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NRC Hanson's renomination clears Senate committee
Hanson
The U.S. Senate Environment and Public Works Committee voted 18–1 yesterday to advance the renomination of Christopher T. Hanson as a member of the Nuclear Regulatory Commission. Hanson has been a commissioner since 2020, and was named chair by President Biden in January 2021. The full U.S. Senate will consider Hanson’s nomination later this month.
Voices of support: “Chair Hanson is a dedicated public [servant] who has thoughtfully and . . . skillfully led the [NRC] during his tenure as its chair. Throughout his time on the[NRC], he has demonstrated his commitment to ensuring the safety and the security of our nation’s use of nuclear energy,” said EPW committee chair Tom Carper (D., Del.) before the vote.
Francesco Scaffidi-Argentina, Mario Dalle Donne, Claudio Ronchi, Claudio Ferrero
Fusion Science and Technology | Volume 32 | Number 2 | September 1997 | Pages 179-195
Technical Paper | Blanket Engineering | doi.org/10.13182/FST97-A19890
Articles are hosted by Taylor and Francis Online.
A mechanistic model for the description of helium swelling and tritium release in neutron-irradiated beryllium is presented. Initially aimed at predicting the mechanical stability and the tritium retention capacity of beryllium in a fusion reactor blanket, the ANFIBE code was finally extended to provide an exhaustive description of the properties of this material under fast neutron irradiation. In-solid diffusion and precipitation of helium and tritium, radiation re-solution, and bubble growth and coalescence in different structural domains of the material are taken into account and formulated in a compact rate equation system, enabling the evolution of swelling and release to be calculated under stationary and nonstationary irradiation and temperature conditions. A particular feature of the model is the treatment of the growth of gas bubbles and pores in the interactive compressive stress field created by the gas precipitated in cavities of different sizes and at different pressures, enabling a realistic and accurate calculation of the stress-sensitive intergranular-swelling components and of the related pore-venting effects. The salient physical hypotheses of the model are discussed, as well as the formalism adopted for the description of helium and tritium diffusion precipitation and swelling.