The inspection of safety-critical components in the nuclear power industry depends on procedures that can detect defects to a given threshold of severity; the acceptance process for this is known as inspection qualification. Inspection qualification in the UK is a highly developed formal activity, and is representative of the best practice in the world. However it can be very conservative if there is uncertainty in the expected measured response. A vital example is the scattering of ultrasound from the tips of rough cracks, such as thermal fatigue cracks or stress corrosion cracks. Ultrasound scattering from crack tips is widely exploited to measure crack sizes, but while the nature of the scattering is well understood for smooth cracks, scattering from the tips of rough cracks can differ significantly, and is not readily predictable. Consequently the qualification of ultrasound inspections for rough cracks has to be subject to severely conservative assumptions, and even so there remains a risk of misinterpreting findings. This project aims to bring understanding to the nature of the scattering, and to develop predictive modelling tools, such that these conservative assumptions can be safely eroded and the reliability of inspections improved. This will enable industry to reduce the costs of manufacturing and repairing, and down-time from outages, as well as improving confidence in the safe operation of safety-critical plant. The project will build on a strong UK heritage of the knowledge of ultrasound scattering, including recent work by the proposers on the stochastic nature of wave reflections from rough surfaces. The key aim is to deliver a new analytical approach that will predict the statistically expected scattering from the tips of cracks of given characteristics of roughness. The work will also include experimental investigation of real cracks and numerical modelling studies. The new ideas will be applied to the primary ultrasound inspection techniques of Time-of-Flight-Diffraction, Pulse-Echo, and array imaging. The work will be undertaken as a collaboration between researchers in Mechanical Engineering and in Mathematics at Imperial College. The proposal is being submitted within the UK Research Centre in NDE (RCNDE) to its targeted research programme. The proposal has been reviewed internally by the RCNDE, approved by the RCNDE board, and supported financially by five RCNDE industrial members.

In order to maintain European nuclear operations, expertise in nuclear and radiochemistry (NRC) is of strategic relevance. Besides the obvious needs of NRC skills in the context of nuclear power and assessment of disposal options for nuclear waste there are many other applications. This includes radiologic diagnostics and therapy, unthinkable without radiopharmaceutical chemistry, dating in geology and archaeology, (nuclear) forensics and safeguard operations, radiation protection including radioecological assessments of releases and legacies and last but not least basic research e.g. on super heavy elements. The MEET-CINCH project will counteract the massive lack of NRC expertise by three actions. A teaching package for high schools and a MOOC on NRC for general public are built in order to attract young persons to the NRC field and convey them its fascination and relevance. Two additional actions focus on vocational training and (university) education. MEET-CINCH will develop completely new education and training approaches based on remote teaching and the flipped classroom concept including and further developing material generated in the CINCH I and CINCH II projects, such as the NucWik platform and the remote controlled RoboLab experiments. MEET-CINCH will provide ECVET course modules in an e-Shop adapted to the needs of end-users which have been surveyed in the previous projects. After the end of MEET-CINCH the e-shop will be continuously operated by the NRC-network as part of a sustainable European Fission Training Scheme (EFTS). The consortium includes 13 partners from ten European member states; both academia and nuclear laboratories are represented. All partners are experienced in conducting training and education. Networking on national and European level will be an important part of the project, facilitated by having ENEN as one of the partners and by having structural links with other Euratom projects, the EuCheMS DNRC and the NRC-network.

The overarching goal of this project is to establish the technological potential, through a proof - of - concept study, of an entirely new family of glassy materials which could safely and stably incorporate high levels of CO2 by locking it away within the structure of the material in a stable form that is resistant to air, heat and light. In doing so it is believed this will present multiple new properties and in so doing this will enable transformative industrial changes in the way we manufacture, use, recycle and think about glass. There are three main pathways to academic and commercial impact: (1) UK glass industry and community (the primary route); (2) Multiple UK manufacturing sectors, specifically electronic devices and photonics; and (3) UK nuclear industry, specifically waste immobilisation and site license companies. Carboglass could provide multiple new innovation platforms for advanced materials and manufacturing technologies; carbon capture and storage; nuclear decommissioning; and energy and CO2 emissions reduction, thereby impacting upon policy, health and quality of life; delivering the capability to disrupt existing business models and contributing towards a more resilient, productive and prosperous nation. This research could lead to new technologies that provide the UK glass industry with CO2 emissions savings of up to 50% (1.25MT/yr) and increase resource efficiency by up to 20% (1 MT/yr, saving £100M/yr). It could also provide a new path for treatment of carbon-rich radioactive wastes, and could become a leading carbon capture and storage (CCS) technology. This disruptive development could lead to new high-skilled UK jobs and offer a technology platform for uptake by other industries. The proposed research will take the form of 3 work packages (WP's) that will lead to proof-of-concept, as follows: WP1. CO2 incorporation (Months 1-20). Determine key chemical, structural and processing factors governing CO2 incorporation in materials. Materials incorporating CO2 will be produced. Outcomes: relations mapped in model systems, boundaries defined. WP2. Composition / structure / property relations (Months 3-24). Map relations in model materials with focus on CO2 incorporation and physical / chemical properties. Outcomes: fundamental understanding of effects of CO2 incorporation on material properties and structure achieved. WP3. Carboglass technology development (Months 12-24). Build / disseminate understanding of research needs to enable development of Carboglass technology towards high volume manufacturing. Outcomes: clear understanding of research needs for development of Carboglass technology, with initial upscaling designs disseminated widely to academic and industrial partners. Public benefits of this research will include improved environment and quality of life (lower CO2 emissions and energy use; safer nuclear waste, new functional materials leading to new products and processes); disruption of business models (UK jobs and wealth creation); and raised public interest in science and technology. Carboglass represents an opportunity for the UK to lead the world in new, clean and green technologies and simultaneously provides multiple new pathways for a resilient, productive and healthy UK.

One of the most pressing problems facing society today is the management of existing and future waste forms arising from nuclear energy production. Here, the redox chemistry of the actinide elements plays a crucial role in many aspects of nuclear fission including safe disposal strategies and new recovery and recycling routes. Understanding the chemistry of actinides in engineered environments is imperative for the management of existing and future fission products (nuclear waste) arising from nuclear power production, particularly for underground geological disposal. In particular, the redox chemistry of neptunium, a key radionuclide found in appreciable quantities in high level waste is complex, changeable and currently not well understood. Over the lifespan of the proposed geological disposal facility, one of the principal hazards is a change in chemistry of neptunium that may result in leaching from the repository, breaching primary containment and entering the engineered environment. Due to the particular complex redox and chemical speciation of neptunium, crucial mechanistic information on redox chemistry and speciation that affects its interactions with engineered and natural encapsulating materials including the host rock and backfill material is lacking and remains one of the principal chemical challenges facing this field. In this feasibility study, we will address the prospect of using one and two photon fluorescence and phosphorescence spectroscopy and microscopy as a non-destructive technique to address this problem. We aim to visualise, locate and spatially map the different oxidation states of neptunyl that can co-exist in solution in model conditions using well defined complexes and aqua ions in with the ubiquitous geologically relevant minerals silica, alumina and calcite at previously unseen levels of detail (sub micrometer resolution). We have recently demonstrated that neptunyl(V) and (VI) emission occurs in the green and blue regions of the electromagnetic spectrum and are equally as intense as the uranyl(VI) ion, whose optical properties are well known and have been used by us for fluorescence and phosphorescence microscopy imaging. This means that both oxidation states can be detected simultaneously so that highly sensitive, informative three-dimensional imaging can be used to understand neptunyl geochemistry below the micron scale. This will add much needed important information to the safety case for nuclear waste disposal in a range of heterogeneous systems.