Study on Application of Enriched Boric in Primary Coolant of Nuclear Power Plants
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摘要: 随着压水堆核电厂逐渐向长周期燃料循环转变,堆芯功率密度不断提高,燃耗不断加深,一回路冷却剂水化学控制也变得更为复杂和困难。对核电厂一回路富集硼水化学进行计算分析,结果表明富集硼酸的使用,可降低冷却剂硼浓度,提高p H值;10B富集度在40%以上的富集硼酸能维持堆芯运行于p H值7.2～7.4。Abstract: Nuclear power plants gradually adopt the long-term fuel cycle, the power density of the reactors is increasing and the level of burnup is higher. It is more complex and difficult to control the primary coolant chemistry. The water chemistry of enriched boric acid in primary coolant was calculated. Results show that the use of EBA for 40% enrichment can reduce the initial concentration of boron and improve the p H value of primary coolant, enabling the core of reactor to operate at p H300℃7.2 to 7.4.
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Key words:
- Reactor coolant /
- Enriched boric acid /
- Boron isotopes /
- Primary coolant chemistry /
- Corrosion /
- Coordinated control
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