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NRC looks to leverage previous approvals for large LWRs
During this time of resurging interest in nuclear power, many conversations have centered on one fundamental problem: Electricity is needed now, but nuclear projects (in recent decades) have taken many years to get permitted and built.
In the past few years, a bevy of new strategies have been pursued to fix this problem. Workforce programs that seek to laterally transition skilled people from other industries, plans to reuse the transmission infrastructure at shuttered coal sites, efforts to restart plants like Palisades or Duane Arnold, new reactor designs that build on the legacy of research done in the early days of atomic power—all of these plans share a common throughline: leveraging work already done instead of starting over from square one to get new plants designed and built.
T. Hayashi, T. Suzuki, W. M. Shu, T. Yamanishi
Fusion Science and Technology | Volume 52 | Number 3 | October 2007 | Pages 706-710
Technical Paper | The Technology of Fusion Energy - Tritium, Safety, and Environment | doi.org/10.13182/FST07-A1573
Articles are hosted by Taylor and Francis Online.
In order to establish a proper control method of the DT fuel isotope balance in ITER, isotopic composition of hydrogen, which was released rapidly from the metal hydride bed by vacuum pump, was investigated using a ZrCo bed (1/10 scale of ITER fuel storage & delivery system) as functions of initially stored H/D ratio and temperature. The equilibrium pressure (P) of hydrogen - metal system has large isotope effect such as PH2 < PD2 < PT2 for ZrCo, however, the difference of H,D isotope fractions was within about 5%, during rapid delivery of about 90% hydrogen gases at 623 K and initial H:D of 1:1. In cases of initial H:D of 9:1 or 1:9, the differences of H,D isotope fractions were rather small of a few %. Even if the fluctuation of the isotope ratio is less than 5%, depending on the requirements from plasma physics experiments and fuel accountancy of tritium plant, batch fuel delivery from adequate gas tanks after isotope composition adjustment will be preferable to direct rapid delivery from storage bed.
