Yamani H.A.,King Abdullah City for Atomic and Renewable Energy |
Mouayn Z.,University of Coimbra
Journal of Physics A: Mathematical and Theoretical | Year: 2014
A positive semi-definite Hamiltonian H that has a tridiagonal matrix representation in a basis set, allows a definition of forward- and backward-shift operators that can be used to define the matrix representation of its supersymmetric partner Hamiltonian H( + )with respect to the same basis. We find explicit relationships connecting the matrix elements of both Hamiltonians. We present a method to obtain the orthogonal polynomials in the eigenstate expansion problem attached to H( + )starting from those polynomials arising in the same problem for H. This connection is established by using the notion of kernel polynomials. We apply the obtained results to two known solvable models with different kinds of spectrum. © 2014 IOP Publishing Ltd.
News Article | January 25, 2016
EDF plans two new nuclear reactors in France by 2030 (Reuters) France’s EDF plans to build two new nuclear reactors by 2030 in a bid to start renewing its existing fleet of 58 ageing reactors, the state-controlled utility said in a document released to its unions.. The two new French reactors are part of a plan bring up to 10 European Pressurized Reactors (EPR) designed by French nuclear technology company Areva on line by 2030, EDF said. The two French EPRs would be “New Model” EPRs with improved designs, and would be financed 51% by EDF, the firm said. EDF chief executive Jean-Bernard Levy said late last year that the updated design for Areva’s EPR reactor, the EPR New Model, should be ready by around 2020. He expects France will eventually build some 30 EPR reactors to replace its current fleet, he added. He also said the company may need partners to finance the future replacement of its French nuclear fleet as EDF’s finances may not allow it to build a new fleet entirely on its own, as it did with the current fleet in the 1970s and 1980s. (WNA) An MOU for cooperation in building the high-temperature gas-cooled reactor (HTGR) was signed by King Abdullah City for Atomic and Renewable Energy (KA-CARE) president Hashim bin Abdullah Yamani and China Nuclear Engineering Corporation (CNEC) chairman Wang Shu Jin. No details of the size of the plant or the project timeline were disclosed. A demonstration HTR-PM unit under construction at Shidaowan near Weihai city in China’s Shandong province. That plant will initially comprise twin HTR-PM reactor modules driving a single 210 MWe steam turbine. Construction started in late 2012 and it is scheduled to start commercial operation in late 2017. A proposal to construct two 600 MWe HTRs at Ruijin city in China’s Jiangxi province passed a preliminary feasibility review in early 2015. The design of the Ruijin HTRs is based on the smaller Shidaowan demonstration HTR-PM. Construction of the Ruijin reactors is expected to start next year, with grid connection in 2021. CNEC said it is actively promoting its HTR technology overseas and has already signed MOUs with Saudi Arabia, Dubai, South Africa “and other countries and regions” to consider the construction of HTGR plants. Like all such agreements in principle, they only become realized when followed by construction contracts. Often years of negotiations take place before that happens. First South Korean APR-1400 connected to the grid (NucNet) Shin Kori 3 – the first Korean-designed APR-1400 unit to start up – has begun supplying electricity to the grid, Korea Hydro and Nuclear Power announced. Construction of the unit began in October 2008 and it achieved first criticality at the end of December. It is expected to enter commercial operation in May following the completion of commissioning tests. UK Could Have First SMR In Operation By 2025, Says NuScale (NucNet) The UK’s ambitions to build small modular reactors may be realized as soon as 2025, according to Fluor Corporation’s NuScale unit, which is seeking to be a pioneer in the market. The Bloomberg wire service said NuScale plans seek the UK generic design assessment (GDA), in 2017, Tom Mundy, executive vice president for program development at the US company, was reported as saying. “Assuming the GDA is submitted and takes four years, we’d be looking at approval in 2021,” Mr Mundy said. “There’s then a 36-month construction time, so it’s plausible to expect that if all things line up, we could have a UK plant built by 2025.” (WNA) Hitachi announced the incorporation of a new UK company – Hitachi Nuclear Energy Europe – as part of its strategy to enhance its UK presence for the engineering, procurement and construction of Horizon Nuclear Power’s new nuclear power plant development at Wylfa Newydd. Horizon Nuclear Power, a 100% subsidiary of Hitachi Ltd, plans to deploy the UK Advanced Boiling Water Reactor (ABWR) at two sites – Wylfa Newydd, which is on the Isle of Anglesey, and Oldbury-on-Severn, in South Gloucestershire. (Yomiuri Shimbun – Japan) The Monju fast breeder reactor must be put under the control of “an organization that can regain public trust that has now been lost in its operation and management,” writes The Yomiuri Shimbun editorial board. Nuclear Regulation Authority-conducted inspections of the reactor over the last four years have unveiled a number of regulatory violations. The editorial board writes that “an organization capable of properly carrying out required inspections is an essential condition for managing a nuclear power plant.” (N. Eng Intl) China National Nuclear Corporation (CNNC) said on 18 January that its specialists have 3D printed a lower tube socket for the fuel assembly of the CAP1400 pressurised water reactor (an enlarged version of the Westinghouse AP1000), marking the first use of 3D printing to construct nuclear fuel elements in China. (NucNet) State-owned CNNC said the assemblies in a nuclear reactor are cell structures that consist of cylindrical fuel rods and complex metal parts that keep the rods in place. The various parts require high-precision manufacturing, something that has traditionally made it an expensive task. However, CNNC has now found these parts can be mass produced using 3D-molding tools based on 3D printing – greatly shortening the product development cycle, improving productivity and significantly reducing costs. CNNC said the use of 3D-printed parts is in the pre-acceptance phase and the parts will undergo extensive testing. If successful, the company will use 3D-manufacturing techniques to produce other parts that have a complicated shape. Unclear costs may lead to more delays for Polish nuclear reactor (Reuters) Poland’s conservative government may further postpone the construction of the country’s first nuclear reactor as costs remain unpredictable, Energy Minister Krzysztof Tchorzewski said. The project was first pushed in 2009 by Poland’s previous government as part of a drive to find alternatives to coal-fired power generation. The project’s official deadlines were to have the first unit operating by 2025, a delay from the original target of 2020. The minister added that the cost to build a 6-gigawatt nuclear power plant ranged from 30 billion to 50 billion zlotys ($7.3 billion to $12.2 billion) and could rise further during construction. Duke expects COL from NRC for Lee Plant this year (Charlotte Observer) Duke expects to learn this year whether the Nuclear Regulatory Commission will allow it to build a nuclear plant. Duke has the William States Lee III site in Cherokee County, S.C., but has repeatedly moved the plant’s expected operating date as it decides whether to go forward. Duke CEO Lynn Good told a high profile business group this week that the EPA’s Clean Power Plan will force more of the utility’s coal fired plants to close. She said it is time for the nation to consider the role of new nuclear power plants. She also said the decision to move forward “is difficult,” and that it is “an expense, long-rang proposition.” She gave no date for start of construction. One of the financial issues the plant faces is that North Carolina, which is in the plant’s service area, may not support a plan to bill rate payers for construction costs as they are taking place.
Baras A.,King Abdullah City for Atomic and Renewable Energy |
Bamhair W.,King Abdullah City for Atomic and Renewable Energy |
Alkhoshi Y.,King Abdullah City for Atomic and Renewable Energy |
Alodan M.,King Abdullah City for Atomic and Renewable Energy |
World Renewable Energy Forum, WREF 2012, Including World Renewable Energy Congress XII and Colorado Renewable Energy Society (CRES) Annual Conferen | Year: 2012
Saudi Arabia has one of the highest direct normal irradiation (DNI) resources in the world. Saudi Arabia is planning for significant deployment for both photovoltaic (PV) and concentrated solar power (CSP) in order to harvest this high DNI and produce energy from a renewable, clean and sustainable source. This will help conserve hydrocarbon resources that are currently being consumed in significant quantities to generate electricity and desalinate seawater in the country. However, high DNI combined with extreme summertime ambient temperatures represent a major technical challenge for the PV systems since the efficiency of these systems decreases when operating at high temperatures. This necessitates the development of cooling mechanisms suitable for the environment in the region. On the other hand, this high DNI is more favorable for the CSP systems, but high dust loadings may have a greater impact on reflectors. CSP in Saudi Arabia is being considered for both electricity generation as well as direct thermal applications in industrial processes such as water desalination. This paper will highlight the challenges and opportunities of solar energy in Saudi Arabia, including overheating and potential cooling mechanisms as well as solar thermal process heat and desalination opportunities. Copyright © (2012) by American Solar Energy Society.
Zell E.,Battelle |
Gasim S.,King Abdullah City for Atomic and Renewable Energy |
Wilcox S.,Solar Resource Solutions LLC |
Katamoura S.,King Abdullah City for Atomic and Renewable Energy |
And 4 more authors.
Solar Energy | Year: 2015
Solar radiation resource data are the foundation of information for programs of large-scale deployment of solar energy technologies. While the solar resource in Saudi Arabia and the Arabian Peninsula was believed to be significant based on limited past data, understanding the spatial and temporal variability requires significantly more data and analysis in order to optimize planning and siting solar energy power plants. This paper summarizes the analysis of the first year of broadband solar resource measurements from a new monitoring network in Saudi Arabia developed by the King Abdullah City for Atomic and Renewable Energy (K.A.CARE). The analysis used twelve months (October 2013-September 2014) of data from 30 stations distributed across the country based on one-minute measurements of Global Horizontal Irradiance (GHI), Diffuse Horizontal Irradiance (DHI), Direct Normal Irradiance (DNI), and related meteorological parameters. Network design, implementation, and data quality assurance are described to document the network extent and quality. For the 30 stations, the annual average daily GHI ranged from about 5700Wh/m2 to 6700Wh/m2 with consistently higher values inland and lower values along the coasts. This indicates that photovoltaic technologies would perform well at any location although extreme high temperatures (over 30°C annual average in some locations) may degrade the performance of some types of photovoltaic technologies. Annual average daily DNI was much more variable across the stations, ranging from about 4400Wh/m2 to over 7300Wh/m2 with the highest values and clearest skies in the northwest part of the country. While most regions have sufficient solar resources for concentrating solar technologies, the western inland sites with average daily totals of over 6474Wh/m2 (average yearly totals of 2400kWh/m2/year) are superior to the eastern sites with average daily totals closer to 5510Wh/m2 (average yearly totals of 2000kWh/m2/year). This first year of data represents the beginning of a deeper understanding of solar resource characteristics in Saudi Arabia and the Middle East. Although continued measurements are needed to understand the interannual resource variability, the current study should have significant applications for preliminary technology selection, power plant modeling, and resource forecasting. © 2015 The Authors.
Alodan M.,King Abdullah City for Atomic and Renewable Energy |
Parmar K.,Alfaisal University |
Alhoshan M.,King Saud University |
Alzaben A.,King Abdullah City for Atomic and Renewable Energy
2010 IEEE International Energy Conference and Exhibition, EnergyCon 2010 | Year: 2010
There is considerable recent interest in forming nano-materials with enhanced or unique properties and there has already been a great deal of interest in applying nanotechnology to improve fuel cell performance. Researchers have shown that the power output of fuel cells can be enhanced by using carbon nanotubes as catalyst supports. This paper aims to combine the advantages high resolution lithography to achieve high structure resolution over a large surface area for fuel cell electrodes. Technique to develop a high surface area electrode is to use anodization of selected metals to produce oxide nanotubes as a template. Titanium has been used as a substrate to grow Ti-oxide nanotubes in 0.5 wt% HF electrolytes, resulting in a well ordered structure to control the flow of reactant to the membrane. We used nanolithography techniques to assist and control the growth of the oxide tubes. TiO2 nanotubes of diameter 6075 nm and length of 220250nm were formed. Finally we incorporated the optimized catalyst/electrode design into a prototype fuel cell using a commercial Nafion membrane and evaluated its performance. Prototype miniature fuel cell showed maximum current density approximately as high as 130mA/cm 2 and open circuit voltage of 0.75V. © 2010 IEEE.
Kinsara A.A.,King Abdulaziz University |
Shabana E.-S.I.,King Abdulaziz University |
Abulfaraj W.H.,King Abdullah City for Atomic and Renewable Energy |
Qutub M.M.T.,King Abdulaziz University
Health Physics | Year: 2015
Radon-222 has been measured in groundwater, dwellings, and atmosphere of an inhabited area adjacent to the granitic Aja heights of Hail province, Saudi Arabia. The measurements were carried out in the field using a RAD7 instrument. Twentyeight water samples, collected from drilled wells scattered in the region, were analyzed. Radon-222 concentration ranged from 2.5-95 kBq m-3 with an average value of about 30.3 kBq m-3. The higher values were found in wells drawing water from granitic aquifers. Indoor 222Rn was measured in 20 dwellings of rural areas in Hail city and other towns. Concentrations ranged from 12-125.6 Bq m-3, with an average value of 54.6 Bq m-3. Outdoor air 222Rn was measured at 16 sites, with values ranging from 6.2-13.3 Bq m-3, with an average value of 10.5 Bq m-3. The estimated average effective dose due to inhalation of 222Rn released from water was 0.08 mSv y-1. The estimated average annual effective dose due to indoor 222Rn was 1.35 mSv, which lies below the effective dose range (3-10 mSv) given as the recommended action level. Based on the average dose rate values, the excess lifetime cancer risk values were estimated as 69.8 × 10-4 due to indoor radon and 13.4 × 10-4 due to outdoor radon. © 2014 Health Physics Society.
Yamani H.A.,King Abdullah City for Atomic and Renewable Energy
European Journal of Physics | Year: 2013
We show that, in the context of the R-matrix method, the eigenvalues of the Hamiltonian matrix in a finite basis spanning the inner configuration space can be used to generate a set of accurate values of the S-matrix at these eigenenergies. This set is then used as input in an analytic continuation scheme to locate several resonances accurately in the complex energy plane. © 2013 IOP Publishing Ltd.
Al-Othmany D.,King Abdulaziz University |
Shehata A.H.,King Abdullah City for Atomic and Renewable Energy |
Hussain A.,King Abdulaziz University
Life Science Journal | Year: 2013
Gamma rays transmission densitometry scanning of distillation columns is used to inspect non-invasively the internal structure and components distribution in columns. The transmission gamma counting patterns are thereafter interpreted into a diagnosis of possible malfunctions, breakdowns, or even anomalies of the column's performance. This research is aimed to develop a computerized expert system to assist in interpretation and diagnosis. The developed system incorporates several modules, namely, Patterns Recognition Kernel, Updateable Patterns/Statuses Database, Graphical User Interface (GUI), and an Application Mode Module (User) to process input gamma scanner measurement patterns for diagnosis. The system can diagnose the statuses of single as well as multiple stages of the distillation column being inspected, and provide justification and confidence level indicators. A generic distillation column design was modeled and the gamma scanner counting patterns were simulated using the Monte Carlo radiation transport code MCNP. Monte Carlo simulated column scanner measurements were generated for a total of six virtual stage statuses testing and evaluation of the developed diagnosis system showed good levels of reliability, accuracy, flexibility, and a reasonably short processing time. Moreover, this system can be applied for other distillation column designs and fault analysis.