Nagothi Bhavani Sasank, Qu Haozheng, Zhang Wanming, Umretiya Rajnikant V, Dolley Evan, Rebak Raul B
General Electric Research Center, 1 Research Circle, Schenectady, NY 12309, USA.
College of Nanotechnology, Science, and Engineering, University at Albany, Albany, NY 12203, USA.
Materials (Basel). 2024 Apr 3;17(7):1633. doi: 10.3390/ma17071633.
After the Fukushima nuclear disaster, the nuclear materials community has been vastly investing in accident tolerant fuel (ATF) concepts to modify/replace Zircaloy cladding material. Iron-chromium-aluminum (FeCrAl) alloys are one of the leading contenders in this race. In this study, we investigated FA-SMT (or APMT-2), PM-C26M, and Fe17Cr5.5Al over a time period of 6 months in simulated BWR environments and compared their performance with standard Zirc-2 and SS316 materials. Our results implied that water chemistry along with alloy chemistry has a profound effect on the corrosion rate of FeCrAl alloys. Apart from SS316 and Zirc-2 tube specimens, all FeCrAl alloys showed a mass loss in hydrogen water chemistry (HWC). FA-SMT displayed minimal mass loss compared to PM-C26M and Fe17Cr5.5Al because of its higher Cr content. The mass gain of FeCrAl alloys in normal water chemistry (NWC) is significantly less when compared to Zirc-2.
福岛核灾难发生后,核材料领域一直在大力投入研发事故容错燃料(ATF)概念,以改进/替代锆合金包壳材料。铁铬铝合金(FeCrAl)是这场竞争中的主要竞争者之一。在本研究中,我们在模拟沸水反应堆(BWR)环境中对FA-SMT(或APMT-2)、PM-C26M和Fe17Cr5.5Al进行了为期6个月的研究,并将它们的性能与标准锆-2和SS316材料进行了比较。我们的结果表明,水化学以及合金化学对FeCrAl合金的腐蚀速率有深远影响。除了SS316和锆-2管试样外,所有FeCrAl合金在氢水化学(HWC)中都出现了质量损失。由于FA-SMT的铬含量较高,与PM-C26M和Fe17Cr5.5Al相比,其质量损失最小。与锆-2相比,FeCrAl合金在正常水化学(NWC)中的质量增加明显较少。