Engineered solutions including temporary works design for a complex nuclear deconstruction project at Sellafield Nuclear Site.

Colemans were approached for this project because of our experience within engineered deconstruction, concrete cutting and specialist lifting.

Our dedicated project engineers offer specialist advice and safe methodologies for a wide range of projects, including temporary works. At Sellafield, they proposed the engineered solutions required to overcome complex site challenges.

The client required the deconstruction of a large heavily reinforced concrete structure from the top of a 125m chimney located centrally within the Sellafield Nuclear site.

The work area at the top of the chimney was deemed to be contaminated and as such our methodology and sequence had to consider that.

The team were tasked with developing methodologies, sequencing and material handling strategies that align with Sellafield’s stringent policies and procedures.

Over a period of 12 months, Colemans developed extensive documents, animations and sequences that detailed every stage of the complex deconstruction process. Working closely with Cavendish Nuclear and Sellafield, we were able to prepare documents and substantiation for the rigorous pre commencement review and justification process.

Our work at pre planning stage from Colemans’ engineering specialists was instrumental in facilitating the safe delivery of the project.

To support our documented work, Colemans set up and facilitated a full-scale demonstration of cutting, drilling and slurry containment. This mock up allowed cutting times, set up times, slurry viscosity and water usage to be meticulously recorded and reported on.

As part of the review and development process, Colemans also actively participated in recognised Sellafield practices including:

• Note for Record Reviews
• Assurance Reviews
• Mechanical Assistance reviews
• Constructability Reviews
• HAZCON Reviews