Challenge: A de-Ionized water storage tank together with an emergency diesel generator are to be built on a foundation next the several buildings. The tank contains 160,000 gallons of useful water plus a five-feet depth water for minimum water head. The tank and...

Challenge: Our client is concerned about the vibration of a nuclear plant component known as a Generator Neutral Enclosure (NE). The NE is a hollow horizontal aluminum cylinder, 58" diameter and 146" long. The NE shell construction consists of several plates bolted...

Challenge: To analyze the structural integrity of a nuclear fuel transfer cask design during hypothetical accident drop conditions that may occur during transport. The design must ensure that the spacing between the nuclear fuel rods is maintained after being dropped...

Challenge: New lightning arresters are required at a power plant. HEA was approached to perform an IEEE seismic qualification evaluation to demonstrate dynamic performance compatibility for as-tested versus as-installed configuration. Resolution: Our engineering team...

The cooling coil for a nuclear power plant requires replacement. HEA was engaged to evaluate a coil design to meet the ASME code requirements for structural adequacy. Resolution: Our engineering team used a combination of hand calculations and finite element model...

Challenge: Two pressure vessels will be installed at a Laboratory in Menlo Park, CA. In accordance with a client provided seismic design criteria, HEA has been tasked with computing the seismic demand loads for all of the systems and components in addition to the...

Challenge: The existing pumps need to be analyzed for seismic fragility. The developed seismic fragility will be performed using a 5% damped spectral acceleration. Resolution: The pumps were evaluated for the possible failure modes based on the design calculation. The...

Challenge: To evaluate the structural adequacy of a nuclear fuel transfer cask pedestal during lifting and seismic event loading. Resolution: Our engineering team created a detailed finite element model of the transfer cask pedestal which consists of a hexagonal steel...

Challenge: Our client required a structural analysisof a new air-cooled heat exchanger assembly to be installed in Peru. The purpose of the assessment was to investigate whether the current design of the steel structure met the structural code requirements when...

HEA performed a dynamic non-linear time history earthquake analysis of a turbine building structure, exhaust piping, and pipe support gaps. From the global model, we extracted time history column end forces and moments for overstressed members and used the data to...