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Oxon, United Kingdom

Burch S.F.,ESR Technology Ltd
Non-Destructive Testing Conference 2010, NDT 2010 | Year: 2010

The comparatively new technology of computed radiography (CR) for NDT imaging has a number of advantages over traditional film-based radiography including reduced exposure times, and greater dynamic range. In addition, it does not require facilities for the development of radiographic film, which can be difficult to install and maintain, given the often restricted deck facilities space in an offshore environment. However the technology associated with CR is substantially more complex than film, and, in the absence of any internationally recognised standards for in-service radiographic inspection, the quality of the resulting CR images can be variable. To improve the quality control of this form of inspection, the HOIS JIP has developed a recommended practice covering CR for the in-service inspection of pipes for wall loss type flaws (corrosion, erosion). This project involved a series of experimental trials to first develop and then validate the recommendations, and also quantitatively compare the characteristics of different commercially available CR systems. The results of the CR trials undertaken during this project and the main recommendations of the recommended practice are described. © (2010) by the British Institute of Non-Destructive Testing All rights reserved. Source

Lee R.,ESR Technology Ltd | Gower M.,National Physical Laboratory United Kingdom | Lodeiro M.,National Physical Laboratory United Kingdom | Sanderson A.,University of Surrey | And 2 more authors.
Advanced Composites in Construction 2013, ACIC 2013 - Conference Proceedings | Year: 2013

The IMAJINE Project (Innovative Multi-Materials Jointing Integrity Engineering) was a Technology Strategy Board Collaborative R&D Project. The primary aim was to develop structural health monitoring and integrity assessment procedures for joint durability under the application of static and fatigue loading and environmental exposure. Four industrial case studies were considered including wind turbine blades, beam and plate strengthening, composite pipe repairs and train cab components. This paper presents some of the main findings of the project in terms of lessons learnt and guidelines for inspection and monitoring of bonded composites used in a wide range of structures. © 2013, NetComposite Limited. Source

Cruse H.A.,UK Health and Safety Laboratory | Buston J.E.H.,UK Health and Safety Laboratory | Vechot L.N.,UK Health and Safety Laboratory | Tickle G.A.,ESR Technology Ltd | Rowlands R.,UK Health and Safety Executive
Process Safety and Environmental Protection | Year: 2011

This paper describes part of a programme of work undertaken at the Health and Safety Laboratory (HSL) to investigate the behaviour of selected water-reactive chemicals. Following an accidental release, such substances react exothermically with any water present, generating acidic vapours. The STAWaRS (Source Term Assessment of Water Reactive Substances) software was developed for the Health and Safety Executive (HSE) by ESR Technology to model this complex process. The aims of the study described here were to provide experimental validation of the heats of hydrolysis used within STAWaRS, and to perform sensitivity studies on selected STAWaRS input parameters. The heat of hydrolysis of acetyl chloride was measured and showed good correlation with the value used within STAWaRS. Some of the variables that influence the severity of acetyl chloride spills are examined, with reference to predictions made by the STAWaRS model. The heats of hydrolysis of titanium tetrachloride previously measured at HSL are also discussed, and the effect of adopting these experimentally derived values for modelling spills is shown for a hypothetical land use planning case. This study demonstrates the importance of using experimentally validated values for STAWaRS input parameters. Crown Copyright © 2011 Published by Elsevier B.V. on behalf of The Institution of Chemical Engineers. All rights reserved. Source

Gill S.P.A.,University of Leicester | Lewis M.W.J.,ESR Technology Ltd
Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology | Year: 2015

A quantitative method for assessing the influence of steel cleanliness on the fatigue life of rolling bearing raceways is presented. The approach systematically accounts for the effect of the highly variable stress state within raceways. Finite element analysis is used to determine the stress state in the bearings. A fracture mechanics model for the safe stress amplitude as a function of inclusion size is employed from Lewis and Tomkins. The size and number of large inclusions in a large volume of steel are estimated by the Generalised Pareto Distribution. These three elements are combined to determine the failure probability of the raceway in an example rolling bearing. A sensitivity analysis to the various microstructural input parameters is conducted. It is found that the size distribution of the larger inclusions is the most important factor in controlling the fatigue resistance of rolling bearings, and that residual stresses must be considered to produce realistic predictions. © 2015 Institution of Mechanical Engineers. Source

Coppo P.,SELEX Galileo | Ricciarelli B.,SELEX Galileo | Brandani F.,SELEX Galileo | Delderfield J.,Rutherford Appleton Laboratory | And 13 more authors.
Journal of Modern Optics | Year: 2010

SLSTR is a high accuracy infrared radiometer which will be embarked in the Earth low-orbit Sentinel 3 operational GMES mission. SLSTR is an improved version of the previous AATSR and ATSR-1/2 instruments which have flown respectively on Envisat and ERS-1/2 ESA missions. SLSTR will provide data continuity with respect to these previous missions but with a substantial improvement due to its higher swaths (750 km in dual view and 1400 km in single view) which should permit global coverage of SST and LST measurements (at 1 km of spatial resolution in IR channels) with daily revisit time, useful for climatological and meteorological applications. Two more SWIR channels and a higher spatial resolution in the VIS/SWIR channels (0.5 km) are also implemented for a better clouds/aerosols screening. Two further additional channels for global scale fire monitoring are present at the same time as the other nominal channels. © 2010 Taylor & Francis. Source

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