VENTILATION AND TRAFFIC STUDY FOR A PROPOSED DEEP GEOLOGICAL REPOSITORY IN CRYSTALLINE GEOSPHERE
3rd Canadian Nuclear Waste Management Decommissioning and Environmental Restoration - 2016 Sept. 11-14


Presented at:
3rd Canadian Nuclear Waste Management Decommissioning and Environmental Restoration
2016 Sept. 11-14
Location:
Ottawa, Canada
Session Title:
Session W2: APM Repository Design & Safety Case

Authors:
A.C. Lee (Nuclear Waste Management Organization)
C. Imrie (HATCH)
D. Witow (HATCH)
A.S. Zivkovic (Nuclear Waste Management Organization)
  

Abstract

The management of nuclear waste products in Canada is undertaken by the Nuclear Waste Management Organization (NWMO). The Adaptive Phase Management (APM) methods are used by NWMO to develop the design of a new Deep Geological Repository (DGR) for the safe storage of used nuclear fuel. This facility design will adapt to the structural anisotropy of the rock mass as expected in a hypothetical crystalline geosphere through a layout that will incorporate significant flexibility in addressing geoscientific, safety and engineering aspects as details become available during progressive study stages and construction.

This paper presents the conceptual design requirements, preliminary engineering analyses, and results associated with: layout features, ventilation strategy, and traffic flow management for DGR construction activities and used nuclear fuel placement. The overall layout configuration considers the functionality of: the underground central services area (CSA), the establishment of flow-through ventilation, and, completion of the demonstration rooms during initial construction. This will set the stage for lateral development during subsequent construction that will involve the completion of the first panel of the placement rooms prior to operations. Aspects of worker safety and preliminary thoughts on emergency responsiveness to events during both construction and operations are included.

The results of this study conclude that: there is significant flexibility of the layout to adapt to the geosphere as it becomes progressively defined; the ventilation system and traffic flow can be configured for different scenarios through the DGR operations; and, potential worker exposure for defined emergency events is minimized.

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