[en] In 1984 the authors performed blanket optimization studies for the Cascade reactor concept. The authors investigated a Cascade chamber that uses a LiAlO₂ breeding blanket and a beryllium oxide (BeO) neutron multiplier. The Cascade chamber can be designed with a LiAlO₂ breeding blanket if a BeO neutron multiplier is used. The configuration that minimized the total blanket thickness is 0.042 m of BeO followed by 0.424 m of LiAlO₂. The lithium must be enriched to at least 34.2% in ⁶Li. Because the blanket is a granular bed, the actual thickness is equal to the effective thickness divided by the granule packing fraction. If they assume a 50% packing fraction, the result is a total blanket thickness of 0.93 m