Effects of process-generated hydrogen on RPV walls

5. Hydrogen production in PWR

(a) Atomic H concentration in the primary water as a function of the B concentration.

(b) H 2 concentration in the primary water as a function of the B concentration.

Figure 5.8: Variation of the a) atomic H and b) H 2 concentration in the primary water as a function of the boron concentration. The B-Li concen- trations are taken from Figure 4.1. The temperature is 300 ◦ C and the O 2 and H 2 O 2 concentrations are 1 ppb. A typical neutron and γ -radiation of 5 10 5 and 3 10 5 G/s are used. 56