50 years of radiation shielding | LKAB Minerals
Radiation shielding hospital comparison

Some 50 years ago Sweden’s first oncological clinic was built using magnetite in the concrete for walls with radiation shielding properties.

By using Minelco MagnaDense (back then it was magnetite from LKAB) the walls of treatment rooms are thinner. Meanwhile they still offer solid and reliable radiation shielding.

First MagnaDense radiation shielding project

Lars Jonsson is an 84-year old radio physicist. He was involved in building Sweden’s first hospital with high density concrete magnetite filled walls. The building constructed was the University Hospital in Umeå. He says “the magnetite came from Kiruna, LKAB was able to provide what we wanted”.

Fifty years later, in 2010, the 2nd generation clinic for radiation treatment of cancer opened at Umeå. The constuction company used Minelco MagnaDense for the walls of this facility to protect against radiation.

Benefits of high density concrete in hospital radiation rooms

Lars explains why magnetite is so efficient in this application.  “We need buildings sealed extremely tightly for such a great amount of energy. This eliminates the risk of radiation leakage”.  Lars initiated the study to see how well magnetite performed in this application. Luckily the result of this study was very positive.

Thousands of cancer patients have passed through the solid walls of Umeå’s first oncological clinic. Lars said upon visiting Umeå “ the structure has held up well.  It’s completely intact.  The fact that the building was a model for others shows that we were on the right track from the beginning”.

MagnaDense is a natural mineral which our parent company LKAB mine and process in Sweden.