Production and transport modelling of Po-210 in DEMO reactor

被引：2

作者：

Chiovaro, P. ^{[1
]}

Quartararo, A. ^{[1
]}

Basile, S. ^{[1
]}

Ciattaglia, S. ^{[2
]}

Di Maio, P. A. ^{[1
]}

Moro, F. ^{[3
]}

Moscato, I ^{[1
,2
]}

Spagnuolo, G. A. ^{[2
]}

机构：

[1] Univ Palerm, Dept Engn, Viale Sci,Ed 6, I-90128 Palermo, Italy

[2] EUROfus Consortium, Fus Technol Dept, Programme Management Unit, Boltzmannstr 2, D-85748 Garching, Germany

[3] ENEA CR Frascati, Dept Fus & Technol Nucl Safety & Secur, Via E Fermi 45, I-00044 Rome, Italy

来源：

NUCLEAR FUSION | 2022年 / 62卷 / 05期

关键词：

neutronics; fluid-dynamics; breeding blanket; Po-210; DEMO; DESIGN; BLANKETS;

D O I：

10.1088/1741-4326/ac548a

中图分类号：

O35 [流体力学]; O53 [等离子体物理学];

学科分类号：

070204 ; 080103 ; 080704 ;

摘要：

One of the generic designs of the nuclear fusion DEMO reactor proposed by the EUROfusion consortium foresees the development of a tritium breeding blanket (BB) relying on the use of the liquid-metal PbLi eutectic alloy as both neutron multiplier and tritium breeder, namely the water-cooled lithium lead (WCLL) BB, whose strengths and weaknesses are well known. This paper focuses the attention on one of the possible disadvantages of such a technology: the production of the highly radiotoxic radionuclide Po-210, which could become a safety issue to be accounted for. The Po-210 concentration within the PbLi circuit has been assessed by solving a modified version of Bateman's equations to consider the alloy circulation, so a one-dimensional convective fluid-dynamic model has been set up. Nuclear quantities have been evaluated by Monte Carlo neutron transport analyses using MCNP code and adopting a fully heterogeneous model of DEMO equipped with the WCLL BB. Moreover, rough sensitivity analyses have been performed to assess the influence on the results of the uncertainties related to the Bi-209 radiative-capture cross section and the initial concentration of this nuclide which is present in the PbLi as an impurity. Results obtained have been critically discussed and some safety issues have been addressed to evaluate the possible hazard in case of a leak of PbLi accident.

引用

页数：11

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