Recent neutronics studies of blankets for tokamak-based demonstration fusion neutron source (DEMO-FNS) showed a crucial influence of coolant composition on the transmutation rate of transuranic elements and tritium breeding in the system. The coolant choice varies with the neutron spectrum and shielding properties of the blanket. This paper presents a three-dimensional model developed... https://herbsdailyes.shop/product-category/pants-and-scrubs/