Thermodynamic Modeling of the SRS Evaporators: Part III. Temperature, Evaporation, and Composition Effects on Process Control Strategy

Jantzen, C.M.

Savannah River Site (S.C.)

关键词: Evaporators;    Criticality;    Radioactive Waste Processing;    Sodium Uranates;    Process Control;   

DOI  :  10.2172/809742
RP-ID  :  WSRC-TR-2002-00318, Rev. 1
RP-ID  :  AC09-96SR18500
RP-ID  :  809742

美国|英语

来源: UNT Digital Library

【 摘 要 】

Accumulations of two solid phases (a nitrated aluminosilicate) and sodium diuranate, in the form of scale, caused the SRS 2H Evaporator pot to become completely inoperable in October 1999. The accumulation of the sodium diuranate phase, which selectively precipitated with the aluminosilicate phase, caused criticality concerns in the 2H Evaporator. In order to understand the role of steady state saturation on the scale formation, solutions processed from the SRS 2H, 2F, and 3H Evaporators were evaluated with a commercially available thermodynamic equilibrium code known as Geochemist's Workbench.