Speaker
Description
The Second Target Station (STS) at Oak Ridge National Laboratory is designed to produce the world’s highest peak brightness neutron source using a 700 kW proton beam at 15 Hz, which interacts with solid rotating tungsten (W) target segments. The tungsten blocks are encapsulated in a 2-mm thick copper layer that retains the radioactive products generated during the spallation reaction, transfers heat to the cooling channels through its high thermal conductivity, and prevents direct contact between the water and tungsten to avoid erosion and corrosion. The copper cladding is further enclosed in a thick Inconel shroud that contains the cooling channels. This paper discusses the cooling channel design choices for the STS target segments, the target shaft, and the flow balance between them. It also explores the required flow rates under beam-off conditions to effectively remove decay heat. The results indicate that a flow rate of 0.1 GPM is sufficient to maintain the target block temperature below 92.5°C, satisfying the requirement of keeping the surface temperature below 150°C after 10 years of operation.
| Region represented | America |
|---|---|
| Paper preparation format | Word |
