IAEA International Atomic Energy Agency Roger Seitz Potential Working Groups

IAEA Potential Working Groups from March Topical areas for a future WG WG1: Technical Conditions – to address specifics on possible human actions based on site conditions (e.g. type of drilling, well diameter and depth, etc.) Technology available locally or more generally available (developing countries) Role of geology/hydrology in defining scenarios Description of details regarding intrusion (well diameter, location of well, etc.) Conditions that could limit potential for intrusion 2

IAEA Potential Working Groups from March WG2: Societal Aspects – to address societal context of future human action scenarios Level of development (current or future) Recognition something is wrong Distinction between inadvertent and advertent Effectiveness of barriers, markers and records (passive) International archive? Taking credit for records 3

IAEA Potential Working Groups from March WG3: Linking Technical and Societal Conditions with Design – to consider the synthesis of site and societal considerations with the actual repository design to develop the full scenarios to be considered Timing – effectiveness of barriers as a function of time Links between natural processes and intrusion (erosion of cover) Countermeasures – what types of barriers are effective against drilling or excavation (develop table of barriers and different types of intrusion How does design impact contact with any specific waste package (spatial) 4

IAEA General Topics – Practical implementation Consider how scenarios regarding future human actions are used in the process of siting, designing and developing WAC Regulatory and public perception considerations Interpretation of results above 1 mSv, do we always calculate impacts? Inclusion of probabilities/likelihoods Public perception of intrusion – over cautious, conservatisms Regulatory considerations – developing regulations Common methodology Natural evolution or intrusion (erosion followed by moving on site) Do we develop scenarios or consider impacts of intrusion without specifying scenarios How are results used to influence design, siting and WAC (applications throughout lifecycle) 5

IAEA Additional Ideas Divide by geologic and near-surface disposal Update draft IAEA document into Safety Report (integrating activity) Considerations: Limit number of groups Focus on areas where consensus can be reached Practical expectations, achievable goals Want to have product(s) that will contribute to a safety report at the end of the project 6