Numerical Simulation of Influence of Hydrogen Peroxide Photolysis on Water Chemistry in BWR Plant

• Published in: Journal of nuclear science and technology Vol. 38; no. 8; pp. 637 - 644
• Main Authors: DOMAE, Masafumi, ONO, Shoichi, HISHIDA, Mamoru
• Format: Journal Article
• Language: English
• Published: Tokyo Taylor & Francis Group 01.08.2001; Atomic Energy Society of Japan
• Subjects: Applied sciences; Boiling water reator; coolant; decomposition; Energy; Energy. Thermal use of fuels; Exact sciences and technology; Fission nuclear power plants; hydrogen peroxide; hydrogen water chemistry hydrogen addition; Installations for energy generation and conversion: thermal and electrical energy; photolysis; simulation; Water chemistry; Boiling water reactor; Hydrogen peroxide; Coolant; Photolysis; Laser; Radiolysis; Numerical simulation; Corrosion protection; Dose rate; Nuclear reactor
• ISSN: 0022-3131; 1881-1248
• DOI: 10.1080/18811248.2001.9715077

As a novel technique to enhance the effect of H 2 addition for HWC (hydrogen water chemistry) in BWR coolant, UV light photolysis of H 2 O 2 was proposed. The effect of the H 2 O 2 photolysis on water radiolysis was simulated for a batch system at 288°C. It was demonstrated that this technique reduced the concentrations of H 2 O 2 and O 2 with less amount of H 2 than that under ordinary HWC condition. It was found that the technique can reduce the H 2 O 2 concentration even in the absence of H 2 addition although the OH concentration increases concomitantly. The radiation chemical mechanism under ordinary HWC condition is discussed briefly. The UV laser power required to reduce concentrations of the oxidizing species was estimated for a dose rate of †-ray 100Gy-s -1 based on the simulated results. A potential role of the Cherenkov radiation in H 2 O 2 decomposition in coolant of a BWR plant was pointed out.