RD&D-Programme 2004 - SKB

Newfound knowledge since RD&D 2001
During 2003, the design methodology for the underground part, as presented above, was used
in a pilot project that applied the site investigation data on which site model version 1.1 in
Forsmark is based /11-2/, to prepare the layout for the underground part. Application of the
methodology has led to proposals for changes and improvements in the site model with regard
to prioritized information, presentation of interpreted data and definition of verifiable criteria.
Furthermore, the methodology has been improved with respect to control, traceability against
general design premises, and use of early and general information.
Programme
The methodology for design of the underground part that has been used and refined in a pilot
project will be applied in the design work during the site investigation phase.
11.2 Premises
Design of the facility will be coordinated with site investigations, EIA, safety assessments
and system analyses, and with technical developments. A prerequisite for being able to carry
out design – and in a later phase construction, sealing and closure – with satisfactory results is
therefore to establish procedures for how:
• Design premises are to be fulfilled.
• Design – and later construction, operation, sealing and closure – are to be controlled.
• Results are to be controlled and checked.
• Results are to be documented.
11.2.1 Design premises
Design premises constitute a necessary basis for design and construction. Design premises can
be divided into requirements and engineered and natural conditions and features that control
design. The requirements express conditions that have been stipulated for construction and
approval of the deep repository. The engineered and natural conditions and features, which are
termed prerequisites, provide the other premises for design. Design premises will be formulated
for the different areas of the deep repository facility such as rock, buildings, vehicles, machines
and technical systems.
The requirements can be broken down into stakeholder requirements, system requirements
(subsystem requirements) and configuration requirements:
• Stakeholder requirements consist of the statements of different stakeholders regarding what
the facility should accomplish and what capacities it should have.
• System requirements express what the facility should do, or what functions, capacities,
properties or qualities it should have, to meet the stakeholder requirements.
• Configuration requirements express how the facility should be configured to meet the system
requirements, with respect to prevailing engineered and natural conditions and features.
The engineered and natural conditions and features that control the design of the underground
part of the deep repository facility are:
• The spent nuclear fuel – quantity and properties.
• The site – as it is described generically or in site descriptions.
• The facility – interfaces between different parts and technical systems as well as the
activities it will accommodate.
130 RD&D-Programme 2004