Feasibility of Uranium Concentration Measurements for H Canyon Tank 16.7

Lascola, R.J.

Savannah River Site (S.C.)

关键词: On-Line Measurement Systems;    Spectrophotometers;    Feasibility Studies;    38 Radiation Chemistry, Radiochemistry, And Nuclear Chemistry;    Quantitative Chemical Analysis;   

DOI  :  10.2172/807390
RP-ID  :  WSRC-TR-2002-00568
RP-ID  :  AC09-96SR18500
RP-ID  :  807390

美国|英语

来源: UNT Digital Library

【 摘 要 】

Savannah River Technology Center (SRTC) evaluated the feasibility of using the H Canyon on-line diode array spectrophotometer to measure uranium concentrations in Tank 16.7. On-line measurements will allow an increase in highly enriched uranium (HEU) production by removing delays associated with off-line measurements. The instrument must be able to measure uranium at concentrations below 1.0 g/L with an uncertainty no greater than 0.3 g/L. SRTC determined that the system has a limit of quantitation of 0.15 g/L. At concentrations of 0.5 and 1.0 g/L, the spectrometer uncertainty is 0.10 g/L. No design changes, such as an increase in flow cell path length, are required to obtain this performance. Expected levels of iron in Tank 16.7 solutions will not interfere with the measurement. The CHEMCHEK method should not be used for confirmatory analysis, as it contributes excessively to the overall uncertainty of the measurement. SRTC expects that the spectrophotometer will meet the measurement requirements for Tank 16.7.