Speaker
Chengzhi Cao
(Southwestern Institute of Physics)
Description
This paper describes the analysis performed for the final design review of the ITER Gas Distribution System (GDS) manifolds to verify the system structural integrity. The GDS manifolds, which consist of Gas Fuelling (GF) manifold and Neutral Beam (NB) manifold, are complex combination pipes, of which gas supply lines and evacuation line are enclosed in a guard pipe. Based on the loading conditions and safety requirements, four categories of events and distinct criteria levels and corresponding load categories and service limits have been defined first, and then the structural failure modes including the plastic collapse, ratcheting, local failure and buckling have been verified. The simplified pipe element models have been used in linear elastic static analysis and spectrum analysis, and the typical sections for buckling analyses have been discretized by solid element considering material nonlinearity. The analysis results showed that both the GF and the NB manifolds are safe under all loading cases and the structural integrity requirements against all the failure modes are well satisfied. The GDS manifold design is robust with enough safety margins.
Co-authors
Bo Li
(Southwestern Institute of Physics, Chengdu, China)
Chengzhi Cao
(Southwestern Institute of Physics, Chengdu, China)
So Maruyama
(ITER Organization, Route de Vinon sur Verdon, 13115 Saint Paul Lez Durance, France)
Tao Jiang
(Southwestern Institute of Physics, Chengdu, China)
Wei Li
(Southwestern Institute of Physics, Chengdu, China)
Yu Yang
(ITER Organization, Route de Vinon sur Verdon, 13115 Saint Paul Lez Durance, France)
Yudong Pan
(Southwestern Institute of Physics, Chengdu, China)
