The document specifies requirements relating to criticality safety during the processing and handling of fissile material, in particular criticality data for plutonium dioxid light-water mixtures. The given numerical values and curves shall be used on a isolated system of plutonium dioxide (PuO2) homogeniously distributed in light water with the isotope combination 100% Pu 239 and 95% Pu 239/5% Pu 240 with maximum reflection by light water.#,,#