May 30, 2023

An advanced blind-tube monitoring instrument to improve the characterization of subsurface radioactive plumes

The blind tube measurement of radiation to determine dose rate as a function of depth in contaminated land is performed currently with Geiger-Müller (GM) tubes on a push-rod cable. The former is installed in a water-proof housing and detects gamma radiation with which to infer the dose, whilst the latter is necessary to provide power […]

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May 30, 2023

Predicting Gamma Dose Rates from Buried Pipelines based on Limited Information

The PhD project will seek to develop robust algorithms to predict gamma dose rates in contaminated pipelines based on limited direct information. The objective is to minimise and, where possible, avoid intrusive sampling and analysis while still acquiring sufficient information to justify management options (e.g. excavation, capping, leaving in situ) The focus will be on […]

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May 30, 2023

Muon Tomography for Monitoring Civil Nuclear Assets

Muons are fundamental charged particles, produced in the atmosphere by cosmic rays. Every second, hundreds of high velocity muons shower each square meter of earth, providing a highly penetrating, naturally abundant, and safe particle source that can be used for passive imaging. One such imaging technique is Muon Scattering Tomography (MST), which uses sandwiches of […]

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May 30, 2023

Field deployment of biomineral technologies for treatment and repair of concrete nuclear infrastructure

Nuclear sites comprise huge volumes of concrete assets, which are exposed to differing environmental conditions resulting in variable mechanisms for, and rates of, concrete degradation. For example, external concrete building facades may be exposed to freeze-thaw and high salinity, whereas some internal concrete structures may be exposed to high temperatures and high levels of radiation. […]

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May 30, 2023

Nanotechnology for effluent treatment and radionuclide assay

This project will build on the work done in the Distinctive consortium, where it was shown that phosphate functionalised paramagnetic iron oxide particles showed a surprisingly large capacity and selectivity for uranium sorption. A first set of research objectives is to clarify further why what appears to be a multi-layer structure has such a large […]

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May 30, 2023

Particle-laden flow characterisation and prediction

Decontamination of legacy ponds and silos is of great importance and stands as a matter of increasing urgency throughout the nuclear industry. In facilities within the UK, waste suspension flows transport legacy material from historic ponds to other interim locations where they are safely stored. However, at present these processes are not as efficient as […]

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May 30, 2023

Characterisation of thermal treatment products

A programme of synthesis of a range of model (lab-scale) thermally treated simulant waste materials will be initiated with the addition of active (e.g. U, Th) or inactive (e.g. Cs, Ce for Pu etc.) radionuclide surrogates. We will liaise with NNL to also obtain products of full-scale Geomelt trials (active or inactive) for appropriate waste […]

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May 30, 2023

Radiation effects on wasteforms

This project will focus on determining how the degree of crystallinity would affect cracking of vitrified High Level Waste (HLW). Radiation is known to affect glass in a variety of ways, for example causing a volume change. This volume change can induce strain which can lead to cracking. Historic work on active glass showed that […]

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