Archive | Case Studies

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Probabilistic treatment of stresses for use in creep-fatigue crack initiation assessments

Research Area: Structural Integrity PI: Mr Nader Zentuti Funders: EDF Energy Contact details: The Challenge For assessing a component operating at high temperatures for creep-fatigue damage which can lead to crack initiation, the stress state during nominal operating conditions is required. These stresses are usually obtained from complex thermal and mechanical FE. However, using […]

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High-Resolution Radiation Mapping to Characterise Contamination

Research Area: Waste and Fuel Management PI: Dr Peter Martin and Mr Dean Connor Partners: Sellafield Ltd. Contact details: and The Challenge Radiological contamination exists at numerous sites worldwide; whether the result of large-scale radiological release events (such as the Fukushima Daiichi Nuclear Power Plant accident in March 2011), following nuclear weapons testing, […]

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Figure 1 - Left -Test set up for impression creep testing on HAZ slices, right – a HAZ slice.

Creep Deformation and Damage During Stress Relaxation in Stainless Steel Weldments Operated at High Temperature

Research Area: Structural Engineering PI: Mr Satyajit Dey Funders: EDF, Atkins Contact details: The Challenge Many engineering steel components used in power generation plants are operated at creep regime temperatures. This means that the steels are susceptible to creep and stress relaxation. It is important to estimate the amount of creep strain accumulation during […]

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Figure 2 - EPR Reactor pressure vessel in the installation process at Oikiluoto (June 2010 – image: Framatome).

ATLAS+ Advanced Structural Integrity Assessment Tools for Safe Plant Operation

Research Area: Structural Engineering PI: Dr Mahmoud Mostafavi Partners: 18 Partners across Europe including VTT Finland, EDF Group, Framatome, and CEA Funders: EU Contact details: Project Website: The Challenge There are 15 nuclear reactors in the UK and many more around Europe. Many of these reactors have been or will be working past […]

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Figure 1 - The Diamond Light Source
(Source: Diamond Light Source)

Improving Life Assessment Procedure for Current and Future Generation Nuclear Power Plants

Research Area: Structural Engineering PI: Prof. David Knowles Partners: EDF Energy Funders: EDF Energy, EU Contact details:;; The Challenge Materials in nuclear power plants operate in extreme conditions (high temperatures and stresses) over lifespans that extend for many decades. The current generation of advanced gas cooled reactor plants have been in service […]

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Figure 1 - sludge retrieval in action. This uses a large vacuum pump to transport the waste into a separate tank elsewhere on the Sellafield site.

In-situ Raman Spectroscopy of Sludge

Research Area: Waste and Fuel Management PI: Prof. Thomas Scott,  University of Bristol Partners: Sellafield Ltd. Contact details: Kate Wyness, The Challenge Currently there are two legacy storage pond facilities based in Sellafield, Cumbria, the largest decommissioning and processing plant in the UK. These facilities were originally built to handle waste from the 1950’s plutonium […]

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Figure 2 - the European Synchrotron Radiation Facility (ESRF), Grenoble, France; where the first single crystal thin film dissolution experiments were performed at beamline BM28.

Storage of Nuclear Fuel: Radiolytic Dissolution at the UO2/H2O Interface

Research Area: Waste and Fuel Management PI: Dr Sophie Rennie Contact details: The Challenge A key problem facing the nuclear industry is the safe and efficient long-term storage of nuclear fuel. The long-lived radiation fields that result from highly radioactive fission products require spent nuclear fuel to be stored over timescales of tens of […]

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PLATINUM – Pulsed Laser Accelerators for the Inspection of Nuclear Materials

Research Area: Waste and Fuel Management PI: Dr Chris Jones Contact details: The Challenge As of 2013 the UK currently stores 120,000 tonnes of Intermediate Level Waste (ILW) nationwide, with a further 190,000 tonnes predicted from decommissioning existing sites. This waste is reprocessed prior to storage in 500 litre stainless steel drums backfilled with […]

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Figure 2 - characteristic FE model showing the evolution of grout cracking as the corrosion—induced volume expansion progresses in the interior of the drum.

Evaluation of Waste Package Degradation Resulting from Metallic Corrosion

Research Area: Waste and Fuel Management PI: Mr Haris Paraskevoulakos Partners: Diamond Light Source Contact details: The Challenge Within the UK, nuclear waste is classified according to the levels of radioactivity in three groups: High Level Waste (HLW), Intermediate Level Waste (ILW) and Low Level Waste (LLW). ILW mostly consists of metallic fragments arisen […]

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