The influence of penetrating gamma radiation on the reaction of simulated nuclear waste glass in tuff groundwater
Static leaching experiments have been performed to determine the influence of penetrating gamma radiation on the reaction of simulated nuclear waste glass in tuff groundwater at 90{degree}C. Both the leachates and the reacted glass monoliths were analyzed to characterize the reaction. Radiation was seen to acidify the leachates, but the high bicarbonate content of the groundwater prevented the pHs from dropping below 6.4. The glass reaction tended to raise the pH. Glass based on SRL 165 black frit and PNL 76-68 glass compositions were leached. The SRL 165 type glasses were quite durable and unaffected by radiation [NL(B) {approximately}4 g/m{sup 2} after 278 days at all exposure rates]. The PNL 76-68 glasses were much less durable, with the durability decreasing as the exposure rate was increased [NL(B) was about 20 g/m{sup 2} after 278 days at 1 {times} 10{sup 3} R/h for both ATM-1c and ATM-8 glasses]. 8 refs., 5 figs.
- Research Organization:
- Argonne National Lab., IL (United States); Argonne National Lab., IL (USA)
- DOE Contract Number:
- W-31109-ENG-38
- OSTI ID:
- 137481
- Report Number(s):
- CONF-890421--10; ON: DE89014671
- Country of Publication:
- United States
- Language:
- English
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