Estimations of the effect of alpha particles on a refuelling pellet

C.T. Chang, Hans Pécseli

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    Abstract

    The effect of the α-particle from the D(T,n)a reaction on a 3 mm solid deuteriur. pellet was studied by disregarding the optimum of the refuelling process and limiting attention to the feasibility of pellet refuelling alone. A comparison of the
    refuelling period required with the slowing-down time of the α-particle in a D+,e plasma corresponding to a 2.5 GW(e) reactor showed that the pellet is first subjected to the direct impact of a-particles of around 2-3 MeV energy. The penetration depth of these particles in the pellet is comparable to that of a 20 keV electron. If the temperature of the ablated cloud created around the pellet is about 1 eV, a cloud radius of about 20 cm is required for the subsequent thermalization of the α-particles.
    Original languageEnglish
    Place of PublicationRoskilde, Denmark
    PublisherRisø National Laboratory
    Number of pages19
    ISBN (Print)87-550-0530-6
    Publication statusPublished - 1978
    SeriesDenmark. Forskningscenter Risoe. Risoe-R
    Number378
    ISSN0106-2840

    Keywords

    • Risø-R-378
    • Risø-378
    • Risø report 378

    Cite this

    Chang, C. T., & Pécseli, H. (1978). Estimations of the effect of alpha particles on a refuelling pellet. Risø National Laboratory. Denmark. Forskningscenter Risoe. Risoe-R, No. 378