GAMMA-RAY AND FAST NEUTRON ANNULAR STREAMING EVALUATION THROUGH SODIUM REACTOR EXPERIMENT (SRE) MARK II CONTROL AND SAFETY ROD ASSEMBLIES

摘要

An experimental program was initiated to determine the extent of fast neutron and gamma-ray streaming through the SRE Mark II control and safety rods and to evaluate the adequacy of the shielding provided in these control and safety rods. The methods and procedures used to evaluate these problems are routine and proven for determining gamma-ray and fast neutron dosages using radiation sensitive films and gold foils. The final experimental results indicated that no excessive streaming of either gamma-rays or fast neutrons is present above or around the SRE Mark II control and safety rods.