Title :
Turbogenerator flywheel for Alcator C-MOD
Author :
Murphy, John T. ; Ballinger, Ron ; Becker, Herbert ; Gwinn, David ; Mathew, Salim
Author_Institution :
MIT, Cambridge, MA, USA
fDate :
30 Sep-3 Oct 1991
Abstract :
At peak performance the Alcator C-MOD experiment at MIT will require pulses of up to 500 MJ over a 5-s period. This will be supplied by a commercial alternator supplemented by a 75-ton flywheel. When spun at 1800 rpm, the alternator-rotor combination stores a total kinetic energy of 2000 MJ. The safety analysis for the system must address several concerns, including fracture. To this end an extensive fracture mechanics analysis of the flywheel is being conducted. At present the initial flaw distribution has been determined by ultrasonic and magnetic particle examination. Material samples will be heat-treated to duplicate the thermal histories and properties of various locations within the single-piece forging. A program of materials tests, including crack growth and fracture toughness, is being conducted for use in predicting the life of the flywheel
Keywords :
Tokamak devices; cracks; energy storage devices; flaw detection; fracture mechanics; fracture toughness; fusion reactor materials; fusion reactor safety; fusion reactor theory and design; turbogenerators; ultrasonic materials testing; Alcator C-MOD; alternator-rotor combination; crack growth; flaw distribution; flywheel; fracture mechanics analysis; fracture toughness; magnetic particle examination; safety analysis; single-piece forging; ultrasonic examination; Alternators; Conducting materials; Flywheels; History; Kinetic energy; Magnetic analysis; Magnetic materials; Magnetic particles; Safety; Turbogenerators;
Conference_Titel :
Fusion Engineering, 1991. Proceedings., 14th IEEE/NPSS Symposium on
Conference_Location :
San Diego, CA
Print_ISBN :
0-7803-0132-3
DOI :
10.1109/FUSION.1991.218861
