Fission Uranium Fission Uranium Corps [FCU-TSX; FCUUF-OTCQX; 2FU-FSE] high grade Triple R deposit at its Patterson Lake South property and the J-Zone deposit, which is now a key part of Denison Mines Corp.s [DML-TSX] Waterbury project. Currently advancing towards feasibility, Triple R is the Athabasca regions highest-grade deposit at shallow depth and is expected to become one of the worlds lowest cost uranium mines.