Code Manual for CONTAIN 2.0 - Federation of American Scientists

Table 4-2
Conservation of Momentum Equation for Flow Between Cell i and Cell j (Continued)
Sote that for quasi-steady flow paths without inertia, including the dedicated suppression pool
vent in submerged state, the definition of Wij is discussed in Section 4.4.2. In the above
Wij = total mass flow rate of gases, coolant vapor, and homogeneously
dispersed liquid coolant through a gas flow path or of pool coolant
through a pool flow path. Note that flow paths in the following
discussion, including the suppression pool vent, will be indexed by ij,
even though more than one path may be present between cells i and j;
Wi~~rjj = total mass flow rate in the inertial flow model;
Wc,,ij = critical flow rate for a gas path, defined in Equation (4-5);
~ij = inventory factors defined in Table 4-1 that reflect the pool-gas
hierarchy, as discussed in Section 4.2;
t = time;
CK = user-specified irreversible flow loss coefficient for the flow path;
% = the flow path density, which depends on the flow option used. For the
implicit flow option, pu = pi if i is the upstieam cell, and pu = pj if j is the
upstream cell. For the explicit (Runge-Kutta) flow option, pu = (pi +
pj)/2;
Pi = gas, vapor, and homogeneously dispersed liquid density in cell i for a
gas path; pool density in cell i for a pool path;
Pj = gas, vapor, and homogeneously dispersed liquid density in cell j for a
gas path; pool density in cell j for a pool path;
Ai&,j = user-specified area to length ratio of the flow path;
Aij = flow path area;
A~j = ~j for a pool flow path or gas flow path when the downstream end is
not submerged below the pool in the downstream cell, and A~j =
min(lAPijl/lOOO, 1) Aij when the downstream end is submerged;
Rev. O 4-15 6/30/97