Following a relatively quiet spring maintenance and refueling season which saw near record levels of nuclear generation, the Fall maintenance season may prove to be much busier with significant amounts of nuclear generation going off-line for extended periods of time. Based on historic maintenance schedules, the Northeast region may be one of the hardest hit in the country. As many as thirteen nuclear plants are expected to shutdown for refueling and other planned maintenance starting as early as mid-September with the season lasting until mid-December. On a monthly level, four plants totaling 4.3 GW are expected to go off-line before the end of the month with an average daily outage level of 3.2 GW/d which represents up to 570 MMcf/d of gas burn replacement. October will most likely be the peak outage month with up to eleven plants being off-line for portions of the month. Total outages may peak near 7.7 GW at the beginning of the month, averaging 6.3 GW/d, or 1.1 Bcf/d of gas burn replacement, over the remainder of the month. Maintenance will begin to roll-off in November as outages are expected to average 5.0 GW/d, requiring up to 901 MMcf/d in gas burn replacement. As scheduled maintenance winds down by the middle of December, outages for the first half of the month are expected to average 1.9 GW/d with up to 346 MMcf/d of gas burn replacement.