Currently, the format, content and practice of cost estimation vary considerably both
within and between countries, which makes it very difficult to compare estimates,
even for similar types of facilities. The reasons are largely due to different legal
requirements in different countries and to historical custom and practice, leading
to variations in basic assumptions such as the anticipated decommissioning strategy
and end state of the site, and to different approaches to dealing with uncertainties.
While attaining harmonisation across national approaches to cost estimation may be
difficult to achieve, standardising the way decommissioning cost estimates are structured
and reported will give greater transparency to the decommissioning process and will
help build regulator and stakeholder confidence in the cost estimates and schedules.This
booklet highlights the findings of the NEA Decommissioning Cost Estimation Group (DCEG)
which recently studied cost estimation practices in 12 countries.