Catalyzes the conversion of monodehydroascorbate to ascorbate, oxidizing NADH in the process. H(+) + 2 monodehydro-L-ascorbate radical + NADH = 2 L-ascorbate + NAD(+) Expressed in leaves, and to a lesser degree in stems, roots and all stages of fruit. By wounding. Belongs to the FAD-dependent oxidoreductase family.