Where are the US reactors similar to those in crisis in Japan?
There are 23 GE Mark1 Boiling Water Reactors in the U.S. of the same design as those at Fukushima. This list from the U.S. Nuclear Regulatory Commission shows which designs are Boiling Water or Pressurized Water reactors. Here is the list of Mark I BWRs in the country.
Browns Ferry 1,2,3 (W of Huntsville, AL); Brunswick 1,2, ( 40 miles W of Wilmington,NC), Cooper (23 miles south of Nebraksa City, NE), Dresden 2,3 (25 miles SW of Joliet, IL), Duane Arnold ( 8 miles NW of Cedar Rapids, IA), Fermi 2 (24 miles NE of Toledo, IL), FitzPatrick (6 miles NE of Oswego, NY), Hatch 1,2 (20 miles S of Vidalia, GA), Hope Creek 1 (18 miles SE of Wilmington, DE), Monticello (35 miles NW of Minneapolis, MN), Nine Mile Point 1 (6 miles NE of Oswego, NY), Oyster Creek (9 miles S of Toms River, NJ), Peach Bottom 2,3 (17.9 miles S of Lancaster, PA), Pilgrim 1 (38 miles SE of Boston, MA), Quad Cities 1,2 (20 miles NE of Moline, IL), Vermont Yankee (5 miles S of Brattleboro, VT).