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Table 1. Thermal Conductivity of Liquid UO2 from Measurements of Thermal Diffusivity and Thermal Conductivity

Experiment Kim et al. [1] Otter & Damien [2] Tasman et al. [3,4]
Property Measured Thermal Diffusivity Thermal Diffusivity Thermal Conductivity
Method Periodic Heat Flow Laser Flash Laser Heating - Melt & Ablate UO2 self-contained sample
Sample

UO2 in tungsten

3 -layers; UO2 layer:

0.8 mm, 1.2 mm

UO2 in tungsten

3 -layers;

UO2 layer: 0.7 mm

UO2 6-mm diam. disc

partially molten; molten layer: 0.2 mm

k reported, W m-1 K-1

11

8.5

2.0-2.4; mean 2.2 [3]

Re-evaluated 3-dim. transient heat transfer model [5]

k, W m-1 K-1

5.5 (mean)

4.8 (thin 0.8 mm)

6.2 (thick 1.2 mm)

6.7

4.5

Corrected 3-dim transient heat transfer calculation using Cp of Ronchi et al. [6]

k, W m-1 K-1

3.9 (thin)

5.1 (thick)

5.8

3.3

Re-measurement & f.e.m**. analysis under unsteady conditions;

k, W m-1 K-1[4]

2.5 [4]

* f.e.m. stands for finite element method

Assessed 1996
Version 0 for Peer Review