The 12th International Conference on Environmental ... - Events
The 12th International Conference on Environmental ... - Events
The 12th International Conference on Environmental ... - Events
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Sessi<strong>on</strong> 59 Abstracts<br />
6) A SYSTEMATIC PLANNING TOOL FOR ENVIRONMENTAL CHARACTERISATION – 16010<br />
Steven Wilcox, Richard I Wilkins, Martin R Ly<strong>on</strong>s, AMEC (UK)<br />
Many organisati<strong>on</strong>s are currently dealing with l<strong>on</strong>g standing legacy issues in clean up, decommissi<strong>on</strong>ing and demoliti<strong>on</strong> projects.<br />
Industry is required to ensure that all bulk articles, substances and waste arisings are adequately characterised and assigned to<br />
the correct disposal routes in compliance with UK legislati<strong>on</strong> and best practice. It is essential that data used to support waste sentencing<br />
is of the correct type, quality and quantity, and that it is appropriately assessed in order to support defensible, c<strong>on</strong>fident<br />
decisi<strong>on</strong>s that account for inherent uncertainties. AMEC has adopted the Data Quality Objectives (DQO) based methodology and<br />
the software package Visual Sample Plan (VSP) to provide a better, faster, and more cost effective approach to meeting regulatory<br />
and client requirements, whilst minimising the time spent gathering data and assessing the informati<strong>on</strong>.<br />
<str<strong>on</strong>g>The</str<strong>on</strong>g> DQO methodology is based <strong>on</strong> a scientific approach that requires clear objectives to be established from the outset of a<br />
project and that there is a dem<strong>on</strong>strati<strong>on</strong> of acceptability of the results. Through systematic planning, the team develops acceptance<br />
or performance criteria for the quality of the data collected and for the c<strong>on</strong>fidence in the final decisi<strong>on</strong>.<br />
<str<strong>on</strong>g>The</str<strong>on</strong>g> systematic planning process promotes communicati<strong>on</strong> between all departments and individuals involved in the decisi<strong>on</strong>making<br />
process thus the planning phase gives an open and unambiguous method to support the decisi<strong>on</strong>s and enables the decisi<strong>on</strong>makers<br />
(technical authorities <strong>on</strong> the materials of c<strong>on</strong>cern) to document all assumpti<strong>on</strong>s.<br />
SESSION 59 - SAFETY CONSIDERATIONS ASSOCIATED WITH L/ILW MANAGEMENT<br />
1) DEVELOPMENT OF JOINT REGULATORY GUIDANCE ON THE MANAGEMENT OF HIGHER ACTIVITY<br />
RADIOACTIVE WASTES ON NUCLEAR LICENSED SITES - 16095<br />
Michael Bac<strong>on</strong>, Health and Safety Executive (UK); Doug Ilett,Envir<strong>on</strong>ment Agency (UK); Andrew Whittall,<br />
ScottishEnvir<strong>on</strong>ment Protecti<strong>on</strong> Agency (UK)<br />
In 2006 the UK Governments resp<strong>on</strong>se1 to recommendati<strong>on</strong>s by its Committee <strong>on</strong> Radioactive Waste Management (CoRWM)<br />
established, in England and Wales, that geological disposal, supported by safe and secure interim storage, is the preferred route for<br />
the l<strong>on</strong>g-term management of higher-activity radioactive waste (i.e. that which is not suitable for near-surface disposal). It also gave<br />
the resp<strong>on</strong>sibility for delivering the programme for a deep geological repository to the Nuclear decommissi<strong>on</strong>ing Authority (NDA).<br />
<str<strong>on</strong>g>The</str<strong>on</strong>g> Scottish Government has a policy of l<strong>on</strong>g term, near site, near surface safe and secure interim storage.<br />
To support the open and transparent approach promised by Government, the Health and Safety Executive (HSE), the Envir<strong>on</strong>ment<br />
Agency and the Scottish Envir<strong>on</strong>ment Protecti<strong>on</strong> Agency (SEPA) are developing joint guidance <strong>on</strong> the management of higher-activity<br />
radioactive waste to explain regulatory objectives in securing safe and secure interim storage and the associated management<br />
of radioactive wastes. <str<strong>on</strong>g>The</str<strong>on</strong>g> guidance comes in two parts:<br />
• Guidance <strong>on</strong> the regulatory process<br />
• Technical guidance modules<br />
2) MONTE CARLO SIMULATION OF A COMPARTMENT MODEL OF RADIONUCLIDE MIGRATION<br />
AT A RADIOACTIVE WASTE REPOSITORY - 16168<br />
Enrico Zio, Francesco Cadini, Diana Avram, Tommaso Girotti, Politecnico (Italy);<br />
Alfredo Luce, ENEA CR Saluggia (Italy); Alberto Tagli<strong>on</strong>i, ENEA (Italy)<br />
Predicti<strong>on</strong> of radi<strong>on</strong>uclides release is a central issue in the performance assessment of nuclear waste repositories. To this aim<br />
a model of radi<strong>on</strong>uclides migrati<strong>on</strong> through the repository barriers must be set up, accounting for the uncertainties affecting the<br />
process. In this c<strong>on</strong>text, the present paper presents the applicati<strong>on</strong> of M<strong>on</strong>te Carlo simulati<strong>on</strong> to a Markovian modeling framework<br />
proposed in the literature; two cases are presented to highlight the value added by the flexibility of the M<strong>on</strong>te Carlo simulati<strong>on</strong><br />
approach migrati<strong>on</strong>, compartment model, M<strong>on</strong>te Carlo simulati<strong>on</strong>.<br />
3) PRELIMINARY WASTE ACCEPTANCE CRITERA FOR LILW REPOSITORY IN SLOVENIA - 16115<br />
Nadja Zeleznik, ARAO (Slovenia); Dejan Skanata, Enc<strong>on</strong>et <str<strong>on</strong>g>Internati<strong>on</strong>al</str<strong>on</strong>g> (Croatia)<br />
<str<strong>on</strong>g>The</str<strong>on</strong>g> nati<strong>on</strong>al radwaste management agency in Slovenia (ARAO) is under course of site c<strong>on</strong>firmati<strong>on</strong> and designing short-lived<br />
radwaste disposal facility. <str<strong>on</strong>g>The</str<strong>on</strong>g>refore, development of the waste acceptance criteria for disposal started recently. <str<strong>on</strong>g>The</str<strong>on</strong>g> project scope<br />
includes review and analysis a number of references focusing in particular <strong>on</strong> those waste properties and related parameters that<br />
may affect safety of the repository.<br />
<str<strong>on</strong>g>The</str<strong>on</strong>g> waste acceptance criteria for disposal cannot be clearly defined if the site selecti<strong>on</strong> process and repository design are in an<br />
early stage. In such case a request is made that waste acceptance criteria should be anticipated. Such request is logical since the<br />
total waste management cost should be optimized. Namely, predisposal waste management capacity should be established so as to<br />
meet all the requested acceptance criteria (treatment, storage, transport and disposal). Any omissi<strong>on</strong>s during the predisposal stage<br />
shall have to be made up by additi<strong>on</strong>al treatment, which will certainly increase the costs.<br />
Development of waste acceptance criteria for disposal in Slovenia has been carried out under the following main c<strong>on</strong>diti<strong>on</strong>s:<br />
(1) Site selecti<strong>on</strong> process is under way (a shortlisted site is Vrbina, Krško); (2) Basic design of repository is proposed (underground<br />
silos); (3) Total volume of short-lived waste in Slovenia expected by 2037 is assessed to be 17,200 m3 (assessment includes operati<strong>on</strong>al<br />
and decommissi<strong>on</strong>ing waste from Krško NPP, decommissi<strong>on</strong>ing waste from TRIGA, and radwaste from medicine, research<br />
and industry); (5) Characterizati<strong>on</strong> of the operati<strong>on</strong>al waste that is storing at Krško NPP site and acceptance criteria for this storage<br />
has been performed; and (6) Characterizati<strong>on</strong> of the radioactive waste from other sources that is storing at Brinje site, as well<br />
as corresp<strong>on</strong>ding acceptance criteria has been established.<br />
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