Test reactor pivotal to nuclear power’s future
IDAHO NATIONAL LABORATORY, IDAHO — A nuclear test reactor that can melt uranium fuel rods in seconds is running again after a nearly quarter-century shutdown as U.S. officials try to revamp a fading nuclear power industry with safer fuel designs and a new generation of power plants.
The reactor at the U.S. Energy Department’s Idaho National Laboratory has performed 10 tests on nuclear fuel since late last year.
“If we’re going to have nuclear power in this country 20 or 30 years from now, it’s going to be because of this reactor,” said J.R. Biggs, standing in front of the Transient Test Reactor he manages that in short bursts can produce enough energy to power 14 million homes.
The reactor was used to run 6,604 tests from 1959 to 1994, when it was put on standby as the United States started turning away from nuclear power amid safety concerns.
Restarting it is part of a strategy to reduce U.S. greenhouse gas emissions by generating carbon-free electricity with nuclear power initiated under the Obama administration and continuing under the Trump administration.
Some nuclear plants have closed in recent years, and Illinois, New York and New Jersey have approved subsidies in the past two years to bail out commercial nuclear plants. Officials in some areas are considering carbon taxes on coal and natural gas to boost nuclear power.
U.S. officials hope to improve nuclear power’s prospects. They face two main challenges: making the plants economically competitive
According to the U.S. Energy Information Administration, 98 nuclear reactors at 59 power plants produce about 20 percent of the nation’s energy.
Most of the reactors are decades old, and many are having a tough time competing economically with other forms of energy production, particularly cheaper gas-fired power plants. and changing public perception among some that nuclear power is unsafe.
Biggs said Japan’s Fukushima nuclear disaster, caused by a 2011 earthquake and tsunami, was a primary reason U.S. officials restarted the test reactor in Idaho. The cores of three reactors at the Japan plant suffered meltdowns after cooling systems failed.
But what if, researchers say, nuclear plants produced energy with accident-tolerant fuels in reactors designed to safely shut themselves down in an emergency? That’s where the Idaho lab’s test reactor comes in.
Dan Wachs, who directs the lab’s fuel safety research program, said only three other reactors with fuel-testing abilities exist — in France, Japan and Kazakhstan. He said none can perform the range of experiments that can be done at the Idaho lab’s Transient Test Reactor, also called TREAT.
“The world is suffering from a very acute shortage of testing that TREAT fills,” he said.
At the Idaho test reactor, pencil-sized pieces of fuel rods supplied by commercial manufacturers are inserted into the reactor that can generate short, 20-gigawatt bursts of energy. Workers perform tests remotely from about half a mile away.
The strategy is to test the fuels under accident conditions, including controlled and contained meltdowns, to eventually create safer fuels.