Borated HDPE is often used to shield duct penetrations in radiation therapy vaults. Typically 1 or 2 inches of 5% borated polyethylene is required in addition to some sheets lead. This borated polyethylene and lead shielding will be used inside the room most often. In some cases the shielding will be required inside and outside the room. Borated polyethylene is easily cut into the sizes necessary to work for the duct shielding.
Neutron Shielding – 30% Borated Polyethylene
Contains 30% boron and relatively high hydrogen content
Effective neutron shielding for criticality control applications
Available in slabs, bricks, cylinders, and other custom shapes
Control of criticality is of the utmost importance during all phases of power reactor fuel handling, including reprocessing. In order to assure neutron isolation during these stages, shielding materials containing very high concentrations of boron are frequently used.