1.   Nevada, meanwhile, is fighting the proposed permanent repository at Yucca Mountain, aided by some environmental groups.

2.   The group last year opposed a bill authorizing the transport of spent nuclear fuel to Yucca Mountain, Nev., site of a proposed national repository.

3.   The proposed repository is vulnerable to seismic activity.

4.   The United States faced major technical problems with its proposed high-level waste repository site inside a mountain in Nevada, he noted.