Nuclear

Delivering the nuclear promise of safe, reliable, and cost-effective power generation across more than half of the U.S. nuclear fleet.

Maintenance & Modifications

Our Total Accountability Model provides a single point of contact driving accountability across safety, human performance, cost, schedule, quality, and resource supply.

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Projects & Construction

Our teams are familiar with, and have worked on, virtually every primary and secondary plant system in both outage and non-outage environments, routinely executing critical and near-critical path work scopes.

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Condenser Services

As the largest condenser retubing contractor in the United States, we bring innovative and cost-effective services using the most advance methods, tooling, and equipment in the industry.

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Valve Services

Our diverse services include valve repair and repacking, AOV/MOV repair and diagnostic testing, safety relief valve testing and repair, training, and mobile and in-place machining.

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Scaffolding

From scaffolding design to decontamination and storage, our planning and implementation process is designed to reduce or consolidate scaffold use.

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Radiological Protection

Our radiological services include a comprehensive array of health physics, decontamination, and radiological support services and personnel.

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Security Screening

The Security Services management team offers more than 50 years of experience with NEI guidelines and compliance. D&Z is recognized for its innovative training program.

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Professional Technical Services

The Professional Technical Staffing business line specializes in providing cost-competitive workforce solutions to the power, process, and industrial markets.

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Facts About Nuclear Power

Nuclear is the number one source of carbon-free energy in the world.

Comprises 62% of the carbon-free energy output in the United States.

Industry operated at 92% reliability last year which was a new record.

Success Stories

Record diesel generator rebuild project
Featured Story

Record Diesel Generator Rebuild Project

While most nuclear sites were on furlough over the 2016 holiday season, Day & Zimmermann personnel at one nuclear station were helping a utility respond to a catastrophic failure of one of its emergency diesel generators (EDG). The team rebuilt the entire EDG from the ground up in less than 62 days.

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Bridge Crane Installation Project
Featured Story

Bridge Crane Installation Project

Day & Zimmermann (D&Z) provided management, supervision, and civil and electrical craft labor to install a 250-ton multiple-girder bridge crane at a nuclear power plant in 2015. The D&Z projects team as well as representatives from the utility received the Nuclear Energy Institute’s Top Industry Project (TIP) Maintenance Award for the innovative use of a gantry crane in the plant’s turbine building.

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