Waste Technology Section

Underground Research Facilities Network (URF)


Practical Aspects of Repository Engineering for Disposal of Spent Fuel/HLW in Sedimentary Environments

8—15 November 2011, Peine, Germany


day 1

Welcome and introductions

Topical Session I: Repository Design, site selection and safety concepts
Repository design and operational considerations in clays and salt (DBETEC)

Selecting a repository site and site characterisation in clay (ITC)

Selecting a repository site and site characterisation in salt (DBETEC)

Repository design and long-term safety concept for clays (ITC)

Repository design and long-term safety concept for salt (DBETEC)


day 2

Safety assessment example: Konrad repository (BfS)

Safety assessment example: Gorleben repository (DBETEC)

Topical Session II: Monitoring
Design and operational requirements of repository systems and waste handling equipment (DBETEC)

Monitoring before, during and after disposal I and II (NAGRA)

Monitoring of HLW Repositories – Objectives, needs and technologies (DBETEC)

Topical Session III: Operational procedures (engineering and construction)
Design and operational requirements of repository systems and waste handling equipment Coffee (DBETEC)

Visit to DBE underground handling and disposal equipment testing facility at Peine Coffee (DBETEC)

Constructing a repository (shaft sinking, ramp construction, drifts and cavern excavation etc.)(DBETEC)


day 3

Field Visit I: Gorleben
Introduction to the Gorleben site: history, geological and engineering characteristics (BfS)

Underground visit (BfS and DBETEC)

The German geological disposal programme – past and present (BfS)


day 4

Topical Session III: Operational procedures (engineering and construction)
Surface and underground infrastructure for repository development, debris extraction and debris disposal (DBETEC)

Surface and underground infrastructure for repository operation (waste conditioning for disposal, waste acceptance installations on site, buffer storage, radiological zoning and ventilation) (DBETEC)

Topical Session IV: Repository operation, closure and sealing
Systems and equipment for waste encapsulation and waste package production for disposal (Film showing equipment tests) (GNS and DBETEC)

Systems and equipment for waste hoisting to the underground disposal level and to the waste emplacement position in salt (Film showing equipment tests) (DBETEC)

Systems and equipment for waste ramp transport to underground and disposal in clay (Film showing the planned equipment) (ANDRA)

Repository backfilling and sealing (Film illustrating the closure of the Morsleben repository) (DBETEC)

Topical Session V: Operational safety and course exercise I
Design for operational safety in a deep geological repository (nuclear and conventional ventilation, emergency prevention and preparedness, fire prevention and fighting, escape routes, countermeasures) (DBETEC)

Implementation of operational safety requirements in the repository equipment and the waste acceptance criteria (requirements on packages, radionuclide limits) (DBETEC)

Break into groups to design an operational safety concept/programme for a hypothetical site


day 5

Field Visit II: Konrad
Field Visit to Konrad L/ILW repository site (under construction) – Presentation of history of repository programme, geology and underground site characterisation, tour of the underground facilities (BfS)

Topical Session V: Operational safety and course exercise I - Continuation
Presentation of results by each group to their peers and discussion


day 6

Topical Session VI: Retrievability and course exercise II
Retrievability considerations

Group exercise on retrievability

Presentation of results by each group and discussion

Wrap-up and closure of course (DBETEC and ITC)

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