San Martín, Argentina
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Pedrosa J.M.,CNEA | Wisniacki D.,FCEyN | Carlo G.G.,CNEA | Novaes M.,Federal University of São Carlos
Physical Review E - Statistical, Nonlinear, and Soft Matter Physics | Year: 2012

We investigate the properties of the semiclassical short periodic orbit approach for the study of open quantum maps that was recently introduced. We provide solid numerical evidence, for the paradigmatic systems of the open baker and cat maps, that by using this approach the dimensionality of the eigenvalue problem is reduced according to the fractal Weyl law. The method also reproduces the projectors ψnR ψnL , which involves the right and left states associated with a given eigenvalue and is supported on the classical phase-space repeller. © 2012 American Physical Society.


News Article | November 7, 2016
Site: www.marketwired.com

VANCOUVER, BRITISH COLUMBIA--(Marketwired - Nov. 7, 2016) - Blue Sky Uranium Corp. (TSX VENTURE:BSK)(FRANKFURT:MAL)(WKN:A0MKXP), "Blue Sky" or the "Company") is pleased to report that it has expanded the aggressive planned exploration program at its 100% owned Amarillo Grande Uranium Project ("the Project") in Rio Negro Province, Argentina. The program is the next phase in the Company's mission to advance the Project into a low-cost surficial uranium mining operation in order to be the first domestic supplier of uranium to the growing Argentine nuclear industry. The Amarillo Grande Project currently includes over 187,000 hectares of mineral rights along a 140-kilometre long trend of mineralization in a new uranium district. The Ivana, Anit and Santa Barbara properties, each a part of the Amarillo Grande Project, all host secondary near-surface uranium mineralization, open to expansion, and the potential for discovery of primary sandstone-hosted uranium mineralization at depth. This phase of work will include up to 10,000 metres of reverse circulation (RC) drilling, designed to identify and delineate mineral resources. "We believe that a domestic source of uranium with a low-cost production model has the opportunity to supply Argentina's growing nuclear industry at highly competitive pricing compared to imported material. Our Amarillo Grande project with its near-surface mineralization, access to infrastructure, and supportive federal and provincial policies, is an excellent candidate to fulfill that model, and we have expanded our exploration program in order to take advantage of the current opportunity window," stated Blue Sky President and CEO Nikolaos Cacos. In 2016, Argentina committed to "The Paris Accord" a Global Commitment to Clean Energy and set a goal of a 15% reduction in CO emissions by 2030i. This goal may be increased to 30%, depending on the availability of foreign investment. A shift from carbon-based fuels to nuclear power for energy requirements is a keystone of the plan moving forward. Argentina has a significant nuclear industry, with three power plants in operation, six research reactors, and a variety of supporting facilities and centres. However, in 2015, nuclear energy accounted for only about 4% of Argentina's energy matrix. Under the 15% CO reduction goal, the planned proportion of nuclear would more than double to 10% of the energy matrix in 2025ii. Currently there is one new power plant under construction, two additional ones in the planning stage and two more under proposal. However, there is no domestic source of uranium to supply the current or future nuclear power plantsiii. The first major stage in the exploration plan is to delineate mineralization across the district in greater detail and to identify extensions and new targets, both near surface and at depth. Since announcing the program in July, the Company has completed standardization of the project database, applied for updated work permits on all three properties, and had its expert technical consultants re-assess and refine the project's geologic model. Exploration permits have been received for the Anit property and a surface geophysical program is now underway which will help to refine targets for a 10,000 metre RC drilling program, scheduled to commence at the beginning of 2017. The drilling program will be designed to identify and delineate mineral resources and to provide material for a comprehensive metallurgical test work program. The Company's medium-term goal is to define sufficient mineral resources to support an economic assessment to evaluate exploitation of surficial uranium deposits in the Project area. This new uranium district was first identified, staked and underwent preliminary exploration by Blue Sky from 2007 to 2012 as part of the Grosso Group's strategy of adding alternative energy focus to its successful portfolio of metals exploration companies. The Ivana, Anit, Santa Barbara properties, which comprise the Amarillo Grande Project, are within 50 kilometres of each other along the trend, therefore if resources are delineated at each property a central processing facility is envisioned. The area is flat-lying, semi-arid and accessible year round, with nearby rail, power and port access. Mineralization identified to date represents a Surficial Uranium style of deposit, where carnotite mineralization coats loosely consolidated pebbles of sandstone and conglomerates. Carnotite is amenable to leaching, and early metallurgical work indicates that it will also be upgradeable using a very simple wet screening method. The near-surface mineralization, ability to locally upgrade, amenability to leaching and central processing possibility suggest a potentially low-cost development scenario for a future deposit. Rio Negro is host to several facilities related to the nuclear industry. Furthermore, the Provincial government is amenable to mining as a means of socio-economical development. In addition, the Federal government has expressed support for building domestic resources of uranium. In particular, the Argentina Atomic Energy National Commission (CNEA) published its Strategic Plan 2015-2025, which includes a strategic objective "To ensure the supply of domestic uranium for nuclear power plants in operation, under construction and planned."iv For additional details on the project and properties, please see the Company's website. The contents of this news release have been reviewed and approved by David Terry, Ph.D., P.Geo. Dr. Terry is a Director of the Company and a Qualified Person as defined in National Instrument 43-101. Blue Sky Uranium Corp. is a leader in uranium discovery in Argentina. The Company's objective is to deliver exceptional returns to shareholders by rapidly advancing a portfolio of surficial uranium deposits into low-cost producers. Blue Sky has the exclusive right to over 428,000 hectares of property in two provinces in Argentina. The Company's flagship Amarillo Grande Project was an in-house discovery of a new district that has the potential to be among the first domestic suppliers of uranium to the growing Argentine market. The Company is a member of the Grosso Group, a resource management group that has pioneered exploration in Argentina since 1993. ON BEHALF OF THE BOARD Neither TSX Venture Exchange nor its Regulation Services Provider (as that term is defined in policies of the TSX Venture Exchange) accepts responsibility for the adequacy or accuracy of this release. This news release may contain forward-looking statements. Forward-looking statements address future events and conditions and therefore involve inherent risks and uncertainties. Actual results may differ materially from those currently anticipated in such statements. Readers are encouraged to refer to the Company's public disclosure documents for a more detailed discussion of factors that may impact expected future results. The Company undertakes no obligation to publicly update or revise any forward-looking statements. The securities being offered have not been, nor will they be registered under the United States Securities Act of 1933, as amended, or state securities laws and may not be offered or sold within the United States or to, or for the account or benefit of, U.S. persons absent U.S. federal and state registration or an applicable exemption from the U.S. registration requirements. This release does not constitute an offer for sale of securities in the United States. ii Institute of the Americas 2016. Argentina's Energy Transition: The Macri Government's Vision. Accessed 03/11/16. https://www.iamericas.org/documents/energy/reports/Argentinas_Energy_Transition_2016.pdf.


News Article | February 16, 2017
Site: www.marketwired.com

VANCOUVER, BRITISH COLUMBIA--(Marketwired - Feb. 16, 2017) - Blue Sky Uranium Corp. (TSX VENTURE:BSK)(FRANKFURT:MAL2)(OTCQB:BKUCF), ("Blue Sky" or the "Company") is pleased to provide an update on the progress of the reverse circulation ("RC") drilling program at the Amarillo Grande uranium project, in Rio Negro Province, Argentina. To date, 46 holes have been completed at the Ivana area on targets defined by the previous geophysics program and older pit sampling. Holes range from three to 21 metres, averaging 13.6 metres in extent. The first batch of samples has been sent to the laboratory for analysis. In addition to the on-going exploration work, the field team has hosted the Mining Secretary of Rio Negro, Señor Juan Pablo Espínola, at site at the end of January. Sr. Espínola reported being pleased with both the working standards and the Company's relationships with landowners. Also in January, Dr. Jon Thorson, a well-respected geological consultant specializing in exploration for mineral deposits in sedimentary basins, conducted an on-site review of the Amarillo Grande project along with Company Technical Advisor, Jorge Berizzo. The review provided additional insight into controls to uranium mineralization at the project which will be incorporated into the current program. "We are pleased to have both government support and third party validation for our program at Amarillo Grande. The 3,000 metre program is continuing, and we are looking forward to our first batch of results in the upcoming weeks," stated Nikolaos Cacos, Blue Sky President & CEO. For additional details on the program please refer to the Company news release dated January 26, 2017. This new uranium district was first identified, staked and underwent preliminary exploration by Blue Sky from 2007 to 2012 as part of the Grosso Group's strategy of adding alternative energy focus to its successful portfolio of metals exploration companies. The close proximity of several major targets suggest that if resources are delineated a central processing facility would be envisioned. The area is flat-lying, semi-arid and accessible year round, with nearby rail, power and port access. Mineralization identified to date represents a Surficial Uranium style of deposit, where carnotite mineralization coats loosely consolidated pebbles of sandstone and conglomerates. Carnotite is amenable to leaching, and early metallurgical work indicates that the mineralized material can be upgraded using a very simple wet screening method. The near-surface mineralization, ability to locally upgrade, amenability to leaching and central processing possibility suggest a potentially low-cost development scenario for a future deposit. Rio Negro is host to several facilities related to the nuclear industry. Furthermore, the Provincial government is amenable to mining as a means of socio-economical development. In addition, the Federal government has expressed support for building domestic resources of uranium. In particular, the Argentina Atomic Energy National Commission (CNEA) published its Strategic Plan 2015-2025, which includes a strategic objective "To ensure the supply of domestic uranium for nuclear power plants in operation, under construction and planned." For additional details on the project and properties, please see the Company's website: www.blueskyuranium.com The contents of this news release have been reviewed and approved by David Terry, Ph.D., P.Geo. Dr. Terry is a Director of the Company and a Qualified Person as defined in National Instrument 43-101. Blue Sky Uranium Corp. is a leader in uranium discovery in Argentina. The Company's objective is to deliver exceptional returns to shareholders by rapidly advancing a portfolio of surficial uranium deposits into low-cost producers. Blue Sky holds has the exclusive right to over 428,000 hectares of property in two provinces in Argentina. The Company's flagship Amarillo Grande Project was an in-house discovery of a new district that has the potential to be among the first domestic suppliers of uranium to the growing Argentine market. The Company is a member of the Grosso Group, a resource management group that has pioneered exploration in Argentina since 1993. ON BEHALF OF THE BOARD Neither TSX Venture Exchange nor its Regulation Services Provider (as that term is defined in policies of the TSX Venture Exchange) accepts responsibility for the adequacy or accuracy of this release. This news release may contain forward-looking statements including but not limited to comments regarding the timing and content of upcoming work programs, geological interpretations, receipt of property titles, potential mineral recovery processes, etc. Forward-looking statements address future events and conditions and therefore involve inherent risks and uncertainties. Actual results may differ materially from those currently anticipated in such statements. Readers are encouraged to refer to the Company's public disclosure documents for a more detailed discussion of factors that may impact expected future results. The Company undertakes no obligation to publicly update or revise any forward-looking statements. We advise U.S. investors that the SEC's mining guidelines strictly prohibit information of this type in documents filed with the SEC. U.S. investors are cautioned that mineral deposits on adjacent properties are not indicative of mineral deposits on our properties.


VANCOUVER, BRITISH COLUMBIA--(Marketwired - Nov. 23, 2016) - Blue Sky Uranium Corp. (TSX VENTURE:BSK) (FRANKFURT:MAL2) (OTCQB:BKUCF), ("Blue Sky" or the "Company") is pleased to announce that the Company has staked ten new exploration properties (cateos) totaling 100,000 hectares in the core of the 140-kilometre mineralized trend of the Amarillo Grande Uranium Project ("the Project") in Rio Negro province, Argentina. With the addition of these new properties, Blue Sky controls all of the most prospective targets in this new uranium district, with total land holdings of over 280,000 hectares. "We are thrilled to be able to make such a significant expansion to our already highly prospective land holdings at the Amarillo Grande Project. We are moving quickly to explore all the high-priority areas and delineate our drill targets for 2017," stated Blue Sky President and CEO Nikolaos Cacos. Blue Sky has completed an initial ground geophysical survey at the Anit property of the Amarillo Grande Project using Electrical Tomography (ET). Results from the survey (see Figure 1 below) indicate that ET is an excellent indirect tool to define near-surface ancient river channels ("paleochannels") & high-conductivity horizons that potentially host uranium mineralization. Based on these results, the Company is launching a fifteen kilometre ET survey over the main targets within the Amarillo Grande project. This program will help to refine targets for a 10,000 metre RC drilling program, scheduled to commence at the beginning of 2017. There is an image associated with this release. To view the image, please click on the following link: http://media3.marketwire.com/docs/Blue%20Sky%20Graphic.pdf This new uranium district was first identified, staked and underwent preliminary exploration by Blue Sky from 2007 to 2012 as part of the Grosso Group's strategy of adding alternative energy focus to its successful portfolio of metals exploration companies. The close proximity of several major targets suggest that if resources are delineated a central processing facility would be envisioned. The area is flat-lying, semi-arid and accessible year round, with nearby rail, power and port access. Mineralization identified to date represents a Surficial Uranium style of deposit, where carnotite mineralization coats loosely consolidated pebbles of sandstone and conglomerates. Carnotite is amenable to leaching, and early metallurgical work indicates that the mineralized material can be upgraded using a very simple wet screening method. The near-surface mineralization, ability to locally upgrade, amenability to leaching and central processing possibility suggest a potentially low-cost development scenario for a future deposit. Rio Negro is host to several facilities related to the nuclear industry. Furthermore, the Provincial government is amenable to mining as a means of socio-economical development. In addition, the Federal government has expressed support for building domestic resources of uranium. In particular, the Argentina Atomic Energy National Commission (CNEA) published its Strategic Plan 2015-2025, which includes a strategic objective "To ensure the supply of domestic uranium for nuclear power plants in operation, under construction and planned." For additional details on the project and properties, please see the Company's website: www.blueskyuranium.com The contents of this news release have been reviewed and approved by David Terry, Ph.D., P.Geo. Dr. Terry is a Director of the Company and a Qualified Person as defined in National Instrument 43-101. Blue Sky Uranium Corp. is a leader in uranium discovery in Argentina. The Company's objective is to deliver exceptional returns to shareholders by rapidly advancing a portfolio of surficial uranium deposits into low-cost producers. Blue Sky holds has the exclusive right to over 428,000 hectares of property in two provinces in Argentina. The Company's flagship Amarillo Grande Project was an in-house discovery of a new district that has the potential to be among the first domestic suppliers of uranium to the growing Argentine market. The Company is a member of the Grosso Group, a resource management group that has pioneered exploration in Argentina since 1993. ON BEHALF OF THE BOARD Neither TSX Venture Exchange nor its Regulation Services Provider (as that term is defined in policies of the TSX Venture Exchange) accepts responsibility for the adequacy or accuracy of this release. This news release may contain forward-looking statements including but not limited to comments regarding the timing and content of upcoming work programs, geological interpretations, receipt of property titles, potential mineral recovery processes, etc. Forward-looking statements address future events and conditions and therefore involve inherent risks and uncertainties. Actual results may differ materially from those currently anticipated in such statements. Readers are encouraged to refer to the Company's public disclosure documents for a more detailed discussion of factors that may impact expected future results. The Company undertakes no obligation to publicly update or revise any forward-looking statements. We advise U.S. investors that the SEC's mining guidelines strictly prohibit information of this type in documents filed with the SEC. U.S. investors are cautioned that mineral deposits on adjacent properties are not indicative of mineral deposits on our properties.


Colas K.B.,Pennsylvania State University | Motta A.T.,Pennsylvania State University | Almer J.D.,Argonne National Laboratory | Daymond M.R.,Queen's University | And 4 more authors.
Acta Materialia | Year: 2010

The orientation and distribution of hydrides formed in zirconium alloy nuclear fuel cladding can strongly influence material behavior and in particular resistance to crack growth. The hydride microstructure and hydride platelet orientation (whether in-plane or radial relative to the cladding tubes) are crucial to determining cladding failure limits during mechanical testing. Hydride formation is normally studied by post-facto metallography, performed at room temperature and in the absence of applied stress. This study uses synchrotron radiation to observe in situ the kinetics of hydride dissolution and precipitation in previously hydrided Zircaloy samples. The experiments allow the direct observation of hydride dissolution, re-precipitation, and re-orientation, during heating and cooling under load. The solubility limits and the hydride-matrix orientation relationship determined from in situ experiments were in good agreement with previous post-facto examinations of bulk materials. The present measurements performed under stress and at temperature showed a characteristic diffraction signature of reoriented hydrides. The results suggest a threshold stress for hydride re-orientation between 75 and 80 MPa for the microstructure/texture studied. These results are discussed in light of existing knowledge. © 2010 AWE and Crown Copyright. Published by Elsevier Ltd. All rights reserved.


Kempf R.,CNEA | Troiani H.,Bariloche Atomic Center | Fortis A.M.,CNEA
Journal of Nuclear Materials | Year: 2013

This paper presents a project to study the effect of lead factors on the mechanical behaviour of the SA-508 type 3 Reactor Pressure Vessel (RPV) steel used in the reactor under construction Atucha II in Argentina. Charpy-V notch specimens of this steel were irradiated at the RA1 experimental reactor at a temperature of 275 °C with two lead factors (186 and 93). The neutron flux was 3.71 × 1015 n m-2 s-1 and 1.85 × 1015 n m-2 s-1 (E > 1 MeV) respectively. In both cases, the fluence was 6.6 × 1021 n m-2, which is equivalent to that received by the PHWR Atucha II RPV in 10 years of full power irradiation. The results of Charpy tests revealed significant embrittlement both in the ΔT = 14 °C and ΔT = 21 °C shifts of the ductile-brittle transition temperatures (DBTT) and in the reduction of the maximum energy absorbed. This result shows that the shift of the DBTT with a lead factor of 93 is larger than that obtained with a lead factor of 186. Then, the results of irradiation in experimental reactors (MTR) with high lead factors may not be conservative with respect to the actual RPV embrittlement. © 2012 Elsevier B.V. All rights reserved.


Kappes M.,Ohio State University | Frankel G.S.,Ohio State University | Sridhar N.,DNV Columbus Inc. | Carranza R.M.,CNEA
Journal of the Electrochemical Society | Year: 2012

Corrosion tests with gaseous H 2S require special facilities with safety features, because H 2S is a toxic and flammable gas. The possibility of replacing H 2S with thiosulfate (S 2O 3 2-), a non-toxic anion, for studying stress corrosion cracking of stainless and carbon steels in H 2S solutions was first proposed by Tsujikawa in 1993. H 2S production was detected in presence of carbon steel corroding in acidified thiosulfate-containing solutions. In this paper, the kinetics of H 2S evolution are used to estimate the range of partial pressure of H 2S that can be simulated with thiosulfate solutions. It was determined that acid brines containing 10 -4 M and 10 -3 M S 2O 3 2- could be used for replacing continuous bubbling of dilute H 2SN 2 mixtures in tests of degradation of carbon steels, with H 2S partial pressures ranging between 0.03 and 0.56 kPa. The kinetics of H 2S production were compared with the amount of sulfur in side reactions, like formation of iron sulfide films and elemental sulfur. © 2012 The Electrochemical Society.


Carlo G.G.,CNEA
Physical Review Letters | Year: 2012

It has been recently found that the so-called isoperiodic stable structures (ISSs) have a fundamental role in the classical current behavior of dissipative ratchets. Here I analyze their quantum counterparts, the quantum ISSs (QISSs), which have a fundamental role in the quantum current behavior. QISSs have the simple attractor shape of those ISSs which settle down in short times. However, in the majority of the cases they are strongly different from the ISSs, looking approximately the same as the quantum chaotic attractors that are at their vicinity in parameter space. By adding thermal fluctuations of the size of eff to the ISSs I am able to obtain very good approximations to the QISSs. I conjecture that in general, quantum chaotic attractors could be well approximated by means of just the classical information of a neighboring ISS plus thermal fluctuations. I expect to find this behavior in quantum dissipative systems in general. © 2012 American Physical Society.


Ermann L.,CNEA | Carlo G.G.,CNEA
Physical Review E - Statistical, Nonlinear, and Soft Matter Physics | Year: 2015

Quantum manifestations of isoperiodic stable structures (QISSs) have a crucial role in the current behavior of quantum dissipative ratchets. In this context, the simple shape of the ISSs has been conjectured to be an almost exclusive feature of the classical system. This has drastic consequences for many properties of the directed currents, the most important one being that it imposes a significant reduction in their maximum values, thus affecting the attainable efficiency at the quantum level. In this work we prove this conjecture by means of comprehensive numerical explorations and statistical analysis of the quantum states. We are able to describe the quantum parameter space of a paradigmatic system for different values of eff in great detail. Moreover, thanks to this we provide evidence on a mechanism that we call parametric tunneling by which the sharp classical borders of the regions in parameter space become blurred in the quantum counterpart. We expect this to be a common property of generic dissipative quantum systems. © 2015 American Physical Society.


Carlo G.G.,CNEA | Rivas A.M.F.,CNEA | Spina M.E.,CNEA
Physical Review E - Statistical, Nonlinear, and Soft Matter Physics | Year: 2015

We compare the quantum and classical properties of the (quantum) isoperiodic stable structures [(Q)ISSs], which organize the parameter space of a paradigmatic dissipative ratchet model, i.e., the dissipative modified kicked rotator. We study the spectral behavior of the corresponding classical Perron-Frobenius operators with thermal noise and the quantum superoperators without it for small eff values. We find a remarkable similarity between the classical and quantum spectra. This finding significantly extends previous results - obtained for the mean currents and asymptotic distributions only - and, on the other hand, unveils a classical to quantum correspondence mechanism where the classical noise is qualitatively different from the quantum one. This is crucial not only for simple attractors but also for chaotic ones, where just analyzing the asymptotic distribution is revealed as insufficient. Moreover, we provide with a detailed characterization of relevant eigenvectors by means of the corresponding Weyl-Wigner distributions, in order to better identify similarities and differences. Finally, this model being generic, it allows us to conjecture that this classical to quantum correspondence mechanism is a universal feature of dissipative systems. © 2015 American Physical Society.

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