Defense Ministry official Ippo Maeyama said the ministry has dispatched dozens of troops trained for chemical disasters to the Fukushima plant in case of a radiation leak, along with four vehicles designed for use in atomic, biological and chemical warfare.
Pineville, La., resident Janie Eudy said her husband, Danny, was working at Fukushima No. 1 when the earthquake struck. After a harrowing evacuation, he called her several hours later from the parking lot of his quake-ravaged hotel.
He and other American plant workers are "waiting to be rescued, and they're in bad shape," she said in a telephone interview.
Danny Eudy, 52, a technician employed by Pasadena, Texas-based Atlantic Plant Maintenance, told his wife that the quake violently shook the plant building he was in. "Everything was falling from the ceiling," she said.
Eudy told his wife that he and other workers were evacuating the plant when the tsunami swept through the area, carrying away homes and vehicles. They retreated so they wouldn't get caught up in the raging water.
"He walked through so much glass that his feet were cut. It slowed him down," she said.
After the water started to recede, Eudy and other workers drove to their hotel, only to find it in shambles.
"Most of the hotel was gone," she said. "He said the roads were torn up and everything was a mess."
His hotel room was demolished along with all of his belongings, so Eudy had to borrow a resident's phone to call his wife early Friday morning.
The workers were waiting for daylight but contemplating seeking higher ground in case another big wave hit.
"He sounded like he was in shock. He was scared," Janie Eudy said. "They're totally on their own, trying to just make it."
Neil Sheehan, a spokesman for the U.S. Nuclear Regulatory Commission, said staff were trying to collect more information on what was happening.
At the Fukushima Daiichi site, "They are busy trying to get coolant to the core area," Sheehan said. "The big thing is trying to get power to the cooling systems."
Speaking at the White House, Secretary of State Hillary Clinton also said U.S. Air Force planes were carrying "some really important coolant" to the site, but administration officials later said she misspoke. The U.S. offered such help but the Japanese said they didn't need it, the officials said, speaking on condition of anonymity because they were not authorized to speak publicly on the matter.
High-pressure pumps can temporarily cool a reactor in this state with battery power, even when electricity is down, according to Arnold Gundersen, a nuclear engineer who used to work in the U.S. nuclear industry. Batteries would go dead within hours but could be replaced.
The nuclear reactor was among 10 in Japan shut down because of the earthquake.
The Fukushima plant is just south of the worst-hit Miyagi prefecture, where a fire broke out at another nuclear plant. The blaze was in a turbine building at one of the Onagawa power plants. Smoke could be been coming out of the building, which is separate from the plant's reactor, Tohoku Electric Power Co. said. The fire has since been extinguished.
Another reactor at Onagawa was experiencing a water leak. The U.S. Geological Survey said the 2:46 p.m. quake was a magnitude 8.9, the biggest earthquake to hit Japan since officials began keeping records in the late 1800s.
A tsunami warning was issued for a number of Pacific, Southeast Asian and Latin American nations.
At the two-reactor Diablo Canyon plant at Avila Beach, Calif., an "unusual event" — the lowest level of alert — was declared in connection with a West Coast tsunami warning. The plant remained stable, though, and kept running, according to the NRC.
