Strontium and Tru Separation Process in the DST System.

Johnson, M. E. ; Swanson, L. ; Boechler, G. N.

Technical Information Center Oak Ridge Tennessee

关键词: Strontium;    Transuranic isotopes;    Separation processes;    Precipitation;    Removal;   

RP-ID  :  DE2005841017

学科分类：工程和技术（综合）

美国|英语

来源: National Technical Reports Library

【 摘 要 】

The supernatants stored in tanks 241-AN-102 (AN-102) and 241-AN-107 (AN-107) contain soluble strontium-90 ((sup 90)Sr) and transuranic (TRU) elements that require removal prior to vitrification to comply with the Waste Treatment and Immobilization Plant (WTP) immobilized low-activity waste (ILAW) specification and with the 1997 agreement with the Nuclear Regulatory Commission on incidental waste. A precipitation process has been developed and tested with tank waste samples and simulants using strontium nitrate (Sr(NO(sub 3))(sub 2)) and sodium permanganate (NaMnO(sub 4)) to separate (sup 90)Sr and TRU from these wastes. This report evaluates removing Sr/TRU from AN-102 and AN-107 supernates in the DST system before delivery to the WTP. The in-tank precipitation is a direct alternative to the baseline WTP process, using the same chemical separations. Implementing the Sr/TRU separation in the DST system beginning in 2012 provides (approx)6 month schedule advantage to the overall mission, without impacting the mission end date or planned SST retrievals.