In-house inspection of a service water pipe elbow revealed thinning of the pipe walls due to erosion and/or corrosion. HEA mapped measurements taken of the wall thinning onto a detailed finite element model of the elbow. Analysis of this model indicated that stresses...

A Motor Operated Valve was replaced with a heavier valve, requiring reanalysis of the Pressurizer Valve Piping. HEA performed a Class 1 piping analysis considering dynamic fluid transient loading and thermal stratification effects.

The actual number of loss of letdown thermal transients was found to exceed the design number of transients for a charging nozzle. HEA performed a Class I evaluation of the charging nozzle using thermal transient heat flow and stress analyses.

HEA determined the seismic displacement of a suspended crane hook load as part of an ISFSI project. Impact of a hook load into the structure was a primary concern. HEA used a computer model to accurately represent the crane, surrounding superstructure, and ground...

HEA evaluated the structural integrity of the Dry Shielded Canister (DSC) and internals when subjected to an accident-scenario side-drop. Non-linear effects such as material plasticity, contact, and time-history loading were considered.

Crack indications were found at thermal joints of a containment polar crane rail. An ASME Section XI Code based fracture mechanics life evaluation for various crack orientations was performed using stresses found by finite element analysis.

Vibrations in a plant main steam line caused repeat support failures. HEA identified the vibration source and designed visco dampers to mitigate the vibrations.