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The use of 36Cl diffusion to asses changes in pore geometry of allophane soils resulting from drying
AbstractAbstract
[en] The apparent diffusion coefficient of 36Cl is used to assess pore geometric changes in allophane soil resulting from drying. The diffusion method is based on the boundary condition of a planar source diffusing into an infinite medium. The extent of structural changes accompanying drying was indicated by changes in slope of a plot between geometric and interaction factors versus volumetric moisture content. Structural change was least for freeze drying to be followed by a larger but equal change for air and oven drying. (M.A.C.)
[pt]
Utiliza-se o coeficiente de difusao aparente do 36Cl na avaliacao de mudancas na geometria dos poros, resultantes do secamento, em solos alofanos. Apresenta-se metodo de difusao baseado na condicao de contorno de uma fonte planar difundindo em um meio infinito. Conclui-se que o secamento por congelamento reduziu os fatores geometricos e de interacao, e o secamento por forno e por ar produziram uma reacao igual, que foi maior do que a produzida por congelamento. (M.A.C.)Primary Subject
Source
Sao Paulo Univ. (Brazil); Centro de Energia Nuclear na Agricultura, Piracicaba (Brazil); 275 p; 1984; p. 257-262; Regional Workshop on Nuclear Techniques in Crop Production; Piracicaba, SP (Brazil); 19-23 Nov 1984
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The use of 36Cl diffusion to asses changes in pore geometry of allophane soils resulting from drying
Holder, G.D.
Proceedings of the Regional Workshop on Nuclear Techniques in Crop Production - Abstracts1984
Proceedings of the Regional Workshop on Nuclear Techniques in Crop Production - Abstracts1984
AbstractAbstract
No abstract available
Primary Subject
Source
Sao Paulo Univ. (Brazil); Centro de Energia Nuclear na Agricultura, Piracicaba (Brazil); 103 p; 1984; p. 100; Regional Workshop on Nuclear Techniques in Crop Production; Piracicaba, SP (Brazil); 19-23 Nov 1984; Published in summary form only.
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Miscellaneous
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AbstractAbstract
No abstract available
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2001 spring meeting of Arbeitskreis Atome, Molekuele Quantenoptik und Plasmen (AMOP) and Fachverband Kurzzeitphysik der Deutschen Physikalischen Gesellschaft e.V. (DPG) and 7. European Conference on Atomic and Molecular Physics (ECAMP), with physics and book exhibition; Fruehjahrstagung 2001 des Arbeitskreises Atome, Molekuele Quantenoptik und Plasmen (AMOP) und des Fachverbandes Kurzzeitphysik der Deutschen Physikalischen Gesellschaft e.V. (DPG) und 7. European Conference on Atomic and Molecular Physics (ECAMP), mit Physik- und Buchausstellung; Berlin (Germany); 2-6 Apr 2001
Record Type
Journal Article
Literature Type
Conference
Journal
Verhandlungen der Deutschen Physikalischen Gesellschaft; ISSN 0420-0195;
; CODEN VDPEAZ; v. 36(5); p. 109

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AbstractAbstract
[en] The monitoring of long-lived radionuclides is of great importance in the context of the surveillance of nuclear facilities, during their operation as well as during their decommissioning. This is especially true for radionuclides of rather volatile elements, such as chlorine and iodine, the main interest being in 36Cl and 129I. Liquid Scintillation Counting (LSC) is a widely used measurement technique especially for the determination of 36Cl that requires a thorough and selective sample preparation in order to give accurate results. Sample preparation methods frequently employed such as volatilization and/or repeated precipitation steps can be rather elaborate and time consuming. Therefore, an attempt has been made to develop an 'easy to use' extraction chromatographic resin that allows extraction, and subsequent separation, of chloride and iodide from pretreated environmental and decommissioning samples for their determination via LSC. First results of the characterization of the resin including Dw values of Cl-, I- and potential interferents, and of the method development are presented as well as the result of the analysis of a simulated real sample. (author)
Primary Subject
Source
12 refs.
Record Type
Journal Article
Journal
Journal of Radioanalytical and Nuclear Chemistry; ISSN 0236-5731;
; CODEN JRNCDM; v. 286(2); p. 539-546

Country of publication
BETA DECAY RADIOISOTOPES, BETA-MINUS DECAY RADIOISOTOPES, BETA-PLUS DECAY RADIOISOTOPES, CHLORINE ISOTOPES, CHROMATOGRAPHY, ELECTRON CAPTURE RADIOISOTOPES, INTERMEDIATE MASS NUCLEI, INTERNAL CONVERSION RADIOISOTOPES, IODINE ISOTOPES, ISOTOPES, LIGHT NUCLEI, NUCLEI, ODD-EVEN NUCLEI, ODD-ODD NUCLEI, RADIOISOTOPES, SEPARATION PROCESSES, YEARS LIVING RADIOISOTOPES
Reference NumberReference Number
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Poncet, Bernard R.
WM Symposia, Inc., PO Box 27646, 85285-7646 Tempe, AZ (United States)2017
WM Symposia, Inc., PO Box 27646, 85285-7646 Tempe, AZ (United States)2017
AbstractAbstract
[en] Prior to 2005, the EDF initial version for the radiological inventory of graphite was based on the maximum values of the measures, namely a very pessimistic way. In 2008, a scientific method was developed by EDF to evaluate the inventory by reverse activation calculation, in order to limit the overestimation. The radiological inventory computation principles can be compared to those of all engineering studies. First, the calculation is simplified by taking margins, and if the results are not satisfactory enough, some simplifications are suppressed to reduce these margins even if computation becomes more complicated. On EDF piles, the gain obtained in 2008 represented a factor 50 relative to the initial version of Cl-36, even with a very penalizing multiplicative factor for uncertainty. Today, the accurate calculation of the uncertainty no longer justifies such a factor. A gain of about 150 now occurs compared to the initial version of Cl-36. It is more than 2 orders of magnitude, which is already enough to assess again the necessary type of disposal because Cl-36 is one of the key radionuclides. After global presentation of graphite waste management in France, the paper focuses on the inventory scientific process of EDF nuclear graphite, the purity of graphite and its consequences, its particular sampling, the lessons learned, the initial method description, the link with the demonstration of the completely random point process of chlorine in nuclear graphite and the last suggested precise uncertainty computation of inventory of Cl-36. The method confirmation for concentration assessment, the history of the EDF method development and its benefits are also emphasized. (authors)
Primary Subject
Source
2017; 11 p; WM2017 Conference: 43. Annual Waste Management Symposium; Phoenix, AZ (United States); 5-9 Mar 2017; Available from: WM Symposia, Inc., PO Box 27646, 85285-7646 Tempe, AZ (US); Country of input: France; 2 refs.; available online at: http://archive.wmsym.org/2017/index.html
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Herut, B.; Katz, A.; Starinsky, A.; Paul, M.; Boaretto, E.
Hebrew Univ., Jerusalem (Israel); Hebrew Univ., Jerusalem (Israel). Dept. of Physics
Annual Meeting of the Israel Geological Society, 19911991
Hebrew Univ., Jerusalem (Israel); Hebrew Univ., Jerusalem (Israel). Dept. of Physics
Annual Meeting of the Israel Geological Society, 19911991
AbstractAbstract
[en] Abstract only
Primary Subject
Source
Israel Geological Society, Jerusalem (Israel); 13 p; 1991; p. 53; Israel geological society annual meeting, 1991; Akko (Israel); 22-25 Apr 1991
Record Type
Miscellaneous
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Conference
Report Number
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ASIA, BETA DECAY RADIOISOTOPES, BETA-MINUS DECAY RADIOISOTOPES, BETA-PLUS DECAY RADIOISOTOPES, CHLORINE ISOTOPES, DEVELOPING COUNTRIES, ELECTRON CAPTURE RADIOISOTOPES, HYDROGEN COMPOUNDS, ISOTOPES, LIGHT NUCLEI, MIDDLE EAST, NUCLEI, ODD-ODD NUCLEI, OXYGEN COMPOUNDS, RADIOISOTOPES, WATER, YEARS LIVING RADIOISOTOPES
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AbstractAbstract
No abstract available
Primary Subject
Source
Available from http://dx.doi.org/10.1088/0952-4746/35/3/737; Abstract only; Country of input: International Atomic Energy Agency (IAEA)
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AbstractAbstract
[en] Published in summary form only
Primary Subject
Source
European Society of Nuclear Methods in Agriculture (ESNA); 238 p; 1988; p. 206; 19. annual meeting of the European society of nuclear methods in agriculture; Vienna (Austria); 29 Aug - 2 Sep 1988
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Miscellaneous
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Conference
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ANIMALS, BETA DECAY RADIOISOTOPES, BETA-MINUS DECAY RADIOISOTOPES, BETA-PLUS DECAY RADIOISOTOPES, CHLORINE COMPOUNDS, CHLORINE ISOTOPES, ELECTRON CAPTURE RADIOISOTOPES, HALOGEN COMPOUNDS, ISOTOPE APPLICATIONS, ISOTOPES, LIGHT NUCLEI, MAMMALS, NITROGEN COMPOUNDS, NUCLEI, ODD-ODD NUCLEI, OXYGEN COMPOUNDS, RADIOISOTOPES, RODENTS, VERTEBRATES, YEARS LIVING RADIOISOTOPES
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Andrzejewski, J.; Gledenov, Yu.M.; Vertebnyj, V.P.
Joint Inst. for Nuclear Research, Dubna (USSR). Lab. of Neutron Physics1987
Joint Inst. for Nuclear Research, Dubna (USSR). Lab. of Neutron Physics1987
AbstractAbstract
[en] The results are reported on the measurement of the thermal cross section of the (n,p) reaction for the 36Cl radioactive nucleus. For spectrometry analysis and identification of low-energy charged particles the ionization chamber with two grids was used. For the first time the thermal cross section has been found to be equal σ(nth,p)=0.4 ±0.1 b. It makes possible to determine the 36Cl/35Cl ratio on the 10-8 level, which could be interesting for the isotope chronology
Original Title
Izmerenie teplovogo secheniya reaktsii 36Cl(n,p)36S
Primary Subject
Source
1987; 8 p; 24 refs.; 3 figs.
Record Type
Report
Literature Type
Numerical Data
Report Number
Country of publication
BARYON REACTIONS, BARYONS, BETA DECAY RADIOISOTOPES, BETA-MINUS DECAY RADIOISOTOPES, BETA-PLUS DECAY RADIOISOTOPES, CATIONS, CHARGED PARTICLES, CHLORINE ISOTOPES, DATA, ELECTRON CAPTURE RADIOISOTOPES, ELEMENTARY PARTICLES, EVEN-EVEN NUCLEI, FERMIONS, HADRON REACTIONS, HADRONS, HYDROGEN IONS, HYDROGEN IONS 1 PLUS, INFORMATION, IONS, ISOTOPES, LIGHT NUCLEI, NEUTRONS, NUCLEAR REACTIONS, NUCLEI, NUCLEON REACTIONS, NUCLEONS, NUMERICAL DATA, ODD-EVEN NUCLEI, ODD-ODD NUCLEI, RADIOISOTOPES, SPECTRA, STABLE ISOTOPES, SULFUR ISOTOPES, TARGETS, YEARS LIVING RADIOISOTOPES
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AbstractAbstract
[en] This paper reports on the results of measurements of the (n,p) and (n,α) reactions on 26Al and 36Cl, in the neutron energy region up to 140 keV and 350 keV, respectively. The experiments were carried out at the GELINA neutron facility of the IRMM (Geel, Belgium). For both reactions several resonances could be identified which were never observed before. Using the obtained cross section data, reaction rates were calculated and compared with other experimental and theoretical values
Primary Subject
Source
8. international symposium on nuclei in the cosmos; Vancouver, BC (Canada); 19-23 Jul 2004; S0375-9474(05)00657-3; Copyright (c) 2005 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA)
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Journal Article
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Conference
Journal
Country of publication
ALUMINIUM ISOTOPES, BARYON REACTIONS, BARYONS, BETA DECAY RADIOISOTOPES, BETA-MINUS DECAY RADIOISOTOPES, BETA-PLUS DECAY RADIOISOTOPES, CHLORINE ISOTOPES, ELECTRON CAPTURE RADIOISOTOPES, ELEMENTARY PARTICLES, ENERGY RANGE, FERMIONS, HADRON REACTIONS, HADRONS, ISOTOPES, KINETICS, LIGHT NUCLEI, NUCLEAR REACTIONS, NUCLEI, NUCLEON REACTIONS, NUCLEONS, ODD-ODD NUCLEI, RADIOISOTOPES, REACTION KINETICS, SECONDS LIVING RADIOISOTOPES, TARGETS, YEARS LIVING RADIOISOTOPES
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