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控制棒驱动机构(CRDM)检修及堆芯换料时都需要多次拆卸CRDM的耐压壳体,为解决现有耐压壳体Ω密封焊缝泄漏以及不能多次拆卸的问题,本文采用螺母压紧石墨环方案,利用石墨环的压缩回弹性能防止冷却剂泄漏,并设计一种石墨环密封组件实现快速拆卸;通过开展密封环压缩回弹测试、应力松弛测试以及密封组件泄漏率等密封性能测试试验对石墨环密封组件的密封性能进行验证。结果表明,本文设计的石墨环密封环组件满足设计要求,可以实现高温高压环境下的密封性能。 相似文献
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岭澳核电厂L1号机组控制棒驱动机构泄漏问题 总被引:2,自引:0,他引:2
介绍了岭澳核电厂L1号机组控制棒驱动机构上部Ω密封焊缝区域泄漏事件及其处理措施,对泄漏的原因进行了初步分析,并简单介绍了广东核与辐射安全监督站对该事件的监督活动. 相似文献
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以岭澳核电站控制棒驱动机构耐压壳Ω环焊接修复为例,应用ANSYS有限元生死单元技术模拟焊接流程,计算出焊接后残余应力的分布,绘制出残余应力分布曲线,并与美国WSI公司的计算结果进行对比分析.结果表明,本课题的计算结果与美国焊接公司(WSI公司)一致.因此,焊接残余应力有限元分析技术可以用于反应堆耐压壳焊接修复评价. 相似文献
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Yu. B. Kurdyaev 《Atomic Energy》2000,88(2):88-93
The problem of determining the parameters of the field of a cylindrical absorbing radiator in the direction of the generator
was solved for the case where the detection point lies outside the cylindrical surface of the radiator. A program of integrating
the expression obtained numerically was developed. The results of calculations of the position of the dose rate isolines were
presented for two radiators with relative heights 1 and 10. The maximum error was determined for the chosen numerical integration
parameters relative to the exact solution: this error was found to be no greater than 2% for the interval of relative heights
of the radiator 0.01–10. It was shown that the proposed scheme for obtaining the integral expression is much mor accurate
than the scheme used previously for calculation of the parameters of the field in a range falling within the height of the
radiator, 5 figures, 5 references.
Affiliate of the North-West Civil Service Academy. Translated from Atomnaya énergiya, Vol. 88, No. 2, pp. 88–92. 相似文献
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