Molten Salt Reactor Program
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Arxiv:2003.07462V2 [Cond-Mat.Mtrl-Sci] 8 Jun 2020
The Structure of Molten FLiNaK Benjamin A. Frandsena,∗, Stella D. Nickersonb, Austin D. Clarkb, Andrew Solanob, Raju Barala, Jonathan Williamsb, J¨orgNeuefeindc, Matthew Memmottb aDepartment of Physics and Astronomy, Brigham Young University, Provo, Utah 84602, USA. bDepartment of Chemical Engineering, Brigham Young University, Provo, Utah 84602, USA. cNeutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA. Abstract The structure of the molten salt (LiF)0:465(NaF)0:115(KF)0:42 (FLiNaK), a potential coolant for molten salt nuclear reactors, has been studied by ab initio molecular dynamics simulations and neutron total scattering experiments. We find that the salt retains well-defined short-range structural correlations out to approximately 9 A˚ at typical reactor operating temperatures. The experimentally determined pair distribution function can be described with quantitative accuracy by the molecular dynamics simulations. These results indicate that the essential ionic interactions are properly captured by the simulations, providing a launching point for future studies of FLiNaK and other molten salts for nuclear reactor applications.1 Keywords: molten salt reactor, FLiNaK, total scattering, pair distribution function, molecular dynamics Molten salt reactors (MSRs) are a promising nuclear reactor concept in which fuel and/or fertile material are dissolved directly into a halide salt coolant. This has significant benefits over traditional light water reactors (LWRs) that are in operation today, including the capability of producing medical radioisotopes and electricity simultane- ously in large amounts [1] and the possibility of reactor designs that prevent proliferation of weaponizable material, eliminate the risk of meltdown events, and avoid producing long-lived transuranic nuclear waste [2, 3]. -
Molten Salts As Blanket Fluids in Controlled Fusion Reactors [Disc 6]
r1 0 R N L-TM-4047 MOLTEN SALTS AS BLANKET FLUIDS IN CONTROLLED FUSION REACTORS W. R. Grimes Stanley Cantor .:, .:, .- t. This report was prepared as an account of work sponsored by the United States Government. Neither the United States nor the United States Atomic Energy Commission, nor any of their employees, nor any of their contractors, subcontractors, or their employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness or usefulness of any information, apparatus, product or process disclosed, or represents that its use would not infringe privately owned rights. om-TM- 4047 Contract No. W-7405-eng-26 REACTOR CHENISTRY DIVISION MOLTEN SALTS AS BLANKET FLUIDS IN CONTROLLED FUSION REACTORS W. R. Grimes and Stanley Cantor DECEMBER 1972 OAK RIDGE NATIONAL LABORATORY Oak Ridge, Tennessee 37830 operated by UNION CARBIDE CORPORATION for the 1J.S. ATOMIC ENERGY COMMISSION This report was prepared as an account of work sponsored by the United States Government. Neither the United States nor the United States Atomic Energy Commission, nor any of their employees, nor any of their contractors, subcontractors, or their employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, com- pleteness or usefulness of any information, apparatus, product or process disclosed, or represents that its use would not infringe privately owned rights. i iii CONTENTS Page Abstract ............................. 1 Introduction ........................... 2 Behavior of Li2BeFq in a Eypothetical CTR ............3 Effects of Strong Magnetic Fields .............5 Effects on Chemical Stability .............5 Effects on Fluid Dynamics ...............7 Production of Tritium .................. -
Recent Research of Thorium Molten-Salt Reactor from a Sustainability Viewpoint
Sustainability 2012, 4, 2399-2418; doi:10.3390/su4102399 OPEN ACCESS sustainability ISSN 2071-1050 www.mdpi.com/journal/sustainability Article Recent Research of Thorium Molten-Salt Reactor from a Sustainability Viewpoint Takashi Kamei Research Institute for Applied Sciences, 49, Tanaka-Oi-cho, Sakyo-ku, Kyoto 606-8202, Japan; E-Mail: [email protected]; Tel.: +81-75-701-3164; Fax: +81-75-492-0679. Received: 3 July 2012; in revised form: 20 August 2012 / Accepted: 24 August 2012 / Published: 27 September 2012 Abstract: The most important target of the concept “sustainability” is to achieve fairness between generations. Its expanding interpolation leads to achieve fairness within a generation. Thus, it is necessary to discuss the role of nuclear power from the viewpoint of this definition. The history of nuclear power has been the control of the nuclear fission reaction. Once this is obtained, then the economy of the system is required. On the other hand, it is also necessary to consider the internalization of the external diseconomy to avoid damage to human society caused by the economic activity itself, due to its limited capacity. An extreme example is waste. Thus, reducing radioactive waste resulting from nuclear power is essential. Nuclear non-proliferation must be guaranteed. Moreover, the FUKUSHIMA accident revealed that it is still not enough that human beings control nuclear reaction. Further, the most essential issue for sustaining use of one technology is human resources in manufacturing, operation, policy-making and education. Nuclear power will be able to satisfy the requirements of sustainability only when these subjects are addressed. The author will review recent activities of a thorium molten-salt reactor (MSR) as a cornerstone for a sustainable society and describe its objectives and forecasts. -
Structure Dependence of the Diamagnetism of Graphitizing Carbons
NATIONAL AERONAUTICS AND SPACE ADMINISTRATION Technical Report 32-1208 Structure Dependence of the Diamagnetism of Graphitizing Carbons D. B. Fischbach (ACCESSION NUMBER) (THRU) (PAGES) (CODE) B (NASA cVoFTTMxTOR AD NUMBER) (CATEGORY) u I "(AVAILABLE TO NASA OFFICES AND 1 r^-RESEARCH CENTERS ONLY UJ U O9- JU= ao O !JT 5 ? § 5 i ft. u. O U JET PROPULSION LABORATORY CALIFORNIA INSTITUTE OF TECHNOLOGY PASADENA, CALIFORNIA December 1, 1967 NATIONAL AERONAUTICS AND SPACE ADMINISTRATION Technical Report 32-1208 Structure Dependence of the Diamagnetism of Graphitizing Carbons D. B. Fischbach Approved by: H. E. Martens, Manager Materials Section JET PROPULSION LABORATORY CALIFORNIA INSTITUTE OF TECHNOLOGY PASADENA, CALIFORNIA December ], 1967 TECHNICAL REPORT 32-7208 Copyright © 1967 Jet Propulsion Laboratory California Institute of Technology Prepared Under Contract No MAS 7-100 National Aeronautics & Space Administration P CED.NG PAGE BLANK NOT Acknowledgment Special thanks are extended to O. J. Guentert of the Research Division, Raytheon Co., for providing a set of pyrolytic carbon samples with known crys- tallite layer diameter La; and to C. W. Nezbeda, Parma Technical Center, Union Carbide Corp., for supplying the pure silver calibration sample. R. J. Diefendorf (then of the Research Laboratory, General Electric Co.), now of Rensselaer Polytechnic Institute, and D. Schiff, formerly of Hi-Temp Materials Corp., sup- plied many of the other pyrolytic carbons. O. Kilham and T. Baugh (suscepti- bility) and T. Rogacs (X-ray diffraction), formerly of JPL, assisted in taking the data. Appreciation is extended to H. E. Martens, JPL, for support and helpful discussions. JPL TECHNICAL REPORT 32-7208 Page intentionally left blank Page intentionally left blank PRECEDING PAGE BLANK NOT FILMED. -
Molten-Salt Technology and Fission Product Handling
Molten-Salt Technology and Fission Product Handling Kirk Sorensen Flibe Energy, Inc. ORNL MSR Workshop October 4, 2018 2018-10-16 Hello, my name is Kirk Sorensen and I’d like to talk with you today about fission products and their handling in molten-salt reactors. One of the things that initially attracted me to molten-salt reactor technology was the array of options that it gave for the intelligent handling of fission products. It represented such a contrast to solid-fueled systems, which mixed fission products in with unburned nuclear fuel in a form that was difficult to separate, one from another. While my focus will be on our work on molten-salt reactor fission product handling, many of the principles are general to molten-salt reactors as a whole. Fundamental Nuclear Reactor Concept In its simplest form, a nuclear reactor generates thermal energy that is carried away by a coolant. That coolant heats the working fluid of a power conversion system, which generates electricity from part of the thermal energy and rejects the remainder to the environment. coolant working fluid fresh fuel electricity Power Nuclear Heat Conversion Reactor Exchanger System spent fuel heated water or air coolant working fluid The primary coolant chosen for a nuclear reactor determines, in large part, its size and manufacturability. The temperature of the coolant determines the efficiency of electrical generation. Fundamental Nuclear Reactor Concept In its simplest form, a nuclear reactor generates thermal energy that is carried away by a coolant. That coolant heats the working fluid of a power conversion system, which generates electricity from part of the thermal energy and rejects the remainder to the environment. -
Molten-Salt Fast Reactors
MOLTEN-SALT FAST REACTORS L. G. Alexander Oak Ridge National Laboratory Oak Ridge, Tennessee Thorium, plutonium, and uranium chlorides and fluorides are soluble in mixtures of the halides of Li, Be, Na, K, Mg, and other metals. Their fluoride solutions, at least, are compatible with INOR (an alloy consisting primarily of nickel). They are also compatible with graphite, a structural material as well as a moderator having many desirable properties for high-temperature application. Thus, many embodiments are possible for molten-salt reactors, ranging from simple one-fluid, one-region systems externally cooled to complex internally cooled, two-region, two- fluid systems. The capabilities of only a few of the more obvious systems have been studied so far. The nuclear and economic potentials of several thermal reactors have been evaluated heretofore, (1-3) and recently a limited program for the preliminary evaluation of fast molten-salt reactor concepts was instituted. Appropriate background studies were performed: (1) a survey was made of data available about the thermal and physical properties of molten fluoride and chloride salt mixtures, (2) the compatibilities of selected reactor materials with various reactor coolants and with molten-salt fuels were studied, (3) potential processing methods for irradiated molten fluoride and chloride reactor fuels were reviewed, and (4) data available for the nuclear properties of chlorine, nickel, and other nuclides of interest were reviewed. The compositions and physical properties of typical molten-salt -
Status of Fast Spectrum Molten Salt Reactor Waste Management Practice December 2020
PNNL-30739 Status of Fast Spectrum Molten Salt Reactor Waste Management Practice December 2020 Stuart T Arm David E Holcomb* Robert L Howard Brian Riley *Oak Ridge National Laboratory Prepared for the U.S. Department of Energy under Contract DE-AC05-76RL01830 Choose an item. DISCLAIMER This report was prepared as an account of work sponsored by an agency of the United States Government. Neither the United States Government nor any agency thereof, nor Battelle Memorial Institute, nor any of their employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights. Reference herein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise does not necessarily constitute or imply its endorsement, recommendation, or favoring by the United States Government or any agency thereof, or Battelle Memorial Institute. The views and opinions of authors expressed herein do not necessarily state or reflect those of the United States Government or any agency thereof. PACIFIC NORTHWEST NATIONAL LABORATORY operated by BATTELLE for the UNITED STATES DEPARTMENT OF ENERGY under Contract DE-AC05-76RL01830 Printed in the United States of America Available to DOE and DOE contractors from the Office of Scientific and Technical Information, P.O. Box 62, Oak Ridge, TN 37831-0062; ph: (865) 576-8401 fax: (865) 576-5728 email: [email protected] Available to the public from the National Technical Information Service 5301 Shawnee Rd., Alexandria, VA 22312 ph: (800) 553-NTIS (6847) email: [email protected] <https://www.ntis.gov/about> Online ordering: http://www.ntis.gov Choose an item. -
Selective Direct Laser Writing of Pyrolytic Carbon Microelectrodes in Absorber-Modified SU-8
micromachines Article Selective Direct Laser Writing of Pyrolytic Carbon Microelectrodes in Absorber-Modified SU-8 Emil Ludvigsen 1 , Nina Ritter Pedersen 1, Xiaolong Zhu 2, Rodolphe Marie 2, David M. A. Mackenzie 3 , Jenny Emnéus 4, Dirch Hjorth Petersen 5, Anders Kristensen 2 and Stephan Sylvest Keller 1,* 1 National Centre for Nano Fabrication and Characterization, DTU Nanolab, Technical University of Denmark, Ørsteds Plads, Building 345B, 2800 Kgs. Lyngby, Denmark; [email protected] (E.L.); [email protected] (N.R.P.) 2 Department of Health Technology, DTU Health Tech, Technical University of Denmark, Ørsteds Plads, Building 345C, 2800 Kgs. Lyngby, Denmark; [email protected] (X.Z.); [email protected] (R.M.); [email protected] (A.K.) 3 Department of Physics, DTU Physics, Technical University of Denmark, Fysikvej, Building 311, 2800 Kgs. Lyngby, Denmark; [email protected] 4 Department of Biotechnology and Biomedicine, DTU Bioengineering, Technical University of Denmark, Produktionstorvet, Building 423, 2800 Kgs. Lyngby, Denmark; [email protected] 5 Department of Energy Conversion and Storage, DTU Energy, Technical University of Denmark, Fysikvej, Building 310, 2800 Kgs. Lyngby, Denmark; [email protected] * Correspondence: [email protected]; Tel.: +45-45-25-58-46 Abstract: Pyrolytic carbon microelectrodes (PCMEs) are a promising alternative to their conventional metallic counterparts for various applications. Thus, methods for the simple and inexpensive patterning of PCMEs are highly sought after. Here, we demonstrate the fabrication of PCMEs through Citation: Ludvigsen, E.; Pedersen, the selective pyrolysis of SU-8 photoresist by irradiation with a low-power, 806 nm, continuous N.R.; Zhu, X.; Marie, R.; Mackenzie, wave, semiconductor-diode laser. -
In Pyrolytic Carbons ,\
NATIONAL AERONAUTICS AND SPACE ADMlNlSTRATtON .. in Pyrolytic Carbons ,\ 'I $ h GPO PRICE $ CFSTI PRICE(S) $ -1 I ! Hard copy (HC) 2 -0a Microfiche (MF) <I ff853 July 65 ET PROPULSION LABORATORY $ CALIFORNIA INSTITUTE OF TECHNOLOGY 8 PASAD E N A, C A LI FOR N I A February 1, 1966 NATIONAL AERONAUTICS AND SPACE ADMINISTRATION Technical Report No. 32-532 Kinetics of Graphitization !. !. The Higb - Temperature Structural Transformation in Pyrolytic Carbons E. S. Fischbach (<. (<. oe, Manager Kterials Section JET PROPULSION LABORATORY CALIFORNIA INSTITUTE OF TECHNOLOGY PASADENA.CALIFORNIA February 1, 1966 Copyright @ 1966 Jet Propulsion Laboratory California Institute of Technology Prepared Under Contract No. NAS 7-100 National Aeronautics & Space Administration . JPL TECHNICAL REPORT NO . 32-532 CONTENTS 1 . Introduction ..................... 1 II. Experimental Procedure ................ 3 A . Materials ..................... 3 B . Measurement Techniques ............... 5 C . Heat Treatment ................... 6 111 . Experimental Results ................. 7 A . Unit-Cell Height ................... 7 B . Diamagnetic Susceptibility ............... 9 C . Preferred Orientation (x-ray) .............. 10 D . Apparent Crystallite Diameter .............. 11 E . Microstructure ...................11 F. Dimensional Changes .................13 G . Activation Energy for Graphitization ............ 13 IV. Discussion ...................... 16 V . Summary ...................... 21 Annnnrliv A Una+ Trna+mnnk Ttmn rnrrar+inn . _-9.3 r.rr. ..-.0. ...... I... -
Remote Operations and Maintenance Framework for Molten Salt Reactors
ORNL/TM-2018/1107 Remote Operations and Maintenance Framework for Molten Salt Reactors David E. Holcomb Charles L. Britton, Jr. Venugopal K. Varma Louise G. Worrall December 2018 Approved for public release. Distribution is unlimited. DOCUMENT AVAILABILITY Reports produced after January 1, 1996, are generally available free via US Department of Energy (DOE) SciTech Connect. Website www.osti.gov Reports produced before January 1, 1996, may be purchased by members of the public from the following source: National Technical Information Service 5285 Port Royal Road Springfield, VA 22161 Telephone 703-605-6000 (1-800-553-6847) TDD 703-487-4639 Fax 703-605-6900 E-mail [email protected] Website http://classic.ntis.gov/ Reports are available to DOE employees, DOE contractors, Energy Technology Data Exchange representatives, and International Nuclear Information System representatives from the following source: Office of Scientific and Technical Information PO Box 62 Oak Ridge, TN 37831 Telephone 865-576-8401 Fax 865-576-5728 E-mail [email protected] Website http://www.osti.gov/contact.html This report was prepared as an account of work sponsored by an agency of the United States Government. Neither the United States Government nor any agency thereof, nor any of their employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights. Reference herein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise, does not necessarily constitute or imply its endorsement, recommendation, or favoring by the United States Government or any agency thereof. -
231Pa and 232U Production in a Fusion Breeder to Aid Nonproliferation with Thorium Fission Fuel Cycles
Vallecitos Molten Salt Research Report No. 5 Rev.1 September 9, 2014 231Pa and 232U production in a fusion breeder to aid nonproliferation with thorium fission fuel cycles Ralph W. Moir Abstract 231Pa is made especially copiously in a fusion reactor blanket by n,2n reactions on 232Th owing to fusion’s uniquely high neutron energy being well above the reaction threshold unlike fission neutrons. The 231Pa can be extracted for use in making thorium cycles more proliferation resistant or left in the fusion reactor’s blanket to produce 232U for self- protection of the produced 233U or some of both. Typical fusion production rates of 231Pa 233 and U are of order 0.1 and 2 kg per full power year per MWfusion, respectively. Neutrons captured in 231Pa produce 232U that contributes to making 233U a 231 nonproliferant. Pa revenues per Wnucleary range from 0.08 $ to 0.5 $ depending on blanket design and market value of isotopes. By comparison, the electricity revenues is typically 0.1 $ at Q=2 and falling for Q<2 (Q=fusion power/input power). 1. Introduction This note describes a fusion breeder designed to produce 231Pa, 232U and 233U for use in molten salt reactors that are described in a companion note.1 Special emphasis is given to nonproliferation of weapons useable materials. As opposed to a fission breeder reactor, a fusion breeder reactor can produce far more fissile material for the same amount of nuclear power by an order of magnitude so that we can think of a fusion breeder being located in a site and supplying the isotopes (231Pa, 232U and 233U) to dozens of fission reactors at various sites. -
System Studies of Fission-Fusion Hybrid Molten Salt Reactors
University of Tennessee, Knoxville TRACE: Tennessee Research and Creative Exchange Doctoral Dissertations Graduate School 12-2013 SYSTEM STUDIES OF FISSION-FUSION HYBRID MOLTEN SALT REACTORS Robert D. Woolley University of Tennessee - Knoxville, [email protected] Follow this and additional works at: https://trace.tennessee.edu/utk_graddiss Part of the Nuclear Engineering Commons Recommended Citation Woolley, Robert D., "SYSTEM STUDIES OF FISSION-FUSION HYBRID MOLTEN SALT REACTORS. " PhD diss., University of Tennessee, 2013. https://trace.tennessee.edu/utk_graddiss/2628 This Dissertation is brought to you for free and open access by the Graduate School at TRACE: Tennessee Research and Creative Exchange. It has been accepted for inclusion in Doctoral Dissertations by an authorized administrator of TRACE: Tennessee Research and Creative Exchange. For more information, please contact [email protected]. To the Graduate Council: I am submitting herewith a dissertation written by Robert D. Woolley entitled "SYSTEM STUDIES OF FISSION-FUSION HYBRID MOLTEN SALT REACTORS." I have examined the final electronic copy of this dissertation for form and content and recommend that it be accepted in partial fulfillment of the equirr ements for the degree of Doctor of Philosophy, with a major in Nuclear Engineering. Laurence F. Miller, Major Professor We have read this dissertation and recommend its acceptance: Ronald E. Pevey, Arthur E. Ruggles, Robert M. Counce Accepted for the Council: Carolyn R. Hodges Vice Provost and Dean of the Graduate School (Original signatures are on file with official studentecor r ds.) SYSTEM STUDIES OF FISSION-FUSION HYBRID MOLTEN SALT REACTORS A Dissertation Presented for the Doctor of Philosophy Degree The University of Tennessee, Knoxville Robert D.