According to court documents, a nuclear forensic laboratory confirmed Ebisawa’s plutonium was weapons-grade material “suitable for use in a nuclear weapon.” ...

The paper’s title is “ Improved Disposition of Surplus Weapons-Grade Plutonium Using a Metallic Pu-Zr Fuel Design.” The paper was co-authored by Braden Goddard, Ph.D., Assistant Professor ...

Miller allegedly shipped out plutonium about 60 times between December 2020 and March 2025, FBI Special Agent Darrell Hunter said in the affidavit dated June 20.

China is building two advanced nuclear reactors with Russian assistance that will produce plutonium for Beijing’s rapid buildup of nuclear weapons, according to a new Air Force think tank study.

Plutonium-238 (238Pu) undergoes α- decay with a half-life of 87.7 years and an average ray energy of 5.49 MeV, which can continuously release heat and provide a heat source for this scenario ...

A light-water reactor could provide more weapons-grade plutonium, abetting the North Korean leader Kim Jong-un’s vow to expand his nuclear arsenal. By Choe Sang-Hun Reporting from Seoul In what ...