U. S. is sending robotics and trained operators to attempt work in areas where radiation levels are dangerous. The remote-controlled machines have been used to conduct environmental cleanup, etc., in contaminated environments, although not on a compromised nuclear reactor.
In addition, the U. S. Energy department has sent 40 employees and 7710 kg of equipment to Japan.

Kyodo News says the Japanese government plans to spray a water-soluble resin over debris at the Fukushima Daiichi No. 1 plant to prevent radiation leaks from spreading further.

Industry minister Kaieda instructed nuclear plant operators to compile emergency safety measures to prevent radiation leaks in the event that their power and cooling devices fail.
Utilities, which operate 45 nuclear reactors nationwide excluding the Fukushima No. 1 and No. 2 plants, were instructed to compile a new safety manual and submit it to NISA by mid-April.
The Fukushima emergency developed because TEPCO could not immediately secure an alternative power source after the reactors cooling systems were disabled, or tap the huge amounts of water needed to cool spent fuel storage pools, the Ministry of Economy, Trade and Industry said.
Kaieda- "I want plant operators to place power supply vehicles to secure electricity and firetrucks to provide water to spent fuel storage pools and reactors in times of emergency."
Drastic new safety measures, including instructing operators to place a reserve electric system to pump seawater, and build seawalls to protect against tsunami, are requested.

Meanwhile, experts from French atomic fuel company Areva are offering advice and assistance in removing contaminated water accumulations.
Areva is the processor of the MOX fuel used in the Daiichi No. 3 reactor, shipped there in 1999.

Most of the above from the Japan Times, Thursday, March 31.