This legislation mandates that the Nuclear Regulatory Commission (NRC) initiate a rulemaking within 90 days of enactment to authorize the use of commercial-grade steel and concrete in non-safety-related structures at nuclear power plants. The primary goal is to streamline construction processes by permitting more common materials for components that do not directly impact core safety functions. However, the NRC retains the authority to require stricter material standards if it determines that such standards are necessary to address a specific safety risk. This determination must be based on whether not using stricter standards would be contrary to the common defense and security, and the adequate protection of public health and safety, as defined by the Atomic Energy Act of 1954.