  Radial profiles of the ion saturation current and its fluctuation statistics
are presented from probe measurements in L-mode, neutral beam heated plasmas at
the outboard mid-plane region of KSTAR. The familiar two-layer structure, seen
elsewhere in tokamak L-mode discharges, with a steep near-SOL profile and a
broad far-SOL profile, is observed. The profile scale length in the far-SOL
increases drastically with line-averaged density, thereby enhancing plasma
interactions with the main chamber walls. Time series from the far-SOL region
are characterised by large-amplitude bursts attributed to the radial motion of
blob-like plasma filaments. Analysis of a data time series of several seconds
duration under stationary plasma conditions reveals the statistical properties
of these fluctuations, including the rate of level crossings and the average
duration of periods spent above a given threshold level. This is shown to be in
excellent agreement with predictions of a stochastic model, giving novel
predictions of plasma-wall interactions due to transient transport events.
