Risk Communication Study, Practice, and Future Direction of Tokai Works

Takashita, Hirofumi ; Yonezawa, Rika; Shobu, Nobuhiro 

Temperature fluctuation due to mixing of the fluids with different temperature in T-junction pipe gives thermal fatigue to structure, and this phenomenon is significant as safety issue in liquid metal cooled fast reactor (LMFBR). In Japan Nuclear cycle Development Institute (JNC), experimental and numerical investigations have been performed to reveal the mixing phenomena in T-junction pipe and to establish the evaluation rule for design. Numerical simulation is conducted on the existing experiment to study secondary flow effect on the turbulence mixing in T-junction pipe.