Determination of Deuterium Pick-Up in Zr-Nb Alloy by Hot Vacuum Extraction-Quadrupole Mass Spectrometry
Determination of Deuterium Pick-Up in Zr-Nb Alloy by Hot Vacuum Extraction-Quadrupole Mass Spectrometry
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DOI：
10.1080/00032719.2012.684119
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发表时间：
2012-04
影响因子：
2
通讯作者：
K. Chandra;P. S. Ramanjaneyulu;C. Yadav;A. S. Kulkarni;Y. S. Sayi;K. L. Ramakumar
中科院分区：
文献类型：
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作者：
K. Chandra;P. S. Ramanjaneyulu;C. Yadav;A. S. Kulkarni;Y. S. Sayi;K. L. Ramakumar
锆合金被核工业广泛用作反应堆堆芯部件。在加压重水反应堆（PHWR）中，锆铌合金压力管（也称为冷却剂通道）与D2 O一起用作主要的传热流体。由于反应堆内压力管的连续使用，可能发生由于腐蚀反应而导致的氘大量进入压力管中，从而导致氢（或氘）脆化。因此，老化管理要求对该氘吸收率进行量化，以便采取补救措施，使反应堆平稳运行。为此目的，热真空萃取-四极杆质谱（HVE-QMS）技术已在我们的实验室开发。实验条件，如温度，时间的提取释放的气体，和测量方法进行了优化。灵敏度因子已被推导出定量的分析结果。该方法的精密度为10%。此外，还详细研究了QMS中氢（或氘）分子离子（）的形成与测量系统压力的关系及其对测量结果的可能影响。
Zirconium alloys are used extensively by the nuclear industry as reactor core components. In pressurized heavy water reactors (PHWRs) zirconium-niobium alloy pressure tubes (also called coolant channels) are used with D2O as the primary heat transport fluid. Due to continuous usage of the pressure tubes inside the reactor, heavy ingress of deuterium into the pressure tubes due to corrosion reactions could occur resulting in hydrogen (or deuterium) embrittlement. Aging management therefore requires that this deuterium pick-up rate should be quantified for the remedial measures to be taken for the smooth operation of the reactor. For this purpose, a hot vacuum extraction-quadrupole mass spectrometry (HVE-QMS) technique has been developed in our laboratory. Experimental conditions like temperature, time of extraction of liberated gases, and measurement methodology have been optimized. Sensitivity factors have been derived for quantification of analytical results. Precision of the methodology was found to be 10%. Also, detailed studies have been carried out on the formation of hydrogen (or deuterium) molecular ion ( ) in QMS as a function of pressure in the measurement system and its possible effect on the results.