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γ-radiolysis of boric acid-lithium hydroxide-ammonia coolant
- Source :
- Fushe yanjiu yu fushe gongyi xuebao, Vol 41, Iss 3, Pp 030201-030201 (2023)
- Publication Year :
- 2023
- Publisher :
- Science Press, 2023.
-
Abstract
- In this study, the γ-radiolysis of boric acid-lithium hydroxide-ammonia coolant was investigated under different conditions, including boric acid concentration, absorbed dose, and absorbed dose rate. The concentrations of H2O2, NO2-, and NO3- were determined using UV-visible spectroscopy and ion chromatography. With an increase in boric acid concentration, the concentrations of H2O2 and NO2- in the coolant system did not change significantly within a pH range commonly used in pressurized water reactor operation. Specifically, the concentration of H2O2 varied from 9.28×10-5 to 1.07×10-4 mol/L, while that of NO2- changed from 0.9×10-5 to 1.5×10-5 mol/L. In contrast, the concentration of NO3- fluctuated significantly, ranging from 4×10-5 to 8×10-5 mol/L. With an increase in the absorbed dose (1-30 kGy), the equilibrium concentration of H2O2 and NO2- in boric acid-lithium hydroxide-ammonia system increased to 1.28×10-4 mol/L and 1.30×10-5 mol/L, respectively. Meanwhile, the concentration of NO3- did not change significantly (4×10-5 to 6×10-5 mol/L). The concentrations of the three radiolytic products were not significantly affected within the given absorbed dose rate range (1.27 to 18.86 Gy/min). Overall, this work provides valuable basic data for optimizing the new boric acid-lithium hydroxide-ammonia coolant system.
Details
- Language :
- Chinese
- ISSN :
- 10003436
- Volume :
- 41
- Issue :
- 3
- Database :
- Directory of Open Access Journals
- Journal :
- Fushe yanjiu yu fushe gongyi xuebao
- Publication Type :
- Academic Journal
- Accession number :
- edsdoj.151d3bd66d24a1796467ed680432915
- Document Type :
- article
- Full Text :
- https://doi.org/10.11889/j.1000-3436.2023-0020&lang=zh