According to some commentators, the 1979 accident at Three Mile Island played a major part in the reduction in the number of new plant constructions in many other countries. According to the Nuclear Regulatory Commission (NRC), the Three Mile Island accident was the most serious accident in "U.S. commercial nuclear power plant operating history, even though it led to no deaths or injuries to plant workers or members of the nearby community." The regulatory uncertainty and delays eventually resulted in an escalation of construction related debt that led to the bankruptcy of Seabrook's major utility owner, Public Service Company of New Hampshire. At the time, the fourth largest bankruptcy in United States corporate history.