With the first BNCT(Boron Neutron Capture Device) treatment unit, Finland has become the world leader in cancer treatment.
High density concrete forms a shell structure around the BNCT treatment room, a dense bunker that protects the environment from neutron radiation released during the radiotherapy process.
Groundbreaking cancer treatment
Currently, BNCT treatment is used in the early stages of recurrent head and neck cancer. In the future, the same technique is likely to be used for many other cancers. The first boron neutron capture device in Europe will be used by hospitals in the Helsinki and Uusimaa Hospital District. A few similar BNCT treatment units are to be placed in Japan.
Strict mixing specification MagnaDense concrete
The American equipment supplier put strict specifications on the high density aggregate. They ordered that it had to be physically and chemically uniform. To make sure it met all the demands, they also analysed a high density concrete sample. After this tests, they were sure that the concrete meets the requirements of radiation wall protection for their equipment.
“I am very proud that we have been given the opportunity to work on this ground-breaking project in Finland. Our vast amount of experience in radiation shielding with MagnaDense aggregate has been a reassuring fact for our partners,” Pirjo van der Woude, Sales Manager LKAB Minerals Oy confirms.
Just-in-time MagnaDense supply
Company Rudus supplied the necessary heavy concrete to the construction site. This special concrete was cast into the partition walls of the treatment rooms at a thickness of 1.10 meters and a vault of 1.20 meters.
“Of course, different transportation methods were chosen based on both the contractor and the hospital. We needed to work very closely with the building site to schedule castings, as the ready-mix station could not be used to supply standard concrete mixes during the times we were mixing high density concrete, Antti Mönkkönen, Sales Manager at Rudus Ready Concrete, says.
But once the right concreting method was found, the concrete casting went even surprisingly effortlessly.
Heavy concrete was transported to the site from the Rudus Viikki concrete factory by three trucks, and due to the heavy concrete weight, the load was five cubic meters in one load. At that rate, one hundred cubic meters a day was cast.
Case study Finnish projects
Both this BNCT project and the construction of the Nova Hospital in Finland have been build using high density concrete with MagnaDense. We have gathered all project and technical details in a Case Study which is available for FREE upon request with your local technical sales manager. Please contact us for more information.