National Repository of Grey Literature 5 records found  Search took 0.00 seconds. 
Determination of reference values of element contents in certified reference material SWCNT-1 by INAA a PGAA
Kučera, Jan ; Sturgeon, R. E. ; Grinberg, P. ; Oflaz, R. ; Paul, R. L. ; Bennett, J. W. ; De Nadai Fernandes, E. A. ; Kubešová, Marie ; Bacchi, M. A. ; Stopic, A. J.
Instrumental neutron activation analysis with both relative and k-0 standardization was used in four experienced laboratories to determine element mass fractions in single-wall carbon nanotube certified reference material (CRM) SWCNT-1. Results obtained were evaluated using the NIST “Type B On Bias” approach and yielded consensus values in agreement with NRCC certified values for Fe, Co, Ni and Mo and provided mass fraction values for thirteen additional elements, namely Na, Mg, Al, K, Ca, Ti, V, Cr, Mn, Br, La, W and Au. In addition, prompt gamma neutron activation analysis was employed to determine mass fractions of H, B, Co, Ni, and Mo. Results of this work provide a basis for the establishment of reference values of element mass fractions in CRM SWCNT-1, thus expanding its usability for more accurate characterization and benchmarking of similar nanotechnology materials.
Determination of elemental impurities in polymer materials of electrical cables of safety systems of nuclear power plants by neutron activation analysis
Kučera, Jan ; Kubešová, Marie ; Bartoníček, B.
Instrumental neutron activation analysis (INAA) was employed for elemental characterization of individual components of electrical cables currently used in safety systems of nuclear power plants (NPP). The analysis yielded information about the content of 35 elements. It has been found that the cables do not satisfy requirements of qualification set for the new generation of NPP by „The European Utility Requirements for LWR Nuclear Power Plants”, because content of several elements exceeded the maximal impurity levels. INAA proved to be a method of choice for elemental characterization of polymer materials of electrical cables as part of their qualification for use in NPP.
How to calculate uncertainties of neutron flux parameters and uncertainties of analysis results?
Kubešová, Marie ; Kučera, Jan
A novel method has been developed for the calculation of uncertainties of neutron flux parameters and element mass fractions and their uncertainties in k0-neutron activation analysis (k0-NAA) using the Kragten universally applicable spreadsheet technique. The results obtained are compared with other approaches for evaluation of uncertainties of the neutron flux parameters and element mass fractions, namely with the Kayzero for Windows, k0-IAEA and ERON programs.

See also: similar author names
1 KUBEŠOVÁ, Magdalena
2 KUBEŠOVÁ, Marcela
1 KUBEŠOVÁ, Marta
1 KUBEŠOVÁ, Miroslava
2 Kubešová, Marie,
2 Kubešová, Michaela
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