Measurements are reported for the angle-averaged double-differential cross section 2 n n 0 < <7.4 d d d E θ σ°Ω° for the breakup reaction 2 H(n,2n) 1 H, induced by 14-MeV neutrons generated using an inertial confinement fusion platform. A bright neutron source, created on the OMEGA Laser System [T. R. Boehly et al., Opt. Commun. 133, 495 (1997)] with a luminosity of L = 10 24 s-1 , was used to irradiate deuterated targets. The absolute yields and energy spectra from the breakup neutrons emitted in a forward-angle geometry (θ = 0° to 7.4°) were detected with a sensitive, highdynamic-range neutron time-of-flight spectrometer. The cross-section data, measured for neutron energy range from 0.5-to 10-MeV, are well reproduced by theoretical model calculation employing realistic nucleon-nucleon and three-nucleon forces.