Present status of the High Temperature Engineering Test Reactor (HTTR)

Non-destructive evaluation methods for degradation of IG-110 and IG-430 graphite

“…The evaluation of this damage on the graphite components is one of the key technologies for their lifetime extension [2][3][4]. The Japanese VHTR system GTHTR-300C [5] adopts a block type core design similar to the high temperature engineering test reactor (HTTR), which is the first HTGR in Japan with the maximum thermal power of 30 MW [6]. The fine-grained isotropic IG-110 graphite (Toyo Tanso Co.) is used in the HTTR core, and the IG-110 (IG-11) and IG-430 (Toyo Tanso Co.) are candidates for the VHTR graphite components.…”

Role of nuclear energy to a future society of shortage of energy resources and global warming

“…The JAERI developed the HTTR [12], a 30 MWt HTGR test reactor, and succeeded in getting helium gas of 950°C at reactor outlet of the HTTR in 2004 for the first time in the world. Several key technologies are described below.…”

Application of nuclear energy for environmentally friendly hydrogen generation

“…3 shows the cutaway view of the HTTR reactor. The HTTR, the first HTGR in Japan, can supply a high-temperature heat of 950 • C at the reactor outlet with the thermal power of 30 MW, using helium gas as coolant and graphite as materials of core and reactor internals such as fuel elements, replaceable and permanent reflector blocks and core support structures [1]. The reactor consists of a reactor pressure vessel, fuel elements, replaceable and permanent reflector blocks, core support structures, control rods, etc.…”