Effects of process-generated hydrogen on RPV walls

6. Hydrogen concentration in PWR wall

Table 6.2: The maximum Henry coefficient and corresponding temperature for the noble gases, including the Van der Waals radius of these elements and Hydrogen. [72, 75]

[72] T

[72] Van der Waals radius [75]

max i

max i

Element H

[GPa]

[K]

[pm]

H

–

–

120 [76]

He Ne Ar Kr Xe

14.33 [71]

307 [70]

143 158 194 207 228

13.30

326.9 364.3 380.8 389.8

6.44 4.39 3.16

Figure 6.3: Relation between the maximum Henry coefficient and the Van der Waals radii of the noble gases. The linear correlation results in a R 2 - value of 0.97, which is reasonable. The maximum Henry constant for atomic hydrogen is estimated to be 17.9 GPa. [71, 72, 75]

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