Radiation containment domes at Japan’s Fukushima Dai-Ichi nuclear reactors are intact and the situation at the plant “is on the verge of stabilizing,” a U.S. Nuclear Regulatory Commission official said.

“Containment at units 1, 2 and 3 appear to be functional,” Bill Borchardt, executive director for operations at the agency, said today during a meeting at the agency’s headquarters in Rockville, Maryland.