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Neutronic characteristics of an OTTO refueling PBMR

Hoai Nam Tran (Institutionen för teknisk fysik, Nukleär teknik) ; Van Khanh Hoang
Nuclear Engineering and Design (0029-5493). Vol. 253 (2012), p. 269-276 .
[Artikel, refereegranskad vetenskaplig]

Neutronic characteristics were investigated for a once-through-then-out (OTTO) refueling scheme based on the 400 MWt pebble bed modular reactor (PBMR) and compared with that of a reference multi-pass scheme. The core was loaded with new fuel pebbles which were designed with Gd2O3 particles to flatten the axial power profile. The Gd2O3 design was considered in a multi-parameter optimization to maximize the average discharged burnup while maintaining a limited power peak and ensuring core criticality. The results show that the OTTO scheme using the new fuel pebbles can achieve the maximum average discharged burnup of about 75 GWd/t, at which the core neutronic characteristics are comparable with that of the reference multi-pass scheme. This means that the efficiency of fuel utilization of the OTTO scheme is about 21% less than that of the multi-pass scheme (95 GWd/t).

Nyckelord: PBMR, OTTO, refueling, power profile, burnup

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Denna post skapades 2013-02-18. Senast ändrad 2013-03-04.
CPL Pubid: 173759


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Institutionen för teknisk fysik, Nukleär teknik (2006-2015)



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