Actually I think the hint was that 15% to 30% will go for nuclear.

from the March 9th PR. The last line is the hint.

Based on research and dialogue with end-users, at this point in time, Zenyatta expects to have a targeted market application segmentation which includes 20-25% for high purity graphite in Fuel Cell products, 25-30% in Lithium-ion batteries and 25-30% in powder metallurgy. Powder metallurgy and the remaining 15-30% target applications will be discussed in upcoming news releases.