Filters
Results 1 - 10 of 637
Results 1 - 10 of 637.
Search took: 0.024 seconds
Sort by: date | relevance |
AbstractAbstract
[en] A study of factors affecting the leaching of caesium from hollandite has been undertaken. It was found that Cs leach rates from SYNROC could be lowered if sufficiently reducing conditions (near or below Fe-FeO) prevailed during hot pressing
Primary Subject
Secondary Subject
Source
Australian Ceramic Society, Kensington; 389 p; 1982; p. 149-150; Australian Ceramic Society; Melbourne (Australia); 10. Australian ceramic conference; Melbourne (Australia); 24 - 27 Aug 1982
Record Type
Book
Literature Type
Conference
Country of publication
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
Ramm, E.J.; Reeve, K.D.; Woolfrey, J.L.
3rd AINSE engineering conference, 12th-13th November, 19811981
3rd AINSE engineering conference, 12th-13th November, 19811981
AbstractAbstract
No abstract available
Primary Subject
Source
Australian Inst. of Nuclear Science and Engineering, Lucas Heights; 51 p; Nov 1981; p. 31; 3. AINSE engineering conference; Lucas Heights, Australia; 12 - 13 Nov 1981; abstract only.
Record Type
Miscellaneous
Literature Type
Conference
Report Number
Country of publication
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
AbstractAbstract
[en] SYNROC-B has been proposed as a vehicle for the immobilisation of solidified radioactive waste. It consists of an assemblage of three synthetic mineral phases: perovskite, barium hollandite and zirconolite. The results of a study of the formation and fabrication of each mineral phase and of undoped SYNROC-B from its oxide components are reported
Primary Subject
Source
Australian Ceramic Society, Kensington; 347 p; 1980; p. 105-111; Australian Ceramic Society; Sydney, Australia; 9. Australian ceramic conference; Sydney, Australia; 27 - 29 Aug 1980; 4 refs.
Record Type
Book
Literature Type
Conference
Country of publication
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
AbstractAbstract
[en] Abstract only
Primary Subject
Secondary Subject
Source
AUSTCERAM 88; Sydney (Australia); 22-26 Aug 1988
Record Type
Journal Article
Literature Type
Conference
Journal
Country of publication
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
AbstractAbstract
[en] X-ray photoelectron spectroscopy detected all elemental species of the major phases in Synroc C as well as some important high level waste species. Abundances and chemical states of the elements after leaching of Synroc were investigated. SIMS was used to study the incorporation of Cs in Synroc C
Primary Subject
Source
Australian Inst. of Nuclear Science and Engineering, Lucas Heights; 201 p; Nov 1983; p. 178; 3. Australian conference on nuclear techniques of analysis; Lucas Heights (Australia); 1-3 Nov 1983
Record Type
Miscellaneous
Literature Type
Conference
Report Number
Country of publication
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
Levins, D.M.; Janov, J.; Ryan, R.K.; Vilkaitis, V.K.; Chapman, J.F.; Dale, L.S.
3rd AINSE engineering conference, 12th-13th November, 19811981
3rd AINSE engineering conference, 12th-13th November, 19811981
AbstractAbstract
No abstract available
Primary Subject
Secondary Subject
Source
Australian Inst. of Nuclear Science and Engineering, Lucas Heights; 51 p; Nov 1981; p. 32; 3. AINSE engineering conference; Lucas Heights, Australia; 12 - 13 Nov 1981; abstract only.
Record Type
Miscellaneous
Literature Type
Conference
Report Number
Country of publication
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
AbstractAbstract
[en] The work of ANSTO and its predecessor, the Australian Atomic Energy Commission, in ceramics research and development is briefly reviewed. The early work was on beryllium oxide and uranium oxide fuel. In 1979 the ceramic focus moved to the Synroc process for the immobilisation of high level nuclear waste. This work continues. Four new projects, all collaborative ventures with Australian industries, have begun in recent years. These are a ceramic collar for an advanced pacemaker electrode, preparation of superconductor feed powders, development of special components for medical/veterinary ultrasonic diagnostic probes, and the production of dense structural ceramics with extremely small grain sizes which exhibit ductility at relatively low temperatures
Original Title
ANSTO
Primary Subject
Record Type
Journal Article
Journal
Australian Technology Review; ISSN 0819-5943; ; v. 3(2); p. 34-35
Country of publication
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
Vencato, I.; Amorim, H.S. de; Amaral Junior, M.R. do; Moreira, L.F.; Mattievich, E.; Mascarenhas, Y.P.
Proceedings of the 12. National Meeting on Condensed Matter Physics1989
Proceedings of the 12. National Meeting on Condensed Matter Physics1989
AbstractAbstract
[en] Published in summary form only
Original Title
Estudo cristalografico da serie sintetica : (Fe2+x, Mn2+)5-x (PO4H)2 (PO4)2 (H2O)4 (hureaulita)
Source
Sociedade Brasileira de Fisica, Sao Paulo, SP (Brazil); 301 p; 1989; p. 50; 12. National Meeting on Condensed Matter Physics; Caxambu, MG (Brazil); 9-13 May 1989; Available from the Library of Comissao Nacional de Energia Nuclear, RJ, Brazil
Record Type
Miscellaneous
Literature Type
Conference
Country of publication
LanguageLanguage
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
AbstractAbstract
[en] Syenitic rocks are potential Sources of uranium thorium niobium, zirconium yttrium and cerium. Vast syenitic terrains in Peninsular and Extra-Peninsujar India remain uncharacterised geochemically. Therefore, it is essential to delineate syenitic rocks anomalously enriched in these rare-elements. The paper proposes a simple, accurate, precise, rapid and non-destructive wavelength-dispersive X-ray fluorescence spectrometric technique for determining uranium thorium, niobium, zirconium, yttrium and cerium in syenitic rocks. The paper proposes a simple, accurate, precise, rapid, and non-destructive wavelength-dispersive X-ray fluorescence spectrometric technique for determining uranium, thorium, niobium, zirconium, yttrium, and cerium in syenitic rocks. The technique uses a sequential X-ray fluorescence spectrometer, 100 kV - 80 mA - 3 kW X-ray generator, rhodium X-ray tube, LiF 220 analysing crystal, fine (150 μm) collimator, air path, scintillation detector, short counting times, and the international syenite standards, SY-2 and SY-3, and secondary standards generated from them. The accuracy of the technique is excellent (within 3% for thorium, niobium, and cerium) and very good (within 5% for uranium, zirconium, and yttrium). The precision is also excellent (within 2% for uranium, thorium, niobium, zirconium, and yttrium) and very good (within 7% for cerium). The lower limits of detection for the six elements are: uranium = 7 ppm; thorium = 6 ppm; niobium, zirconium, and yttrium = 2 ppm; and cerium = 44 ppm. The time taken for determining uranium, thorium, niobium, zirconium, yttrium, and cerium in a batch of twenty four samples of syenitic rocks, for a replication of four analyses per sample, by one operator, using a manual wavelength-dispersive X-ray fluorescence spectrometer, is only twenty four hours. (author)
Primary Subject
Source
6 refs., 4 figs., 4 tabs.
Record Type
Journal Article
Journal
Journal of Applied Geochemistry; ISSN 0972-1967; ; v. 13(2); p. 149-158
Country of publication
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
Reuschle, T.; Bernard, J.D.
Clays in natural and engineered barriers for radioactive waste confinement2005
Clays in natural and engineered barriers for radioactive waste confinement2005
AbstractAbstract
[en] The role of mechanical damage on the evolution of permeability was studied on synthetic argillaceous rocks made of sand, cement and clay. An experimental set-up was developed in order to produce synthetic rock samples made of the above mentioned components in fixed proportions. The mixture is introduced in a tubular mould of internal diameter 20 mm. A uniaxial compression of 10 kN is applied on the mixture to allow better grain contacts and to reduce the residual porosity. In a first step the procedure has been validated on a sand-cement mixture. We measured the uniaxial compressive strength as a function of cement content. The results clearly show a non-linear dependence between both parameters. This can be interpreted as a percolation problem in a medium containing two phases: sand grains and cement matrix. In a second step, the same procedure has been applied on a sand-clay mixture. Again the uniaxial compressive strength was measured as a function of clay content. Like for cement, the results show a non-linear dependence which can be explained as a percolation transition. A second experimental set-up was developed in order to measure the gas (N2) permeability of the synthetic samples. A hydrostatic cell (20 MPa) was designed with water as confining fluid. The sample is isolated from the confining pressure fluid by a Viton jacket clamped on the end pieces connected to the pore circuit. The upstream pore pressure circuit contains the pressurized gas bottle and a pressure transducer, the gas outflow being measured by a volumetric flowmeter in the downstream portion which is kept at atmospheric pressure. Permeability is measured using the stationary flow method. Confining pressure has been kept constant and equal to 3 MPa. Pore pressure is then changed to allow for Forchheimer and Klinkenberg corrections in order to determine the true permeability of the specimen. The procedure has been validated on samples composed of sand and clay pre-compacted at 10 kN. The results show the drastic decrease of permeability (10-12 to 10-15 m2) as clay content is increased from 10 to 40% ) Next we have checked the residual effect of mechanical damage on pre-compacted samples containing sand, cement and clay. Cement proportion has been kept constant and sand and clay content were varied accordingly. The samples were loaded in a uniaxial press up to increasing stress levels, unloaded, and introduced in the hydrostatic cell. Their apparent gas permeability was measured by keeping the pore pressure constant. The preliminary results show that for low clay content a slight permeability decrease precedes a rapid increase (from 3 10-19 to 2.5 10-18 m2 ) as one approaches the peak stress of the deformation curve. This effect of mechanical damage is less pronounced when increasing clay content. (authors)
Primary Subject
Source
Agence Nationale pour la Gestion des Dechets Radioactifs, ANDRA, 92 - Chatenay Malabry (France); 723 p; 2005; p. 666; 2. international meeting clays in natural and engineered barriers for radioactive waste confinement; Tours (France); 14-18 Mar 2005
Record Type
Miscellaneous
Literature Type
Conference
Report Number
Country of publication
Reference NumberReference Number
Related RecordRelated Record
INIS VolumeINIS Volume
INIS IssueINIS Issue
1 | 2 | 3 | Next |