The U.S. Nuclear Regulatory Commission (NRC) granted Constellation Energy Generation, LLC an exemption regarding their LaSalle County Station in Illinois. This exemption permits the storage of spent nuclear fuel in a special type of cask that doesn't fully comply with existing certification requirements. The NRC determined this is safe and doesn't pose a threat to public safety or security. Without this exemption, the company would face operational challenges and increased safety risks, including potential delays and additional radiation exposure.
Simple Explanation
Constellation Energy got special permission from the government to use a different type of container for holding used nuclear fuel at their power plant. This new container doesn't meet all the usual rules, but the officials say it's still safe for people.