The influence of CHF prediction on modeling of once-through steam generators using RELAP5/MOD1

Conference · Fri Jan 01 04:00:00 EST 1982 · Am. Soc. Mech. Eng., (Pap.); (United States)

OSTI ID:5482143

Hassan, Y A; Morgan, C D

Comparisons of the predictions of RELAP5/MOD1 to data obtained from a 19-tube model of a once-through steam generator (OTSG) were performed. The initial results were not satisfactory since the predicted outlet steam temperature was much too low. This discrepancy was traced to the inappropriate use of the modified Zuber critical heat flux (CHF) correlation for the conditions occurring during integral economizer OTSG operation. A study of available low-flow CHF correlations was performed which showed that either the Macbeth or Biasi correlations used in conjunction with RELAP5/MOD1 would produce good agreement with the data for the integral economizer type OTSG. The Macbeth correlation was the best for the OTSG with a recirculation path; however, it was not entirely satisfactory due to a slight delay in its prediction of CHF.

• Research Organization: Babcock and Wilcox Co., Lynchburg, VA
• OSTI ID: 5482143
• Report Number(s): CONF-820705-
• Conference Information: Journal Name: Am. Soc. Mech. Eng., (Pap.); (United States) Journal Volume: 82-NE-13
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
420400* -- Engineering-- Heat Transfer & Fluid Flow
BOILERS
COMPUTER CODES
COMPUTERIZED SIMULATION
CONTROL
CORRELATIONS
CRITICAL HEAT FLUX
ECONOMIZERS
FORECASTING
HEAT FLUX
R CODES
SIMULATION
STEAM
STEAM GENERATORS
TEMPERATURE CONTROL
VAPOR GENERATORS