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首页> 外文期刊>Annals of nuclear energy >Feasibility studies for simultaneous irradiation of NBSR & MITR fuel elements in the BR2 reactor
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Feasibility studies for simultaneous irradiation of NBSR & MITR fuel elements in the BR2 reactor

机译：在BR2反应堆中同时辐照NBSR和MITR燃料元素的可行性研究

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The BR2 reactor physics group has performed extensive neutronic feasibility studies of four Design Demonstration Element (DDE) tests foreseen for the US High Performance Research Reactor (USHPRR) conversion program. The purpose of these tests would be to irradiate the future LEU fuel elements for MURR, MITR, NBSR and HFIR in the BR2 reactor under conditions that are similar to those of the original reactor. The present paper focuses on the preliminary feasibility study for the simultaneous irradiation of the MITR-DDE and the NBSR-DDE in the BR2 reactor. In order to mimic the irradiation conditions of the original reactors for both DDEs inside the BR2 reactor, a number of irradiation scenarios and irradiation rig designs were optimized.The results obtained in this paper show that the BR2 reactor is capable to accurately recreate the typical irradiation conditions experienced by the future fuel elements of the NBSR and MITR with high fidelity. The power evolution and final burnup distributions are close to the specified values. We have proposed and have shown the possibility to irradiate both DDEs at the same time. The irradiations, if conducted as specified at fully representative powers, are long (three to five years), due to the requested relatively low power in combination with targeted elevated burnups. It is possible to reduce the irradiation time if a higher power can be accepted, but in this feasibility study, we attempted to simulate the required conditions as accurately as possible. (C) 2018 Elsevier Ltd. All rights reserved.
机译：BR2反应堆物理小组已经针对美国高性能研究堆（USHPRR）转换计划预见的四个设计演示元素（DDE）测试进行了广泛的中子可行性研究。这些测试的目的是在与原始反应堆相似的条件下，对BR2反应堆中的MURR，MITR，NBSR和HFIR未来的LEU燃料元件进行辐照。本文着重于在BR2反应器中同时辐照MITR-DDE和NBSR-DDE的初步可行性研究。为了模拟BR2反应器内部两个DDE的原始反应器的辐照条件，优化了许多辐照场景和辐照装置设计。本文获得的结果表明BR2反应器能够准确地再现典型辐照NBSR和MITR的未来燃料元件具有高保真度的条件。功率变化和最终燃耗分布接近指定值。我们已经提出并显示了同时照射两个DDE的可能性。如果按照完全有代表性的功率进行辐照，则由于要求的相对较低的功率以及目标较高的燃尽，辐照时间较长（三至五年）。如果可以接受更高的功率，则可以减少照射时间，但是在此可行性研究中，我们尝试尽可能精确地模拟所需条件。 （C）2018 Elsevier Ltd.保留所有权利。

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