Working group summary report on effects of pulsed operation
- Oak Ridge Natinonal Lab., TN (United States)
- Paul Scherrer Institute, Villingen (Switzerland)
In a short pulsed spallation neutron source, extremely high energy ({approx_gt}1 GeV) proton beam pulses are injected into a liquid metal target in a very short period of time ({approximately}1 {mu}sec) at a high repetition rate ({approximately}50 Hertz). The beam energy will be deposited in the target materials (such as mercury or lead) and converted into heat. It causes a sudden temperature rise and resulting pressure wave. This pressure wave travels through the liquid, reaches the steel container wall and may possibly lead to material damage due to induced stress. Almost all participants agreed that the shock problem due to the short pulse operation in the liquid metal target could be serious and could present a challenging problem. It was determined that the following points need to be addressed: (1) equation of state for mercury (2) code validation and benchmark experiments (3) shock effects on the entire target system (4) two phase flow by gas injection. All these investigations should be carried out in the framework of international cooperation. Two small scaled Hg pressure pulse tests are planned at ORNL to provide insight into the pressure wave propagation and thermal shock effects. One experiment will use exploding wires to generate the pulse pressure, the other the electron beam at ORELA. Also PSI, LANL, CERN (ISOLDE facility), INR and IPPE could contribute to the experimental methods for producing shock. The necessary R&D for bubble injection might be performed at PSI, RIGA, ORNL or Ben-Gurion University. All of the above experiments can possibly yield benchmarking data which is absolutely necessary for code validation.
- Research Organization:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- OSTI ID:
- 381065
- Report Number(s):
- CONF-9603171-; ON: DE96014047; TRN: 96:005200-0028
- Resource Relation:
- Conference: International workshop on the technology and thermo hydrolics of heavy liquid metals (Hg,Pb,Bi, and their Eutectics), Schruns (Austria), 25-28 Mar 1996; Other Information: PBD: Jun 1996; Related Information: Is Part Of Proceedings of the international workshop on the technology and thermal hydraulics of heavy liquid metals (Hg, Pb, Bi, and their eutectics); Appleton, B.R.; Bauer, G.S. [comp.]; PB: 500 p.
- Country of Publication:
- United States
- Language:
- English
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