Mudcat Café message #3190368 The Mudcat Café TM
Thread #136314   Message #3190368
Posted By: Charley Noble
18-Jul-11 - 07:54 PM
Thread Name: BS: Japan Nuclear plant disaster, 2011
Subject: RE: BS: Japan Nuclear plant disaster, 2011
The typhoon is supposed to hit the South Islands of Japan. But I understand that all nuclear plants are scrambling to prepare themselves.

Here's some recommendations I just received in the Union of Concerned Scientists newsletter Catalyst under lessons learned for US reactors:

1. Insufficient Backup Power -- US reactors generally have less backup battery power than they had at Fukushima-1, 4 hours instead of 8 hours and more than that would be better.

2. Vulnerable Spent Fuel Pools -- the spent fuel stored in the pools at Fukushima probably melted down as well; backup power is needed for their water cooling systems as well and their sheet metal siding "like that of a Sears storage shed" is not adequate containment if something goes wrong.

3. Shortsighted Evacuation Planning -- the 12-mile evacuation radius for the Fukushima-1 plant was inadequate and current NRC rules only require a 10-mile zone in the States. Planning needs to take into consideration a 50-mile radius as was recommended for US citizens in Japan.

4. Require that spent fuel be shifted out of spent fuel pools after 5 years of cooling into dry cask storage. The spent fuel pools at Fukushima were stuffed with more (3 to 4 times) spent fuel than they were originally designed to hold, and the case is similar in the States.

Charley Noble