WEST PALM BEACH, Fla. (AP) — Newly ordered examinations of America’s nuclear arsenal, initiated by President Donald Trump, will not involve detonating any nuclear devices, according to Energy Secretary Chris Wright on Sunday.

This announcement marks the first detailed clarification from the Trump administration following the president’s social media declaration last week, in which he mentioned instructing the “Department of War” to ensure nuclear weapons testing is conducted on par with other nations.

During an appearance on Fox News’ “Sunday Briefing,” Wright explained, “The tests we are discussing now focus on the system as a whole. These do not involve nuclear detonations but are what we refer to as noncritical explosions.”

Wright further specified that the upcoming tests will assess various components of a nuclear weapon to ensure they achieve the intended configuration and properly initiate a nuclear detonation.

The ambiguity surrounding Trump’s statement arose just before a significant diplomatic meeting in South Korea with Chinese President Xi Jinping. On his Truth Social platform, Trump appeared to hint at potentially ending a longstanding U.S. ban on nuclear weapons testing.

Later that day, as he made his way back to Washington, Trump was coy on whether he really meant to say he was ordering the resumption of explosive testing of nuclear weapons — something only North Korea has undertaken this century — or calling for the testing of U.S. systems that could deliver a nuclear weapon, which is far more routine.

He remained opaque on Friday when asked by reporters about whether he intended to resume underground nuclear detonation tests.

“You’ll find out very soon,” Trump told reporters aboard Air Force One on Friday, as he headed to Florida for a weekend stay.

The U.S. military regularly tests its missiles that are capable of delivering a nuclear warhead, but it has not detonated the weapons since 1992. The Comprehensive Nuclear Test Ban Treaty, which the U.S. signed but did not ratify, has been observed since its adoption by all countries possessing nuclear weapons, North Korea being the only exception.

Trump announced his plans for nuclear tests after Russia announced it had tested a new atomic-powered and nuclear-capable underwater drone and a new nuclear-powered cruise missile.

Russia responded to Trump’s nuclear testing comments by underscoring that it did not test its nuclear weapons and has abided by a global ban on nuclear testing.

The Kremlin warned though, that if the U.S. resumes testing its weapons, Russia will as well — an intensification that would restart Cold War-era tensions.