Methodology for Determination of Initial Boiling Point in Fuel Assemblies by Acoustic Noise Analysis

Nuclear and Radiation Safety ◽

10.32918/nrs.2016.3(71).09 ◽

2016 ◽

pp. 48-55 ◽

Cited By ~ 1

Author(s):

G. Sharaievskyi

Keyword(s):

Heat Flow ◽

Boiling Point ◽

Acoustic Noise ◽

Noise Analysis ◽

Vapour Phase ◽

Noise Spectrum ◽

Initial Boiling Point ◽

Physical Conditions ◽

Fuel Assemblies

The paper justifies the need for considering differences in physical conditions to define vapour phase initiation in various types of thermohydraulic cells of fuel assemblies. The computer analysis of coolant boiling conditions was performed based on available computer dependencies. The research defines significant differences in calculation of heat flow values regarding vapour phase initiation for piping and fuel assemblies. An efficient algorithm of neurocomputing analysis of acoustic noise spectrum was proposed and implemented to detect the initial boiling point.

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Determination of the hydrocracking and hydroisomerization activities of catalysts containing zeolites Y and ZSM-5 for high boiling hydrocarbons conversion

Collection of Czechoslovak Chemical Communications ◽

10.1135/cccc19871545 ◽

1987 ◽

Vol 52 (6) ◽

pp. 1545-1549

Author(s):

Jolanta R. Grzechowiak ◽

Aleksandra Masalska

Keyword(s):

Boiling Point ◽

Freezing Point ◽

Liquid Product ◽

Space Velocity ◽

Initial Boiling Point ◽

Hydrocracking Process ◽

Silica Alumina ◽

Oil Cracking

Hydrocracking, hydroisomerization activities and selectivities were investigated using silica-alumina, silica-alumina-Y, and silica-alumina-ZSM-5 catalysts. The results show that white oil cracking activity of H-ZSM-5-containing catalyst is much higher than the cracking activity of H-Y. The work has shown that it is possible to carry out hydrocracking process at temperature 593-613 K and space velocity 2-3 h-1 (pressure 5·1 MPa, H2 : CH = 500 Nm3 m-3 h-1) using H-ZSM-5 containing catalysts. In such conditions, 76-84 wt. % of liquid product from white oil was obtained. After removing the low boiling fraction (below the initial boiling point of the feed), the lowering of the freezing point from 252 to 235 K was noticed.

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DETERMINATION OF QUANTITATIVE CONTENT OF CHARGE STOCKS IN GASOLINE AND DIESEL FUEL BINARY MIXTURE

Theory and Practice of Forensic Science and Criminalistics ◽

10.32353/khrife.2.2020.29 ◽

2021 ◽

Vol 22 (2) ◽

Author(s):

V. Rudniev ◽

A. Klimchuk ◽

O. Bui ◽

L. Nardid ◽

V. Koval

Keyword(s):

Diesel Fuel ◽

Boiling Point ◽

Target Component ◽

Gas Liquid Chromatography ◽

Chromatography Method ◽

Strong Negative Correlation ◽

Initial Boiling Point ◽

True Value ◽

Fuel Mixtures

An approach to establishing quantitative indicators of the composition of gasoline and diesel fuel mixtures with determination of the content of charge stocks is presented. Correctness indicator of the method, as a measure of deviation from a true value, was 6.5% volume while studying the model sample. As an auxiliary method for qualitative determination of gasoline or diesel fuel, the method of fractional distillation (distillation) at atmospheric pressure was used. Determination of the fractional composition of the mixtures was carried out under normal conditions for charge stocks as well as their mixtures with a concentration range of predominantly 10% volume. Research has shown a significant increase in the final boiling point temperature with availability of even a small amount of diesel fuel in gasoline as well as decrease in the initial boiling point when adding gasoline to diesel fuel. The study by gas-liquid chromatography method made it possible to establish an approximate boundary of gasoline components redistribution: diesel fuel mixtures when their proportions are changed. It was noted that the main redistribution of components occurs before and after adding n-Nonane which content in gasolines and diesel fuels is relatively small. Using the ratio of the sum of point areas eluting before n-Decane (without n-Nonane) and after n-Decane (including n-Nonane), considering unidentified ones, as the distribution coefficient of the source k components , it was possible to establish proportions of source components. The k coefficient dependence on the content of diesel fuel is nonlinear. Transition to linear relationship in the coordinates of the linear logarithm of the k coefficient and the content of diesel fuel showed the presence of strong negative correlation with the values of the coefficient of reliability of approximation from -0.982 to -0.997 for model mixtures. The practical application of the k coefficient to determine the content of gasoline and diesel fuel can be recommended when constructing narrow calibration dependences in the range from 20 to 40% (vol.) of the target component.

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