Sterilisation of blood products
The regional health centres involved blood transfusion are equipped with lead walled X-ray irradiators (on the left) that can be placed in a simple room and do not need additional protection from radiation. The irradiation delivers, in the blood pouches (on the right) a dose of around 20 to 25 Grays. Depending on the different models the irradiators are equipped with one, two or three sources of caesium 137, having an activity of around 60 Tbq.
Source ASN