oxidoreductase activity, acting on NAD(P)H, quinone or similar compound as acceptor monodehydroascorbate reductase (NADH) activity NADH-semidehydroascorbate oxidoreductase activity SDA reductase activity semidehydroascorbate reductase activity NADH:semidehydroascorbic acid oxidoreductase activity GO:0016656 monodehydroascorbate reductase activity NADH:monodehydroascorbate oxidoreductase activity AFR RHEA:14581 EC:1.6.5.4 ascorbate free radical reductase activity AFR-reductase activity MetaCyc:1.6.5.4-RXN molecular_function ascorbic free radical reductase activity NADH:AFR oxidoreductase activity MDAsA reductase (NADPH) NADH:ascorbate radical oxidoreductase activity MDHA ascorbate free-radical reductase activity Catalysis of the reaction: 2 monodehydro-L-ascorbate radical + NADH + H+ = 2 L-ascorbate + NAD+.