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Nuclear Energy Conference & Expo (NECX)
September 8–11, 2025
Atlanta, GA|Atlanta Marriott Marquis
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Fusion Science and Technology
Latest News
Deep Space: The new frontier of radiation controls
In commercial nuclear power, there has always been a deliberate tension between the regulator and the utility owner. The regulator fundamentally exists to protect the worker, and the utility, to make a profit. It is a win-win balance.
From the U.S. nuclear industry has emerged a brilliantly successful occupational nuclear safety record—largely the result of an ALARA (as low as reasonably achievable) process that has driven exposure rates down to what only a decade ago would have been considered unthinkable. In the U.S. nuclear industry, the system has accomplished an excellent, nearly seamless process that succeeds to the benefit of both employee and utility owner.
Youshan Yang, Lusheng Wang
Fusion Science and Technology | Volume 80 | Number 1 | January 2024 | Pages 55-67
Research Article | doi.org/10.1080/15361055.2023.2185045
Articles are hosted by Taylor and Francis Online.
This work aims to investigate the characteristics of the H atom in the tetrahedral interstitial sites of 8f2, 4c1, 8f1, 4c2, 8e, and 8g1 in the ZrCoH3 cell by first principles calculation based on the density functional theory. The research shows that pressure can change the local property of the electrons and the bonding ability of the H atom and its adjacent metal atoms, resulting in changes in the stable point and the disproportion point of the H atom in ZrCoH3. Further research has found that at P = 0 GPa, the significant Co-H covalent bond makes the H atom prefer to occupy the tetrahedral interstitial sites of 8f1 and 4c2 in the ZrCoH3 cell, while the H atom occupying the tetrahedral interstitial site of 4c1 in the ZrCoH3 cell has a significant Zr-H ionic bond with its adjacent Zr atom, which is the reason for the disproportionation of the ZrCoH3 alloy. When P = 10 GPa, the H atoms become unstable in the 8f1 and 4c2 tetrahedral interstices of the ZrCoH3 crystal cell. The significant Zr-H ionic bond between the H atoms in the 8f1 tetrahedral interstice and their adjacent Zr atoms is the reason for the disproportionation of the ZrCoH3 alloy, and the significant Co-H covalent bond makes the H atoms preferentially occupy the 4c1 and 8g1 tetrahedral interstices.
