54
C. H. Pyeon
(d) Case 4
(e) Case 5
10 11 12 13
14 15 16
17 18 19 20
G
H
I
F
F
F
F
F
J
F
F
F
F
F
K
F
F
S V F
F
L
F
F
S V F
F
M
22 SV 22
O
s '
P
s
s
s
Q
s
s
s
R
b
bs bs bs
b
T
b
bs bs bs
b
U
f
fs
fs
fs
f
W
C3
S5
S4
C1
C2
S6
10 11 12 13
14 15 16
17 18 19 20
G
H
I
F
F
F
F
F
J
F
F
F
F
F
K
F
F S V F
F
L
F
F S V F
F
M
26 SV 26
O
s '
P
s
s
s
Q
s
s
s
R
b
bs bs bs
b
T
bb s b s b sb
U
f
f s
f s
f s
f
W
C3
S5
S4
C1
C2
S6
26 Partial fuel (3/8"P26EU)
22 Partial fuel (3/8"P22EU)
s'
Void 1 + polyethylene
(f) Case 6
10 11 12 13
14 15 16
17 18 19 20
E
G
H
I
F
F
F
F
F
J
F
F
F
F
F
K
F
F S V F
F
L
F
F S V F
F
M
24 SV 24
O
s '
P
s
s
s
Q
s
s
s
R
b
bs bs bs
b
T
b
bs bs bs
b
U
f
fs
fs
fs
f
W
C3
S5
S4
C1
C2
S6
24 Partial fuel (3/8"P24EU)
1/2"φ BF3 detector
Fig. 3.1 (continued)