H. R. 7172, also known as the "100 Year Canister Life Act," mandates that the Nuclear Regulatory Commission establish rules preventing the issuance or renewal of licenses for storage systems or facilities of spent nuclear fuel, unless they are proven safe for at least 100...
Simple Explanation
The bill says that new permits to store used nuclear fuel, which is dangerous stuff left over from making energy, can only be given out if it's proven safe for at least 100 years. It also asks for people's opinions before making these safety rules final.