Richland, WA

Energy Northwest

Federal mandates required the installation of a hardened containment vent system to protect the communities surrounding this nuclear power plant.

Exterior view of the Energy Northwest power plant

Value Delivered

In response to an order from the Nuclear Regulatory Commission (NRC), Energy Northwest needed to design and install an independent hardened containment vent system to maintain their operating license. With Intermech’s assistance, this project was completed on time and under budget.

Client Objectives

Due to the accident at the Fukushima Daiichi Nuclear Power Plant in Japan, the NRC required boiling water reactors (BWRs) in the United States to install a hardened containment vent system.  


Our team fabricated and installed large bore hardened containment vent piping from the reactor containment vessel through the facility and up the exterior wall of the reactor building. We also fabricated and installed a maintenance platform on the roof of the reactor building to provide access to service the hardened containment vent piping valve.

Client Background

Energy Northwest operates Columbia Generating Station, a 1,200 MW nuclear power plant with a BWR.