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Monday, November 9, 2020 | History

2 edition of Modelling the oxidation of defected fuel elements found in the catalog.

Modelling the oxidation of defected fuel elements

Frank Garisto

Modelling the oxidation of defected fuel elements

  • 192 Want to read
  • 29 Currently reading

Published by Whiteshell Laboratories in Pinawa, Man .
Written in English

    Subjects:
  • Spent reactor fuel -- Canada -- Storage

  • Edition Notes

    Statementby Frank Garisto.
    SeriesAECL research (Series) -- 10734
    Classifications
    LC ClassificationsTK9360 .G27 1993
    The Physical Object
    Pagination34 p. :
    Number of Pages34
    ID Numbers
    Open LibraryOL15517119M

    Start studying FS Ch. Learn vocabulary, terms, and more with flashcards, games, and other study tools. Search. Create. combustion on the surface of a solid fuel in the absence of heat high enough to pyrolyze the fuel. a very rapid oxidation reaction accompanied by the generation of a low-intensity pressure wave that can disrupt the. For example, elements like sulphur or nitrogen or chlorine have a very wide range of oxidation states in their compounds - and these obviously aren't transition metals. However, this variability is less common in metals apart from the transition elements.   Using quantum mechanical modelling within the formalism of density functional theory (DFT) and periodic boundary conditions, C. Lousada and P. Korzhavyi from The Royal Institute of Technology – KTH, Sweden, studied the mechanisms of the first stages of the oxidation of an aluminum surface, scanning through a variety of possible atomic Author: Cláudio Lousada, Pavel Korzhavyi. The oxidation state of free ion is the charge carried by it. The sum of all oxidation states in a neutral molecule is zero. The oxidation states of hydrogen is +1 and oxygen -2 with a few exceptions.

      Transport properties of gaseous and volatiles that constitute a significant fraction of the total fission products (FPs) in high burnup matrix play important role in the performance of nuclear fuel. The transport decides release and retention behaviors of the FPs and in turn governs the matrix swelling and mechanical interaction with : D. Das, M. Basu, S. Kolay, A. N. Shirsat.


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Modelling the oxidation of defected fuel elements by Frank Garisto Download PDF EPUB FB2

Get this from a library. Application of the integral method to modelling the oxidation of defected fuel elements. [Miroslav Kolář; Whiteshell Laboratories.].

Operation in a defected condi- tion can cause a reduced heat transfer in the fuel-to- sheath gap as well as oxidation of the fuel, which may degrade the thermal performance of the element. The principal use for thermodynamic data in connection with fuel oxidation modelling is the computation of the partial oxygen pressure.

A typical situation considers uranium oxide(s) in contact with gas mixtures Modelling the oxidation of defected fuel elements book H 2 and H 2 O, which fixes the P O 2 at any specified temperature. The thermodynamic data leading to Fig. 1, Fig. 2, Fig. 3 is expressed as equations for log 10 P O 2 in Table by: The fuel oxidation model must be further coupled to a heat conduction model in order to account for complex feedback mechanisms (i.e., the stoichiome- try deviation of the fuel is affected by the.

The results of the simulations for defected fuel elements with oxidized fuel of average O/U ratiosand are shown in Fig. These simulations include both the profiles for the temperature and the resulting stoichiometry deviation due to oxygen redistribution as a Cited by: 7. Although fuel molecules are more complex (Figure ) than the singlecarbon compounds depicted in Figurewhen a fuel is oxidized, the oxidation takes place one carbon at a time.

The carbon oxidation energy is used in some cases to create a compound with high phosphoryl transfer potential and in other cases to create an ion : Jeremy M Berg, John L Tymoczko, Lubert Stryer.

The share of gasoline engines based on direct injection (DI) technology is rapidly growing, to a large extend driven by their improved efficiency and potential to lower CO 2 emissions.

One downside of these advanced engines are their significantly higher particulate emissions compared to engines based on port fuel injection technologies [1].Gasoline particulate filters (GPF) are one Cited by: 9.

Our modelling approach should be valid for the combustion in EGR equipped IC-engines, but should also describe post-oxidation phenomena in the exhaust line. Therefore a detailed kinetic mechanism was developed providing information about the fuel oxidation and the impact of NOx.

The modelling of the NOx interactions with HC Modelling the oxidation of defected fuel elements book discussed in detail. Combustion is a complex oxidation reaction of a gas, liquid, or solid fuel that occurs at very high temperatures generating heat and light we call a flame. During combustion of a hydrocarbon (like those found in gas & diesel) oxygen oxidizes the carbon in the fuel to carbon dioxide and is itself reduced to water.4/5(5).

A Molecular Modelling Investigation of Selected Gasoline Molecules to Relate Oxidation Pathways to their Autoignition Behaviour An adaptation of the procedure originally developed by Twu and Coon for blend octane prediction is by: 5. study the effect of chemical composition and fuel properties on the combustion process.

Application of surrogates to the modeling of the ignition, oxidation, and combustion of conventional jet fuels will be discussed here, and the results of recent kinetic studies on the oxidation of surrogate kerosene mixtures will be presented. The diesel engine was developed in to allow the use of cost-saving diesel fuel.

At the time, the production of diesel was a relatively simple single cut within the atmospheric distillation process. Fuel quality was only a concern during winter months, and quality concerns were limited to the fuel’s cold properties, which were easily modified using additives or spark ignition fuel.

A diesel fuel surrogate model has been developed, consisting of 68 species and reactions representing the oxidation kinetics of a mixture of 70 % n-heptane and 30 % toluene. The model has been validated by comparison of simulated ignition delay times for the fuel components with shock tube experimental data.

Influence of Fuel Introduction Parameters on the Reactivity and Oxidation Process of Soot from a Gasoline Direct Injection Engine. Easter, Jordan. Abstract: Upcoming regulations, such as Euro 6c, decrease limits on allowable tailpipe particulate number emissions. These regulations may place some current gasoline engine technologies above Author: Jordan Easter.

Advanced Oxidation Processes for Water Treatment: Fundamentals and Applications, is an essential resource for water professionals around the globe who want to learn about solutions for effective water r the reader is an engineer, scientist, academic, student, water utility professional or work in the water treatment sector, this book has important and timely information on.

There are a few definitions of oxidation so it is worth having a look at them first before addressing the question. In its simplest form, oxidation is the addition of oxygen. In a combustion reaction oxygen is combined with the fuel source usually.

Kolar, Application of the integral method to modelling the oxidation of defected fuel elements, AECL Research Report, AECL, COG-I (). Kolar & M.K. Ali, Initial Conditions for the Semiclassical Wave Packet Treatment of Surface Scattering, Technical Report, University of Lethbridge, December In situ chemical oxidation (ISCO), a form of advanced oxidation processes and advanced oxidation technology, is an environmental remediation technique used for soil and/or groundwater remediation to reduce the concentrations of targeted environmental contaminants to acceptable levels.

ISCO is accomplished by injecting or otherwise introducing strong chemical oxidizers directly into the. Diesel fuel should satisfy the European standards of quality even after long-term storage.

The oxidation of diesel fuel, factors affecting this process, and their interaction mechanisms were studied in this work. Based on the results, conditions for the long-term storage of diesel fuel, including the type of storage tanks, can be by: 3.

Influence of Fuel Introduction Parameters on the Reactivity and Oxidation Process of Soot from a Gasoline Direct Injection Engine by Jordan E. Easter A dissertation submitted in partial fulfillment of the requirement for the degree of Doctor of Philosophy (Mechanical Engineering).

PREDICTING THE BEHAVIOUR OF DEFECTED CANDU FUEL OXIDATION IN AIR WITH THE USA DOE SEMI-EMPIRICAL MODEL FOR THE OXIDATION OF DEFECTED LWR FUEL: J. Freire-Canosa (NWMO (Nuclear Waste Management Organization)), Kingston, ON Canada: 13th International Conference on CANDU Fuel: Aug.

CNSC - IFB LOSS OF COOLING SEVERE. Combustion is a funny thing, even to those who have been studying it longer than I have. To begin with, all combustion processes involve oxidation (some possible exceptions) but not all oxidation reaction are combustion.

That makes combustion a su. An ASTM designation number identifies a unique version of an ASTM standard. Active Standard ASTM D | Developed by Subcommittee: D Book of Standards Volume: This test method provides a basis for the estimation of the oxidation stability of middle distillate fuels such as No.

2 fuel oil. The test method may not provide a. The principle of operation of a solid-oxide fuel cell (SOFC) involves reduction of molecular O 2 at the cathode, diffusion of the O 2-through a zirconia-based electrolyte, and oxidation of the.

CO Emissions = Fuel consumption [TJ] (1)2 Emission factor [t CO /TJ] Oxidation factor ⋅ ⋅⋅ where the fuel consumption is expressed in TJ (i.e. in weight or volume amount times net calorific value).

During combustion, most of the fuel oxidises to CO2, a small part may, however, stay in the ash or create soot. Oxidation, Ignition, and Soot Formation Characteristics of Jet Fuels Matthew Oehlschlaeger, Hsi-Ping Shen, Jeremy Vanderover, Shane Daley, and Andrew Berkowitz Mechanical and Aerospace Engineering Rensselaer Polytechnic Institute Sponsor: U.S.

Air Force Office of. Corrosion experiments with non-irradiated U3Si2-Al research reactor fuel samples were carried out in synthetic MgCl2-rich brine to identify and quantify the secondary phases because depending on their composition and on their amount, such compounds can act as a sink for the radionuclide release in final repositories.

Within the experimental period of days at 90 °C and anoxic conditions Author: Andreas Neumann, Martina Klinkenberg, Hildegard Curtius.

If you mean "the oxidation state +2 is stable for the elements of the alkali metals" then the statement is not correct.

$\endgroup$ – bobthechemist Sep 27 '13 at $\begingroup$ @bobthechemist no, i mean that the oxidation states +1 and + 2 are stable for the alkali and the alkali earth metals respectively. $\endgroup$ – user Sep.

Soot oxidation by OH has been represented by an equation developed by Neoh that includes the efficiency of OH radicals to react, the collision efficiency. The focus of this study is the theoretical development of the collision efficiency, enabling a more accurate prediction of soot oxidation where OH is the principle oxidizer.

In addition to the traditional parameters, such as OH concentration Cited by: 6. The compound contains atoms that have oxidation numbers other than zero, which change to oxidation numbers of zero when they break into elements. Single Replacement Redox Reactions Redox reactions in which a free element becomes an ion in a compound at an.

Students should write the definitions of slow combustion, rapid combustion, and extremely rapid combustion in their journals. Reinforce the concepts of combustion and oxidation reactions by inviting students to explore the On Fire section of PBS's NOVA Online site, Fireworks!, either individually in a computer lab or as a class via a digital.

A.D. Quastel, C. Thiriet, B.J. Lewis, E.C. Corcoran, fuel cracking in relation to fuel oxidation in support of an out-reactor instrumented defected fuel experiment, Proceedings of the 19th Pacific Basin Nuclear Conference (PBNC ), Vancouver, British Columbia, Canada, August Model-based Control Design of a Diesel Oxidation Catalyst Olivier Lepreux Yann Creff Nicolas Petit IFP Lyon, Technology, Computer Science and Applied Mathematics Division, BP 3, Solaize, France (e-mail: [email protected], @) Centre Automatique et Systèmes, Mathématiques et Systèmes, MINES.

I have noted down the available positive oxidation states of the first row of transition elements (on the Periodic Table) from the respective Wikipedia articles of the elements. $\ce{Sc} - 3, 2,1$ $\ce{Ti}. What's Inside: Oxidation Patterns in Motor Vehicle Fire Investigations _ Unraveling the Myths ARC BREAKDOWN IN AIR OVER VERY SMALL GAP DISTANCES.

F&AI contents We invite o to connect wit s nrnana an rn nars IAAIh Fire&Arson Investigator January 3 ire Arson Inestiator. pulverized char oxidation and large-particle combustion in fixed beds. The HP-CBK model was evaluated by comparison with five sets of experimental measurements: 1) graphite flake oxidation data; 2) rough sphere combustion data; 3) large particle oxidation data; 4) pulverized char drop-tube data, and 5) TGA and FFB data from this study.

reactions to occur during reforming of a producer gas in a reverse flow partial oxidation reactor. Validation of numerical model Soot formation during reforming of hydrocarbon fuels has been observed in several studies [5, 10, 15, 16, 27]. These mainly concerned the partial oxidation of methane-air mixturesFile Size: KB.

Oxidation and reduction reactions are essential to life. Oxidation of nutrients provides plants and animals with the energy they need to survive. When an organism dies, oxidation reactions are responsible for the decay of the organic ion reactions are also used by chemists to synthesize pharmaceuticals, textiles, dyes, paints and a multitude of other important products.

Figure 2. (a) CO oxidation rate as a function of CO molar fraction and (b) HC oxidation rate as a function of HC molar fraction for 10% O 2 and temperature °C.

Two asymptotes are shown with dashed lines. The approximation of asymptotes has been used in the past for calculation of non-linear kinetics in modeling of Flow-Through Monoliths [13,1].

What Happens During An Oxidation Reaction. Even burning of fuel is a process of oxidation but it is called rapid oxidation as the chemical reaction is happening instantly. Oxidation is a problem actually and it causes nearly 50% losses in the food and beverage industry.

It reduces the quality of food items and also decreases their shelf life. Soot formation during partial oxidation is a major issue for hydrogen production from liquid hydrocarbon fuels.

Measurements were made to investigate the sooting behavior of diesel fuel under variation of the main operating parameters temperature (T = to °C), pressure (p = 1 to 3 bar), equivalence ratio (Φ =1 to 3), and steam ratio (H 2 O/C = to ) at constant residence time.1D Modeling and Simulations of Soot Oxidation in Diesel Particulate Filters and Monoliths using GT-POWER MASTER’S THESIS IN INNOVATIVE AND SUSTAINABLE CHEMICAL ENGINEERING CHANIN LERDMALEEWONG & STAFFAN LUONG Department of Applied MechanicsAuthor: Chanin Lerdmaleewong, Staffan Luong.Address: P.O.

Box Batavia, IL Phone: Fax: Email: [email protected]