## 7 Changes in Section 4.1 Significance of Reactions  
In paragraph 1 line 4-8 the sentences \"Simulation performed for the dose rate 1 kGy\(\cdot\)s\({}^{-1}\) showed that skipping reactions (1), (9), (10), (16), (18), (21), (22), (47), and (52) results in a relative error of the steady-state concentrations of radiolytic products below 0.1%, for all the systems studied. Reactions (2), (23), (55), (56) are slightly more important, but their integrated contributions are of the order of 10\({}^{-5}\) mol\(\cdot\)kg\({}^{-1}\).\" should be changed to \"Simulation performed for the dose rate 1 kGy\(\cdot\)s\({}^{-1}\) showed that skipping reactions (1), (22), (47), (52), (53), (55), and (56) results in a relative error of the steady-state concentrations of radiolytic products below 0.1%, for all the systems studied\". In paragraph 2 lines 5-10 the sentences \"The upper part presents net contributions R24-R25, R26-R27, R36-R37 of equilibria (24) \(\leftrightarrow\) (25), (26) \(\leftrightarrow\) (27), (36) \(\leftrightarrow\) (37), obtained for gamma and fast neutron irradiation, whereas the lower part refers to equilibria (38) \(\leftrightarrow\) (39), (40) \(\leftrightarrow\) (41), (42) \(\leftrightarrow\) (43), which net contributions are two orders of magnitude smaller. Net contributions R28-R29, R30-R31, R32-R33, R34-R35, R49-R50, not shown in the figure, are of the order of 10\({}^{-7}\)-10\({}^{-4}\) mol\(\cdot\)kg\({}^{-1}\).\" should be changed to \"The upper part presents net contributions R24-R25, R38-R39, R40-R41, R42-R43 of equilibria (24) \(\leftrightarrow\) (25), (38) \(\leftrightarrow\) (39), (40) \(\leftrightarrow\) (41), (42) \(\leftrightarrow\) (43), obtained for gamma and fast neutron irradiation, whereas the lower part refers to equilibria (26) \(\leftrightarrow\) (27), (28) \(\leftrightarrow\) (29), (34) \(\leftrightarrow\) (35), (36) \(\leftrightarrow\) (37). Net contributions R30-R31, R32-R33, R49-R50 are of the order of 10\({}^{-7}\)-10\({}^{-5}\) mol\(\cdot\)kg\({}^{-1}\) and are not shown in Figure 6\". In the original publication, there was a mistake in Figure 6 as published. The correct Figure 6 appears below:  
Figure 6: Net contributions of equilibria reactions calculated for 1 kGy\(\cdot\)s\({}^{-1}\) fast neutron (n) and gamma (g) radiolysis of neutral water, alkaline solution, and hydrogenated (3\(\cdot\)10\({}^{-5}\) mol\(\cdot\)kg\({}^{-1}\) H\({}_{2}\)) neutral and alkaline systems. Equilibria resulting in net contribution below 1\(\cdot\)10\({}^{-4}\) mol\(\cdot\)kg\({}^{-1}\) are not shown. \begin{table}
\begin{tabular}{c c c} \hline \hline
**Oxidant/Solution** & **1 kGy\(\cdot\)s\({}^{-1}\)** & **10 kGy\(\cdot\)s\({}^{-1}\)** \\  & **Neutron \(\gamma\)-Radiolysis** & **Neutron \(\gamma\)-Radiolysis** \\ \hline H\({}_{2}\)O\({}_{2}\)/neutral & 8.8-10\({}^{0}\) 3.1\(\cdot\)10\({}^{0}\) & 4.2\(\cdot\)10\({}^{0}\) 2.4\(\cdot\)10\({}^{0}\) \\ H\({}_{2}\)O\({}_{2}\)/alkaline & 8.5-10\({}^{2}\) 1.4\(\cdot\)10\({}^{2}\) & 6.5\(\cdot\)10\({}^{2}\) 1.0\(\cdot\)10\({}^{2}\) \\ \hline O\({}_{2}\)/neutral & 4.2-10\({}^{2}\) 2.7\(\cdot\)10\({}^{2}\) & 1.5\(\cdot\)10\({}^{2}\) 1.1\(\cdot\)10\({}^{2}\) \\ O\({}_{2}\)/alkaline & 2.2-10\({}^{6}\) 5.0\(\cdot\)10\({}^{6}\) & 8.7\(\cdot\)10\({}^{5}\) 1.4\(\cdot\)10\({}^{6}\) \\ \hline \hline \end{tabular}
\end{table} 
Table 3: Effectiveness of hydrogen addition expressed as a ratio of the steady state concentration in the absence of extra hydrogen and in the solution containing 1.5-10\({}^{-4}\) mol\(\cdot\)kg\({}^{-1}\) H\({}_{2}\). In paragraph 3 the sentences \"Equilibrium (24) \(\leftrightarrow\) (25) is shifted to the right, whereas equilibria (26) \(\leftrightarrow\) (27) and (36) \(\leftrightarrow\) (37) are shifted to the left. The net contributions of these equilibria increase with LET and are decreased by the addition of base and H\({}_{2}\).