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“Getting this important project off the ground is good news, as the PFCS represents one of the most challenging decommissioning projects and we’re commited to reducing high hazards at Sellafeld.”

Dr Ian Hudson, the NDA’s Head of Programme for Sellafield said: “Risk and high hazard reduction is our main priority at Sellafield. Getting to a position to start radioactive waste retrievals from our legacy facilites such as the Pile Fuel Cladding Silo is crucial to the long term success of our decommissioning mission on the site. Successful delivery of the work covered by these contracts will be an important step in achieving that objectve.”

Site preparations completed

Site preparations have previously been completed for the new PFCS Retrieval Facility superstructure; 130 piles have been sunk into the ground and the concrete foundatons are in place. The Retrieval Facility will comprise a reinforced concrete superstructure to be built by Sir Robert McAlpine, with modular steel retrieval and packaging cells.

The whole facility will be bolted onto the side of the PFCS, but will be structurally independent.

The engineering procurement and constructon of the key modules will provide the heart of the PFCS Retrieval Facility. It will include primary equipment for the retrieval of the wastes from the six compartments and its subsequent packaging into 3 m³ waste boxes. The completed modules will be sloted into the skeleton superstructure in order to commence retrieval of the silo waste in 2017 in line with the performance plan.

Bechtel Babcock Nuclear Services (BBNS) has already started work familiarising themselves on the project as a precursor to completng the manufacturing design of the modules.

The Clarke Chapman Group contract is to design, build and works test a Semi Goliath Crane to handle the waste packages coming in and out of the modules. The 3 m³ waste packages will weigh in the region of 60 tonnes when full and will be transferred to a new purpose built storage facility currently in the design and constructon phase.

Nuclear wastes datng back to the 1950s and 1960s are stored in the PFCS. The store is almost 60 years old and is one of the priority decommissioning projects on the Sellafield site. In the last 10 years a significant amount of work has been completed in order to prepare for retrieving this historic waste from the PFCS, which will allow the eventual decommissioning and demoliton of the store.

New crane supports clean up project

A new self erectng tower crane has been built at Sellafeld as part of the work to retrieve historical waste from a 60 year old silo. The Pile Fuel Cladding Silo (PFCS) is a priority decommissioning project which contains nuclear waste that needs to be retrieved, processed and packaged. The Of f i ce for Nuc l ear Regul at ion (ONR) has issued a License Instrument to start construction of the waste retrievals superstructure. The plan is to build a waste retrieval plant adjacent to the side of the existing structure. The piled foundations were completed in 2009, and the next stage is to build the superstructure and control room for the retrievals operaton.

The crane is a Potain HDT80 with a weight of 63 tonnes including 37 tonnes of

Page 12 Contractors World - UK & Ireland Vol 1 No 5

Crane lifs modules into positon within the Evaporator D building.

Poclain self erectng crane on hire from Mants Cranes being used by Sir Robert McAlpine

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