Radionuclide survey for Ji'nan miniature neutron source reactor decommissioning

Radionuclides in upper reactor container, pool materials. resin and waste were surveyed on the decommissioning site of Ji'nan Miniature Neutron Source Reactor, and the survey of pool materials was described in detail. The radionuclides in surveyed materials include ⁶⁰Co, ¹⁵²Eu, ¹³⁷Cs and ⁵⁴Mn with higher activity concentrations in materials at pool bottom just below the reactor container. The survey results indicate that upper reactor container, resin for reactor water purification, waste and a part of pool materials are low level waste. A certified reference material GBW08304a was used in this survey for quality control. The measured values agree well with the standard values within ±15%. (authors)