Investigation of Plutonium and Uranium Precipitation Behavior with Gadolinium as a Neutron Poison

Visser, A.E.

Savannah River Site (S.C.)

关键词: Criticality;    Radiation Protection;    Hydroxides;    Neutrons;    Process Solutions;   

DOI  :  10.2172/812302
RP-ID  :  WSRC-TR-2003-00193
RP-ID  :  AC09-96SR18500
RP-ID  :  812302

美国|英语

来源: UNT Digital Library

【 摘 要 】

The neutralization of solutions containing significant quantities of fissile material at the Department of Energy's Savannah River Site and the subsequent transfer of the slurry to the High Level Waste (HLW) system is accomplished with the addition of a neutron poison to ensure nuclear safety. Gd, depleted U, Fe, and Mn have been used as poisons in the caustic precipitation of process solutions prior to discarding to HLW. However, the use of Gd is preferred since only small amounts of Gd are necessary for effective criticality control, smaller volumes of metal hydroxides are produced, and the volume of HLW glass resulting from this process is minimized.