The Nuclear Regulatory Commission (NRC) is amending its regulations to reduce reporting requirements currently imposed on water-cooled nuclear power reactor, research and test reactor, and nuclear material licensees. This rule reduces the regulatory burden on NRC licensees; and partially implements a recent NRC initiative to revise or eliminate duplicative or unnecessary reporting requirements. The amendments will: Eliminate the current requirement for licensees to submit summary reports of containment leakage rate tests to the NRC (10 CFR Part 50--Appendix J), but preserve the requirements in Secs. 50.72 and 50.73 under which licensees currently report any instances of leakage exceeding authorized limits in the technical specifications of the license; revise 10 CFR 55.25 to refer licensees to a similar reporting requirement in 10 CFR 50.74(c) and require notification of operator incapacity only in case of permanent disability or illness; and eliminate the requirement for quarterly submittal of safeguards event logs presently contained in 10 CFR 73.71(c)(2) and Appendix G to Part 73.