Evaporator D project

Reducing the volume of legacy waste

Evaporator D will provide replacement capacity for the Sellafield’s existing evaporators; these play a pivotal role in safely cleaning up the site by reducing its nuclear inventories.

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Sellafield Limited

on behalf of Nuclear Decommissioning Agency

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Interserve
Mammoet
Shepley Engineers
Bendalls Engineering
Harry Peers Steelwork

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UK's largest nuclear decommissioning project
11 in-cell modules
Over 21km pipework
Over 100,000 welds
3,000 tonnes of specialist steel

From beach to site

The modules were transported across the River Ehen on a temporary bridge, then over the Barrow to Carlisle rail lines before being installed in the evaporator building using a purpose-built gantry system.

Community engagement

We hosted a bridge building event at Lakes College where 240 children were given a fun introduction into the challenges of civil engineering at no cost to their schools.

A key challenge for the project was the location of the evaporator building – next to an operational facility and on a restricted footprint. This made it difficult to build this complex plant in situ.

To address this challenge, we developed a strategy to construct the plant in 15 modules, which were pre-fabricated and tested off-site. Because many of the modules were too big to transport on Cumbria’s road network, we worked with Sellafield to devise a plan to get the modules to the site by sea.

This phase of the project presented us with a unique logistical challenge, and all the parties involved are proud of the fact that we have successfully and safely delivered this module to a site of this size and complexity.

Duncan Basnett, Construction Engineer, Sellafield Ltd, on the successful delivery and installation of the largest module.

Evaporator D will be used to concentrate highly-active raffinate produced during reprocessing and to process effluent from the Waste Vitrification Plant (WVP) at Sellafield. Once concentrated through evaporation, the resulting product is called highly-active liquor (HAL). This is stored prior to vitrification, which immobilises the waste in glass for long-term storage and eventual disposal.

This first ever delivery of a major component to the beach is the culmination of lots of hard work by a great team of people. We are all very proud of our accomplishment.

Tom McClain, Sellafield Ltd Project Manager, speaking following the delivery of the first module.

Contact and social

Nuclear

Rob Phillips, Sector director
0161 910 3444
rob.phillips@costain.com