[en] In a continuation of last year's study, collective radiation dose commitments were estimated for all operating water-cooled nuclear power plant sites, utilizing atmospheric and liquid radioactivity releases reported to the Nuclear Regulatory Commission for 1976. Results are presented of collective dose commitments from these release pathways to four population groups: infant, child, teenager, and adult residing between 2 and 80 km from each site. Typical individual doses were estimated for each site and for all the sites together. The sites were rated as to their power output per unit population dose and per unit average individual dose. Results for 1976 operating reactors indicate a reduction of overall collective dose from those operating in 1975 even though more electrical energy was generated in 1976