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Code Manual for CONTAIN 2.0 - Federation of American Scientists

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FINVT<br />

= (finvt)<br />

(8-5). If FGPPWR is not specified, only al should be specified. Default = O.<br />

(W/kg <strong>for</strong> odd coefficients and S-l<strong>for</strong> even coefficients)<br />

input specifying inventory factors “finvt” <strong>for</strong> each <strong>of</strong> the “nfpchn” chain<br />

elements <strong>of</strong> the current user-defined linear chain. This input is required if a<br />

user-specified branching decay process is being modeled (outside <strong>of</strong> the<br />

library), and the user wishes to rely on invento~ factors to distribute initial<br />

fission product masses appropriately over the linear chains. When merging<br />

decay paths are not present, the inventory factor <strong>for</strong> a chain element<br />

represents the probability that the fission product corresponding to the chain<br />

element will decay to all <strong>of</strong> its daughters and granddaughters in the sequence<br />

given by the linear chain. (See Section 8.3.) The sum <strong>of</strong> the inventory<br />

factors <strong>for</strong> each fission product must be equal to 1. Default= 1 <strong>for</strong> the fwst<br />

occurrence <strong>of</strong> a fission product in the set <strong>of</strong> linear chains, and O <strong>for</strong><br />

subsequent occurrences.<br />

EOI the keyword required <strong>for</strong> terminating the FISSION input block.<br />

An alternative <strong>for</strong>mat is also available <strong>for</strong> the FISSION input block as described in Appendix B.<br />

This alternative input <strong>for</strong>mat includes the specification <strong>of</strong> initial fission product masses and<br />

release/acceptance functions at the global level with the FPM-CELL keyword. The FPM-CELL<br />

input block can also be given at the global level when using the input <strong>for</strong>mat described above;<br />

however, this is not the recommended procedure. The recommended procedure is to define the<br />

FPM-CELL input block at the cell level as described in Section 14.3.1.10.<br />

14.2.6.2 Fission Product Transpo rt Efficiency in Liauid Pathwav~. The FPLIQUID block is used<br />

to define the efficiency factors <strong>for</strong> fission product transport in liquid pathways. These factors<br />

determine the rate <strong>of</strong> fission product transport with structure condensate run<strong>of</strong>f and pool-to-pool<br />

transfers <strong>of</strong> coolant via engineered systems components, as discussed in Section 8.8.2.<br />

***** ***** ***** ***** ***** ************************************************<br />

FPLIQUID<br />

(fpname=fpliq)<br />

EOI<br />

***** ***** ***** ***** ***** ************************************************<br />

FPLIQUID the keyword <strong>for</strong> initiating the specification <strong>of</strong> transport efficiency factors <strong>for</strong><br />

fission products in liquid pathways. This keyword should be followed by<br />

pairs <strong>of</strong> the following two variables.<br />

fpname a fission product name that is among the list <strong>of</strong> fk.sion product names given<br />

in the global FISSION input block.<br />

Rev O 14 42 6/30/97

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