7 Neutronics of Lead and Bismuth
183
(a) Test fuel rod “b” containing Pb plates (Ref. [1])
(b) Test fuel rod “b” containing Bi plates (Ref. [3])
Polyethylene
(10.0”p 2)
(20”)
10 times
(2.5”)
1/8”p
(1/8”)
1/16” EU 2
(1/8”)
20 mm Al plate
1/8”p 4
(1/2“)
Reflector (21.29”)
(Lower)
Fuel (15”)
(Unit cell 60 times)
Reflector (23.71”)
(Upper)
1/16” EU 2
(1/8”)
1/8”Pb
(1/8”)
40 times
(10”)
10 times
(2.5”)
1/16” EU 2
(1/8”)
1/8”p
(3.18 mm)
Polyethylene
(10.0”p 2)
(20”)
Polyethylene
(10.0”p 2)
(20”)
10 times
(2.5”)
1/8”p
(1/8”)
1/16” EU 2
(1/8”)
20 mm Al plate
1/8”p 4
(1/2“)
Reflector (21.29”)
(Lower)
Fuel (15”)
(Unit cell 60 times)
Reflector (23.71”)
(Upper)
1/16” EU 2
(1/8”)
1/8”Pb
(1/8”)
40 times
(10”)
10 times
(2.5”)
1/16” EU 2
(1/8”)
1/8”p
(3.18 mm)
Polyethylene
(10.0”p 2)
(20”)
Fig. 7.6 Schematic drawing of test fuel rods
Fig. 7.7 Comparison
between the neutron spectra
of HEU-Pb test zone in
KUCA and LBE-cooled core
in JAEA ADS model (Ref.
[1])
10
-2
10
-1
10
0
10
1
10
2
10
3
10
4
10
5
10
6
10
7
0
0.02
0.04
0.06
Neutron energy [eV]
Neutron flux / lethergy [Arbitrary units]
HEU-Pb test zone (KUCA)
LBE-cooled ADS (JAEA)