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Regulatory Reviews of Assessments of Deep Geologic Repositories : Lessons Learnt
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ISBN: 9264058869 9786610033805 1280033800 9264082182 Year: 2000 Publisher: Paris : OECD Publishing,

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Abstract

Integrated performance assessments (IPAs) of radioactive waste repositories deep underground are made at different stages of repository development in order, for example, to allow full-scale development, to provide feedback to R&D, and to test and develop review capability. IPA studies must be acceptable to a wide range of stakeholders and are one of the bases for dialogue amongst regulators and implementers of disposal facilities. The goal of the IPAG-2 study was to examine the experience of regulatory reviews of IPAs, from both the implementer and regulator points of view. Ten implementer and seven regulatory organisations participated. This report presents the lessons learnt from their review experiences, and provides recommendations to aid future regulatory decision making.

Scenario Development Methods and Practice : An Evaluation Based on the NEA Workshop on Scenario Development - Madrid, May 1999
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ISBN: 1280034459 9786610034451 9264193537 9264187227 Year: 2001 Publisher: Paris : OECD Publishing,

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Analysis of the long-term safety of radioactive waste repositories, using performance assessment and other tools, is required prior to implementation. The initial stage in developing a repository safety assessment is the identification of all factors that may be relevant to the long-term safety of the repository and their combination to form scenarios. This must be done in a systematic and transparent way in order to assure the regulatory authorities that nothing important has been forgotten. This report is a review of developments in scenario methodologies based on a large body of practical experience in safety assessments. It will be of interest to radioactive waste management experts as well as to other specialists involved in the development of scenario methodologies.

Using Thermodynamic Sorption Models for Guiding Radioelement Distribution Coefficient (Kd) Investigations : A Status Report
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ISBN: 1280034416 9786610034413 926419293X 9789264192935 9264186794 Year: 2001 Publisher: Paris : OECD Publishing,

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A general consensus has been reached among technical experts that high-level radioactive waste can safely be disposed of in deep geological repositories. Safety studies are carried out to evaluate the overall capacity of a particular disposal site to confine waste and minimise radioactive releases. Since the principal way in which radioactive elements might eventually reach the biosphere is by transport of dissolved radionuclides in groundwater, the safety study calculations must be able to estimate their rate of transfer through each of the barriers surrounding the repository. It is well known that, for many radioelements, sorption reactions can lead to a reduction of the amount of radionuclides present in the solution phase. How best to take radionuclide sorption reactions into account in repository performance assessment models is the subject of this book.

Geological Disposal of Radioactive Waste : Review of Developments in the Last Decade
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ISBN: 9246180542 128003419X 9786610034192 9246180540 9264171940 Year: 1999 Publisher: Paris : OECD Publishing,

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The concept of removing long-lived radioactive wastes from the human environment by disposal in deep geological repositories was developed several decades ago. In the intervening years, research efforts world-wide have increased our knowledge and understanding of how underground disposal systems will function over very long periods of time. Significant progress has also been made towards implementation of such facilities. There have, however, been delays in the disposal programmes of several countries. This report is a review of developments in the past decade. The primary sources of information are the answers to a questionnaire provided by waste management organisations represented in the NEA Radioactive Waste Management Committee (RWMC). The latter is an international forum of senior specialists from safety authorities, waste management agencies, R&D institutions and policy-making bodies.


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Proceedings of the Workshop on Borehole and Shaft Plugging, Columbus, 7th-9th May 1980 = : Compte rendu d'une réunion de travail sur le colmatage des forages et des puits, Columbus, 7-9 mai 1980
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ISBN: 9264021140 9789264021143 Year: 1980 Publisher: Paris : Organisation for Economic Co-operation and Development,

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