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Code Manual for CONTAIN 2.0 - Federation of American Scientists

Code Manual for CONTAIN 2.0 - Federation of American Scientists

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NENGV<br />

= nengv<br />

NWDUDM<br />

= nwdudm<br />

NMTRAC<br />

= nmtrac<br />

MAXSFF<br />

= maxsff<br />

MxNFPc<br />

= mxnfpc<br />

The following keywords<br />

in the global control input block pefiain to making a DCH calculation.<br />

NDHSPC<br />

= ndhspc<br />

NDHBIN<br />

= ndhbin<br />

the number <strong>of</strong> engineered vents in the problem specified in the ENGVENT<br />

block asdescribed in Section 14.2.4.2. Default=O.<br />

the number <strong>of</strong> array locations reserved <strong>for</strong> the user-defined material<br />

(USERDAT) tables. The space requested must be large enough to hold the<br />

pairs <strong>of</strong> temperature and property values defined in the USERDAT block <strong>for</strong><br />

all user-defined materials. If a direct containment heating (DCH) run is being<br />

per<strong>for</strong>med, this input should be specified to increase the amount <strong>of</strong> reserved<br />

space from the default value to accommodate the DCH material property<br />

tables. A value <strong>of</strong> 5000 is suitable <strong>for</strong> most DCH calculations. Default =<br />

1000.<br />

the maximum number <strong>of</strong> thermodynamic materials whose mass is tracked in<br />

the mass and energy accounting scheme, in addition to the coolant. Note that<br />

the combined liquid and vapor mass <strong>of</strong> the coolant is always tracked in the<br />

accounting scheme. Also, all thermodynamic materials are always tracked<br />

with respect to their energy, although only the masses <strong>of</strong> the coolant and any<br />

materials designated by the user in the TRACKMAT input are explicitly<br />

tracked in the mass accounting. Jn the coding <strong>for</strong> the mass accounting, it was<br />

assumed that the user will be interested in tracking only a handfid <strong>of</strong> the<br />

many possible <strong>CONTAIN</strong> thermodynamic materials at any one time.<br />

Consequently, the mass tracking arrays <strong>for</strong> each repository have the same<br />

structure, and since many repositories can be present in a problem, the storage<br />

and output requirements <strong>for</strong> the mass arrays could be quite large, if not<br />

restricted to a number considerably smaller than the total number <strong>of</strong><br />

thermodynamic materials, including default materials, in a typical problem.<br />

Thus, it is suggested that “nmtrac” be kept as small as possible (< 6). It can<br />

be zero if no masses but that <strong>of</strong> the coolant are to be tracked. Default = O.<br />

the maximum number <strong>of</strong> structures to which the fti tracking model outflow<br />

from a single structure is distributed. Default= 5.<br />

the maximum number <strong>of</strong> flow path connections <strong>of</strong> any type to a given cell.<br />

Default = 10.<br />

the maximum number <strong>of</strong> species that can be present in each debris field in a<br />

DCH calculation. This corresponds to the NH parameter used in Section 6,<br />

and sets the number <strong>of</strong> DCH species that must be given in the USERDEF and<br />

USERDAT input blocks. This is required input <strong>for</strong> a DCH calculation.<br />

Default = O.<br />

the number <strong>of</strong> debris fields per generation. By default only one debris field<br />

will be modeled. Default= 1.<br />

Rev O 14 12 6/30/97

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