5 MW experimental low temperature nuclear heating reactor and its safety features

5 MW Experimental low temperature nuclear heating reactor developed by the Institute of Nuclear Energy Technology. Tsinghua University, has been put into operation. The main design characteristics, including the integrated arrangement, dual pressure-containing vessel structure, hydraulic control rod drive system used in reactor structures first time in the world, natural circulation and the design provisions for protecting heating grid from radioactive contamination are briefly described. These design measures greatly enhance the inherent safety features of the reactor, which are also presented in the paper