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radiation
New Worries at Chernobyl After IAEA Finds Radiation Shield Has 'Lost Primary Safety Functions'
"Timely and comprehensive restoration remains essential to prevent further degradation and ensure long-term nuclear safety," said IAEA director general Rafael Mariano Grossi.
Dec 08, 2025
A protective shield built over the remains of the Chernobyl nuclear power plant in Ukraine is no longer capable of blocking radiation, the International Atomic Energy Agency warned late last week.
In a statement published on Friday, the IAEA said that its researchers have confirmed that the New Safe Confinement (NSC) shield has "lost its primary safety functions," including the ability to confine radiation, after it was damaged by a Russian drone strike in February.
On the positive side, the researchers found "no permanent damage" to the system's load-bearing structures and monitoring systems. Nonetheless, IAEA director general Rafael Mariano Grossi said that urgent work needed to be done to rebuild the shield.
"Limited temporary repairs have been carried out on the roof, but timely and comprehensive restoration remains essential to prevent further degradation and ensure long-term nuclear safety," he emphasized.
Grossi noted that IAEA had a permanent team working at the site and vowed that the agency "will continue to do everything it can to support efforts to fully restore nuclear safety and security at the Chernobyl site."
Shaun Burnie, a senior nuclear specialist at Greenpeace, told the New York Times that the damage caused to the NSC isn't cause for immediate concern, although that would change if the damage to the shield went without repairs for a long period of time.
"If there was to be some event inside the shelter that would release radioactive materials into the space inside the New Safe Confinement, because this facility is no longer sealed to the outside environment, there’s the potential for radiation to come out," said Burnie. "I have to say I don’t think that’s a particularly serious issue at the moment, because they’re not actively decommissioning the actual sarcophagus."
The NSC was first put into place in 2016 to enclose the emergency sarcophagus over Chernobyl's number 4 nuclear reactor that was constructed by Soviet officials in the wake of the 1986 disaster at the nuclear plant.
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Groups Warn Trump Executive Orders Would Spike Cancers Caused by Exposure to Nuclear Radiation
A letter implored the Nuclear Regulatory Commission to "stand up to the executive order’s marching orders to 'promote' nuclear power."
Nov 14, 2025
A series of nuclear power-related executive orders issued by President Donald Trump seek to legitimize people's "suffering as the price of nuclear expansion," said one expert at Beyond Nuclear on Friday, as the nongovernmental organization spearheaded a letter to the Nuclear Regulatory Commission and top Trump administration officials warning of the public health risks of the orders.
More than 40 civil society groups—including Physicians for Social Responsibility (PSR), Sierra Club, Nuclear Watch South, and the Appalachian Peace Education Center—signed the letter to the commission, calling on officials not to revise the NRC's Standards for Protection Against Radiation, as they were directed to earlier this year by Trump.
"NRC has not made a revision yet, and has been hearing that the Part 20 exposure (external only) should be taken from the existing 100 mr [milliroentgen] a year, per license, to 500 mr a year, and in view of some, even to 10 Rems [Roentgen Equivalent Man], which would be 100 times the current level," reads the letter.
In 2021, noted PSR, the NRC "roundly rejected" a petition "to raise allowable radiation exposures for all Americans, including children and pregnant women, to 10 Rems a year."
The revision to radiation limit standards would result in anywhere from 5-100 times less protection for Americans, said the groups, with 4 out of 5 adult males exposed over a 70-year lifetime developing cancer that they otherwise would not have.
"Radiation is dangerous for everyone,” said Amanda M. Nichols, lead author of the 2024 study Gender and Ionizing Radiation. “[Trump’s] executive order will allow the industry to relax the current standards for radiological protection, which are already far from adequate. This will have detrimental health consequences for humans and for our shared environments and puts us all at higher risk for negative health consequences. ”
The change in standards would be even more consequential for women, including pregnant women, and children—all of whom are disproportionately susceptible to health impacts of ionizing radiation, compared to adult males.
"Radiation causes infertility, loss of pregnancy, birth complications and defects, as well as solid tumor cancer, leukemia, non-cancer outcomes including cardiovascular disease, increased incidence of autoimmune disease, and ongoing new findings.”
In Gender and Ionizing Radiation, Nichols and biologist Mary Olson examined atomic bomb survivor data and found that young girls "face twice the risk as boys of the same age, and have four to five times the risk of developing cancer later in life than a woman exposed in adulthood."
Despite the risks to some of the country's most vulnerable people, Trump has also called for a revision of "the basis of the NRC regulation," reads Friday's letter: the Linear No Threshold (LNT) model, the principle that there is no safe level of radiation and that cancer risk to proportional to dose.
The LNT model is supported by decades of peer-reviewed research, the letter states, but one of Trump's executive orders calls for "an additional weakening of protection by setting a threshold, or level, below which radiation exposure would not 'count' or be considered as to have not occurred."
The Standards for Protection Against Radiation are "based on the well-documented findings that even exposures so small that they cannot be measured may, sometimes, result in fatal cancer," reads the letter. "The only way to reduce risk to zero requires zero radiation exposure."
Trump's orders "would undermine public trust by falsely claiming that the NRC’s radiation risk models lack scientific basis, despite decades of peer-reviewed evidence and international consensus supporting the LNT model," it adds.
The signatories noted that the US government could and should strengthen radiation regulations by ending its reliance on "Reference Man"—a model that the NRC uses to create its risk assessments, which is based on a young adult male and fails to reflect the greater impact on infants, young children, and women.
“Newer research has shown that external radiation harms children more than adults and female bodies more than male bodies," reads the letter. "Existing standards should therefore be strengthened to account for these life-stage and gender disparities… not weakened. Radiation causes infertility, loss of pregnancy, birth complications and defects, as well as solid tumor cancer, leukemia, non-cancer outcomes including cardiovascular disease, increased incidence of autoimmune disease, and ongoing new findings.”
Olson, who is the CEO of the Generational Radiation Impact Project, which also helped organize the letter, warned that "radiation causes cancer in women at twice the rate of adult men, while the same exposure in early childhood, will, across their lifetimes, produce seven times more cancer in young females, and four times more in young males.”
The groups emphasized that "executive orders do not have the power to require federal agencies to take actions that violate their governing statutes, nor to grant them powers and authorities that contradict those governing statutes. The NRC needs to stand up to the executive order’s marching orders to 'promote' nuclear power—a mission outside its legal regulatory mandate under the Energy Reorganization Act of 1974 and the concurrent amendments to the Atomic Energy Act."
Federal agencies including the NRC, they added, "should not favor industry propaganda asserting that some radiation is safe over science-based protection of the public. This is a deliberate subversion of science and public health in favor of corporate interests."
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UN Nuclear Chief Warns Israel's Bombing of Iranian Facility Risks Radiation Release
IAEA head Rafael Grossi implored "all parties to exercise maximum restraint to avoid further escalation."
Jun 16, 2025
The head of the United Nations nuclear watchdog cautioned Monday that Israel's bombing of Iran's primary uranium enrichment facility raises the risk of radiological and chemical contamination, a warning that came amid condemnation of such strikes and mounting civilian casualties on both sides of the widening war.
Addressing an emergency session of the International Atomic Energy Agency's Board of Governors in Vienna, IAEA Director General Rafael Grossi said that "military escalation threatens lives, increases the chance of a radiological release with serious consequences for people and the environment, and delays indispensable work towards a diplomatic solution for the long-term assurance that Iran does not acquire a nuclear weapon."
"Last week the board adopted an important resolution on Iran's safeguards obligations," Grossi continued. "The resolution, while containing important proliferation-related provisions, also stressed support for a diplomatic solution to the problems posed by the Iranian nuclear program. Member states of the IAEA have a crucial, active role to play in supporting the urgent move away from military escalation towards diplomacy."
"Consistent with the objectives of the IAEA and its statute, I call on all parties to exercise maximum restraint to avoid further escalation," he added.
Based on info available to the IAEA, this is the current situation at the Iranian nuclear sites in Natanz, Fordow, Khondab, Bushehr, and Esfahan. pic.twitter.com/gTvJrYzPFW
— IAEA - International Atomic Energy Agency ⚛️ (@iaeaorg) June 16, 2025
The IAEA affirmed that Israeli strikes have damaged above-ground areas of the uranium enrichment facility at Natanz and another nuclear site in Isfahan. Grossi said earlier that four buildings in Isfahan had been damaged by Israeli strikes on Friday, but noted Monday that there were no apparent signs of damage to another enrichment plant at Fordow, which is deep underground.
Experts say it would likely take intervention by the United States—which has more powerful bunker-busting bombs than Israel—to destroy the Fordow site. U.S. President Donald Trump said Sunday that "it's possible" that American forces could enter the fight, while the apparent deployment of what The Times of Israel on Monday called an "unprecedented" number of U.S. Air Force aerial refueling planes fueled speculation of deeper American involvement in the war.
Grossi's warning came amid widening Israeli bombing of Iran and retaliatory Iranian strikes against Israel. Iran's Ministry of Health said Monday that 224 people—90% of them civilians—have been killed and over 1,400 others wounded by Israeli attacks. Iranian media reported serious damage to a hospital in the western city of Kermanshah following Israeli bombing.
Last week, Israel began bombing Iranian government, military, and nuclear sites and assassinating numerous Iranian nuclear scientists. Some of these attacks have also killed targeted scientists' relatives, neighbors, and other civilians. The far-right government of Israeli Prime Minister Benjamin Netanyahu says Israel is attacking Iran in order to prevent the country from developing nuclear weapons. However, critics note that U.S. intelligence agencies concur that Iran is not trying to develop nukes.
As is the case with Gaza—where Israel is waging a war for which Netanyahu is wanted by the International Criminal Court for alleged crimes against humanity and war crimes—numerous observers accuse the Israeli leader of creating a distraction from his ongoing criminal corruption trial in his own country.
On Monday, Iranian Foreign Ministry spokesperson Esmaeil Baghaei said that Iran's legislative body, the Majlis, was drafting a bill that would withdraw the country from the landmark 1968 Treaty on the Nonproliferation of Nuclear Weapons.
Meanwhile, at least 23 Israeli civilians including women and children and Palestinian citizens of Israel have been killed by Iranian missile and drone strikes that have been condemned as indiscriminate. Hundreds more Israelis have been wounded. Responding to these attacks, Israeli Defense Minister Israel Katz—who is accused of supporting genocidal policies in Gaza—said over the weekend that Iran's capital "will burn" if Iranian forces did not stop responding to Israel's bombing.
"The residents of Tehran will pay the price, and soon," he vowed.
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