Nuclear decommissioning

Nuclear Decommissioning Clean-Up Nuclear Fuel, Equipment Services Nuclear Fuel Disposal Recycling Transportation Services Nuclear Plant Design Services... 

The Dounreay site was established as the site of the UK Fast Breeder Nuclear programme in 1955 and became operational in 1958. It accommodated three reactors, the Materials Test Reactor, (DMTR, 1958-1969), the Dounreay Fast Reactor (DFR, 1959-1977) and the Prototype Fast Reactor (PFR, 1974-1994). With all reactor operations now finished and the reactors already de-fuelled the site is undergoing active decommissioning which is planned to be completed by 2032. The Dounreay site has been cited by UKAEA as being the second biggest nuclear decommissioning challenge in the UK with similar liabilities to those at Sellafield but with smaller waste volumes. 

THE ANALYTICAL IMPACT ON TRITIUM DATA FROM STORING NUCLEAR DECOMMISSIONING SAMPLES UNDER DIFFERENT CONDITIONS... 

The Analytical Impact on Tritium Data from Storing Nuclear Decommissioning Samples 109... 

Since the formation of the Nuclear Decommissioning Authority (NDA) there has been an emphasis on a demonstrable process for prioritisation of remediation work on UK decommissioning sites. As part of this process, the HI has now been re-named the Radiological Hazard Potential (RHP) and is one of five metrics which are combined numerically to produce a prioritisation metric, the Safety and Environmental Detriment (SED), see below. This paper relates only to the RHP. It is a quantitative measure of the potential for a material or plant item to cause harm, but does not address the risk of that harm occurring and has universal application irrespective of facility type. 

Instruction for the Calculation of the Radiological Hazard Potential, Nuclear Decommissioning Authority, 13 July 2006, Document No. EGPR02-W101, Rev. 2. 

Radiochemical methods which allow sequential determination of radionuclides are often desirable for reasons of speed and cost-effectiveness, for example in mixed waste streams or in waste characterization for nuclear decommissioning. Although a variety of methods are in use for the analysis of in concretes, they tend to use large reagent volumes and involve... 

The most obvious application of this method is in waste characterisation associated with nuclear decommissioning, where activated concrete bioshields are a potential source of activity. A core from a bioshield has been analysed using gamma spectrometry, analysis and determination. The core used was too old for any " Ca to be detected, but... 

NUCLEAR DECOMMISSIONING AUTHORITY RESEARCH AND DEVELOPMENT NEEDS, RISKS AND OPPORTUNITIES... 

The Nuclear Decommissioning Authority (NDA) is a non-departmental public body, set up in April 2005 by the UK Government under the Energy Act 2004 to take strategic responsibility for the UK s nuclear legacy. 

Nuclear Decommissioning Authority Research and Development Needs... 

Implementation of the project, which covers 9 technical tasks addressing the essential topics of nuclear decommissioning, was to be approached in two main phases first data collection, then contribution to the elaboration of the decommissioning plan. 

ANS (1983) Nuclear safety criteria for the design of stationary PWR plants , ANSI/ANS 51.1. Bayliss, C. and Langley, K. (2003) Nuclear Decommissioning, Waste Management and Environmental Site Remediation. Elsevier. 

The manuscript has been approved for publication by Magnox Limited and the Nuclear Decommissioning Authority. 

Nuclear decommissioning Planning, execution and international experience... 

Fig. 2 Commercial scale application of the Arvia Process at Trawsfynydd nuclear decommissioning site for the removal and destruction of radioactive oils...

Edited by John Kilner, Stephen Skinner, Stuart Irvine and Peter Edwards Nuclear decommissioning Pianning, execution and international experience Edited by Michele Laraia Nuclear fuel cycle science and engineering... 

Eleven sites have been nominated by either possible operators or the Nuclear Decommissioning Authority (NDA) under the SSA process the sites are listed and details provided in the Draft National Policy Statement for Nuclear Power Generation (Reference 3.5). Of these sites, nine are located adj acent to existing nuclear power stations (either operational or in a decommissioning phase). The other two nominated sites are located on the west coast of Cumbria, i.e., within the wider locality of Sellafield. 

Nuclear Decommissioning Authority (NDA), ENG02, Rev. 2, Companion Document to Integrated Waste Strategy Speeifieation, August 2006. 

Nuclear Decommissioning Authority (NDA), NDA Tech Note 11339711, Generic Design Assessment Summary of Disposability Assessment for Wastes and Spent Fuel Arising from Operation of the Westinghouse APIOOO, October 2009. 

Current UK policy is for the development of national repositories for HLW and ILW. The Nuclear Decommissioning Authority (NDA) have confirmed in the Summary of Disposability... 

The Nuclear Decommissioning Authority intervenes by offering a contract which includes a payment transfer that encourages companies to jointly contribute to risk reduction. 

NDA, 2010. NDA (Nuclear Decommissioning Authority). Geological disposal facility an overview of the generic disposal system safety case. Available from www.nda.gov.uk. Accessed 10/12/2013. 

Martin, C. Guamieri, F. 2012. Nuclear decommissioning and organizational reliability, involving subcontractors in collective action. In SFEN. 

Bringing all this research effort together to build a comprehensive safety case for the final repository, one that reflects best practice from around the world, is one of the tasks assigned to a new organisation. Radioactive Waste Management. RWM was created in April 2014 as a wholly-owned subsidiary of the Nuclear Decommissioning Authority (NDA). It builds on the work of the NDA s former Radioactive Waste Management Directorate. 

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