A day after a power failure at the Indian Point nuclear plant complex, officials were dealing with new problems today: an early-morning fire, and criticism of the long hours that security officers there are forced to work. The criticism was prompted by a letter to security officers dated April 21 from an official of the Entergy Corporation, which owns the plants. The letter alerted the officers to the likelihood of working “five 12-hour days and occasionally six 12-hour days” to prepare for an antiterrorism drill in early summer. The letter was made available to The New York Times today by the Project on Government Oversight, a national watchdog group in Washington that has focused on nuclear plant security in the wake of Sept. 11. Full Story