Simulation of SBWR startup transient and stability Page: 5 of 20
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Table 1. Summary of SBWR Startup Transient Phases
Phase I T, Phase II T2 III T3 IV
GE 1 2 3 4 4 5 6 7 8
Steps Deaeration Rod Heating Pressurization t Auto FW 10% Power Power rise to 100%
Withdrawal u Control M
Start e i Npeh Turbine -------
-- of ne
CRD Flow <------ RWCU/SDC ----> Level in
N Control h
< ----- No Feed Water ------------------ -----> i Auto FW
< --- - Level at Separator ---->
1 _ _
e Steam through
< ----------------- t bypass valve --- --->
< -------- Pressure
No Condensation Large Low Density
Oscillations < -- induced --> Ah; Void Wave
oscillations Low Oscillation
Flow %< 12%
T1 = Onset of NVG
T2 = Saturation in Chimney Inlet
T3 = Min Npch reached or Possibility of Density Wave
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Cheng, H.S.; Khan, H.J. & Rohatgi, U.S. Simulation of SBWR startup transient and stability, article, June 1, 1998; Upton, New York. (https://digital.library.unt.edu/ark:/67531/metadc702243/m1/5/: accessed March 26, 2019), University of North Texas Libraries, Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.