Nuclear vessels face cracking risk at eight older plants
NRC surveys reveal eight eight inch steel reactor shells may crack under certain accidents though no immediate safety risk is shown. Plants include Fort Calhoun Unit One, H B Robinson, Maine Yankee, Oconee Unit 1, Turkey Point Unit 4, Calvert Cliffs Unit 1, Three Mile Island Unit One, and San Onofre Unit 1. corrective action may be needed within about a year.