Conceptual Design of a Small Nuclear Reactor for NTD-Si using Short PWR Fuel Assemblies

摘要

A small-sized nuclear reactor for large-diameterrnNTD-Si can be designed using a short PWR fuelrnassembly. The reactor can be critical over 1200 days. Thernexcess reactivity was suppressed by a combination ofrnburnable poison and control rod insertion. It wasrnconfirmed that heat removal from the core was possiblernunder 1 atm operating pressure. Large-diameter ingots 20rncm in height could be irradiated with sufficient uniformity.rnThe estimated production rate varied between 48rntons/year and 70 tons/year for 50 Ω.cm target resistivity.