Russia Likely Conducting Low-Yield Nuclear-Weapons Tests, Intel Chief Says

Lt. Gen.
Robert Ashley, director of the Defense Intelligence Agency, said
Wednesday that Russia is likely conducting low-yield nuclear-weapons tests.

That’s an
indication that Russia doesn’t share the same understanding of the Comprehensive
Test Ban Treaty that the U.S. does.

In the United States’ understanding, the test-ban treaty prohibits any nuclear-weapons experiments that produce yield.

�As a consequence, the United States ceased all
yield-producing experiments and instead relies on computer simulations and experiments
that don’t produce yield. �Since 1992,
the U.S. has not tested nuclear weapons. The treaty itself does not define what
constitutes a nuclear-weapons test-one of its major flaws that led to the
treaty’s rejection by the U.S. Senate in 1999.

According to Ashley, Russia “probably is not adhering to its nuclear-testing moratorium in a manner consistent with the zero-yield standard.”

Ashley’s remarks are the first U.S. government official’s
suggestion that Russia’s nuclear-warhead modernization activities are inconsistent
with the U.S. understanding of the treaty.

Russia’s activities inconsistent with the U.S. understanding of the test-ban treaty have been discussed previously, including in the 2009 Strategic Posture Commission Report and in the 2012 National Research Council report on the treaty.

When the Comprehensive Test Ban Treaty was negotiated in the late 1990s, the directors of the U.S. nuclear laboratories asked to be able to conduct experiments below one kiloton to ensure U.S. nuclear weapons operate as expected. The Clinton administration prohibited them from doing so and the restriction remained in place.

Unlike Russia and China, the United States is not building
new nuclear warheads. Instead, it conducts life-extension programs on existing
warheads, the average age of which is almost 30 years.

That means that the majority of weapons scientists and engineers who actually have any experience of fielding new-design nuclear warheads are either dead or retired (or very close to it).

It was not until fiscal year 2016 that Congress established
the Stockpile Responsiveness Program aimed at building up and exercising all
capabilities to “conceptualize, study, design, develop, engineer, certify,
produce, and deploy nuclear weapons.”�

The Trump administration requested $34 million for the effort
in fiscal 2019, the first time a substantive amount of money has been requested
for the program.

The United States would have a lot to gain from conducting very-low-yield nuclear-warhead experiments. For example, it could further validate computer codes it uses to make judgments about impacts of aging on nuclear warheads. It could improve the proficiency of people in charge of the U.S. nuclear-warhead stockpile and increase overall flexibility and resiliency of the U.S. nuclear posture.

It also potentially could lead to a better understanding of what kind of warhead-modernization activities adversaries and competitors can do using the latest technologies and low-yield experiments.

The United States must think long and hard about what Russian and Chinese nuclear-warhead modernization activities mean for a long-term viability of current U.S. approaches to the maintenance of its nuclear stockpile.

By not conducting any nuclear experiments, the U.S. is potentially forgoing military advantages that it now appears the Russians aren’t.

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