Link to the study - European Parliament - Europa

Nuclear Decommissioning: Management of Costs and Risks
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The formal approval processes (general license, approval for sub-projects, etc.) require additional
time and resources and are associated with additional risks (time delays, forced plan changes, etc.) to
the project. Project planning has to consider the necessary time and resources for those activities. To
minimize those risks the applied regulatory approach shall be to seek consent already in early
planning phases.
Practice
Necessary times to apply for and to achieve regulatory consent are included in the workflow model of
the PMIS tool and are regularly updated.
EWN seeks regulatory consent already in the conceptual stage of work package design and planning.
This assures that the supervisory agency is able to voice its concerns already in an early phase and
that the later approval of the agency to final plans and work packages requires no extensive times.
3.4.6. Cost estimates
All cost estimates in the EWN decommissioning project were performed by use of the project
management tool described in chapter 3.4.3. From the experiences in this case the tool provides
reliable estimates. By application of correction factors experiences made during the first phase
estimates were integrated and reliability increased.
Figure 27 shows the overall cost development for the five Greifswald reactors.
Figure 27: Costs of decommissioning the five Greifswald reactors
Source: (EWN 2012a)
As can be seen the cost contributions from the single sub-projects are very different. It further shows
that the needs are very different over time. The initial phase, where large investments have to be
made for equipment, waste management treatment and storage facilities, is the most cost-intensive.
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