ICEM07-7109 ON THE ROLE OF H 2 AS AN INHIBITOR OF UO 2 MATRIX DISSOLUTION

ABSTRACT The study of spent fuel behaviour under disposal conditions is usually based on conservative approaches assuming oxidising conditions produced by water radiolysis at the fuel/water interface. However, the presence of H 2 from container corrosion can inhibit the dissolution of the UO 2 matrix and enhance its long-term stability. Several studies have confirmed the decrease in dissolution rates when H 2 is present in the system, although the exact mechanisms of interaction have not been fully established. This paper deals with a radiolytic modelling exercise to explore the consequences of the interaction of H 2 with radicals generated by radiolysis in the homogeneous phase. The main conclusion is that in all the modelled cases the presence of H 2 in the system leads to a decrease in matrix dissolution. The extent of the inhibition, and the threshold partial pressure for the inhibition to take place, both depend in a complex way on the chemical composition of the water and the type of radiation present in the syste

A barrier and techno-economic analysis of small-scale bCHP (biomass combined heat and power) schemes in the UK

bCHP (Biomass combined heat and power) systems are highly efficient at smaller-scales when a significant proportion of the heat produced can be effectively utilised for hot water, space heating or industrial heating purposes. However, there are many barriers to project development and this has greatly inhibited deployment in the UK. Project viability is highly subjective to changes in policy, regulation, the finance market and the low cost fossil fuel incumbent. The paper reviews the barriers to small-scale bCHP project development in the UK along with a case study of a failed 1.5MWel bCHP scheme. The paper offers possible explanations for the project's failure and suggests adaptations to improve the project resilience. Analysis of the project's: capital structuring contract length and bankability; feedstock type and price uncertainty, and plant oversizing highlight the negative impact of the existing project barriers on project development. The research paper concludes with a discussion on the effects of these barriers on the case study project and this industry more generally. A greater understanding of the techno-economic effects of some barriers for small-scale bCHP schemes is demonstrated within this paper, along with some methods for improving the attractiveness and resilience of projects of this kind

Setting up an environmental management system in the food and drink industry

1 CD-ROM in pocket attached to inside back coverAvailable from British Library Document Supply Centre- DSC:3791. 81786V(344) / BLDSC - British Library Document Supply CentreSIGLEGBUnited Kingdo

Reducing material costs in PCB manufacture

Includes bibliographical referencesAvailable from British Library Document Supply Centre- DSC:3791. 81786(396) / BLDSC - British Library Document Supply CentreSIGLEGBUnited Kingdo

Review of Environmental and Health Effects of Waste Management: Municipal Solid Waste and Similar Wastes

The report examines the waste management options for treating municipal solid and similar waste. It focuses, as Defra requested, on the principal types of facilities that are currently used for dealing with such waste in the UK and in Europe and on what the currently available scientific evidence can tell us about their environmental and health effects

Finding and reducing waste in plastics processing

This guide includes a CD ROM in a pocket attached to the rear coverAvailable from British Library Document Supply Centre- DSC:3791. 81786(277) / BLDSC - British Library Document Supply CentreSIGLEGBUnited Kingdo