Abstract
The treatment of flue gases from power plants and municipal or industrial wastewater using electron beam irradiation technology has been successfully demonstrated in small-scale pilot plants. The beam energy requirement is rather modest, on the order of a few MeV, however the adoption of the technology at an industrial scale requires the availability of high beam power, of the order of 1 MW, in a cost effective way. In this article we present the design of a compact superconducting accelerator capable of delivering a cw electron beam with a current of 1 A and an energy of 1 MeV. The main components are an rf-gridded thermionic gun and a conduction cooled beta= 0.5 elliptical Nb3Sn cavity with dual coaxial power couplers. An engineering and cost analysis shows that the proposed design would result in a processing cost competitive with alternative treatment methods.
Highlights
Electron irradiation is a demonstrated method to reduce contaminants in substances such as flue gases from power plants and wastewater from industries or municipalities [1,2,3]
We present a design of a compact, cw SRF linear accelerator aiming at delivering an electron beam of energy ∼1 MeV and beam power ∼1 MW for the treatment of wastewater and flue gases
Source term and reference shielding data. Both source terms and shielding data for different materials are available in reports 51 [50] and 144 [51] of the National Council on Radiation Protection and Measurements (NCRP)
Summary
Electron irradiation is a demonstrated method to reduce contaminants in substances such as flue gases from power plants and wastewater from industries or municipalities [1,2,3]. The most powerful one is the ELV-12, a cascade accelerator with parallel inductive coupling developed by the Budker Institute of Nuclear Physics in Russia and commercialized by EB Tech Co., Ltd. in South Korea Such an accelerator has three accelerating tubes providing electrons with energy between 0.6 and 1 MeV and a total beam power of up to 400 kW, and it has been used in a dyeing wastewater treatment plant in South Korea [4]. We present a design of a compact, cw SRF linear accelerator aiming at delivering an electron beam of energy ∼1 MeV and beam power ∼1 MW for the treatment of wastewater and flue gases. V the results from the design study are discussed along with upgradeability to higher beam energy and further R&D required to lower the cost
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