“…e plate-type fuel with the uranium density of 3 gU/cm 3 was also used in the MPRR design with the power of 20 MW for achieving high neutron fluxes at irradiation channels [5]. Several designs of MPRRs include the OPAL reactor (20 MW) in Australia [9,10], the CARR reactor (60 MW) in China, the RA-10 reactor (30 MW) in Argentina [11], the HFIR reactor (85 MW) in USA, the FRM-II reactor (20 MW) in Germany [12], the HANARO reactor (30 MW) in Korea [13,14], JRR-3M (20 MW) in Japan, the RMB reactor (30 MW) in Brazil [15], and the JRTR reactor (5 MW) in Jordan [16]. A comparison among several MPRRs shows that the FRM-II reactor achieves the highest thermal flux per unit power with a maximum thermal neutron flux of 8 × 10 14 n•cm −2 •s −1 [6].…”