The organics in γ-ray irradiated aqueous N, N-diethylhydroxylamine (DEHA) solution, which is used as a reducing agent in reprocessing spent nuclear fuel, were analyzed with gas chromatography equipped with FFAP capil...The organics in γ-ray irradiated aqueous N, N-diethylhydroxylamine (DEHA) solution, which is used as a reducing agent in reprocessing spent nuclear fuel, were analyzed with gas chromatography equipped with FFAP capillary column and flame-ionization detector. It was found that irradiated DEHA solutions contained acetaldehyde, ethanol, and acetic acid. For DEHA of 0.2 mol/L irradiated to 10~1000 kGy, the concents of acetaldehyde, ethanol and acetic acid are (9.7~18.7)×10-3, (0.4~23.4)×10-3 and (6.5~11.7)×10-3 mol/L, respectively. The concentration of DEHA decreases obviously with the dose.展开更多
In this paper,gaseous products generated by radiation degradation of N,N-diethylhydroxylamine (DEHA) in aqueous solution are studied.The results show that by 10～1000 kGy irradiation of the solution in DEHA concentrat...In this paper,gaseous products generated by radiation degradation of N,N-diethylhydroxylamine (DEHA) in aqueous solution are studied.The results show that by 10～1000 kGy irradiation of the solution in DEHA concentration of 0.1～0.5 mol·L^(-1),the gaseous products were mainly hydrogen,methane,ethane and ethene.The volume fraction of hydrogen did not change much with different concentrations of DEHA.The volume fraction of methane and ethane decreased,but that of ethene increased,with increasing DEHA concentration.The volume fraction of hydrogen,methane and ethane increased with the dose.The relationship of the volume fraction of ethene with the dose had something to do with the DEHA concentration.展开更多
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...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.展开更多
基金Supported by National Natural Science Foundation of China (20771074)
文摘The organics in γ-ray irradiated aqueous N, N-diethylhydroxylamine (DEHA) solution, which is used as a reducing agent in reprocessing spent nuclear fuel, were analyzed with gas chromatography equipped with FFAP capillary column and flame-ionization detector. It was found that irradiated DEHA solutions contained acetaldehyde, ethanol, and acetic acid. For DEHA of 0.2 mol/L irradiated to 10~1000 kGy, the concents of acetaldehyde, ethanol and acetic acid are (9.7~18.7)×10-3, (0.4~23.4)×10-3 and (6.5~11.7)×10-3 mol/L, respectively. The concentration of DEHA decreases obviously with the dose.
基金Natural Science Foundation of China (Contract No.20771074)Shanghai Leading Academic Disciplines (Contract No.T0105)
文摘In this paper,gaseous products generated by radiation degradation of N,N-diethylhydroxylamine (DEHA) in aqueous solution are studied.The results show that by 10～1000 kGy irradiation of the solution in DEHA concentration of 0.1～0.5 mol·L^(-1),the gaseous products were mainly hydrogen,methane,ethane and ethene.The volume fraction of hydrogen did not change much with different concentrations of DEHA.The volume fraction of methane and ethane decreased,but that of ethene increased,with increasing DEHA concentration.The volume fraction of hydrogen,methane and ethane increased with the dose.The relationship of the volume fraction of ethene with the dose had something to do with the DEHA concentration.
基金Supported by Natural Science Foundation of China(No.20771074,40973073,40830744)Shanghai Leading Academic Disciplines(No.S30109)
文摘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.
