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Journal Articles

Application of electron beams for the treatment of VOC streams

Hirota, Koichi; Sakai, Hiroki*; Washio, Masakazu*; Kojima, Takuji

Industrial & Engineering Chemistry Research, 43(5), p.1185 - 1191, 2004/03

 Times Cited Count:42 Percentile:78.89(Engineering, Chemical)

Twenty volatile organic compounds (VOCs) were irradiated with electron beams in laboratory scale to obtain an electron-beam energy required for a 90% treatment. The experiments showed that the energy was related with the chemical structure and roughly estimated from rate constants for reactions with OH radicals. The cost analysis revealed that the unification of a self-shielding electron accelerator with a reactor could reduce the capital cost for an electron-beam system. Electron-beam technology is a promising method for the treatment of VOCs.

Journal Articles

Progress of LWR structural safety research at JAERI

Shibata, Katsuyuki

Nucl. Eng. Des., 174(1), p.79 - 90, 1997/00

 Times Cited Count:1 Percentile:14.83(Nuclear Science & Technology)

no abstracts in English

Journal Articles

Trend of the industrial of radiatern processing

Machi, Sueo

Genshiryoku Kogyo, 29(12), p.31 - 37, 1983/00

no abstracts in English

Oral presentation

Development of a sensor for in-situ measurement of hydrogen peroxide in irradiation field by using frequency dependent complex impedance analysis

Hanawa, Satoshi; Hata, Kuniki; Uchida, Shunsuke; Nishiyama, Yutaka

no journal, , 

Water in the primary circuit of Nuclear Power Plants (NPPs) decomposes by radiolysis, then oxidants such as hydrogen peroxide and oxygen are generated as a result. Hydrogen peroxide is one of the major factor for initiation and propagation of stress corrosion cracking (SCC) in structural materials, hence in-situ monitoring of hydrogen peroxide at the point of interest in irradiation field is quite important to assure the integrity of NPPs. Concentration of hydrogen peroxide in irradiation field is governed by energy deposition by neutron and $$gamma$$-ray in which the degree of energy is different in locations, while concentration in un-irradiation area decreases due to thermal decomposition. Quantitative evaluation of hydrogen peroxide is, however, available only by analyzing sampled water at present, and therefore in-situ monitoring of hydrogen peroxide at the point of interest becomes quite important. Frequency dependent complex impedance (FDCI) analysis gives characteristics of oxide film on the materials, and it becames clear by recent activities that the low frequency semicircles in Cole-Cole plots shows linear correlation to the concentration of hydrogen peroxide. JAEA is now developing a sensor for in-situ monitoring of hydrogen peroxide applicable to irradiation environment by applying FDCI. The outline and overall schedule of the sensor development will be reported in the presentation.

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