主题：北亚拉巴马( Alabama)龙卷风 亲历记 -- oldnew

这次风灾的政府灾情报告链接如下， 里面有很多图。从04/27， 04/28 几天的报告可以看出当时是很紧张的。维持水的供应， 基本食品的供给对稳定人心有很大作用。

http://ema.alabama.gov/DisasterInformation/Index.cfm

Time line

04/28, No volunteers needed yet. Curfew in all affected area from 8pm to 5:30am. Burglary reduced from 30+ to only 8.

4/29 Shortage of ice, no battery, no radio. Yes, water. Rumor about the water is not safe. Radio put it out right way. Radio announced that police in different uniform has the same arrest power as local police. ( borrowing cops from south part of state). Engineering crews came from out of state help to repair power infra structures.

4/30 Sight seeing. Houses leveled. Seeing house being reduced to rubble no taller than a foot is very different from seeing an aerial photo. Fuel line shortened dramatically. There are car lines and gas can lines.

5/1 Nuclear power plant lost cooling for 28 minutes. It is a good idea to go to Nashville two days ago.

http://www.tva.gov/news/releases/aprjun11/storm.htm

这个链接里有些图，内行应当能看出来输电电压是多少。被风损坏的是 500kV, 161kV线路.

5/2 Power back, TV, internet!

Local Government, Police, Medical, Utility. Radio, TV. Worked together to present a picture of neighbor helping neighbor.

One old female caller on radio blame for crime.

Now the TV, Radio and organizations are calling for volunteers to help cleaning up.

TVA announcement

April 29, 2011 7:00 p.m. EDT

Small Oil Leak Requires Shutdown of a Diesel Generator at Browns Ferry

Shortly before midnight on April 28, 2011, Tennessee Valley Authority equipment operators identified a small oil leak on one of the seven operating diesel generators at Browns Ferry. The equipment operators took prompt actions to shut down the diesel generator for repair minimizing equipment damage. This quick action supported the prompt maintenance of the diesel generator that will allow early return to service of the equipment. The shutdown resulted in some plant equipment being without power on Unit 1 for four minutes and 28 minutes on Unit 2.

During this time period, operators realigned and placed other plant equipment in service which was then powered from a different diesel generator. All three units at Browns Ferry are off-line and in a safe condition following Wednesday’s storms.

Six remaining diesel generators and an off-site high-voltage transmission line remained available and continued to provide multiple redundant power supplies for plant use.

TVA has notified the Nuclear Regulatory Commission of this event. Additionally, an eighth diesel generator that had been out of service for planned maintenance was returned to a standby status and is capable of providing power.

At no time during this event was the public or Browns Ferry employees in any danger. The plant is designed with redundant power and piping systems to ensure the plant remains safe.