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NIA UK | Sellafield decommissioning reaches new heights

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The demolition of one of Sellafield’s tallest hazards has started.

A chimney on top of the oldest reprocessing plant on the nuclear site, will be crunched away at a rate of 1 metre a week.

The tower will be gone by 2020, resulting in a permanent change to the Sellafield skyline.

The stack sits on top of the First Generation Reprocessing Plant and provided ventilation to a fleet of reprocessing plants.

The 60 year old structure no longer meets modern construction standards, therefore must be removed as a priority.

At 61 metres tall, on top of a 61 metre building, it was the tallest structure on the site, until a modern replacement was built.

It’s position on one of the most congested nuclear sites in the world has made this a complicated and lengthy process.

Conventional demolition techniques like explosives and cranes can not be used in such a crowded, hazardous environment.

Stuart Latham is head of remediation at Sellafield Ltd, he said:

“Cleaning up our legacy facilities safely, quickly and cost-effectively is our absolute priority, so we are delighted to now see the stack coming down after four years of preparation.”

“Given the structural integrity of the stack, its location in the heart of the site and the fact that this new technique has never been used here before, the planning has been comprehensive. The project demonstrates the challenges of decommissioning the Sellafield site.

“We couldn’t move a crumb of this chimney without building a modern replacement first, so this has been a complicated project, made easier by working closely with our supply chain.

“Safety is the number one priority, so thorough testing has helped us ensure everything works as it should.”

Sellafied Ltd has worked with principal contractors, Nuvia Ltd and steeplejacks, Delta International; who have brought specialist demolition expertise and innovative ideas to the project.

This work saw Nuvia win the Technology Innovation Implementation award at the 2017 NDA Estate Supply Chain Awards.

Source: NIA UK | Sellafield decommissioning reaches new heights