Two of the many elements contributing to the safety of nuclear power are emergency response and the feedback from operating experience into plant operations. These are achieved partly by the licensee event reporting requirements of Title 10 of the Code of Federal Regulations (10 CFR) 50.72, "Immediate Notification Requirements for Operating Nuclear Power Reactors," and 10 CFR 50.73, "Licensee Event Report System." In 10 CFR 50.72, the U.S. Nuclear Regulatory Commission (NRC) provides for immediate notification requirements through the emergency notification system, and in 10 CFR 50.73 provides for 60-day written licensee event reports.