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A Spatial Dynamic Model of the SHELF-M Reactor Facility with Fuel and Coolant Temperature Feedbacks 考虑燃料和冷却剂温度反馈的SHELF-M反应堆设施空间动力学模型
Q4 Energy Pub Date : 2022-09-01 DOI: 10.26583/npe.2022.3.03
D. Plotnikov, A. L. Lobarev, Ivan Nikolayevich Krivoshein, P. B. Kuznetsov, A. Ivanyuta
The evolution of nuclear power is inseparably linked with the development of breakthrough solutions in the field of economic development of new territories. A pressing issue in this connection nowadays is generation of power for remote and hard-to-reach areas with decentralized power supply. To resolve this issue, JSC NIKIET is developing a version of the SHELF-M modular water-cooled water-moderated reactor facility as a source of power for offshore installations, including the Arctic coast areas, as well as localities with practically no power and transport infrastructure. One of the stages in justifying the safety of the reactor facility operation is to investigate the behavior of the reactor facility in dynamic transient modes at various power levels. To this end, a spatial dynamic model has been developed for the reactor facility with fuel and coolant temperature feedbacks. The dynamic model development process is a complex task that includes both preparation of constants for subsequent calculations and generation of the reactor neutronic and thermophysical models. The paper describes the development stages of the SHELF-M reactor facility spatial dynamic model and the results of coupled neutronic and thermophysical calculations for transients using the developed dynamic model of the reactor. Shim rod movement in the cold and hot states of the SHELF-M reactor facility is considered as transients.
核电的发展与新领土经济发展领域的突破性解决方案的发展是密不可分的。在这方面,目前一个紧迫的问题是为偏远和难以到达的分散供电地区发电。为了解决这个问题,JSC NIKIET正在开发一种SHELF-M模块化水冷水慢化反应堆设施,作为海上设施的电力来源,包括北极海岸地区,以及几乎没有电力和交通基础设施的地区。验证反应堆设施运行安全性的一个阶段是研究反应堆设施在不同功率水平下的动态瞬态模式的行为。为此,建立了具有燃料和冷却剂温度反馈的反应堆设施空间动力学模型。动态模型开发过程是一项复杂的任务,既包括为后续计算准备常数,也包括反应堆中子和热物理模型的生成。本文介绍了SHELF-M反应堆设施空间动力学模型的发展阶段,以及利用所开发的反应堆动力学模型进行瞬态中子和热物理耦合计算的结果。在SHELF-M反应堆设施的冷态和热态下,垫片棒的运动被认为是瞬态的。
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引用次数: 0
Hybrid Fusion-Fission Reactor Facility: Power Profiling 混合聚变裂变反应堆设施:功率分析
Q4 Energy Pub Date : 2022-09-01 DOI: 10.26583/npe.2022.3.04
S. V. Bedenko, I. Lutsik, A. Matyushin, S. D. Polozkov, V. Shmakov, D. Modestov, V. Prikhodko, A. Arzhannikov
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引用次数: 0
Computational Simulation of Minor Actinide Burning in a BN-600 Reactor with Fuel without Uranium and Plutonium BN-600无铀无钚反应堆中微量锕系元素燃烧的计算模拟
Q4 Energy Pub Date : 2022-09-01 DOI: 10.26583/npe.2022.3.12
V. Korobeynikov, V. V. Kolesov, Igor A. Ignatiev
The paper presents the results of studies on the burning of minor actinides (MA) extracted from SNF of thermal reactors in a BN-600 reactor, which uses the complete set of MAs instead of traditional nuclear fuel types: uranium and/or plutonium. The advantages of such approach to MA burning are that long-lived waste is recycled and energy is produced that can be used, e.g., to generate electricity. Besides, where, e.g., a reactor with uranium or MOX fuel is used for transmutation, apart from burning “foreign” minor actinides, it will additionally generate “its own” MAs. The studies have shown that such reactor can be efficient only if based on fast neutrons, which is due to the specific properties of the minor actinide neutron capture and fission cross-sections as compared with traditional fuel nuclides. The calculation results have shown rather a high rate of MA transmutation and burning in a reactor fueled with minor actinides.
本文介绍了从热堆SNF中提取的微量锕系元素(MA)在BN-600反应堆中燃烧的研究结果,该反应堆使用整套MA代替传统的核燃料类型:铀和/或钚。这种方法对MA燃烧的好处是,长寿命的废物被回收利用,并产生可用于发电等的能源。此外,例如,在使用铀或MOX燃料的反应堆进行嬗变时,除了燃烧“外来的”小锕系元素外,它还会产生“自己的”MAs。研究表明,这种反应堆只有基于快中子才能有效,这是由于与传统燃料核素相比,小锕系元素的中子捕获和裂变截面具有特殊的性质。计算结果表明,在以少量锕系元素为燃料的反应堆中,MA的嬗变和燃烧率相当高。
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引用次数: 0
The Role of Nickel in Forming a Structure Providing Increased Service Properties of Reactor Structural Materials 镍在形成结构中的作用,提高了反应堆结构材料的使用性能
Q4 Energy Pub Date : 2022-09-01 DOI: 10.26583/npe.2022.3.11
E. Kuleshova, I. Fedotov, N. Stepanov, A. Frolov, D. A. Maltsev, D. Safonov
Nickel is an essential alloying element in steels used as structural materials in the most common nuclear power reactors of the VVER type. The paper considers reviews the results of structural studies of traditional and advanced materials of the vessels and internals of VVER-type reactors with high nickel contents in their compositions. It is shown that an increased nickel content (up to 5 wt.%) in the steels of VVER pressure vessels contributes to the formation of a more dispersed structure with a smaller size of substructural elements and an increased density of dislocations, as well as a higher volume density of carbide phases. The revealed features of the structure of the reactor pressure vessel steel with high nickel content have the prerequisites for improving the strength and viscoplastic properties due to the increased number of barriers both for the dislocation motion and brittle crack propagation. Using the example of materials for VVER internals, it is shown that the nickel content increased in them up to 25 wt.% contributes to an increase in the volume density of radiation defects (dislocation loops of various types) and radiation-induced phase precipitates (G-phase). As nickel increases from 10 to 25 wt.%, there is a tendency to reduce swelling, which contributes to less shape change of the components of the reactor vessel internals. At the same time, in the steel with the highest nickel content, the highest nickel content was found in the near-boundary regions of the matrix, which contributes to greater austenite stability and a lower probability of the formation of an embrittling α-phase. The data obtained in the work on the effect of nickel alloying on the steel structural phase state and service characteristics were used in the development of new materials for the vessels and internals of advanced reactors.
镍是在最常见的VVER型核动力反应堆中用作结构材料的钢中必不可少的合金元素。本文综述了高含镍vver型反应器容器和内部的传统材料和先进材料的结构研究成果。结果表明,VVER压力容器钢中镍含量的增加(高达5 wt.%)有助于形成更分散的结构,其亚结构元素尺寸更小,位错密度更高,碳化物相体积密度更高。高镍反应器压力容器钢的结构特征为提高其强度和粘塑性性能提供了先决条件,这是由于位错运动和脆性裂纹扩展的屏障数量增加。以VVER内件材料为例,镍含量增加到25wt .%时,辐射缺陷(各种类型的位错环)和辐射诱导相沉淀(g相)的体积密度增加。当镍从10%增加到25wt .%时,有减少膨胀的趋势,这有助于减少反应堆容器内部部件的形状变化。同时,在镍含量最高的钢中,镍含量最高的是在基体的近边界区域,这有助于提高奥氏体的稳定性和形成脆化α-相的可能性较低。研究镍合金化对钢结构相态和使用特性影响的数据,用于先进反应堆容器和内部新材料的开发。
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引用次数: 1
Multiple Usage of Thorium-Based Fuel in a VVER-1000 Reactor 钍基燃料在VVER-1000反应堆中的多重使用
Q4 Energy Pub Date : 2022-09-01 DOI: 10.26583/npe.2022.3.05
Y. Kazansky, Nikita O. Kushnir, Ekaterina Sergeevna Khnykina
This paper considers the use of unconventional fuel in nuclear power reactors, using the example of a VVER-type unit, in order to find out the possibility of saving natural fissile uranium nuclei. Saving fissile uranium is one of the important tasks, the solution of which will give time for the development of a two-component nuclear power industry that will have no problems with fuel resources. However, at present, the reserves of cheap uranium can provide the existing level of global nuclear energy for only 80–100 years. The main components of this proposed fuel are 232Th and fissile isotopes of uranium: 235U (loaded) and 233U (produced from thorium). All the uranium isotopes and added 235U nuclei at the beginning of the campaign account for about 6% of the number of thorium nuclei and uranium isotopes. The abbreviated name of this fuel is TORUR-5. To keep fissionable nuclei in the fuel cycle after the spent fuel is unloaded, it is envisaged that all the heavy nuclei will be returned back to the reactor after they have been cleaned from fission fragments, i.e., the fuel cycle will be closed. At the same time, the principle of annual movement of fuel assemblies (as they burn up) is the same as in the existing VVER-1000 reactors. Using the Serpent software, a reactor model was built, the composition and dimensions of which were close to the parameters of the VVER-1000 serial unit. The main results of calculations were the quantitative compositions of isotopes annually loaded into the reactor as well as the amounts of 235U and thorium added also annually. The analysis of the obtained results allowed us to make the following conclusions. The annual reloading of 235U during the computation period is required almost at a constant level and, in comparison with uranium fuel, is about half as much. This is feasible for the following reasons. Part of the fissions of 235U is replaced by the fission of 233U produced from 232Th. In addition, fissionable nuclei are kept in the closed Th-U fuel cycle. This is the first “advantage” of the proposed fuel. TORUR-5 requires uranium enriched to at least 90%, the cost of which is several times higher than that of 3–5% enriched uranium. But since much less highly enriched uranium is required, the cost of fuel for a TORUR-5-fueled VVER-1000 reactor is significantly lower. This is the second “advantage” of the proposed fuel. The negative characteristic of TORUR-5, which requires further investigation, is that, after the initial loading, several uranium isotopes appear in the returned fuel, the total radioactivity of which, according to estimates, exceeds the radioactivity of traditional 3–5% enriched uranium fuel by several thousand times. At the same time, the radioactivity of discharged spent conventional fuel exceeds the radioactivity of fresh fuel by millions of times, and this problem has been solved at NPPs both organizationally and technically. Therefore, it will be necessary to develop a technology for loa
本文以某vver型机组为例,研究了在核动力反应堆中使用非常规燃料的问题,以探索节约天然可裂变铀核的可能性。节约可裂变铀是一项重要任务,解决这一问题将为发展没有燃料资源问题的双组分核动力工业争取时间。然而,目前,廉价铀的储量只能提供全球现有水平的核能80-100年。这种提议的燃料的主要成分是232Th和铀的可裂变同位素:235U(装载)和233U(由钍产生)。所有铀同位素和活动开始时添加的235U核约占钍核和铀同位素数量的6%。这种燃料的缩写是TORUR-5。为了在乏燃料卸载后将可裂变的核保留在燃料循环中,设想所有重核在从裂变碎片中清除后将返回反应堆,即关闭燃料循环。同时,燃料组件的年度运动原理(燃烧时)与现有的VVER-1000反应堆相同。利用Serpent软件建立了反应器模型,其组成和尺寸与VVER-1000系列机组参数接近。计算的主要结果是每年装载到反应堆中的同位素的定量组成,以及每年添加的235U和钍的数量。对所得结果的分析使我们能够得出以下结论。在计算期间,每年需要的235U的再装填量几乎是恒定的,与铀燃料相比,大约是它的一半。这是可行的,原因如下。235U的部分裂变被232Th产生的233U的裂变所取代。此外,可裂变的原子核被保存在封闭的钍铀燃料循环中。这是该燃料的第一个“优势”。TORUR-5需要浓缩到90%以上的铀,其成本比浓缩到3-5%的铀高出几倍。但由于所需的高浓缩铀要少得多,因此torur -5燃料的VVER-1000反应堆的燃料成本要低得多。这是该燃料的第二个“优势”。TORUR-5的负面特征是,在初始装载后,在返回的燃料中出现了几种铀同位素,据估计,其总放射性超过传统的3-5%浓缩铀燃料的放射性数千倍,这需要进一步调查。同时,排放的乏燃料的放射性是新燃料的数百万倍,这一问题在核电厂已经从组织上和技术上得到了解决。因此,考虑到估计的放射性,有必要开发一种装载TORUR-5的技术。
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引用次数: 0
Probabilistic Estimation of the Residual Lifetime of the VVER Coolant Loop Elements in Aging Control 老化控制中VVER冷却剂回路元件剩余寿命的概率估计
Q4 Energy Pub Date : 2022-09-01 DOI: 10.26583/npe.2022.3.09
O. M. Gulina, Anastasiya Valerievna Merkun, V. P. Semishkin
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引用次数: 0
Study into the Physical Chemistry and Technology of Alkali Liquid Metal Coolantsn for Nuclear and Thermonuclear Power Plants 核电厂和热核电厂用碱液金属冷却剂的物理化学和工艺研究
Q4 Energy Pub Date : 2022-09-01 DOI: 10.26583/npe.2022.3.01
A. Sorokin, J. Kuzina, R. Askhadullin, V. V. Alekseev
It is shown that, as the result of developing alkali liquid metal coolants, including sodium, eutectic sodium-potassium alloy, lithium and cesium, the scientific basis has been established for their application in nuclear power. The paper presents data from investigations of thermophysical, neutronic and physicochemical properties and characteristics of various alkali liquid metal coolants, the content of solid-phase and dissolved impurities in coolants, mass transport of impurities in circulation circuits with alkali liquid metal coolants, development of systems for removal of impurities, and control of the content of impurities in alkali liquid metal coolants. Alkali liquid metal coolants are considered as a part of a system that includes a structural material in contact with the coolant, and a gas space that compensates for the thermal expansion of the coolant. The state of the system is defined by the physicochemical properties of the system’s components. And the coolant and the structural materials also represent subsystems consisting of a base material, a coolant and impurities contained both in the material and in the coolant. It has been shown that each alkali liquid metal coolant has its own set of impurities that define its technology. It depends on the physicochemical properties of the solution of the structural material impurities and components in the coolant. Objectives have been formulated for investigating further alkali liquid metal coolants, as stemming from the need to improve the efficiency, environmental friendliness, reliability and safety, and for extending the life of nuclear power plants in operation or under design. Alkali liquid metals are promising candidate materials for being used in thermonuclear power not only as the coolant but also as the tritium breeding medium. These include, first of all, lithium and its eutectic alloy with lead (17 at. % of lithium). The possibility for using lithium or a lithium-lead alloy as a coolant in the blanket of the international thermonuclear power reactor is compared.
结果表明,钠、共晶钠钾合金、锂、铯等碱金属液态冷却剂的研制,为其在核电中的应用奠定了科学基础。本文介绍了各种碱液金属冷却剂的热物理、中子和物理化学性质和特性,冷却剂中固相和溶解杂质的含量,碱液金属冷却剂循环回路中杂质的质量传递,杂质去除系统的开发以及碱液金属冷却剂中杂质含量的控制等方面的研究数据。碱液态金属冷却剂被认为是系统的一部分,该系统包括与冷却剂接触的结构材料和补偿冷却剂热膨胀的气体空间。系统的状态是由系统组成部分的物理化学性质决定的。而冷却剂和结构材料也代表子系统,由基础材料,冷却剂和材料和冷却剂中含有的杂质组成。研究表明,每一种碱金属液态冷却剂都有自己的一套杂质,这些杂质决定了它的技术。它取决于冷却剂中结构材料杂质和成分的溶液的物理化学性质。由于需要提高效率、环境友好性、可靠性和安全性,以及为了延长正在运行或正在设计中的核电站的寿命,已经制定了进一步研究碱液金属冷却剂的目标。碱液金属是热核发电中很有前途的候选材料,不仅可以作为冷却剂,还可以作为氚增殖介质。这些首先包括锂及其与铅(17 at)的共晶合金。%的锂)。比较了在国际热核反应堆包层中使用锂或锂铅合金作为冷却剂的可能性。
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引用次数: 1
Ranking of Information Flows in the Technical Diagnostics Systems of the VVER-1200 Power Unit VVER-1200机组技术诊断系统信息流排序
Q4 Energy Pub Date : 2022-09-01 DOI: 10.26583/npe.2022.3.06
N. Bocharova, A. Voronov, M. T. Slepov
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引用次数: 0
Computational Analysis of the Power Conversion Loop of a Nuclear Power Plant Unit with the Closed S-CO2 Brayton Cycle S-CO2闭式布雷顿循环核电机组功率转换回路的计算分析
Q4 Energy Pub Date : 2022-09-01 DOI: 10.26583/npe.2022.3.02
Sergei Terent’evich Leskin, V. Slobodchuk, Aleksandr Sergeevich Shelegov
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引用次数: 0
Radiolysis of the Coolant in the EGP-6 Reactor of the Bilibino NPP 比利比诺核电站EGP-6反应堆冷却剂的辐射分解
Q4 Energy Pub Date : 2022-09-01 DOI: 10.26583/npe.2022.3.07
Anatolij Aleksandrovich Kazantsev, O. Supotnitskaya, E. A. Ivanova, I. V. Moskovchenko, V. Timofeev, Nataliya Eduardovna Astakhova
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引用次数: 1
期刊
Izvestiya Wysshikh Uchebnykh Zawedeniy, Yadernaya Energetika
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