  We report on studies of next-to-leading order (NLO) QCD corrections to the
process $pp\rightarrow e^+\nu_e\mu^+\nu_\mu jj$ which is associated with
vector-boson fusion (VBF) production of an intermediate $W^+W^+$ pair. The
impact of s-channel diagrams and interference contributions in VBF kinematics
is analyzed at leading order (LO) and found to be entirely negligible. The NLO
corrections are around 5% of the LO cross section, and the scale dependence is
reduced to about ~1%. We introduce a dynamic scale which improves the K factor
in the high-energy tails of the distributions.
