Advanced Reactor Concepts and Fuel Cycle Technologies

Abstract

Nuclear power is an abundant source with zero CO 2 output, and expanded fission power is an attractive option especially in growing countries. Various reactor concepts are being studied to comply with requirements of future nuclear fuel cycle such as safety, sustainability, cost-effectiveness, and proliferation risk reduction. These generation IV reactor concepts include both thermal and fast reactors and are being developed in conjunction with advanced reprocessing technology. In addition, beyond-generation IV type reactors are being developed, which mitigate the concern on the nuclear waste issue by adopting very high-burnup fuel and long-life core. Consideringmovement towards future nuclear cycle, we have collected papers which cover the topical areas of new activities in advanced reactors and fuel cycle technologies and published these in this special issue on advanced reactor concepts and fuel cycle technologies. This special issue contains 10 research articles, including seven papers on advanced reactor concepts. The advanced reactor concept covers sodium-cooled fast reactor (SFR), gascooled fast reactor (GFR), supercritical water reactor (SCWR), and pressurized water reactor (PWR).The research topics include an advanced Korean SFR system design and analysis, improvement of Japanese SFR core performance by moderators in the blanket region, use of moderating materials to compensate the drawback ofminor actinide containing transmutation fuel in European fast reactors, a multiphysics modeling technique for in situ breeding and burning reactors, an ultralong fuel cycle compact GFR system design and analysis, a simulation strategy for the evaluation of neutronic properties of a Canadian SCWR fuel channel, and a thorium-plutonium fuel cycle for operating cycle extension of a PWR. The special issue also includes research results on the modeling forced-flow chemical vapor infiltration for fabrication of SiC-SiC composite materials, development of inactive demonstration facility for a proliferation-resistant pyroprocessing technology, and the economic analysis of a closed fuel cycle.