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首页> 外文期刊>Progress in Nuclear Energy >Simulation of activated corrosion product activity in Korean design system-integrated modular advanced reactor (SMART) under steady-state flow and linearly accelerated corrosion
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Simulation of activated corrosion product activity in Korean design system-integrated modular advanced reactor (SMART) under steady-state flow and linearly accelerated corrosion

机译：稳态流动下韩国设计系统集成模块化高压电抗器（智能）激活腐蚀产品活动的仿真和线性加速腐蚀

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摘要

The activated corrosion products are the leading source of radiation in Nuclear Power Plants (NPPs). Particularly in advanced integrated systems with a reduction in piping and advanced safety features such as systemintegrated modular advanced reactor (SMART), the corrosion product activity is needed to be investigated. In this work, simulation of corrosion product activity has been evaluated for the SMART reactor under normal and shutdown conditions and compared with a typical Pressurized Water Reactor (PWR). For this purpose, a computer code ACP-SMART has been developed and implemented in MATLAB, which uses OpenMC as a subroutine. The effective group cross-section has been generated by OpenMC under the core design constraints. The results for 56Mn, 59Fe, 24Na, 99Mo, 58Co, and 60Co have been found as 0.072 ?Ci/cm3, 0.240 ?Ci/cm3, 0.290 ?Ci/cm3, 0.360 ?Ci/cm3, 0.015 ?Ci/cm3, and 0.020 ?Ci/cm3, respectively. The total specific activity due to corrosion products in the core, primary coolant, and inside the steam generator is 2.790 ?Ci/cm3, 0.183 ?Ci/cm3, and 0.145 ?Ci/cm3, respectively, which are 89.5%, 5.8%, and 4.7% of the overall contribution. Results indicate that the primary coolant and steam generator specific activity reach their saturation values fairly rapidly. Predominant corrosion product activity during normal operation is due to 56Mn while 58Co and 59Fe dominate after reactor shutdown. 99Mo remains dominant to 24Na and 59Fe during normal operation while 59Fe leads over 99Mo and 24Na after shutdown. A linearly increasing corrosion rate has been employed, and an effect on saturation activity has been investigated. For the linearly increasing corrosion rate, the specific activity behavior has changed considerably. The time taken to reach the saturation activity strongly depends upon the corrosion rate. The saturation activity in the primary coolant and steam generator depends on the CRUD removal rate from the core scale.
机译：活性腐蚀产品是核电厂（NPPS）中辐射的主要源。特别是在先进的集成系统中，具有减少管道和先进的安全性功能，如系统集成模块化高级电抗器（智能），需要进行腐蚀产品活动。在这项工作中，已经在正常和关断条件下对智能反应器进行了腐蚀产品活性的模拟，并与典型的加压水反应器（PWR）相比。为此目的，在Matlab中开发和实现了计算机代码ACP-Smart，它使用OpenMC作为子程序。有效的组横截面已由OpenMC在核心设计约束下生成。已发现56Mn，59Fe，24na，99mO，58co和60co的结果为0.072？ci /cm3,0.240≤ci/ cm3，0.290？ci / cm3，0.360？ci / cm3,0.015？ci / cm3，和0.020？CI / cm3分别。由于核心，初级冷却剂和蒸汽发生器内部的腐蚀产品引起的总特定活动是2.790？CI / cm3，0.183？CI / cm3和0.145？CI / CM3，分别为89.5％，5.8％，占整体贡献的4.7％。结果表明，初级冷却剂和蒸汽发生器特异性活动相当迅速地达到饱和值。正常操作期间的主要腐蚀产品活动是由于56Mn，58Co和59Fe在反应器关闭后主导地位。 99Mo在正常运行期间占24纳和59Fe的占主导地位，而关闭后59Fe会超过99Mo和24NA。已经采用线性增加的腐蚀速率，研究了对饱和活性的影响。为了线性增加腐蚀速率，特定的活动行为发生了很大变化。达到饱和度活动所需的时间依赖于腐蚀速率。初级冷却剂和蒸汽发生器中的饱和度活性取决于来自核心尺度的Crud移除速率。

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