The Democratic Republic of Congo (DRC) announced it is launching a formal investigation into massive quantities of undeclared uranium contaminating its cobalt exports.
Officials said they will test cobalt hydroxide shipments bound for China and establish a working group to review recent findings produced in investigations by the Financial Times, Lighthouse Reports, and Le Monde.
The Congolese government also plans to consult the International Atomic Energy Agency (IAEA) to arrange a technical support mission.
The controversy centers on the DRC's copper belt, where uranium naturally co-occurs with cobalt and copper.
While Kinshasa bans domestic uranium production today, researchers estimate that between 2,000 and 5,000 metric tons of natural uranium embedded in cobalt-hydroxide shipments exited the country between 2000 and 2024.
Sébastien Philippe, a nuclear security expert and co-author of a recently published "Nature Communications" study, noted that the undeclared exports present severe nuclear accounting blind spots. Because less than 10 percent of the material was publicly declared to the IAEA, no regulatory oversight tracks its final destination or end use.
“This quantity of undeclared uranium could be used to produce fissile material for roughly 600 to 1,500 nuclear weapons or fuel a standard light-water nuclear reactor for 10 to 25 years, so it’s quite a large amount,” Philippe said. “It could end up in a civilian nuclear energy program or in a military program, because nobody is going to ask where this uranium is going.”
According to the research, unless specific chemical processes extract it during refining, uranium inherently bonds with the crude cobalt hydroxide. The vast majority of these exports flow to China, which processes approximately 95 percent of global cobalt.
Once the crude material is refined into pure cobalt metal, the uranium is stripped out and becomes a highly valuable byproduct.
The IAEA, which tracks global uranium production, stated through an expert that the agency had no indications the DRC was failing to meet its safeguarding obligations. Low-grade uranium-bearing cobalt exports do not require reporting if they are for non-nuclear purposes.
Congolese officials disputed the study's methodology, arguing the estimates relied on broad modeling rather than direct measurements of exported shipments.
Despite questioning the numbers, Kinshasa confirmed it will spend the next 60 days assessing the health and environmental risks of the contamination. The review will be led by the DRC’s nuclear safety and energy agencies, working with both national and international laboratories.
The government also mandated the installation of radiation detectors for trucks crossing its borders.
The investigation also places intense scrutiny on operators like CMOC Group (OTCPL:CMCLF). Internal documents reviewed by the journalism consortium recorded uranium-rich cobalt samples at the site, including a peak concentration of 1,100 parts per million in December 2016, roughly 15 times the export limit cited by the investigation.
Further documents indicated significant uranium concentrations remained in the site's cobalt production as late as June 2021.
CMOC categorically disputed the findings, stating that all its cobalt hydroxide complies with Congolese regulations and international standards. The company also denied extracting or separating uranium in either the DRC or China.
The Congolese government also defended its historical track record, asserting that it has safely overseen the natural overlap of uranium and cobalt for over a century of industrial mining.
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Securities Disclosure: I, Giann Liguid, hold no direct investment interest in any company mentioned in this article.
