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Bristol, United Kingdom

Frazer-Nash Consultancy is a professional services firm providing engineering, project management, and procurement advice. The company is based in Dorking, United Kingdom, and has ten other office locations around the country. It was founded in 1971 within the now-defunct Frazer-Nash Group, and is now fully owned by Babcock International Group plc. As of October 2014 it employed 600 people. Wikipedia.

Hindley M.P.,Pebble Ltd | Mitchell M.N.,Pebble Ltd | Erasmus C.,Pebble Ltd | McMurtry R.,Frazer Nash Consultancy | And 3 more authors.
Journal of Nuclear Materials | Year: 2013

This paper presents a methodology that can be used for calculating the probability of failure of graphite core components in a nuclear core design, such as that of the Pebble Bed Modular Reactor. The proposed methodology is shown to calculate the failure of multiple geometries using the parameters obtained from tensile specimen test data. Experimental testing of various geometries is undertaken to verify the results. The analysis of the experimental results and a discussion on the accuracy of the failure prediction methodology are presented. The analysis is done at 50% probability of failure as well as lower probabilities of failure. © 2012 Elsevier B.V. All rights reserved. Source

Wilson D.M.,Frazer Nash Consultancy | Rowley P.N.,Loughborough University | Watson S.J.,Loughborough University
IEEE Systems Journal | Year: 2011

The commercial viability of a marine renewable energy technology is impacted by a range of holistic factors related not only to the performance of the generating device, but also the characteristics of the system-of-systems within which the device operates. In this work, an investment risk assessment methodology is presented that takes account of a wide range of whole-system parameters, and provides a bridge between a device-centric evidence base and the wider systems-level data that is required in order to effectively assess the case for a specific investment. Within the paper, a system modeling framework is presented, and a case study assessment is conducted to illustrate the application of the proposed approach. The results indicate that by considering a proposed scheme in terms of both its efficacy as an operating system, along with specific lifecycle factors from concept to disposal, risks and costs can be identified in a systematic and justifiable manner. In addition, technical factors can be described in terms of their effects on the primary capability of the system, namely to produce electricity at an economically feasible cost whilst maximizing return on investment. © 2010 IEEE. Source

Kulka R.S.,Frazer Nash Consultancy
American Society of Mechanical Engineers, Pressure Vessels and Piping Division (Publication) PVP | Year: 2011

In conventional fracture mechanics assessments, there is often an inadequate treatment of in-plane constraint effects on the apparent toughness of structural components, leading to significant conservatism. Modifications to the Master Curve method, to account for these effects, have previously been suggested. A study of these proposed modifications has identified that less conservative toughness estimates could be made from the analysis of fracture mechanics test specimens. An approach has been developed for allowing a comparison of a variation of fracture toughness values throughout a component, to a variation of the localised effective driving force. Cracked-body finite element analysis has been used to assess fracture test specimens with varying levels of in-plane constraint, to provide fracture mechanics data for use with the approach that has been developed. Copyright © 2011 by ASME. Source

Kulka R.S.,Frazer Nash Consultancy
American Society of Mechanical Engineers, Pressure Vessels and Piping Division (Publication) PVP | Year: 2011

During fracture toughness testing of SEN(B) specimens, an important assumption is that the test specimen is highly constrained. This assumption is ensured by the testing of a deeply cracked specimen, with in-plane and out-of-plane dimensions that are sufficient to guarantee an appropriate level of crack tip stress triaxiality. This condition guarantees that high-constraint fracture toughness values are derived, conservative for use in standard fracture mechanics assessments. In reality, many components have small in-plane or out-of-plane dimensions. It is considered that this could cause a reduction in crack tip constraint of a sufficient amount to increase the effective fracture toughness of the components. However, there is currently limited understanding as to the magnitude of the benefits that could be claimed. Finite element analysis of various thin-width SEN(B) specimens has been undertaken. The knowledge gained can be used to develop fracture mechanics methodology for the testing of thin-width specimens and the subsequent derivation of appropriate toughness values. Copyright © 2011 by ASME. Source

Chadwick A.,Frazer Nash Consultancy
RINA, Royal Institution of Naval Architects - International Maritime Conference 2012, Pacific 2012 | Year: 2012

The endless possibilities that the introduction of UAS into the maritime environment brings is slowly being recognised. The increase in operational use, and in the number of demonstrations of these systems, provides further evidence of how their capabilities may be used to fill capability gaps providing ISR for Force Projection and Force Protection, complementing manned aircraft in their agility, flexibility, and (in some cases) expendability. Integration and interoperability are key, and embarked UAS can provide a fast moving organic capability that deploys and tasks with speed, agility, control and precision. A capability that is independent of host nation support. There is now an expectation from the UAS community that UAS will form part of a nation's maritime air capability and that they have a role to play, both nationally and internationally. In addition, as the use of UAS proliferate, they will have more of a role to play in maritime security. Source

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