International Journal of Nuclear Energy / 2013 / Article / Tab 4

Research Article

A Small-Sized HTGR System Design for Multiple Heat Applications for Developing Countries

Table 4

Design specification of HTR50S core for the 1st step of phase I.

Layer 235U enrichment (wt%) Burnable poison (BP) specifications  
Upper: diameter (mm)  
Lower: natural boron concentration (wt%)
Fuel region*1
12341234

1st6.56.58.78.7NA*2NA*2NA*2NA*2
2nd6.56.58.78.718.0
2.5
18.0
2.5
18.0
2.5
18.0
2.5
3rd4.64.66.56.513.0
2.5
13.0
2.5
18.0
2.5
18.0
2.5
4th4.64.66.56.513.0
2.5
13.0
2.5
18.0
2.5
18.0
2.5
5th4.64.64.64.613.0
2.5
13.0
2.5
13.0
2.5
13.0
2.5
6th4.64.64.64.613.0
2.5
13.0
2.5
13.0
2.5
13.0
2.5

Shown in Figure 2.
Not installed.