11.   GERD is caused by a faulty valve that allows stomach contents to back up and cause heartburn.

12.   Lajous said the fire apparently was caused by repair work being done on a faulty valve Monday afternoon.

13.   Lajous said the first tank exploded Monday afternoon apparently because of repair work to a faulty valve.

14.   Last week, the unit was shut down for a planned monthlong technical revision and replacement of faulty valves.

15.   One device is like a tiny sewing machine that puts a few stitches in the faulty valve causing heartburn, creating little pleated gathers to strengthen it.

16.   The electrodes burn spots on the muscle controlling the faulty valve.

17.   The failure, a faulty valve, has been identified and the launch rescheduled for early Saturday.

18.   The faulty valve must be replaced.

19.   The other device, which Humphrey tried, zaps the faulty valve with radiofrequency energy, beams of heat.

20.   The plant then will be shut down for about one month for technical revision and replacement of faulty valves, Nebesar said.