RRFM 2009 Transactions - European Nuclear Society

Calculated/Experimental (C/E)
Axial Position *F8 F6
-17.8 1.11 1.12
-12.8 1.14 1.16
-7.8 1.11 1.14
-2.8 1.14 1.15
2.2 1.04 1.06
7.2 1.00 1.01
12.2 0.96 0.96
17.2 0.85 0.91
22.2 0.81 0.82
27.2 0.87 0.89
Table 2: Ratio (C/E) of calculated to experimental total nuclear heating in Stainless steel (SS304) core
calorimeter
4.2 Molybdenum Core Calorimeter
The heating of molybdenum is expected to be dominated by gamma heating since has a
relatively high atomic number (Z) compared to stainless steel (Z~29). Figure 4 presents total
nuclear heating rates for a molybdenum core calorimeter. The *F8 and F6 tallies are still in
good agreement. Below the core centreline, there are large discrepancies between the
calculated and experimental values. Better agreement is observed above the core centreline.
1.0
0.9
Pulsed height tally (*F8)
Track length estimate (F6)
Experimental
Total nuclear heating (W/g)
0.8
0.7
0.6
0.5
0.4
0.3
0.2
-20 -10 0 10 20 30
Axial distance with respect to the core centerline (cm)
Figure 4: Total nuclear heating in a Molybdenum core calorimeter
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