SMRs and AMRs

Monday, February 10, 2014

Nuclear Waste Solution Seen in Desert Salt Beds

By MATTHEW L. WALD, NYT
FEB. 9, 2014

CARLSBAD, N.M. — Half a mile beneath the desert surface, in thick salt beds left behind by seas that dried up hundreds of millions of years ago, the Department of Energy is carving out rooms as long as football fields and cramming them floor to ceiling with barrels and boxes of nuclear waste.

The salt beds, which have the consistency of crumbly rock so far down in the earth, are what the federal government sees as a natural sealant for the radioactive material left over from making nuclear weapons.

The process is deceptively simple: Plutonium waste from Los Alamos National Laboratory and a variety of defense projects is packed into holes bored into the walls of rooms carved from salt. At a rate of six inches a year, the salt closes in on the waste and encapsulates it for what engineers say will be millions of years.

“It’s eternity,” said Dirk Roberson, a guide for the frequent tours the Energy Department gives to visitors to the salt mine, who leave with a souvenir plastic bag filled with chunks of salt pressed into rocklike form.

(More here.)

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