Catalyzes the conversion of monodehydroascorbate to ascorbate, oxidizing NADH in the process (PubMed:16146528). Involved in the detoxification of H(2)O(2) that escapes the peroxisome and causes oxidative damage to oil bodies (PubMed:17449810). H(+) + 2 monodehydro-L-ascorbate radical + NADH = 2 L-ascorbate + NAD(+) The C-terminal domain (451-488) is necessary and sufficient for peroxisomal targeting. Conditional seedling-lethal phenotype due to the unability of the seeds to break down storage oil to provide carbon skeletons and energy for early seedling growth. Belongs to the FAD-dependent oxidoreductase family.