RD&D-Programme 2004 - SKB

Conclusions in RD&D 2001 and its review
In preparation for the design and engineering of the deep repository facility that began when the
site investigations were initiated, a need was identified to compile all existing design premises
in a single document. In RD&D 2001, the commenced work was presented by compiling and
structuring the design premises for the deep repository.
SKI points out in its review of RD&D 2001 that the performance requirements that have not yet
been determined must be complied with no later than when a permit application is submitted
under the Nuclear Activities Act. It is then necessary that the permit allows for some range of
variation and freedom of choice.
Newfound knowledge since RD&D 2001
SKB published general design premises for the deep repository in the KBS-3 system in 2002
/11-4/. The purpose of the document was to compile existing design-basis data in a single document
and in this way present the requirements for the long-term safety of the deep repository
on a general level. The idea was that the design management could use the document to check
that general requirements are followed up in design and engineering. Another purpose was that
regulatory authorities and stakeholders could use the document to follow up how their requirements
are translated into the actual configuration of the deep repository facility.
In the work of compiling the general design premises, it was observed that these premises
needed a far-reaching and thorough review and that this could be done when designers and
engineers began to make use of the general design premises in their work. It was also observed
that the information, due to the many connections and dependencies, was inaccessible and
difficult to update in report form, and that it should be transferred to database format.
Available software for requirement management has been inventoried, and a tool has been
purchased for testing and evaluation. Methodology and experience from systematic requirement
management has been obtained via cooperation with Posiva in the KBS-3H project /11-5/.
Review and checking of the contents of the requirements is carried out in parallel with the
development of the methodology for design of the underground part of the deep repository. The
purpose of the work is to check that general requirements are followed up in design, to identify
which requirements are to be verified within design and which are to be verified in other
contexts, to formulate the requirements so that they are unambiguous and easy to understand,
and to identify any conflicts of interest and deal with them.
Programme
The general design premises that were reported in 2002 /11-4/ will be updated and transferred
to database format. This work has been commenced, for example in conjunction with the
preparation of the document “Deep repository, Underground Design Premises (UDP)” /11-1/.
The work will result in an updated version of the general design premises and an evaluation of
mode of working and database tools. UDP is being applied in practice during the design of the
underground part in step D1. In the next step the design-basis material will be used for design
of the underground part in D2.
11.2.2 Control and verification
A well-defined decision process established in procedures and plans for review and approval
of different types of documents is needed for design.
Conclusions in RD&D 2001 and its review
Procedures for control and verification were not presented in RD&D 2001.
132 RD&D-Programme 2004