The project being carried out by Vinci Construction was stopped in its tracks after the foundations and base slab were completed while a thorough review of waster treatment was carried out.
But now Sellafield has been given permission to restart the job and is preparing to start detailed discussions with main contractors about delivering a full design, build and commission contract.
The BTF is an important plant to enable the decommissioning of the Magnox Swarf Storage Silos, which is one of the priority projects on the Sellafield Site. The MSSS dates back to the 1960s and contains intermediate level waste mainly comprising Magnox fuel cladding.
Firms under the restricted tendering procedure have been given until the end of January to formally prequalify as bidders.