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http://dx.doi.org/10.7844/kirr.2017.26.5.97

The Effects of the Residual Ba and Zr on the Acid Pickling in Case of the Recovering of Zr in Pickling Waste Acid through the BaF2 Precipitation Process  

An, Chang Mo (KEPCO Nuclear Fuel Company, Ltd. Tube Forming Team)
Choi, Jeong Hun (Graduate School of Department of Materials Science & Engineering, Chungnam National University)
Han, Seul Ki (KAERI (Korea Atomic Energy Research Institute))
Park, Chul Ho (KEPCO Nuclear Fuel Company, Ltd. Tube Forming Team)
Kahng, Jong Won (KEPCO Nuclear Fuel Company, Ltd. Tube Forming Team)
Lee, Young Jun (RASOM, Chungnam National University)
Lee, Jong Hyeon (Graduate School of Department of Materials Science & Engineering, Chungnam National University)
Publication Information
Resources Recycling / v.26, no.5, 2017 , pp. 97-104 More about this Journal
Abstract
Nuclear fuel cladding tubes are manufactured through pilgering and the annealing process. In order to remove the oxidized layer and impurities on the surface of the tube, a pickling process is required. Zirconium (Zr) is dissolved in a HF and $HNO_3$ acid mixture during the process and the pickling waste acid, including the dissolved Zr, is completely discarded after neutralization. This study observes the effects of the residual impurities (Ba) in the pickling solution regenerated from the $BaF_2$ precipitation process on the waste pickling solution. In addition, the concentration of Ba and Zr for the actual nuclear fuel cladding tube process was optimized. The regenerated pickling solution was tested through a pilot plant pickling process device that simulates the commercial pickling process of nuclear fuel cladding tubes, and the pickling efficiency was analyzed through AFM analysis of the roughness of the cladding tube surface.
Keywords
Zr-Alloy; Cladding tube; Acid pickling; regenerated pickling solution;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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1 Lee, M. S., et al., 2011 : Distribution of Zr(IV) ion species in aqueous solution, J. of Korean Inst. Resources Recycling, 20(6), pp.56-62.   DOI
2 Lee, J. E., et al., 2013 : A study of cleaning technology for Zirconium scrap recycling in the nuclear industry, Clean tech., 19(3), pp.264-271.   DOI
3 Cho, N. C., Lee, J. M., and Hong, S. I., 2011 : Processing of Low Tin Zr-1Nb-0.69Sn-0.11Fe Alloy Tubes and Effect of Final Heat Treatment on Their Mechanical and Corrosion Properties, Kor. J. Met. Mater., 49(1), pp.17-24.   DOI
4 Park, J. Y., et al., 2001 : Corrosion Behavior and Mechanical Properties of TREX in Manufacturing Process of K1 and K2 cladding tube, J. Korea Nuclear Society, pp.247-259.
5 Kim, D. J., et al., 2001 : Effects of the Accumulated Annealing Parameter on the Corrosion Characteristics of New Zr-based Alloys for Fuel Cladding, Kor. J. Met. Mater., 39(9), pp.1040-1049.
6 Babu, C. A., et al., 1993 : Removal of fluoride from pickling waste with zirconium, Waste Management, 13(3), pp.279-283.   DOI
7 Walker, R. G., 1992 : Process of regenerating spent HF-$HNO_3$ pickle acid containing ${ZrF_6}^{-2}$, U.S. Patent No. 5,082,523.
8 Rynasiewicz, J., 1986 : Zircaloy pickle bath salts: Chemical natuke and thermal decomposition of a hydkated zirconium fluoride, J. Nuclear Material, 12(2), pp153-158.   DOI
9 Kim, B. M., 1986 : Process for recovery of zirconium and acid from spent etching solutions, U.S. Patent No. 4,572,824.
10 Lamaze, A. P., 1980 : Process for recovering acids and zirconium contained in pickling solutions, U.S. Patent No. 4,200,612.
11 Stewart, T. L. and Jones, E. O., 1990 : Recycling and Treatment of Metal-Bearing Spent Acids, Met. Waste management, pp.153-161.
12 Babu, C. A. et al., 1993 : Removal of fluoride from pickling waste with zirconium, Waste Management, 13(3), pp.279-283.   DOI
13 Nersisyan, H. H., et al., 2017 : Two-step process of regeneration of acid(s) from $ZrF_4$ containing spent pickle liquor and recovery of zirconium metal, J. Nuclear Materials, 486, pp.44-52.   DOI