Separation and purification of Sr-90 from PUREX HLLW using N,N,N ',N '-tetra(2-ethylhexyl) diglycolamide | Health & Environmental Research Online (HERO)

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Citation
Tags

HERO ID

2043301

Reference Type

Journal Article

Title

Separation and purification of Sr-90 from PUREX HLLW using N,N,N ',N '-tetra(2-ethylhexyl) diglycolamide

Author(s)

Dhami, PS; Janardanan, C; Jagasia, P; Pahan, S; Tripathi, SC; Gandhi, PM; Wattal, PK

Year

2013

Is Peer Reviewed?

Yes

Journal

Journal of Radioanalytical and Nuclear Chemistry
ISSN: 0236-5731
EISSN: 1588-2780

Volume

296

Issue

Page Numbers

1341-1347

DOI

10.1007/s10967-012-2302-0

Web of Science Id

WOS:000320283700021

URL

http://link.springer.com/10.1007/s10967-012-2302-0
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Abstract

This paper describes a method for the separation and purification of Sr-90 from PUREX-HLLW employing solvent extraction and precipitation techniques. 30 % TBP in n-dodecane was used for the removal of residual uranium, plutonium and neptunium from HLLW. Trivalent actinides and lanthanides were subsequently removed using N,N,N',N'-tetra(2-ethylhexyl) diglycolamide (TEHDGA, 0.20 M in 30 % isodecyl alcohol and n-dodecane). 90 Sr was selectively extracted from actinides and lanthanides depleted HLLW using 0.3 M TEHDGA in 5 % isodecyl alcohol and dodecane. Loaded strontium was stripped using 0.01 M HNO3 and further purified by radiochemical precipitation technique after adding Fe and natural strontium as carriers. Based on the experimental results, a flow-sheet was formulated and mCi levels of Sr-90 recovered.

Keywords

Solvent extraction; Precipitation; TBP; TEHDGA; High level liquid waste; Sr-90; Sr-90-Y-90 generator