But he said the experience of other industries , such as aerospace or the U.S. nuclear submarine program , shows costs can drop significantly over the life of a program . The Energy Department expressed support for small modular reactor design . They say the units will be cheaper and safer than current reactors . U.S. scientists are still reviewing the design .
The Energy Department expressed support for small modular reactor design . They say the units will be cheaper and safer than current reactors . U.S. scientists are still reviewing the design .