Evaluation of HYLIFE-II and Sombrero using 175- and 566-group neutron transport and activation cross sections

Latkowski, Jeffery F.; Cullen, D.E.; Sanz, J.

doi:10.1016/s0920-3796(00)00218-0

Cited by 2 publications

(1 citation statement)

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“…For those fusion reactors, one-dimensional models have been employed to perform simple neutronics calculations. [16][17][18] In order to choose an appropriate model for the present study, one-dimensional spherical, cylindrical and poloidal models are compared about mainly the (n; 2n) reaction in 232 Th. The poloidal model is frequently used for the Tokamak fusion reactors.…”

Section: Spherical Model Employed In Present Studymentioning

confidence: 99%

Production of Pa-U Fuel with Proliferation Resistance by 14 MeV Neutron for Long-life Core

Imamura

Saito

Yoshida

et al. 2004

J. Nucl. Sci. Technol.

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Protactinium-231 has an attractive potential to reduce the initial excess-reactivity and to be effectively converted to the fissile nuclide 233 U through 232 U. Thus, 231 Pa serves as the burnable fertile material helping to achieve a long-life core. However, the natural abundance of 231 Pa is negligible. Therefore, the production of 231 Pa has been studied in a fusion blanket with a ThO 2 zone, which is irradiated by 14 MeV neutrons to cause the (n; 2n) reaction in 232 Th at a neutron wall load of 1 MW/m 2 . The mass balance of 231 Pa shows that the one fusion reactor with approximately 1.1 GW th and 195 t of ThO 2 supports the one pebble bed-type gas cooled reactor with approximately 1 GW th and 10-year lifetime (700 GWD/t). It is also shown that the attractive fertile nuclide 231 Pa is produced with a fissile nuclide 233 U and a small fraction of 232 U which enhances the proliferation resistance for the fissile product 233 U due to the generation of high decay heat and strong gamma rays. In the present study, the isotopic fraction of 232 U is increased to over 2.4% by controlling the neutron spectrum in the ThO 2 zone. As a result, the fissile nuclide 233 U could be always protected by 232 U throughout the thorium fuel cycle based on 231 Pa.

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Section: Spherical Model Employed In Present Studymentioning

confidence: 99%