WEST PALM BEACH, Fla. (AP) — New tests of the U.S. nuclear weapons system ordered by President Donald Trump will not include nuclear explosions, Energy Secretary Chris Wright said Sunday.

It was the first clarity from the Trump administration since the president took to social media last week to say he had “directed the War Department to begin testing our nuclear weapons on a level playing field.”

“I think the tests we’re talking about now are tests of the system,” Wright said in an interview on News’ “Sunday Briefing.” “These are not nuclear explosions. They are what we call non-critical explosions.”

Wright, whose agency is responsible for the testing, added that the planned tests involve “all the other parts of a nuclear weapon to make sure they deliver the proper geometry and set up the nuclear explosion.”

WASHINGTON, DC - NOVEMBER 02: Secretary of Energy Chris Wright (L) visits
WASHINGTON, DC – NOVEMBER 2: Secretary of Energy Chris Wright (L) visits “The Sunday Briefing” with Peter Doocy at the News DC office on November 2, 2025 in Washington, DC. (Photo by Paul Morigi/Getty Images)

Paul Morigi via Getty Images

Confusion over Trump’s intention began minutes before he held a critical meeting in South Korea with Chinese President Xi Jinping. Trump took to his Truth Social platform and appeared to suggest he was preparing to scrap a decades-old U.S. ban on testing the country’s nuclear weapons.

Later that day, as he returned to Washington, Trump played coy about whether he really meant 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 much more routine.

On Friday he was opaque when reporters asked him if he intended to resume underground nuclear detonation tests.

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

The U.S. military periodically tests its missiles capable of carrying a nuclear warhead, but has not detonated the weapons since 1992. The Comprehensive Nuclear Test Ban Treaty, which the United States signed but did not ratify, has been observed since its adoption by all nuclear-weapons countries, North Korea being the only exception.

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Trump announced his plans to conduct nuclear tests after Russia announced it had tested a new atomic-powered, nuclear-capable submarine drone and a new nuclear-powered cruise missile.

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

However, the Kremlin warned that if the United States resumes testing its weapons, Russia will too, an escalation that would reignite Cold War-era tensions.