scholarly journals Development of a chemical process using nitric acid-cerium(IV) for decontamination of high-level waste canisters

1988 ◽  
Author(s):  
L.A. Bray
Keyword(s):  
Nitric Acid ◽  
Chemical Process ◽  
High Level Waste ◽  
High Level

Technetium Removal Processes for Soluble Defense High-Level Waste

1984 ◽  
Vol 44 ◽  
Author(s):  
Darrel D. Walker ◽  
Jane P. Bibler ◽  
Richard M. Wallace ◽  
Martha A. Ebra ◽  
John P. Ryan
Keyword(s):  
Nitric Acid ◽  
Exchange Resin ◽  
Ion Exchange Resin ◽  
High Level Waste ◽  
Weak Base ◽  
Strong Base ◽  
Sintered Metal ◽  
Base Resin ◽  
Removal Processes ◽  
High Level

AbstractTwo methods for removing technetium from soluble defense high-level waste are described. In the first method, technetium is precipitated as tetraphenylphosphonium pertechnetate and separated from the decontaminated solution using sintered metal crossflow filters. In the second method, pertechnetate is removed from solution using a strong base anion exchange resin and then eluted from the resin with nitric acid. The nitric acid is recovered by sorption of the pertechnetate on a weak base ion exchange resin. The pertechnetate is eluted from the weak base resin with NaOH and recovered by precipitation as the sulfide or oxide.

Alternatives to Nitric Acid Stripping in the Caustic‐Side Solvent Extraction (CSSX) Process for Cesium Removal from Alkaline High‐Level Waste

2009 ◽  
Vol 27 (2) ◽  
pp. 172-198 ◽  
Author(s):  
Lætitia H. Delmau ◽  
Tamara J. Haverlock ◽  
Eve Bazelaire ◽  
Peter V. Bonnesen ◽  
Mary E. Ditto ◽  
...  
Keyword(s):  
Nitric Acid ◽  
Solvent Extraction ◽  
High Level Waste ◽  
Cesium Removal ◽  
High Level

N,N,N′,N′-tetraoctyl-3-oxapentane-1,5-diamide impregnated magnetic particles for the uptake of lanthanides and actinides from nuclear waste streams

2007 ◽  
Vol 95 (3) ◽  
Author(s):  
B. S. Shaibu ◽  
M. L. P. Reddy ◽  
M. S. Murali ◽  
V. K. Manchanda
Keyword(s):  
Nitric Acid ◽  
Magnetic Particles ◽  
Simple Technique ◽  
Chemical Separation ◽  
High Level Waste ◽  
Acid Solutions ◽  
Waste Streams ◽  
Nitric Acid Solutions ◽  
Heavy Water Reactor ◽  
High Level

A novel, simple technique based on magnetically assisted chemical separation (MACS) has been developed for the uptake of lanthanides and actinides from pure nitric acid solutions as well as from Simulated Pressurized Heavy Water Reactor-High Level Waste (PHWR-SHLW). Uptake profiles of various metal ions, such as Pu(IV), U(VI), Th(IV), Am(III), Eu(III), Sr(II), Cs(I) and Fe(III) were investigated as a function of time and nitric acid concentrations using

Nitric Acid Cleaning Of A Sodalite–sodium Diuranate Scale In High Level-waste Evaporators

2003 ◽  
Vol 38 (12-13) ◽  
pp. 3249-3271 ◽  
Author(s):  
W. R. Wilmarth ◽  
M. C. Thompson ◽  
C. J. Martino ◽  
V. H. Dukes ◽  
J. T. Mills ◽  
...  
Keyword(s):  
Nitric Acid ◽  
High Level Waste ◽  
Acid Cleaning ◽  
High Level
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