Seismic Testing of Typical Containment Piping Penetration Systems.

摘要

The report provides the results of seismic tests of three typical light water reactor containment penetration systems to provide a technical basis for the support and development of equipment qualification procedures. The three systems tested were: (a) An eight-inch gate valve system modeling a containment spray system; (b) An eight-inch butterfly valve system modeling a purge and vent system; and (c) A two-inch globe valve system modeling the numerous small bore piping systems that are often characterized by high valve to pipe size ratio. The valve types, sizes, piping configurations, penetrations and supports used for the tests are typical of those found in commercial U.S. nuclear power plants for containment isolation applications. The three systems tested were mounted in a fixture and excited with simulated seismic loads. The loads imposed during the tests were equal or greater than those expected during U.S. operating-basis and safe-shutdown earthquakes. The test results indicate that adverse valve, penetration, or piping system behavior during typical seismic events is very unlikely.