can also have dust, dirt and debris mixed in the sludge.

The team will attempt to interpret the behaviour of the sludge wastes that have accumulated at the bottom of water-filled waste storage tanks and cooling ponds using remote monitoring techniques that will allow it to sample the sludge from a distance.

Traditionally, video footage of bell jar tests has been used to determine characteristics of a particular material. This involves putting a glass jar at the bottom of a storage tank and sucking up material. Scientists then try to analyse the sedimentation/settling rate of the material from the video recording in order to determine what they are dealing with.