Full metadata
Title
Nonlinear dynamic modeling and simulation of a passively cooled small modular reactor
Description
A nonlinear dynamic model for a passively cooled small modular reactor (SMR) is developed. The nuclear steam supply system (NSSS) model includes representations for reactor core, steam generator, pressurizer, hot leg riser and downcomer. The reactor core is modeled with the combination of: (1) neutronics, using point kinetics equations for reactor power and a single combined neutron group, and (2) thermal-hydraulics, describing the heat transfer from fuel to coolant by an overall heat transfer resistance and single-phase natural circulation. For the helical-coil once-through steam generator, a single tube depiction with time-varying boundaries and three regions, i.e., subcooled, boiling, and superheated, is adopted. The pressurizer model is developed based upon the conservation of fluid mass, volume, and energy. Hot leg riser and downcomer are treated as first-order lags. The NSSS model is incorporated with a turbine model which permits observing the power with given steam flow, pressure, and enthalpy as input. The overall nonlinear system is implemented in the Simulink dynamic environment. Simulations for typical perturbations, e.g., control rod withdrawal and increase in steam demand, are run. A detailed analysis of the results show that the steady-state values for full power are in good agreement with design data and the model is capable of predicting the dynamics of the SMR. Finally, steady-state control programs for reactor power and pressurizer pressure are also implemented and their effect on the important system variables are discussed.
Date Created
2016
Contributors
- Arda, Samet Egemen (Author)
- Holbert, Keith E. (Thesis advisor)
- Undrill, John (Committee member)
- Tylavsky, Daniel (Committee member)
- Karady, George G. (Committee member)
- Arizona State University (Publisher)
Topical Subject
Resource Type
Extent
xiii, 142 pages : illustrations (some color)
Language
eng
Copyright Statement
In Copyright
Primary Member of
Peer-reviewed
No
Open Access
No
Handle
https://hdl.handle.net/2286/R.I.40760
Statement of Responsibility
by Samet Egemen Arda
Description Source
Viewed on January 13, 2017
Level of coding
full
Note
thesis
Partial requirement for: Ph.D., Arizona State University, 2016
bibliography
Includes bibliographical references (pages 103-108)
Field of study: Electrical engineering
System Created
- 2016-12-01 07:03:28
System Modified
- 2021-08-30 01:20:34
- 3 years 2 months ago
Additional Formats