Speaker
Description
Abstract: As a fourth-generation nuclear reactor concept, molten salt reactors (MSRs) have unique advantages in safety, economy, and nonproliferation, but online fuel salt treatment remains immature. To avoid complex online fuel treatment, the Thorium-Based Molten Salt Fast Energy Amplifier (TMSFEA) concept was proposed. Compared with traditional Accelerator-Driven Subcritical (ADS) systems, the TMSFEA reactor operates at a higher temperature (over 600 ℃), which enables higher thermal efficiency but also imposes stricter requirements on reactor-accelerator coupling design. Thus, a study on TMSFEA’s reactor–accelerator coupling design was conducted: the beam window was isolated from liquid molten salt, with a 2-meter-long helium column inserted between them for protection at standard atmospheric pressure. A beam window structure was designed, featuring single-layer films on both sides and a double-layer film with cooling water flow in the middle, and the effects of parameters like film radius and thickness on the proton beam window’s temperature rise and thermal stress were analyzed. After optimization, the beam window film’s maximum temperature and thermal stress were 42.5 ℃ and 66.4 MPa, respectively. FLUKA was used to analyze the beam window’s radiation damage. Under 1 GeV/4 mA beam current and one-year continuous operation, the calculated value of DPA per year is 0.008 DPA. The safe operating life of the beam window exceeds the 39-year safe operating life of the TMSFEA.
