This paper describes the plan developed by Duke COGEMA Stone & Webster (DCS) to dispose of 33 tonnes of excess weapons grade plutonium by using mixed oxide (MOX) fuel in McGuire 1 and 2 and Catawba 1 and 2, operated by Duke Power; and Virginia Power's North Anna I and 2. A discussion of the assumptions and constraints imposed by DOE and the utilities is presented along with the fuel assembly neutronic design, the software used for core design, and the resulting in-core fuel management schemes which would accomplish the mission objective.