Dose measurement and analysis of EAST tokamak in 2006 Autumn engineering commissioning

The radiation generated by EAST tokamak in 2006 autumn engineering commissioning included photons generated by bremsstrahlung and a small amount of neutrons induced by photon. For appraising the personal doses of the operators and the environmental radiation exposure, LiF (Mg, Cu, P) thermoluminescence detectors (TLDs) were used to measure the dosage caused by photons in relevant areas, including the EAST tokamak hall, the working area (central control room) and the surrounding environment. The measurement results showed that the dose in the tokamak hall was high and the radiation might cause hazard to the health of the people during the discharge period, so any one who entries into or stays in the tokamak hall must be prohibited automatically by the safety interlock system. The measuring results also indicated that the exposures in the central control room and the environment were almost the same as the background radiation, the possible hazards of radiation to the staff and the surrounding inhabitants were very small. (author)