Sodium zirconium phosphate (NZP) as a host structure for nuclear waste immobilization: A review

1994 ◽  
Vol 14 (6) ◽  
pp. 489-505 ◽  
Author(s):  
B.E. Scheetz ◽  
D.K. Agrawal ◽  
E. Breval ◽  
R. Roy
Keyword(s):  
Nuclear Waste ◽  
Zirconium Phosphate ◽  
Sodium Zirconium ◽  
Waste Immobilization ◽  
Host Structure ◽  
Nuclear Waste Immobilization ◽  
Sodium Zirconium Phosphate

Crystallographic evaluation of sodium zirconium phosphate as a host structure for immobilization of cesium

2010 ◽  
Vol 45 (2) ◽  
pp. 533-545 ◽  
Author(s):  
Rashmi Chourasia ◽  
Ashish Bohre ◽  
Ritu D. Ambastha ◽  
O. P. Shrivastava ◽  
P. K. Wattal
Keyword(s):  
Zirconium Phosphate ◽  
Sodium Zirconium ◽  
Host Structure ◽  
Sodium Zirconium Phosphate

scholarly journals Comparison of Sodium Zirconium Phosphate-Structured HLW Forms and Synroc for High-Level Nuclear Waste Immobilization

1996 ◽  
Vol 465 ◽  
Author(s):  
V. N. Zyryanov ◽  
E. R. Vance
Keyword(s):  
Zirconium Phosphate ◽  
Hot Isostatic Pressing ◽  
Sodium Zirconium ◽  
Dissolution Behaviour ◽  
Metal Bellows ◽  
Order Of Magnitude ◽  
Precipitation Phenomena ◽  
Nuclear Waste Immobilization ◽  
High Level ◽  
Sodium Zirconium Phosphate

ABSTRACTThe incorporation of (a) Cs and Sr as; (b) simulated actinides, and (c) simulated Purex waste in sodium zirconium phosphate (NZP) has been studied. The samples were prepared by sintering, by hot pressing and by hot isostatic pressing in metal bellows containers. The short-term chemical durability of the phosphate-based material containing Purex waste was within an order of magnitude ofthat for Synroc-C, as measured by 7-day MCC-1 tests at 90°C. The dissolution behaviour showed evidence of re-precipitation phenomena, even after times as short as 28 days. Potential for improvement of NZP-based ceramics for HLW management is discussed.

γ-Zirconium Phosphate as a Cs-Waste form for Partitioned Wastes

1982 ◽  
Vol 15 ◽  
Author(s):  
Sridhar Komarneni ◽  
Rustum Roy
Keyword(s):  
Heat Treatment ◽  
Nuclear Waste ◽  
Zirconium Phosphate ◽  
Layer Structure ◽  
Waste Form ◽  
Zirconyl Nitrate ◽  
Cesium Ion ◽  
Sodium Zirconium ◽  
Sodium Zirconium Phosphate

ABSTRACTγ-zirconium phosphate (γ-ZrP), γ-Zr(HPO4)2 2H2O is an extremely selective cesium ion sieve for nuclear waste solutions. Because of its layer structure, the adsorbed Cs can be directly fixed in γ-ZrP by collapsing the layers upon heat treatment. Fixation of 96 and 98% of the adsorbed Cs was achieved by simple heat treatment at 350°C and 600°C respectively. Thus, heat treatment of this γ-ZrP leads to a good radiophase with good leach resistance. Cs sorbed γ-ZrP can also be converted to CsZr2(PO4)3 [;sodium zirconium phosphate (NZP) radiophase] by sintering with ammonium monobasic phosphate and zirconyl nitrate at about 850°C. Thus, γ-ZrP serves as a precursor to CsZr2(PO4)3 radiophase which has comparable leach resistance to other phases under consideration for radio-Cs immobilization.

Comparison of sodium zirconium phosphate and calcium zirconium phosphate structures for the retention of fluoride

2013 ◽  
Vol 299 (1) ◽  
pp. 19-24 ◽  
Author(s):  
Ambarish Dey ◽  
Amit Das Gupta ◽  
Debrata Basu ◽  
Ritu D. Ambashta ◽  
P. K. Wattal ◽  
...  
Keyword(s):  
Zirconium Phosphate ◽  
Sodium Zirconium ◽  
Sodium Zirconium Phosphate
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