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Modifications to the HFIR central target region to accomplish this goal are described. Since a fast-spectrum irradiation facility does not exist in the United States, HFIR can fulfill a first step in the GNEP mission that being to establish a near-term capability to irradiate materials in more » a fast neutron spectrum in addition to efforts to gain access to international facilities through partnering arrangements. The High Flux Isotope Reactor was built for the purpose of transmuting plutonium to various higher actinides including Am, Cm, and Cf. The proposed fuels include metal and oxide mixed actinides (U-Np-Pu-Am-Cm) as well as target concepts with perhaps only Am-Cm. « lessĪbstract - The Global Nuclear Energy Partnership (GNEP) is proposing to develop a sodium-cooled fast-spectrum reactor (SFR) to transmute and consume actinides from spent nuclear fuel. The results of the analyses show that the models presented in this report provide a robust and reliable basis for HFIR analyses. The calculated metrics are compared, where possible, with measurement data from preconstruction critical experiments at HFIR, data included in the current HFIR safety analysis report, and/or data from previous calculations performed with different methods or codes. The new HFIR models for Cycle 400 are used to determine various metrics of relevance to reactor performance and safety assessments. The recent enhancements in modeling and simulations for HFIR that are discussed in the present report include: (1) revision of the 2005 MCNP model for the beginning of Cycle 400 to improve the modeling data and assumptions as necessary based on appropriate primary reference sources HFIR drawings and reports (2) improvement of the fuel region model, including an explicit representation for the involute fuel plate geometry that is characteristic to HFIR fuel and (3) revision of the Monte Carlo-based depletion model for HFIR in use since 2009 but never documented in detail, with the development of a new depletion model for the HFIR explicit fuel plate representation. A HFIR core depletion model that is based on current state-of-the-art methods and nuclear data was needed to serve as reference for the design more » of an LEU fuel for HFIR.
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At this time, the core model used to perform analyses in support of HFIR operation is an MCNP model for the beginning of Cycle 400, which was documented in detail in a 2005 technical report.
LOCCKED DOORS AND HALF WALLS SIMS 4 RAR MANUALS
Publication Date: Wed Sep 01 00:00: Research Org.: Oak Ridge National Lab., TN (USA) OSTI Identifier: 6797133 Report Number(s): ORNL/TM-1138/R1 ON: DE83000384 DOE Contract Number: W-7405-ENG-26 Resource Type: Technical Report Resource Relation: Other Information: Portions of document are illegible Country of Publication: United States Language: English Subject: 21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS HFIR REACTOR MANUALS AIR CONDITIONING AUXILIARY SYSTEMS CONTAINMENT FUEL POOLS RADIATION PROTECTION RADIOACTIVE WASTES REACTOR CONTROL SYSTEMS REACTOR COOLING SYSTEMS REACTOR EXPERIMENTAL FACILITIES REACTOR INSTRUMENTATION REACTOR OPERATION VENTILATION CONTROL SYSTEMS COOLING SYSTEMS DOCUMENT TYPES ENERGY SYSTEMS ENRICHED URANIUM REACTORS IRRADIATION REACTORS ISOTOPE PRODUCTION REACTORS MATERIALS OPERATION RADIOACTIVE MATERIALS REACTOR COMPONENTS REACTORS RESEARCH AND TEST REACTORS RESEARCH REACTORS TANK TYPE REACTORS TEST REACTORS THERMAL REACTORS WASTES WATER COOLED REACTORS WATER MODERATED REACTORS 220700* - Nuclear Reactor Technology- Plutonium & Isotope Production ReactorsĪ concerted effort over the past few years has been focused on enhancing the core model for the High Flux Isotope Reactor (HFIR), as part of a comprehensive study for HFIR conversion from high-enriched uranium (HEU) to low-enriched uranium (LEU) fuel.