Replacement of LP-turbine rotors in nuclear power stations; Dresden and Quad Cities

Conference · Fri Jan 01 04:00:00 EST 1988 · Proceedings of the American Power Conference; (USA)

OSTI ID:7049206

Pizzica, J ^[1]; Bertilsson, J E; Thommen, E ^[2]

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1. Commonwealth Edison Co., Chicago, IL (USA)
2. Asea Brown Boveri Ltd., Baden (SW)

In the late 1970's, ultasonic analysis indentified several indications in the bore regions of nuclear low pressure turbine rotors of the shrunk-on wheel design. Though these early indications were not believed to be stress corrosion cracks, the manufacturers of these low pressure turbine rotors recommended routine in-service inspections as a precautionary measure. As a result of these in-service inspections, ultrasonic indications were identified in the bore and keyway regions of several LP rotors of this design. Included among these was Quad Cities, Unit 2, whose ultrasonic inspections revealed indications in several of the inner four wheels of each LP-flow. The authors report on how the shrunk-on LP-turbine rotors were replaced with an integral wheel design at the Quad Cities and Dresden power stations.

• OSTI ID: 7049206
• Report Number(s): CONF-880403--
• Conference Information: Journal Name: Proceedings of the American Power Conference; (USA) Journal Volume: 50
• Country of Publication: United States
• Language: English

Related Subjects

22 GENERAL STUDIES OF NUCLEAR REACTORS
220200 -- Nuclear Reactor Technology-- Components & Accessories
220400* -- Nuclear Reactor Technology-- Control Systems
ACOUSTIC TESTING
CHEMICAL REACTIONS
CORROSION
CRACKS
DESIGN
IN-SERVICE INSPECTION
INSPECTION
MATERIALS TESTING
NONDESTRUCTIVE TESTING
NUCLEAR FACILITIES
NUCLEAR POWER PLANTS
POWER PLANTS
REACTOR COMPONENTS
REACTOR MONITORING SYSTEMS
ROTORS
STRESS CORROSION
TESTING
THERMAL POWER PLANTS
ULTRASONIC TESTING