Load-Follow Operation in LEU+ loaded very-low soluble boron APR1400

IF 3.3 3区工程技术 Q1 NUCLEAR SCIENCE & TECHNOLOGY

Progress in Nuclear Energy Pub Date : 2024-09-05 DOI:10.1016/j.pnucene.2024.105415

Husam Khalefih, Yonghee Kim

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引用次数: 0

Abstract

This study explores the effectiveness of the mode-K+ strategy in managing a Very-Low Soluble Boron (VLSB) APR1400 core, loaded with LEU + fuel, and utilizing the Centrally-Shielded Burnable Absorber (CSBA) and erbia for excess reactivity control. Initially, a 24-month two-batch fuel management scheme was developed, targeting an equilibrium cycle Burnup (BU) of 26 GWD/MTU. The scheme required a maximum of ∼550 ppm Critical Boron Concentration (CBC) in the early cycle BU. Analysis of radial and axial power profiles revealed that the power peaking factors remained within acceptable limits, with values not exceeding 1.4 and 1.6 throughout the cycle, respectively. Subsequently, various Daily Load-Follow Operation (DLFO) scenarios were examined at different BU levels. These investigations demonstrated a consistent alignment between the demanded power and the reactor's power output. Furthermore, critical safety parameters, including the Axial Shape Index (ASI) and inlet coolant temperature, consistently remained within prescribed design specifications. The study's findings underscore the feasibility and reliability of implementing a VLSB APR1400 core with LEU + fuel, using mode-K+ and advanced fuel management strategies for effective power generation and safety compliance. To perform the analysis, an in-house diffusion code KANT was utilized, KANT is based on NEM-CMFD accelerated simulation tool, while the cross-section was generated via Serpent 2.2.0 assessed with ENDF VII.B data library.

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LEU+ 装载极低溶解度硼 APR1400 中的负载跟踪运行

本研究探讨了 K+ 模式战略在管理装有 LEU + 燃料的甚低可溶性硼（VLSB）APR1400 堆芯方面的有效性，并利用中央屏蔽可燃吸收器（CSBA）和 erbia 控制过剩反应性。最初，制定了一个为期 24 个月的两批燃料管理计划，目标是使平衡循环燃耗（BU）达到 26 GWD/MTU。该方案要求早期循环燃耗（BU）中临界硼浓度（CBC）不超过 550 ppm。对径向和轴向功率曲线的分析表明，功率峰值系数保持在可接受的范围内，在整个周期内分别不超过 1.4 和 1.6。随后，在不同的 BU 水平上对各种 "每日负载跟随运行"（DLFO）方案进行了研究。这些研究表明，需求功率与反应堆输出功率之间保持一致。此外，包括轴向形状指数（ASI）和入口冷却剂温度在内的关键安全参数始终保持在规定的设计规格范围内。研究结果突出表明，采用低浓铀+燃料的 VLSB APR1400 堆芯，利用模式-K+和先进的燃料管理策略来实现有效发电和安全合规，是可行且可靠的。为了进行分析，使用了内部扩散代码 KANT，KANT 基于 NEM-CMFD 加速模拟工具，而横截面则通过 Serpent 2.2.0 生成，并使用 ENDF VII.B 数据库进行评估。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Progress in Nuclear Energy 工程技术-核科学技术

CiteScore

5.30

自引率

14.80%

发文量

331

审稿时长

3.5 months

期刊介绍： Progress in Nuclear Energy is an international review journal covering all aspects of nuclear science and engineering. In keeping with the maturity of nuclear power, articles on safety, siting and environmental problems are encouraged, as are those associated with economics and fuel management. However, basic physics and engineering will remain an important aspect of the editorial policy. Articles published are either of a review nature or present new material in more depth. They are aimed at researchers and technically-oriented managers working in the nuclear energy field. Please note the following: 1) PNE seeks high quality research papers which are medium to long in length. Short research papers should be submitted to the journal Annals in Nuclear Energy. 2) PNE reserves the right to reject papers which are based solely on routine application of computer codes used to produce reactor designs or explain existing reactor phenomena. Such papers, although worthy, are best left as laboratory reports whereas Progress in Nuclear Energy seeks papers of originality, which are archival in nature, in the fields of mathematical and experimental nuclear technology, including fission, fusion (blanket physics, radiation damage), safety, materials aspects, economics, etc. 3) Review papers, which may occasionally be invited, are particularly sought by the journal in these fields.