On the feasibility of a homogenised multi-group Monte Carlo method in reactor analysis

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    he use of homogenised multi-group cross sections to speed up Monte Carlo calculation has been studied to some extent, but the method is not widely implemented in modern calculation codes. This paper presents a calculation scheme in which homogenised material parameters are generated using the PSG continuous-energy Monte Carlo reactor physics code and used by MORA, a new full-core Monte Carlo code entirely based on homogenisation. The theory of homogenisation and its implementation in the Monte Carlo method are briefly introduced. The PSG-MORA calculation scheme is put to practice in two fundamentally different test cases: a small sodium-cooled fast reactor (JOYO) and a large PWR core. It is shown that the homogenisation results in a dramatic increase in efficiency. The results are in a reasonably good agreement with reference PSG and MCNP5 calculations, although fission source convergence becomes a problem in the PWR test case.
    Original languageEnglish
    Title of host publicationInternational Conference on the Physics of Reactors 2008 (PHYSOR 08)
    EditorsRakesh Chawla, Vinh N. Dang, Konstantin Mikityuk
    PublisherPaul Scherrer Institut
    Number of pages8
    ISBN (Electronic)978-3-9521409-5-6
    ISBN (Print)978-1-61782-121-9
    Publication statusPublished - 2008
    MoE publication typeA4 Article in a conference publication


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