• Proceedings of the Korean Nuclear Society Conference
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• 2001.05a
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• pp.248.1-248
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• 2001

• Proceedings of the Korean Nuclear Society Conference
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• 2001.05a
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• pp.234.1-234
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• 2001

• Proceedings of the Korean Nuclear Society Conference
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• 2003.05a
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• pp.172-172
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• 2003

• Proceedings of the Korean Nuclear Society Conference
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• 2001.10a
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• pp.163.1-163
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• 2001

• Proceedings of the Korean Nuclear Society Conference
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• 2001.10a
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• pp.175.1-175
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• 2001

• Proceedings of the Korean Nuclear Society Conference
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• 1999.10a
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• pp.165.1-165
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• 1999

• Proceedings of the Korean Nuclear Society Conference
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• 1999.10a
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• pp.267.1-267
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• 1999

• Journal of Advanced Marine Engineering and Technology
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• v.29 no.5
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• pp.571-578
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• 2005

Stresses of main stop valve and control valve casings for the steam turbines of power plants are analyzed by the finite element method. The stress intensity is obtained to check the results on the basis of the design criteria of ASME boiler and pressure vessel code. To verify accuracy of the finite element analysis. analyzed stresses are compared with those measured during the hydrostatic pressure test. Stress category drawings. which play an important role in evaluating casting defects, are produced from the analysis results, and important points in casting of the valve casings are discussed in terms of the stress category.

• Proceedings of the Korean Institute of Intelligent Systems Conference
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• 2003.09a
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• pp.525-530
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• 2003

This paper focuses on design of nonlinear power plant controller using immune based multiobjective fuzzy approach. The thermal power plant is typically regulated by the fuel flow rate, the spray flow rate, and the gas recirculation flow rate. However, Strictly maintaining the steam temperature can be difficult due to heating value variation to the fuel source, time delay changes in the main steam temperature. the change of the dynamic characteristics in the steam-turbine system. Up to the present time, PID Controller has been used to operate this system. However, it is very difficult to achieve an optimal PID gain with no experience, since the gain of the PID controller has to be manually tuned by trial and error. These parameters tuned by multiobjective based on immune network algorithms could be used for the tuning of nonlinear power plant.

• 한국전산유체공학회:학술대회논문집
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• 1998.05a
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• pp.75-81
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• 1998

A new advanced integral reactor of 330 MWt capacity named SMART(System-integrated Modular Advanced ReacTor) is currently under development at KAERI(Korea Atomic Energy Research Institute). One of the major design features of the integral reactor is locating the steam generators(SG) inside reactor vessel and eliminating the possibility of LB LOCA(large Break Loss of Coolant Accident). Orifices are fitted at the low part of steam generator cassette to stabilize and balance coolant flow distribution in the MCP (Main Circulation Pump) pressure header. A sensitivity analysis is conducted to determine the optimum orifice size using computer code 'CFX'.