Radiolytic organics in γ-ray irradiated aqueous solution of N,N-diethylhydroxylamine

Radiolytic organics in γ-ray irradiated aqueous solution of N , N -diethylhydroxylamine 1 corresp first-author Corresponding author. E-mail address: jinhuawang@staff.shu.edu.cn Corresponding author. E-mail address: jinhuawang@staff.shu.edu.cn jinhuawang@staff.shu.edu.cn 1 1 1 1 1 2 2 2 Shanghai Applied Radiation Institute, School of Environmental and Chemical Engineering, Shanghai University, Shanghai 200444, China Shanghai Applied Radiation Institute, School of Environmental and Chemical Engineering, Shanghai University, Shanghai 200444, China Radiochemistry Department, China Institute of Atomic Energy, Beijing 102413, China Radiochemistry Department, China Institute of Atomic Energy, Beijing 102413, China N , N -diethylhydroxylamine (DEHA) is a novel salt-free reducing agent used in separating Pu and Np from U in the reprocessing of spent nuclear fuel. In this paper, we report the study on γ -radiolysis of DEHA in water and its radiolytic liquid organics by gas chromatography. The radiolysis rate of DEHA increases with the absorbed dose, but decreases with the primary DEHA concentration at 0.1–0.5 mol·L –1 irradiated to 10–1000 kGy. The main organics produced in radiolysis of DEHA are acetaldehyde, acetic acid and ethanol. The concentration of acetaldehyde increases with the primary DEHA concentration and the absorbed dose at ≤500 kGy, but over 500 kGy it decreases with increasing dose. The dependence of the concentration of acetic acid on the absorbed dose is similar to that of acetaldehyde, with a lower turning point of the dose, though. The ethanol concentration changes differently among the irradiated samples of different primary DEHA concentrations, and this is discussed. The maximum concentrations of acetaldehyde, acetic acid and ethanol are 0.029, 0.014 and 0.028 mol·L –1 , respectively. N ; N -Diethylhydroxylamine γ -radiolysis Liquid organics Reprocessing of spent fuel References Sze Y K , Gosselin J A . Nucl Technol , 1983 , 63 : 431 - 441 . Nucl Technol Mckibben J M , Bercaw J E . DP-1248 , 1971 , 1 - 22 . DP-1248 Ochsenfeld W , Petrich G . Separation Sci Technol , 1983 , 18 : 1685 - 1698 . Separation Sci Technol Koltunov V S , Baranov S M , Zharova T P . Radiokhimiya , 1993 , 35 : 79 - 84 . Radiokhimiya Zhang A Y , Hu J X , Zhang X Y , et al . At Energy Sci Technol , 1999 , 33 : 97 - 103 . (in Chinese) At Energy Sci Technol Wang J H , Bao B R , Wu M H , et al . J Nucl Radiochem , 2004 , 26 : 103 - 107 . (in Chinese) J Nucl Radiochem Wang J H , Bao B. R , Wu M H , et al . J Radioanal Nucl Chem , 2004 , 262 : 451 - 453 . J Radioanal Nucl Chem Wang J H , Bao B R , Wu M H , et al . J Nucl Radiochem , 2006 , 28 : 249 - 252 . (in Chinese) J Nucl Radiochem Wang J H , Wang Sh X , Bao B H , et al . Nucl Sci Tech , 2008 , 19 : 79 - 82 . Nucl Sci Tech Wang J H , WAN Y , Wu M H , et al . Nucl Sci Tech , 2008 , 19 : 343 - 346 . Nucl Sci Tech Wu J L , Qi S C . Radiation Chemistry. Beijing: Atomic Energy Publications , 1993 , 156 - 198 . (in Chinese) Radiation Chemistry. Beijing: Atomic Energy Publications Spinks J W T , Woods R J . An introduction to radiation chemistry , 2 nd Ed. New York : Wiley-Interscience Publication, John Wiley & Sons , 1976 , 247 - 295 . An introduction to radiation chemistry Adamic K , Bowman D F , Gillan T , et al . J Am Chem Soc , 1971 , 93 : 902 - 908 . J Am Chem Soc 10.13538/j.1001-8042/nst.22.95-98 Supported by Natural Science Foundation of China (No.20771074, 40973073, 40830744) and Shanghai Leading Academic Disciplines (No. S 30109) . 2010-07-06 2011-04-20 2021-01-19 2011 Nuclear Science and Techniques 02 22