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首页> 外文会议>INMM annual meeting >Conversion of the WWR-SM Research Reactor in Uzbekistan to the Use of Low Enriched Uranium Fuel
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Conversion of the WWR-SM Research Reactor in Uzbekistan to the Use of Low Enriched Uranium Fuel

机译：乌兹别克斯坦的WWR-SM研究堆转化为使用低浓铀燃料

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The WWR-SM research reactor is a Russian-supplied reactor operated by the Institute of Nuclear Physics (INP) of the Uzbekistan Academy of Sciences, near Tashkent. The reactor is utilized in a variety of programs and primarily in the production of isotopes. The WWR-SM reactor operated initially with Highly-Enriched Uranium fuel enriched to 90% U~235. The reactor was converted in 1999 to 36% enriched fuel. In collaboration with the United States Department of Energy’s National Nuclear Security Administration (NNSA), the reactor has recently been converted to the use of Low Enriched Uranium (LEU) fuel (< 20% U~235). On the part of NNSA, the conversion project has been carried out under the Global Threat Reduction Initiative (GTRI) program. Feasibility studies for the conversion of the WWR-SM reactor to LEU were performed. Advanced very high density U-Mo fuel, currently under development, was identified as the most appropriate for converting the reactor to LEU. In 2006, INP proposed to convert WWR-SM ahead of the scheduled availability of the U-Mo fuel, by temporarily using LEU uranium oxide fuel (Russian developed IRT-4M assembly), which results in higher annual fuel consumption. Plans are for using the IRT-4M fuel until the U-Mo fuel is available. Studies were performed to determine the core configuration that resulted in no significant impact on the experiment performance of the reactor and to establish the excess fuel consumption. NNSA agreed to support the early conversion of the WWR-SM reactor to LEU and a joint INP-NNSA LEU fuel procurement was conducted. INP completed the safety analysis for the LEU core and obtained regulatory approval for the conversion in November 2007. Conversion of the WWR-SM core started in March 2008 with the insertion of the first IRT-4M assemblies. The paper describes the conversion and regulatory process that was followed, and the different activities involved in the conversion of the WWR-SM reactor to LEU.
机译：WWR-SM研究堆是由俄罗斯提供的反应堆，由塔什干附近的乌兹别克斯坦科学院核物理研究所（INP）运营。该反应器用于各种程序，主要用于同位素的生产。 WWR-SM反应堆最初使用富含90％U〜235的高浓铀燃料运行。该反应堆于1999年转换为36％的富燃料。与美国能源部国家核安全局（NNSA）合作，该反应堆最近已转换为使用低浓铀（LEU）燃料（U％小于20％的铀〜235）。就NNSA而言，转换项目是在“全球减少威胁倡议”（GTRI）计划下进行的。进行了将WWR-SM反应堆转化为LEU的可行性研究。目前正在开发的先进超高密度U-Mo燃料被确定为最适合将反应堆转化为LEU的燃料。 2006年，INP提议通过暂时使用LEU铀氧化物燃料（俄罗斯开发的IRT-4M组件），在预定的U-Mo燃料可用性之前转换WWR-SM，这导致更高的年燃料消耗量。计划使用IRT-4M燃料，直到可以使用U-Mo燃料为止。进行了研究以确定对反应堆的实验性能没有重大影响的堆芯构型，并确定了多余的燃料消耗。 NNSA同意支持WWR-SM反应堆向LEU的早期转换，并进行了INP-NNSA LEU联合燃料采购。 INP在2007年11月完成了LEU核的安全性分析并获得了监管部门的批准。WWR-SM核的转换于2008年3月开始，并插入了第一批IRT-4M组件。本文介绍了随后的转换和监管流程，以及WWR-SM反应堆向LEU转换所涉及的不同活动。

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