Abstract
In order to measure the half life of the double beta decay of U{sup 238}, a process for the recovery of trace amounts of Pu{sup 238} (about 30 000 atoms) from a 300 kg batch of depleted uranium has been studied and tested. The process includes a Pu (IV) valency adjustment step with nitrous oxide, followed by nine chromatographic cycles (plutonium decontamination factor up to 10{sup 11} have been achieved for Th, Pa and U). The procedure to realize the alpha spectrometry measurement has also been defined. Full scale apparatus have been set in the CRN facility near STRASBOURG. The first part of the experiment (U{sup 238} purification before one year aging and measurement of the extracted Pu{sup 238} traces) has been realized. The results of the Pu traces counting allows the validation of the chemical process but also show an important Pu{sup 238} contamination certainly a consequence of the TCHERNOBYL accident. (author). 76 refs., 63 tabs., 49 figs.
Citation Formats
Maillard, C.
Definition of a process for the recovery of ultra traces of Pu{sup 238} from a 300 Kg depleted uranium batch; Etude d`une procedure de separation d`ultra-traces de plutonium d`un echantillon de 300 Kg d`uranium appauvri en vue de determiner la periode du processus {sup 238}U -(2{beta}{sup -}){yields}{sup 238}Pu.
France: N. p.,
1992.
Web.
Maillard, C.
Definition of a process for the recovery of ultra traces of Pu{sup 238} from a 300 Kg depleted uranium batch; Etude d`une procedure de separation d`ultra-traces de plutonium d`un echantillon de 300 Kg d`uranium appauvri en vue de determiner la periode du processus {sup 238}U -(2{beta}{sup -}){yields}{sup 238}Pu.
France.
Maillard, C.
1992.
"Definition of a process for the recovery of ultra traces of Pu{sup 238} from a 300 Kg depleted uranium batch; Etude d`une procedure de separation d`ultra-traces de plutonium d`un echantillon de 300 Kg d`uranium appauvri en vue de determiner la periode du processus {sup 238}U -(2{beta}{sup -}){yields}{sup 238}Pu."
France.
@misc{etde_10136750,
title = {Definition of a process for the recovery of ultra traces of Pu{sup 238} from a 300 Kg depleted uranium batch; Etude d`une procedure de separation d`ultra-traces de plutonium d`un echantillon de 300 Kg d`uranium appauvri en vue de determiner la periode du processus {sup 238}U -(2{beta}{sup -}){yields}{sup 238}Pu}
author = {Maillard, C}
abstractNote = {In order to measure the half life of the double beta decay of U{sup 238}, a process for the recovery of trace amounts of Pu{sup 238} (about 30 000 atoms) from a 300 kg batch of depleted uranium has been studied and tested. The process includes a Pu (IV) valency adjustment step with nitrous oxide, followed by nine chromatographic cycles (plutonium decontamination factor up to 10{sup 11} have been achieved for Th, Pa and U). The procedure to realize the alpha spectrometry measurement has also been defined. Full scale apparatus have been set in the CRN facility near STRASBOURG. The first part of the experiment (U{sup 238} purification before one year aging and measurement of the extracted Pu{sup 238} traces) has been realized. The results of the Pu traces counting allows the validation of the chemical process but also show an important Pu{sup 238} contamination certainly a consequence of the TCHERNOBYL accident. (author). 76 refs., 63 tabs., 49 figs.}
place = {France}
year = {1992}
month = {Nov}
}
title = {Definition of a process for the recovery of ultra traces of Pu{sup 238} from a 300 Kg depleted uranium batch; Etude d`une procedure de separation d`ultra-traces de plutonium d`un echantillon de 300 Kg d`uranium appauvri en vue de determiner la periode du processus {sup 238}U -(2{beta}{sup -}){yields}{sup 238}Pu}
author = {Maillard, C}
abstractNote = {In order to measure the half life of the double beta decay of U{sup 238}, a process for the recovery of trace amounts of Pu{sup 238} (about 30 000 atoms) from a 300 kg batch of depleted uranium has been studied and tested. The process includes a Pu (IV) valency adjustment step with nitrous oxide, followed by nine chromatographic cycles (plutonium decontamination factor up to 10{sup 11} have been achieved for Th, Pa and U). The procedure to realize the alpha spectrometry measurement has also been defined. Full scale apparatus have been set in the CRN facility near STRASBOURG. The first part of the experiment (U{sup 238} purification before one year aging and measurement of the extracted Pu{sup 238} traces) has been realized. The results of the Pu traces counting allows the validation of the chemical process but also show an important Pu{sup 238} contamination certainly a consequence of the TCHERNOBYL accident. (author). 76 refs., 63 tabs., 49 figs.}
place = {France}
year = {1992}
month = {Nov}
}