2.13 Sellafield Limited has put back considerably most of the nine remaining major projects since they were initiated, putting back the completion dates further since September 2013. In aggregate, Sellafield Limited has put back the estimated completion dates for the three projects still in planning and design by 143 months since they were initiated. Eighty six months of this change in estimated duration has occurred since September 2013. The vast majority of the changes relate to two complex retrieval and treatment plants: pile fuel cladding silo and silos direct encapsulation plant.
2.14 Sellafield Limited has put back the estimated completion dates for the six projects now in the construction phase in aggregate by 271 months since they passed their design gate (the date the project design is approved to begin construction). 100 months of this change has occurred since September 2013. Since September 2013 the increase in duration is largely attributable to the magnox swarf storage silos retrieval project and the box transfer facility, both of which have been deferred to align with the revised silos direct encapsulation plant availability.
2.15 The estimated completion dates for two further projects - the box encapsulation plant product store direct import facility, which is in planning and design, and the silos maintenance facility, which is in construction - were extended by 12 months between September 2013 and December 2014. This was due to under-estimation of the scale of the challenge and the need to align the projects with the magnox swarf storage silo programme.