Speaker
Description
To demonstrate the future Accelerator Driven System (ADS), a large-scale scientific facility - China Initiative ADS (CiADS), is now being constructed in Huizhou City by the Institute of Modern Physics, Chinese Academy of Sciences (IMP-CAS). CiADS consists of an linear accelerator, a spallation target and a sub-critical reactor. Lead-bismuth eutectic (LBE) will be adopted as the spallation material/coolant for the spallation target and the reactor. As one of the key acceptance indicators, continuous proton beam with a power of 250 kW and an energy of 500 MeV will be injected into the spallation target to produce neutrons to drive the sub-critical reactor. Thereafter, the proton beam power will be gradually upgraded to 2.5 MW to meet the final design value of CiADS.
In the CiADS project, there is a cylindrical space at the center of the reactor, into which the spallation target will be inserted. However, the space is extremely limited, and it makes a great challenge to design and install the target in such a narrow space. To solve this issue, a compact target concept is adopted, as can be seen in Fig.1. The heat exchanger of the cooling system and the electromagnetic pump (EMP) are both installed within the target.
To realize the 250 kW LBE spallation target in engineering, a prototype LBE target has been developed to verify system integration and key thermal-hydraulic characteristics, which had been operated over 400 hours; Moreover, to mainly investigate the soundness of the target beam window and the low power accelerator-target coupling technology, a Target Window Test Loop is under construction, and the target head of which will be bombarded by an accelerator (named CAFE2) in IMP-CAS.
In addition to the above works, R&Ds are being conducted to develop key components and technologies to support the construction of the target, such as the target flow channel design, EMP techniques, abnormal diagnostic techniques, etc..
In the presentation, the current development status of the CiADS LBE spallation target will be briefly introduced.
| Themes for the contribution | 6 Construction, fabrication, inspection, quality assurance: |
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