抄録
JAERI has undertaken the design study of gas turbine high temperature reactor, the GTHTR300. Design of fundamental safety functions, such as shutdown of rector, maintaining the coolability of reactor core and prevention of FP release has progressed in this design study program. Design of control rod arrangement and its insertion scheme was conducted in order to meet the safety requirement, such as a sufficient shutdown margin of reactivity and a low control rod ejection worth. A passive cooling system by using a natural convection of air was designed for maintaining the coolability during accident. Cooling panels consisting of rectangular ducts were adopted for sufficient capability of heat removal and structural integrity during depressurization accident. Double confinement was designed for mitigation of FP release and for maintaining the integrity of coated fuel particles and graphite material of fuel support structures. This article describes results of these design studies.
