  Ideal MHD stability of China Fusion Engineering Test Reactor (CFETR) upgrade
phase-I baseline scenario has been evaluated using the initial value code
NIMROD. The toroidal mode numbers for n=1-30 have been considered for stability
analysis both in single-fluid and two-fluid MHD models. Our calculation rusults
show that all modes are found to be unstable with characteristics of
edge-localized modes. For n $\leq$ 13 modes, two-fluid MHD model gives a
slightly higher growth rates than single-fluid MHD model, while for n $>$ 13
modes, this trend becomes opposite, which means two-fluid MHD model is needed
for high-n mode analysis. In addition, $n=1-10$ modes are found to be more
unstable with increasing wall position and eventually their growth rates
approach values in the no-wall limit.
