2016年 · 第36卷第05期

Since the discovery of the atom for more than 100 years, the research results of nuclear energy and nuclear technology have been widely used in various fields of national economy, and have achieved huge economic and social benefits, which have promoted the progress of human civilization. In the mid-1950s, China created a nuclear industry. China has always been committed to the cause of peaceful use of nuclear energy, developing and promoting the widespread application of nuclear technology in industry, agriculture, medicine, environment, energy and other fields. In order to make better use of nuclear energy and achieve greater development, mankind must innovate nuclear technology, ensure nuclear safety and do a good job in nuclear emergency response. This is also a solemn commitment made to the world in the white paper "China's Nuclear Emergency" published by the Information Office of the State Council on January 27, 2016.

At 3 o'clock in the morning on May 7, 2014, a staff member of a flaw detection company lost one flaw detection piece during the flaw detection operation in the pipeline workshop of a company in Nanjing¹⁹²Ir source (activity approximately 9.6×10¹¹Bq, a Class II radioactive source). At 7:50 a.m., worker Wang picked it up and put it in his work clothes pocket. When standing, the source was located on the outside of his right thigh for about 3.25 h. On May 12th, Wang was sent to the Second Affiliated Hospital of Suzhou University for treatment. The biological dose estimation result was that the systemic equivalent dose was equivalent to an acute systemic uniform exposure of 1.51 Gy (95%CI1.40-1.61), the physical dose was estimated to be about 30-50 Gy local to the right thigh, and the maximum dose was about 4 100 Gy, and the diagnosis was mild myeloid acute radiation sickness by external irradiation and acute radiation skin lesion of degree IV. On May 25, 2015, Wang recovered and was discharged from hospital, and was hospitalized for 378 days.