10.08.2013 Views

Code Manual for CONTAIN 2.0 - Federation of American Scientists

Code Manual for CONTAIN 2.0 - Federation of American Scientists

Code Manual for CONTAIN 2.0 - Federation of American Scientists

SHOW MORE
SHOW LESS

You also want an ePaper? Increase the reach of your titles

YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.

Table 6-1<br />

Overview <strong>of</strong> DCH Processes Modeled in <strong>CONTAIN</strong><br />

Without Using the RPV and Cavity Model<br />

Representation in Brief Model Description or Basis With the RPV and<br />

DCH Process <strong>CONTAIN</strong> <strong>for</strong> User Input Cavity Models<br />

Core melt ejection User input User-specified source tables Gluck correlation<br />

from RPV introduce debris into trapped field<br />

Gas blowdown from Internally calculated RPV modeled as a cell connected to A(t) calculated using<br />

WV cavity with user-specified hole size Pilch-Gluck<br />

A(t) correlation ~i192b]<br />

Cavity dispersal User input Integral <strong>of</strong> cavity entrainment rate Various correlations<br />

fraction<br />

Cavity entrainment User input Externally calculated to set the Various correlations<br />

rate mass per unit time <strong>of</strong> the source<br />

Particle size User input Each field is given a mean particle Weber breakup<br />

diameter model<br />

Particle transport Internally calculated Two-phase flow with a parametric<br />

slip treatment<br />

Trapping on Internally calculated Time <strong>of</strong> flight based on flow rate&<br />

structures Kutateladze criteria <strong>for</strong> fwst two<br />

impacts; gravitational fall time<br />

thereafter<br />

Chemical reactions Internally calculated Gas-side & drop-side transport<br />

limitations; Zr, Fe, Cr, Al metals;<br />

oxygen and steam oxidants; Fe/HzO<br />

equilibrium<br />

Hydrogen burning Internally calculated HECTR 1.8 correlations,<br />

continuous burning, and H2 bulk<br />

spontaneous recombination at high<br />

temperature and debris<br />

concentrations<br />

Convective heat Internally calculated Forced convection: N~Ucorrelation<br />

transfer <strong>for</strong> spheres<br />

Radiation heat Internally calculated Debris/gas and debnslwall gray<br />

transfer body law with user-specified<br />

emissivity<br />

initial values <strong>of</strong> these parameters are controlled by the user. The exchange <strong>of</strong> mass and energy from<br />

the debris to the atmosphere and its surroundings are modeled in <strong>CONTAIN</strong> <strong>for</strong> each debris field.<br />

The DCH models are evaluated multiple times, once <strong>for</strong> each field, using the composition,<br />

temperature, and other properties <strong>of</strong> that field. The composition and temperature <strong>of</strong> each field will<br />

Rev O 64 6/30/97

Hooray! Your file is uploaded and ready to be published.

Saved successfully!

Ooh no, something went wrong!