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Code Manual for CONTAIN 2.0 - Federation of American Scientists

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Table C-3 Validation Matrix <strong>for</strong> Atmosphere Thermal Hydraulics and Irttercell Flow Modeling (Continued)<br />

Integral Test Accident Type Reference Nodes <strong>Code</strong> Model Rankinga Comment<br />

Experiment Facility or Process Version<br />

Simulated Pressure Gas<br />

Mixing<br />

!zl.~, 22’2], WEc Rapid Ti196 2,4, 1.12 M-H M-H Transient gas mixing was dominated<br />

!20.1 (blind) LST transient to and 17 compression effects. Nodalization<br />

facility simulate DBA schemes such as the 17-cell scheme w<br />

conditions<br />

added cells below the injection point<br />

restricted mixing somewhat so that th<br />

lower vessel heat transfer was reduced<br />

and the pressure peak was overpredict<br />

The 2-cell scheme with a single<br />

containment cell (excluding the inject<br />

compartment) overmixed the containment<br />

and resulted in an underpredictio<br />

<strong>of</strong> pressure. A 4-cell scheme appeare<br />

approximate well the compression eff<br />

using dead ended cells; the pressure p<br />

was thus predicted better than with ot<br />

schemes.<br />

17 1.2 M M-H Mixing was underpredicted and press<br />

overpredicted--similar to results from<br />

1.12 version with old flow solver.<br />

rest No. 1,2,3, WEc Long-term Ti191 1 1.11 H NIA The external passive containment coo<br />

md 4 SST passive system (PCS) was modeled with<br />

facility containment additional cells. The pressure was<br />

cooling<br />

controlled by condensation within the<br />

vessel and evaporation from the vesse<br />

exterior. Multiple steam injection<br />

elevations created a well-mixed<br />

containment,<br />

Rev. O C-19 6/

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