Top PDF CONSIDERATIONS FOR THE DEVELOPMENT OF A DEVICE FOR THE DECOMMISSIONING OF THE HORIZONTAL FUEL CHANNELS IN THE CANDU 6 NUCLEAR REACTOR PART 2 - FUEL CHANNEL PRESENTATION

CONSIDERATIONS FOR THE DEVELOPMENT OF A DEVICE FOR THE DECOMMISSIONING OF THE HORIZONTAL FUEL CHANNELS IN THE CANDU 6 NUCLEAR REACTOR PART 2 - FUEL CHANNEL PRESENTATION

CONSIDERATIONS FOR THE DEVELOPMENT OF A DEVICE FOR THE DECOMMISSIONING OF THE HORIZONTAL FUEL CHANNELS IN THE CANDU 6 NUCLEAR REACTOR PART 2 - FUEL CHANNEL PRESENTATION

Abstract: As many nuclear power plants are reaching their end of lifecycle, the decommissioning of these installations has become one of the 21 st century’s great challenges. Each project may be managed differently, depending on the country, development policies, financial considerations, and the availability of qualified engineers or specialized companies to handle such projects. The principle objective of decommissioning is to place a facility into such a condition that there is no unacceptable risk from the decommissioned facility to public health and safety of the environment. In order to ensure that at the end of its life the risk from a facility is within acceptable bounds, action is normally required. The overall decommissioning strategy is to deliver a timely, cost- effective program while maintaining high standards of safety, security and environmental protection. If facilities were not decommissioned, they could degrade and potentially present an environmental radiological hazard in the future. Simply abandoning or leaving a facility after ceasing operations is not considered to be an acceptable alternative to decommissioning.The final aim of decommissioning is to recover the geographic site to its original condition.
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CONSIDERATIONS FOR THE DEVELOPMENT OF A DEVICE FOR THE DECOMMISSIONING OF THE HORIZONTAL FUEL CHANNELS IN THE CANDU 6 NUCLEAR REACTOR PART 4 - FUEL CHANNEL ASSEMBLY

CONSIDERATIONS FOR THE DEVELOPMENT OF A DEVICE FOR THE DECOMMISSIONING OF THE HORIZONTAL FUEL CHANNELS IN THE CANDU 6 NUCLEAR REACTOR PART 4 - FUEL CHANNEL ASSEMBLY

ABSTRACT: As many nuclear power plants are reaching their end of lifecycle, the decommissioning of these installations has become one of the 21 st century’s great challenges. Each project may be managed differently, depending on the country, development policies, financial considerations, and the availability of qualified engineers or specialized companies to handle such projects. The principle objective of decommissioning is to place a facility into such a condition that there is no unacceptable risk from the decommissioned facility to public health and safety of the environment. In order to ensure that at the end of its life the risk from a facility is within acceptable bounds, action is normally required. The overall decommissioning strategy is to deliver a timely, cost- effective program while maintaining high standards of safety, security and environmental protection. If facilities were not decommissioned, they could degrade and potentially present an environmental radiological hazard in the future. Simply abandoning or leaving a facility after ceasing operations is not considered to be an acceptable alternative to decommissioning. The final aim of decommissioning is to recover the geographic site to its original condition.
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CONSIDERATIONS FOR THE DEVELOPMENT OF A DEVICE FOR THE DECOMMISSIONING OF THE HORIZONTAL FUEL CHANNELS IN THE CANDU 6 NUCLEAR REACTOR PART 3 - FUEL CHANNEL REFERENCES

CONSIDERATIONS FOR THE DEVELOPMENT OF A DEVICE FOR THE DECOMMISSIONING OF THE HORIZONTAL FUEL CHANNELS IN THE CANDU 6 NUCLEAR REACTOR PART 3 - FUEL CHANNEL REFERENCES

The irradiation effects on zirconium and its alloys is reflected in macroscopic scale by altering their mechanical properties as a result of the action of fast neutrons and the material weakening due to the hydrogen absorption and its precipitation in the form of zirconium hydride. Following fast neutrons interaction (E> 1 MeV) with zirconium and its alloys are produced defects clusters and loops dislocations, whose size and mass distribution in the material depends on integrated neutron flux, irradiation temperature and material composition.
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Modeling of Two-Stage Solidification: Part II Computational Verification of the Model

Modeling of Two-Stage Solidification: Part II Computational Verification of the Model

Modeling of hypoeutectic alloys solidification is a complex problem, because increase of solid phase fraction is triggered by constitution of two structures: In the first stage, between eutectic and liquidus temperature, dendritic grains nucleate and grow. In the second stage, below eutectic temperature, eutectic structures form. In the latter stage eutectic grains nucleate and grow from the liquid phase that did not solidify in the first stage. As has been reported recently [1-8], various modes of eutectic transformation can be observed, depending on the alloy modifications. In unmodified alloys, eutectic grains nucleate in adjacency of dendritic grains. Whereas, in modified alloys (e.g. by adding strontium modifier) eutectic grains nucleate with no relation to dendritic structure, and the number of eutectic grains is smaller compared to the unmodified alloys.
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Prostate Cancer: A State of The Heart

Prostate Cancer: A State of The Heart

Surgical castration, oestrogens, LHRH agonists and GnRH antagonists, anti-androgens, combined androgen blockade (CAB), and 17,20-lyase inhibitors are some of the treatment options available to a patient with CV risk factors and known metastatic disease. Due to the high rate of thromboembolic events with oral oestrogen, it has somewhat been abandoned as a therapy. The oestrogen patch, however, is not thought to induce thromboembolic events. Prof Klotz described a study comparing a LHRH agonist and a transdermal oestrogen patch in which the use of the patch did not increase the number of CV events versus the LHRH agonist, suggesting that this may be regarded as a potential therapeutic option. 3 LHRH agonists have
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Evaluation of susceptibility of the ZRE1 alloy to hot cracking in conditions of forced strain

Evaluation of susceptibility of the ZRE1 alloy to hot cracking in conditions of forced strain

This work in combination with industrial tests of casting welding show that the causes of high-temperature brittleness are the partial tears of the structure and the hot cracks of both the castings and the welded and padded joints. Such phenomena should be treated as irreversible failures caused by the process of crystallisation that is in the area of co-existence of the solid and liquid structural constituent. The assessment of the resistance to hot fractures was conducted on the basis of the transvarestriant trial. The transvarestriant trial consists in changing of strain during welding It was stated that the range of the high-temperature brittleness is very broad, which significantly limits the application of the welding techniques to join or mend the elements made of alloy ZRE-1. The brittleness is caused mainly by metallurgical factors, i.e., precipitation of inter-metal phases from the solid solution.
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Contribution To The Study Of Reproduction Parameters Of The European Conger Eel Conger Conger Linnaeus 1758 From The Western Algerian Coasts Oran Bay Algeria

Contribution To The Study Of Reproduction Parameters Of The European Conger Eel Conger Conger Linnaeus 1758 From The Western Algerian Coasts Oran Bay Algeria

Abstract: The demographic structure of the population of the European conger eel (Conger conger; Linnaeus, 1758) from the Western coast of Algeria is made up of young individuals who enlarge more quickly than they grow. The estimated parameters of growth using the equation of Von Bertalanffy are: For females: L∞ = 134 mm ; K= 0,13 ; to = -0,69. For males: L∞ = 108 mm ; K= 0,23 ; to = -0,67 The specimens with most advanced stage of maturation appeared from February to April 2012 for both, female and male. The size at the first sexual maturity was 78 mm in males and 88 mm in females. The sex-ratio was in favor of the females lasting almost all the year excepting during September, December (2011), and January 2012 for males.
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Managament quality of tools in the planned housing casting

Managament quality of tools in the planned housing casting

Subbotko, Methods of distribution of tool at units based on TM software of Guhring, Production Engineering Wroc ł aw University of Technology,(2006) 273- 280 (in Polish).. Bocheński, C[r]

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Utopia University: A Faculty Member Reflects on Recommendations for the Future of SoTL

Utopia University: A Faculty Member Reflects on Recommendations for the Future of SoTL

Teaching cent ers can also be int egral in changing t he cam pus clim at e concerning t he scholarship of t eaching and learning. Working wit h facult y in t heir first year is one of t he fast est ways t o change t he accept ance of and expect at ion for SoTL. Hav e facult y w ho r egularly publish in t he ar ea of t eaching and learning shar e t hese exper iences w it h new facult y ( Richlin & Cox, 2004) . I n m y exper ience as a direct or, new er facult y are m ore likely t o have com e from graduat e progr am s w hich include t raining in pedagogy ; t herefore, t hey t end t o be m ore int er est ed in acquir ing new t eaching skills. I t is harder t o convince seasoned facult y t hat exam ining t eaching and learning issues is w ort hw hile, because m any do not believe t hey hav e som et hing new t o learn. Yet ev en t hose w ho have been in t he classroom for a long t im e can benefit from dialogue w it h facult y in t heir fir st fiv e years of t eaching. New facult y ar e oft en m ore educat ed in innovat ive pedagogical st rat egies, m ore current in t echnology , and m ore fam iliar wit h a syst em at ic approach t o exam ining t heir course st r engt hs and weaknesses because of t heir recent experiences wit h pedagogical inst ruct ion. One way t o encour age novice facult y and t heir experienced count er par t s t o t alk about t eaching is t o set up m ent or ing pairs ( McGr at h, 2012; Richlin & Cox , 2004; Tr ask, Mar ot z- Baden, Set t les, Gent r y, & Ber ke, 2009) . Experienced facult y share t heir k now ledge of inst it ut ional hist ory as w ell as t heir t hought s about t eaching, and newer facult y ask t heir quest ions and share w hat t eaching t echniques t hey hav e lear ned.
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The role of business intelligence in decision process modeling

The role of business intelligence in decision process modeling

Data mining is the research and analysis of large amounts of data with the aim to reveal signii cant patterns and rules. In order to increase productivity of modern companies, the goal is to improve the or- ganization's functions through better understanding of customers. More information on customer value management can be seen in (Verhoef et al., 2007). Data mining techniques and tools have various i elds of application – law, astronomy, medicine, industry, etc. Not even one data mining algorithm has been i rstly introduced for commercial purposes. More information on data mining strategy can be found in (Hornick et al., 2007). h e selection of certain com- bination of techniques that will be used in certain situation depends on the nature of research, avail- able data and skills and customer preferences. More information on data can be seen in (Verhoef et al., 2010). Data mining can be direct and indirect. Direct data mining explains or categorizes certain i elds, like i nancial income, whereas indirect data mining tries to i nd the patterns or similarities between target groups of data with no use of certain i eld or collection or predei ned classes.
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Assessment Of Some Acceleration Schemes In The Solution Of Systems Of Linear Equations.

Assessment Of Some Acceleration Schemes In The Solution Of Systems Of Linear Equations.

Abstract: In this paper, assessment of acceleration schemes in the solution of systems of linear equations has been studied. The iterative methods: Jacobi, Gauss-Seidel and SOR methods were incorporated into the acceleration scheme (Chebyshev extrapolation, Residual smoothing, Accelerated gradient and Richardson Extrapolation) to speed up their convergence. The Conjugate gradient methods of GMRES, BICGSTAB and QMR were also assessed. The research focused on Banded systems, Tridiagonal systems and Dense Symmetric positive definite systems of linear equations for numerical experiments. The experiments were based on the following performance criteria: convergence, number of iterations, speed of convergence and relative residual of each method. Matlab version 7.0.1 was used for the computation of the resulting algorithms. Assessment of the numerical results showed that the accelerated schemes improved the performance of Jacobi, Gauss-Seidel and SOR methods. The Chebyshev and Richardson acceleration methods converged faster than the conjugate gradient methods of GMRES, MINRES, QMR and BICGSTAB in general.
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Investigating The Use Of Mobile Computing In Zimbabwe Polytechnics Case Of A Polytechnic In Zimbabwe

Investigating The Use Of Mobile Computing In Zimbabwe Polytechnics Case Of A Polytechnic In Zimbabwe

). This shows that there has been upgrading and improvement in mobile computing device characteristics since Zimm erman’s research up to now. Dahlstrom (2012), a senior research analyst at EDUCAUSE, in his article titled ―Executive Summary: Student Mobile Computing Practices—lessons learned from Qatar‖ says that students find Mobile technology convenient and engaging and institutions need to invest more in mobile device use and support. In Qatar the Education City conducted a survey jointly with ECAR (Every Child a Reader) of United Kingdom (UK) on student mobile computing technology and the results were not only relevant to their student’s experiences but also speaks to the global revolution of mobile technology in the academic environment. The findings revealed that, for students, technology plays an important role in productivity and communication, students want technology integrated into their academic experience and students want to better utilise mobile technology in their learning environments doing such things as creating content for course assignments, accessing course related material and pushing the limits of mobile device productivity. Kim et al (2006) identified the benefits of using mobile wireless phones as freedom of location and time, increasing speed in teaching and learning, enabling one-to-one learning based on individual educational histories or test results, better communication opportunities and better collaboration in group discussions. They also identified the specific benefits of using Personal Data Assistants in m-learning as mobility, information management capacity, beaming capability, ability to work in many places and replacement of pen and paper. A UK essays website argued that the major challenge for educators and trainers is how to develop learning materials for delivery on
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An Advancement To The Security Level Through Galois Field In The Existing Password Based Technique Of Hiding Classified Information In Images

An Advancement To The Security Level Through Galois Field In The Existing Password Based Technique Of Hiding Classified Information In Images

Such mediums are the best cover media to hide messages. Digital images are the most widespread cover files used for SG, due to their high embedding efficiency and the insensitivity of the human visual system (HVS) [3]. It is not necessary that the cover and message have a homogeneous structure. For example, it is possible to embed a recording of an audio stream message inside a digital image [4]. The simplest steganographic techniques embed the bits of the message directly into the least significant bit (LSB) plane of the cover image in a deterministic sequence [5, 6]. Different steganographic techniques focus on a variety of requirements such as robustness, tamper resistance, imperceptibility, security and capacity [7-10]. Our technique is focused on providing high security and high speed operation while maintaining imperceptibility. We are using here Galois Encoder to provide high operational speed while maintaining the security intensively. The 2BC (two bit code) technique is the basic steganography technique we are using with the Galois Operation. Galois field arithmetic has received considerable attention in recent years due to their application in public-key cryptography schemes and error correcting codes.[12] We are here using the 2BC(two bit code) and Galois Field algorithm to achieve the goal of the maximum reception of the original message signal while maintaining the losses and enhancing the speed of operation. Different steganographic techniques focus on a variety of requirements such as robustness, tamper resistance, imperceptibility, security and capacity. Our embedding technique is focused on providing security while maintaining imperceptibility. Our method can work in any transform domain, but we are illustrating the ideas in the spatial domain for convenience. The rest of the paper is divided among the following sections: section 2 explains the existing passcode based technique which involves the matching process and the embedding techniques, section 3 describes the Galois operation, section 4 and 5 explains the data transmission and retrieval process using the Galois Encoder and decoder, section 6 contains simulation result and section 7 summarizes the Conclusion.
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The Effects of Gender Segregation at the Occupation, Industry, Establishment, and Job-Cell Levels on the Male-Female Wage Gap

The Effects of Gender Segregation at the Occupation, Industry, Establishment, and Job-Cell Levels on the Male-Female Wage Gap

The main lessons learned from these theories are that, while part of the wage gap is attributable to human capital differences between the genders, the process of allocation of males and females in the labor market leads to a type of sorting in which women end up relatively more concentrated in occupations, industries, firms, and occupations within establishments (job cells) that pay lower wages. This implies that empirical analyses of the determinants of the sex pay gap should take into account not only the human capital differences between the genders but also the patterns of female segregation along these dimensions. Another implication of these theories for empirical work is that unobserved (to the analyst) characteristics of workers and firms play crucial roles as determinants of wages and the sorting process of males and females in the labor market. Lack of control for unmeasured traits of workers and firms may thus generate serious biases in the estimates of the effects of gender segregation on the wages of males and females, and therefore on the gender wage gap.
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Winning the Oil Lottery: The Impact of Natural Resource Extraction on Growth Tiago Cavalcanti Daniel Da Mata Frederik Toscani

Winning the Oil Lottery: The Impact of Natural Resource Extraction on Growth Tiago Cavalcanti Daniel Da Mata Frederik Toscani

It is worth pointing out that the whole of Brazil went through a process of moving towards a higher share of services, a lower share of agriculture, more urbanization, and less informality. In our sample of municipalities in which drilling occurred, the share of services workers stood slightly below 0.1 in 1940 and had risen to over 0.3 in 2000, for example. Discovering oil accentuated this trend in a quantitatively important manner. The increase in the share of services workers we estimated translates to roughly half a standard deviation of the distribution in the sample in 2000. Similarly, the estimated 37 percent increase in the size of services firms corresponds to a quarter of the standard deviation of the distribution in 2000. The mean size was 9 workers, implying on average 3-4 additional workers per firm due to oil discoveries. Skilled wages are estimated to be about 20 percent higher in discovery MCAs. This corresponds to 150 Real per month, or one national minimum wage in 2000. In terms of low skilled wages we did not find any effect. Looking at the distribution we find that the average low skilled formal services sector wage in 2000 in our sample was above the national minimum wage. Given the very low income an informal subsistence farmer could expect, the opportunity to work at or above the legal minimum wage was a sufficient incentive to move to the urban agglomeration and enter the formal workforce.
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The Influence Of CSR Awareness On Consumer Purchase Decision Of A Telecommunication Network In Ghana A Case Of La Nkwantanag Madina Municipality

The Influence Of CSR Awareness On Consumer Purchase Decision Of A Telecommunication Network In Ghana A Case Of La Nkwantanag Madina Municipality

on overall company evaluations‖. Murray and Vogel (1997) have investigated the effect of associated CSR practices on consumers and presented similar findings. The CSR activities mentioned in the research are, for instance, environmental protection practices (energy conservation), engagement in acts to promote human welfare, corporate social marketing (electric safety education for schoolchildren), contribution to the economic development of the region, and consumer protection program. Their research found that CSR programs lead to improved customer attitudes towards the firm, including beliefs about the company‘s honesty, consumer responses, and increased support for the firm in labor or government disputes. Mohr et al. (2001) conducted a consumer interview project for investigating the impact of firms‘ CSR on consumer behavior. How well are consumers aware of the CSR level of individual firms? Are the purchase decisions of consumers affected by a firm‘s CSR, and how much? How do consumers think about firms‘ motivation for being socially responsible? Mohr et al. (2001) found that consumers are positive to business in general. It is not wrong to pursue economic interests. Consumers expect firms to be socially responsible. The attitudes of consumers toward socially responsible firms are more positive than toward irresponsible firms. Consumers are aware that socially responsible firms are helping themselves by practicing CSR. But this perception of consumers does not harm the positive consumer evaluations toward socially responsible firms. The study of Mohr et al. (2001) is enlightening for researchers, managers and policy makers. For managers specifically, it is clear that consumers do care about a firm‘s CSR and act accordingly. Some consumers are highly ethical in
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Evaluating the influence of selected parameters on sensitivity of a numerical model of solidification

Evaluating the influence of selected parameters on sensitivity of a numerical model of solidification

The presented results from a series of analyses indicate lack of dependence of certain sensitivity analysis parameters. In case of increasing the parameter r (the number the matrix B* is generated) obtaining identical results despite increasing r, may be explained as converging of the results to a certain fixed value. It should be noticed that increase of the number r causes increase of the number of required computer simulations. Therefore it is significant to obtain credible results for the smallest r number possible.
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The analysis of solidification process of ferritic-austenitic cast steel

The analysis of solidification process of ferritic-austenitic cast steel

One of the most common defects leading to the rejection of faulty castings made of duplex cast steel is hot cracking. Hot cracking – differently from cold cracking which occur on cooling, when the material exhibits already distinct elastic properties – proceeds in the semi-solid state, particularly when the temperature of solidifying casting is close to the equilibrium solidus point. There exist a range of temperatures in the vicinity of the solidus point within which the solidifying metal shows very small deformation ability and small strength. Therefore even little stresses occurring at the solidification stage and caused by density difference between ferrite and austenite, or restricted shrinkage, or various temperature gradients, can be the reason of hot cracking. Copper addition, as it is used in cast steel grades implemented in Polish power industry applications, decreases the temperature of the end of solidification, thus affecting beneficially the surface reproduction quality, but on the other hand it can promote, along with several other elements contained in duplex cast steel, the peritectic transformation during the last stage of solidification. The presence of peritectic solidification, i.e. strictly speaking the structural stresses accompanying that process, is the well-known and significant reason of the increased steel defectiveness in the continuous steel casting (CSC) technology if the steel with carbon content promoting the peritectic transformation is processed.
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Effect of Annealing Time for Quenching CuAl7Fe5Ni5W2Si2 Bronze on the Microstructure and Mechanical Properties

Effect of Annealing Time for Quenching CuAl7Fe5Ni5W2Si2 Bronze on the Microstructure and Mechanical Properties

At this scale of temperature and time (Fig. 9) it is difficult to identify the characteristic changes of the sample temperature, respectively, during the annealing (stage T2 - isothermal annealing), hyperquenching and quenching bronze (stage T3 - cooling in ambient air and T4 stage - cooling in 10% NaCl solution in water). Figure 10 shows representative characteristics of temperature changes during the isothermal annealing bronze sample at a constant temperature of t=1000 °C for 3600 s. There was a decrease of the temperature characteristic bronze samples during the annealing process in the studied range of isothermal annealing time (30, 60 and 120 min.). The presented characteristics t=f(τ) for a sample of bronze in the furnace that, after heating the furnace and the sample to a temperature of 1000 °C, there was a gradual decrease in temperature of the sample to about 996°C. Decrease of the temperature of the sample is associated with absorption of heat by the phase existing in bronze at 1000 °C, necessary for the occurrence of the following diffusion processes:
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