Free interface forming device and windowless spallation target system

Abstract

The invention relates to a free interface forming device which is used for a windowless spallation target of a subcritical system driven by an accelerator. The free interface forming device comprises an annular inlet flow-equalizing section, a taper-shaped gathering section and a lower pressure-control cavity, wherein the annular inlet flow-equalizing section, the taper-shaped gathering section and the lower pressure-control cavity are formed into a communicated fluid channel; the annular inlet flow-equalizing section is used for supplying a stable inlet flowing condition to the taper-shaped gathering section; the taper-shaped gathering section is arranged between the annular inlet flow-equalizing section and the lower pressure-control cavity and is used for forming a free interface by gathering the fluid entering the annular inlet flow-equalizing section at a preset conical angle; and the fluid is discharged into the lower pressure-control cavity in a free falling form at an outlet of the taper-shaped gathering section. The invention provides the free interface forming device for the windowless spallation target, which can be used for forming more stable and complete free interface; the size of a cycling area on a fluid side of the free interface is reasonably and effectively reduced by a flowing field of the free interface formed by the device; and the heat removing capacity of the flowing field is increased.

Description

technical field [0001] The invention relates to a windowless spallation target used in an accelerator-driven subcritical system (ADS), in particular to a free interface forming device for a windowless spallation target system, and a windowless spallation target including the device system. Background technique [0002] Accelerator-driven subcritical transmutation system (ADS) is internationally recognized as a promising new nuclear system for transmuting long-lived nuclear waste and fundamentally disposing of nuclear waste. The ADS system consists of a high-current proton accelerator, a spallation target and a subcritical core. The spallation target provides an external high-energy external neutron source for the subcritical core to maintain operation through the spallation reaction of high-energy protons bombarding heavy metals. As a coupling part between the accelerator and the subcritical core, the spallation target plays a vital role in the overall operation safety of ...

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Problems solved by technology

[0006] The purpose of the present invention is to provide a free interface forming device to solve the technical problem that none of the existing windowless spallation targets can reasonably and effectively reduce the liquid-side swirl area of ​​the free interface while ensuring the integrity and stability of the free interface

[0007] Another object of the present invention is to provide a windowless spallation target system to solve the problem that none of the existing windowless spallation targets can reasonably and effectively reduce the liquid side of the free interface while ensuring the integrity and stability of the free interface. Technical problems in the roundabout area

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