11.   It moved ahead with plans to plug the faulty tube and resume operation, but the NRC rejected that idea, saying the steam generators needed more analysis.

12.   Last week, the commission sent a letter to plant managers requiring further extensive analysis of the steam generators before it could be reopened.

13.   Most of the maintenance work involved one-time replacements of steam generators at its McGuire and Catawba nuclear plants.

14.   Most of the maintenance work involved one-time replacements of steam generators at its Oconee, McGuire and Catawba nuclear plants.

15.   Most nuclear reactors that get new steam generators are younger than Maine Yankee.

16.   Spall said the leak was in a steam generator, which is a heat exchanger inside the containment dome.

17.   Steam generators are designed with extra tubes so bad ones can be plugged.

18.   Steam generators are used to convert water into the steam that is used to the spin the electricity-generating turbine in a nuclear plant.

19.   The accident was caused when a corroded tube in one steam generator cracked, allowing radioactive water to mix with clean water.

20.   The company rejected the offer as too low, and is expected to reopen the bids for the three steam generators in the next two months.