Since all of the major components of a nuclear power plant are joined by welding in accordance with Section 111of the ASME Pressure Vessel Code, welding plays an important role in the delivery of nuclear power. Nuclear plant piping systems account for most of the welding, but it is also a major application in the reactors, steam generators, pressure vessels, and containment vessels, as well as the powerhouse structures; all are welded to specifications in Section 111.

More engineering analysis, more care, and more safeguards are in place in the design and construction of nuclear plants than in any other method of power generation. The United States Nuclear Regulatory Commission is involved directly in the design, construction, licensing and operation of plants.

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