Federal regulators are launching a pilot study of cancer risks in populations around six nuclear power plants in the United States, including the Millstone Power Station and decommissioned Haddam Neck site in southeastern Connecticut.

The Nuclear Regulatory Commission will study multiple cancer types in populations near the facilities and examine in a case-control study cancers in children born near the facilities.

The National Academy of Sciences recommended the sites in California, Connecticut, Illinois, Michigan, New Jersey and Tennessee because they provide a broad sampling of facilities with different operating histories, population size and levels of complexity in data in state cancer registries.

The $2 million study is expected to begin in the next three months and continue at least into 2014.