共查询到17条相似文献,搜索用时 31 毫秒
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本文调研分析压水堆核电厂液态流出物中排放55Fe的来源、排放的统计参考值和55Fe的分析方法,提出开展核电厂液态流出物中55Fe监测的建议。统计分析了美国41座压水堆核电厂在2005~2017年液态流出物中55Fe的排放量,其发电量归一化排放量的几何平均值范围为5.18×10-6~8.14×10-5 GBq/GWh,所有压水堆电厂液态流出物中55Fe排放量的几何平均值为1.52×10-5 GBq/GWh,各年度55Fe排放量在液态流出物中占比在12%以上,排第1至第4位。根据我国典型压水堆核电厂液态流出物排放体积,估算了液态流出物中55Fe的排放浓度,约10.7 Bq/L。建议推进核电厂液态流出物中55Fe监测方法的建立和完善。通过对55Fe监测方法的调研,推荐采用固相萃取树脂的快速分析方法。 相似文献
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实现液态流出物在核电厂的复用,进而减少液态流出物向环境的排放,不仅对于保护水资源环境具有重要意义,而且对于满足能源发展规划和厂址选址的主要安全要求、但受环境水体条件限制液态流出物排放的内陆核电厂址,可能将是一种必须的选择。本文基于压水堆核电厂设计及运行经验,研究液态流出物复用的可行性。结果表明,液态流出物中的洗衣废水在热洗衣房循环利用,地面排水作为乏燃料水池补水复用于反应堆换料水池和乏燃料水池冷却和处理系统具备可行性;结合压水堆核电厂实际运行经验,复用后双机组每年可减少液态流出物向环境排放达8 400 m3,占液态流出物总量的51.8%;除氚、C-14外核素排放减少量4.8×105 Bq,占液态流出物除氚、C-14外核素总量的36.9 %。 相似文献
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关于核设施放射性流出物导出排放限值的讨论 总被引:1,自引:1,他引:0
本文简要描述了计算导出排放限值的方法 ,并结合秦山核电厂址气态流出物的排放情况 ,讨论了关于导出排放限值的几个问题。 相似文献
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Tae Young Kong Siyoung Kim Youngju Lee Jung Kwon Son 《Journal of Nuclear Science and Technology》2019,56(8):764-769
Korean pressurized water reactors (PWRs) generally use radioactive effluent monitors for monitoring the concentration of radioactive effluents released to the environment. In this study, the operating margins for radioactive effluent monitors were analyzed to determine the levels of real-time concentration of effluents compared to effluent control limits (ECLs), the regulatory limits. The results show that the concentration of radioactive effluents released from Korean PWRs complied with the ECLs during the years 2012–2016. It was also found that outages at Korean PWRs did not impact the operating margins for radioactive effluent monitors; that is, there was no remarkable difference of the concentration of effluents between normal operation and maintenance periods. In terms of simultaneous effluent releases, the results demonstrate that exceeding the ECLs is unlikely to occur even under the hypothetical condition of coincident effluent releases from multiple discharge points at a Korean PWR. 相似文献
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压水堆核电站运行状态下气液态放射性流出物源项计算研究 总被引:1,自引:1,他引:0
压水堆核电站运行状态下气液态放射性流出物源项为环境影响评价的源头。通过对压水堆核电站运行状态下气液态放射性流出物的释放途径及其计算基准的研究,得出了各类型压水堆核电站通用的运行状态下气液态放射性流出物源项计算模型,并分析讨论了主要的影响因素。根据建立的计算模型,采用CPR1000机型的设计参数,计算了CPR1000机型气液态放射性流出物源项预期值,并与大亚湾和岭澳核电站实测值进行了比较。比较结果表明,模型计算结果可包络实测值,计算模型具有一定的保守性。 相似文献
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本文介绍一种新型压力释放装置,该装置兼顾了现有压水堆压力安全系统中使用的弹簧直接作用式安全阀和波纹管先导式安全阀这两种压力释放装置的优点。该阀门具有释放可信度高、可靠性好、密封性好和工作平稳等优点。为验证该装置的实际工作性能的可靠性和可信度,在15.5 MPa工作压力下,对新型压力释放装置进行热态实验,通过实验得出该装置的密封特性和动作特性曲线,证明该装置工作性能良好。新型压力释放装置对现有压水堆压力安全系统的改进提供了一种新思路,同时其验证性实验为该装置在未来的实际应用积累了经验。 相似文献
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A. Puill J. Bergeron M. Rohart S. Aniel-Buchheit A. Bergeron P. Matheron 《Progress in Nuclear Energy》2001,38(3-4):403-406
A new assembly concept, designated APA (for dvanced lutonium fuel ssembly), should make it possible to multi-recycle plutonium in pressurized water reactors. The basic idea is founded on the manufacture of a large plutonium thin annular fuel rod with an inert support, cooled on both faces. The absence of plutonium generation, combined with moderate fuel temperature should make it possible to achieve substantial burn-up fractions in these rods. The assembly is compatible with the internals of a Pressurized Water Reactor (PWR), and provides for permanent reversibility. Neutronic studies showed a compliance with actual safety/control criteria. A multi-recycling scenario was simulated for 84 years' operation with a 65 GW electrical power installed capacity, comprising forty-five 1450 MW electrical power PWRs, 32 of which are loaded with UO2 and 13 with APAs. It showed that the plutonium inventory is controlled. Thermal-hydraulic studies showed one can find an annular rod geometry allowing one to respect both margins to Critical Heat Flux (CHF) during normal and accidental operations and void fraction limitations. 相似文献