Determination of uranium, plutonium and selected fission products in the coolant of the KS-150 reactor

1979 ◽  
Vol 51 (1) ◽  
pp. 161-166
Author(s):  
M. Štubňa ◽  
J. Ričány ◽  
Š. Rohár ◽  
F. Šebesta ◽  
J. Sedláček ◽  
...  
Keyword(s):  
Fission Products ◽  
Uranium Plutonium

Atomization mechanism and determination of Ag, Be, Cd, Li, Na, Sn and Zn in uranium-plutonium matrices by ETA-AAS

1996 ◽  
Vol 354 (3) ◽  
pp. 311-315
Author(s):  
Neelam Goyal ◽  
Paru J. Purohit ◽  
A. G. Page ◽  
M. D. Sastry
Keyword(s):  
Atomization Mechanism ◽  
Uranium Plutonium

scholarly journals Experimental Determination of the Antineutrino Spectrum of the Fission Products ofU238

2014 ◽  
Vol 112 (12) ◽  
Author(s):  
N. Haag ◽  
A. Gütlein ◽  
M. Hofmann ◽  
L. Oberauer ◽  
W. Potzel ◽  
...  
Keyword(s):  
Experimental Determination ◽  
Fission Products ◽  
Antineutrino Spectrum

Accurate purification age determination of individual uranium–plutonium mixed particles

2015 ◽  
Vol 407 (23) ◽  
pp. 7165-7173 ◽  
Author(s):  
Yutaka Miyamoto ◽  
Daisuke Suzuki ◽  
Fumitaka Esaka ◽  
Masaaki Magara
Keyword(s):  
Age Determination ◽  
Uranium Plutonium

Deconvolution of alpha liquid scintillation spectra for quantitative analysis of actinide elements in water samples

2004 ◽  
Vol 92 (3) ◽  
Author(s):  
Jean Aupiais
Keyword(s):  
Quantitative Analysis ◽  
Water Samples ◽  
Environmental Samples ◽  
Liquid Scintillation ◽  
Isotopic Ratio ◽  
Ratio Determination ◽  
Alpha Beta ◽  
Uranium Plutonium ◽  
Actinide Elements

SummaryThe reliability and accuracy of actinide measurement in environmental samples strongly depend on theThe intensity of the internal conversions for thorium, uranium, plutonium and americium have been calculated and normalised to the intensity of the main alpha transition. These data can be used to determine the activity of any above-mentioned actinide by alpha liquid scintillation with alpha/beta discrimination. The quantitative analysis and the isotopic ratio determination of several certified solutions of actinides demonstrate the validity of this approach.

scholarly journals Control Experiences Regarding Clearable Materials from Nuclear Power Plants and Nuclear Installations: Scaling Factors Determination and Measurements’ Acceptance Criteria Definition

Environments ◽  
2019 ◽  
Vol 6 (11) ◽  
pp. 120
Author(s):  
Luca Albertone ◽  
Massimo Altavilla ◽  
Manuela Marga ◽  
Laura Porzio ◽  
Giuseppe Tozzi ◽  
...  
Keyword(s):  
Nuclear Power ◽  
Power Plants ◽  
Nuclear Power Plants ◽  
Fission Products ◽  
Scaling Factors ◽  
Activation Products ◽  
Long Time ◽  
Nuclear Installation ◽  
Enriched Uranium

Arpa Piemonte has been carrying out, for a long time, controls on clearable materials from nuclear power plants to verify compliance with clearance levels set by ISIN (Ispettorato Nazionale per la Sicurezza Nucleare e la Radioprotezione - National Inspectorate for Nuclear Safety and Radiation Protection) in the technical prescriptions attached to the Ministerial Decree decommissioning authorization or into category A source authorization (higher level of associated risk, according to the categorization defined in the Italian Legislative Decree No. 230/95). After the experience undertaken at the “FN” (Fabbricazioni Nucleari) Bosco Marengo nuclear installation, some controls have been conducted at the Trino nuclear power plant “E. Fermi,” “LivaNova” nuclear installation based in Saluggia, and “EUREX” (Enriched Uranium Extraction) nuclear installation, also based in Saluggia, according to modalities that envisage, as a final control, the determination of γ-emitting radionuclides through in situ gamma spectrometry measurements. Clearance levels’ compliance verification should be performed for all radionuclides potentially present, including those that are not easily measurable (DTM, Difficult To Measure). It is therefore necessary to carry out upstream, based on a representative number of samples, those radionuclides’ determination in order to estimate scaling factors (SF), defined through the logarithmic average of the ratios between the i-th DTM radionuclide concentration and the related key nuclide. Specific radiochemistry is used for defining DTMs’ concentrations, such as Fe-55, Ni-59, Ni-63, Sr-90, Pu-238, and Pu-239/Pu-240. As a key nuclide, Co-60 was chosen for the activation products (Fe-55, Ni-59, Ni-63) and Cs-137 for fission products (Sr-90) and plutonium (Pu- 238, Pu-239/Pu-240, and Pu-241). The presence of very low radioactivity concentrations, often below the detection limits, can make it difficult to determine the related scaling factors. In this work, the results obtained and measurements’ acceptability criteria are presented, defined with ISIN, that can be used for confirming or excluding a radionuclide presence in the process of verifying clearance levels’ compliance. They are also exposed to evaluations regarding samples’ representativeness chosen for scaling factors’ assessment.

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