Solar flares and coronal mass ejections release plasma during solar storms and activities. Such explosions occur against the huge gravitational attraction of the sun with acceleration of plasma filaments into space away from the sun. Recently, NASA has measured huge enrichment of 3He in such solar flares. The 3He enrichment mechanism is unknown. In this work, the author reports a new mechanism of 3He enrichment via the negative nuclear magnetic moment (NMM) of 3He and its dissipation of -NMM to dark (Dk) field. This mechanism is derived on the basis of prior mechanism of RBL for planetary lightning (plasma) by production of streamers and step leaders in huge electric field of back ground null and or positive NMMs with rattling of trace seed solute nuclei of negative NMMs for inducing local electric fields and Dk fields about the trace — NMMs for seeding path of least resistance among the many step leaders as one leader of more enriched negative NMMs is selected for discharging the lightning channel. Evidence of such a mechanism by RBL is further discussed.