Safety case methodology for nuclear waste disposal - possible update considerations for Finnish usage

Research output: Book/ReportReport


The report gives an introduction to the geological disposal of nuclear waste. In
the licensing of nuclear waste disposal facilities, safety case is a widely used tool
for the safety demonstration. Safety case methodology is described briefly
touching e.g. its function and content. Three safety case references are
discussed briefly, namely IAEA, OECD NEA and Posiva versions. Safety
assessment methodology for nuclear power plants have been improved along
lessons learned from nuclear accidents, e.g. at Fukushima. Current discussion in
Finland is based on defence-in-depth philosophy, top-down approach, and
views about system of systems. A Fukushima-inspired topic is institutional
strength-in-depth. The aim of this report is to discuss whether these topics need
to be transferred to nuclear waste management as well. Analysing safety case
methodology vis-à-vis the four previous topics indicates that in principle all of
them are already covered in safety case. However, the desired extent and depth
of organisational analysis may require wider discussion in nuclear waste
community. In current safety cases organisational questions are mostly
discussed in scenarios and in the description of licence applicant's management
Original languageEnglish
PublisherVTT Technical Research Centre of Finland
Number of pages41
ISBN (Electronic)978-951-38-8719-3
Publication statusPublished - 2019
MoE publication typeD4 Published development or research report or study

Publication series

SeriesVTT Technology


  • nuclear waste management
  • final disposal
  • long-term safety
  • Safety case
  • overall safety
  • Defence-in-depth
  • organisational aspects

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