Nuclear Power

Is Nuclear Power ever considered to be a Green Power or Carbon Offset source especially in the eyes of LEED? I highly doubt it, but I have recieved conflicting information from a client and wanted to confirm LEED's stance on Nuclear Power in general. In my research I have found that the EPA and Green-e Energy does says that nuclear power does not meet thier green power standards and yet, Green-e RECs are available in my client's cost estimate from thier utility provider. Something is amis and any input would be helpful. Much Appreciated!