[FZJ-2019-03205]
Report/Internal Report
Horne, G. P. ; Wilden, A. ; Mezyk, S. P. ; et al
Radiolysis of Hydrophilic Diglycolamides in Aqueous Nitrate Solution
[NTRD-MRWFD-2019- M3FT-19IN030102018]
21 p. (2019)2019
The radiation chemistry of a series of hydrophilic DGAs (TEDGA, Me-TEDGA, Me2-TEDGA, and TPDGA) has been investigated under neutral pH, concentrated (5.0 M), aqueous nitrate solution conditions. A combination of steady-state gamma and time-resolved pulsed electron irradiation experiments, supported by advanced analytical techniques and multi-scale modeling calculations, have demonstrated that: (i) the investigated hydrophilic DGAs undergo first-order decay with an average dose constant of (3.48 ± 0.28) × 10–6 Gy–1; (ii) their degradation product distributions are similar to those under pure water conditions, except for the appearance of NOx adducts; and (iii) radiolysis is driven by hydroxyl and nitrate radical oxidation chemistry moderated by secondary degradation product scavenging reactions. [...]
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