Code Manual for CONTAIN 2.0 - Federation of American Scientists

encountered. Aerosol suspended masses are checked for negative masses and reset but a diagnostic
is not given. Fission product masses are not checked by the code to detect a possible negative mass
condition.
The following example indicates how the injection of steam into a cell atmosphere could be
modeled. That steam may be generated, for example, from a blowdown of the primary system. Only
one source is needed, and thus “nso” = 1. The source material is injected into the cell as steam, so
the “oname” is H20V. Linear interpolation is desired, so “ival” = 2. There are fourteen times, mass
flow rates, and enthalpies defined in the tables, and “n” = 14. Initially, the flow rate is small but
rapidly builds and then slowly decreases as the pressure driving the steam flow drops, and the steam
remaining in the tank decreases. At 23.2 s, the blowdown is complete, with the mass flow rate
dropping to O.
SOURCE=l
H20V=14
IFLAG=2
T= 0.0 0.2 0.7 1.2 2.2 3.2
4.2 8.2 10.2 15.2 20.2 22.7 23.2 100.0
MASS= 0.691E4 2.971E4 2.717E4 2.457E4 1.964E4 1.693E4
1.5 16E4 0.965E4 0.827E4 0.381E4 0.216E4 0.011E4 0.00.0
ENTH= 1.131E6 1.126E6 1.127E6 1.131E6 1.117E6 1.113E6
1.108E6 1.142E6 1.138E6 1.102E6 0.629E6 0.454E6 O 00.0
EOI
14.4.2 Global and Cell Level Table Input
This section gives the generic definitions of the standard keywords and values used in global and cell
level tables. Such tables provide a standmd format to specify the relationship between one
dependent and one independent variable, such as a heat transfer coefficient versus time, and should
not be confused with the source tables discussed in the preceding section.
The distinction between global and cell level tables is made on the basis of the level of the model
using the table format. The tables used in global models, such as the flow model, are considered
global, whereas tables used in cell level models, such as the lower cell model, are considered at the
cell level. Global tables require that the user specify “numtbg” and “maxtbg” in the global
CONTROL block whereas cell level tables require specification of “numtbc” and “maxtbc” in the
appropriate cell level CONTROL block.
The reader should note that although the keywords used in all global and cell level tables are the
same, the definition and utilization of the values associated with the keywords depends on the
application. Also a particular application may impose special requirements on the values that may
be selected. Thus the present section cannot replace the discussion of such values in conjunction
with the particular models that use them. Ij a definition of a table keyword or value appears in
conjunction with the discussion of a particular model, that definition supersedes the generic
definition given below.
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