Facility Description
　

　

　
　

There are two NTD holes to irradiate the silicon ingot in HANARO.  Table 1 describes the characteristics of each irradiation hole.

　


Table 1.  The characteristics of the NTD holes in HANARO

　

Hole Size
(mm)

Neutron Flux(n/㎠·s)
(At 30MW operation)

Acceptable
Ingot Diameter
(Inch)

Acceptable
Ingot Total
Length
(mm)

Irradiation
Time

NTD1

220

3.7 x 1013

6, 8

600

 about 4 hour
in case of
50 ohm-cm

NTD2

180

3.7 x 1013

5, 6

600

Figure 3 shows the irradiation rig with ingots entering into the NTD2 hole in the reflector region of HANARO. 

　


(Figure 3.  A view for the NTD rig entering into the NTD2 hole)