Mitsubishi Heavy Industries, Ltd. has been developing accident-tolerant fuel cladding tubes with improved performance under normal operation and in the event of an accident as part of its efforts to improve the safety of light water reactor plants and advancing core operation. In addition, aiming at implementation to actual plants in 2030s, data necessary for fuel rod design are being obtained by various performance verification tests and fuel rod irradiation tests in a research reactor in the United States.
