Davis-Besse Shield Building Investigation

CTLGroup has assisted FirstEnergy in evaluation and monitoring of laminar cracks present in the Shield Building at Davis Besse Nuclear Power Station. CTLGroup was onsite when cracks were first identified and assisted the client by identifying nondestructive techniques that would be useful in identifying the presence of cracks within the structure. CTLGroup has een commissioned yearly to assist FirstEnergy with their commitment to the Nuclear Regulatory Commission to monitor the cracks. CTLGroup has also developed new methods for inspecting bored penetrations in the Shield Building for measuring crack growth.


Buildings & Facilities

Energy & Resources

Consulting Services

Structural Engineering + Evaluation

Non-Destructive Evaluation

Structural Condition Assessment

Laboratory Services

Specialized Testing

The Davis–Besse Nuclear Power Station was the location of two of the top five most dangerous nuclear power incidents in the United States since 1979.


Hours Worked


Commission Date


Site Area (Acres)

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