• Title/Summary/Keyword: nuclear division

Search Result 2,106, Processing Time 0.039 seconds

A new burn-up module for application in fuel performance calculations targeting the helium production rate in (U,Pu)O2 for fast reactors

  • Cechet, A.;Altieri, S.;Barani, T.;Cognini, L.;Lorenzi, S.;Magni, A.;Pizzocri, D.;Luzzi, L.
    • Nuclear Engineering and Technology
    • /
    • v.53 no.6
    • /
    • pp.1893-1908
    • /
    • 2021

  • In light of the importance of helium production in influencing the behaviour of fast reactor fuels, in this work we present a burn-up module with the objective to calculate the production of helium in both in-pile and out-of-pile conditions tracking the evolution of 23 alpha-decaying actinides. This burn-up module relies on average microscopic cross-section look-up tables generated via SERPENT high-fidelity calculations and involves the solution of the system of Bateman equations for the selected set of actinide nuclides. The results of the burn-up module are verified in terms of evolution of actinide and helium concentrations by comparing them with the high-fidelity ones from SERPENT, considering two representative test cases of (U,Pu)O2 fuel in fast reactor conditions. In addition, a code-to-code comparison is made with the independent state-of-the-art module TUBRNP (implemented in the TRANSURANUS fuel performance code) for the same test cases. The herein presented burn-up module is available in the SCIANTIX code, designed for coupling with fuel performance codes.

  • https://doi.org/10.1016/j.net.2020.12.001 인용 PDF KSCI

Effect of serrated grain boundary on stress corrosion cracking of Alloy 600

  • Kim, H.P.;Choi, M.J.;Kim, S.W.;Kim, D.J.;Lim, Y.S.;Hwang, S.S.
    • Nuclear Engineering and Technology
    • /
    • v.50 no.7
    • /
    • pp.1131-1137
    • /
    • 2018

  • The effect of a serrated grain boundary on stress corrosion cracking (SCC) of Alloy 600 was investigated in terms of improvement of SCC resistance. Serrated grain boundaries and straight grain boundaries were obtained by controlled heat treatment. SCC cracks preferentially initiated and grew at grain boundaries normal to the tensile loading axis. Resolved tensile stress normal to the grain boundary was lower in serrated grain boundaries compared to straight grain boundaries. The specimen with serrated grain boundaries showed higher SCC resistance than that with straight grain boundaries due to a lower resolved tensile stress normal to the grain boundary.

  • https://doi.org/10.1016/j.net.2018.05.009 인용 PDF KSCI