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Code Manual for CONTAIN 2.0 - Federation of American Scientists

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Example:<br />

PRFLOW OFF<br />

PRLOW-CL ON<br />

In the above example, flow output is suppressed, and lower cell output is activated.<br />

14.5.1.3 Restart hmut <strong>for</strong> DCH Calculation. There is a potential pitfall in defining input <strong>for</strong> restarts<br />

<strong>of</strong> DCH problems that users must keep in mind. There are a number <strong>of</strong> DCH input parameters that<br />

can be specified <strong>for</strong> all cells in the global DHEAT input block and subsequently reset <strong>for</strong> specific<br />

cell(s) in the DCH-CELL block(s). If one <strong>of</strong> these variables appears in the global DHEAT block <strong>for</strong><br />

a restart, this value will by default be applied to all cells, even if cell-specific values were previously<br />

set in the parent run. Hence, if cell-specific values are desired in the restart, they must be specified<br />

in the DCH-CELL blocks <strong>for</strong> the cells <strong>of</strong> interest in the restart also. It is necessary to do this only<br />

if the variable appears in the restart global DHEAT block; otherwise all values remain at the values<br />

set in the parent run unless changed in the restart.<br />

14.5.2 Cell Level Input <strong>for</strong> a Restart<br />

Certain model parameters within a cell as described below maybe changed in a restart run. If no<br />

changes are desired in a given cell, that cell can be omitted from the restart input.<br />

14.5.2.1 Uppe r Cell Restart Block. The upper cell models and parameters that maybe modified on<br />

restart are shown in the restart input template between the keywords CELL and LOW-CELL. Only<br />

those portions <strong>of</strong> the upper cell restart input that differ from the initial input are described. Note that<br />

the H-BURN and SOURCE input, which is followed by ON or OFF in versions prior to CONTMN<br />

1.2, no longer uses ON or OFF but the same <strong>for</strong>mat as that in an initial run.<br />

ATMOS a keyword sequence to initiate the respecification <strong>of</strong> all atmospheric sources<br />

SOURCE in the cell. Note that the first number required after SOURCE is “nso,” the<br />

= nso number <strong>of</strong> tables to follow. The “((data) ... EOI)” sequence in the input<br />

template is explained in detail in Sections 14.3.1.2, Upper Cell Atmosphere<br />

Initial Conditions and Sources, and 14.4.1, Source Table Input. The number<br />

<strong>of</strong> tables and number <strong>of</strong> data points in the tables must not be greater than<br />

those initially specified. If the number <strong>of</strong> tables is less than the original, only<br />

the first “nso” tables will be replaced, and the rest will remain unchanged.<br />

FISSION a keyword sequence to initiate the respecification <strong>of</strong> all fission product<br />

SOURCE sources in the cell. Note that the first number required after SOURCE is<br />

= nso “nso,” the number <strong>of</strong> tables to follow. The “((data) ... EOI)” sequence in the<br />

input template is explained in detail in Sections 14.3.1.9, Fission Product<br />

Sources and 14.4.1, Source Table Input. The number <strong>of</strong> tables and the<br />

number <strong>of</strong> data points in the tables must not be greater than those initially<br />

specified. If the number <strong>of</strong> tables is less than the original, only the fmt “nso”<br />

tables will be replaced, and the rest will remain unchanged.<br />

O 14 171 6/30/97

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