Code Manual for CONTAIN 2.0 - Federation of American Scientists

Table C-6 Validation Matrix for DCH Modeling (Concluded)
Experiment Experiment Reference Code Comments
(Test Description Version
Facility)
LIT and WC As described Wi192 N/A CONTAIN calculates metal oxidation rates using the gas-phase heat/mass transfer analogy,
Experiments above and the standard input prescription assumes debris is well mixed and that drop-side limits to
(Surtsey) mass transport are negligible. These concepts were tested against the results of the LFP and
WC experiments using an analytical calculation based upon the same heat/mass transfer
analogy as that used elsewhere in CONTAIN. In the LFP and WC experiments, hydrogen
production appeared to be largely limited to debris-steam interactions occurring in the
cavity. The experimental values of hydrogen production and the heatimass transfer analogy
were used to estimate the amount of debris-gas energy transfer occurring in the cavity. A
simple model incorporating this treatment successfully correlated the experimental values of
AP toa highdegree(R2> 0.98).The modelrequiredassuming well-mixed debris and
assuming that drop-side mass transport limits were unimportant, and the model’s success
was therefore interpreted as providing support for use of these assumptions in the
CONTAIN DCH standard input prescription.
SIWAET and As described Wi195a 1.12Z The CONTAIN models for non-airborne debris and debris-water interactions include some
ANLAET above parametric features, and calculated results for the IET experiments (especially the Zion IET
(Surtsey, experiments) exhibited some sensitivity to these features. However, the ratio of energy
COREXIT, transfer to hydrogen produced in the calculation is governed by the heat/mass transfer
and CTI’F) analogy and is considerably less sensitive to the parametric features of the model. In
sensitivity studies, it was found that the code either predicted both AP and Hzproduction
reasonablywell for the Zion lET experimentsor else failedto predict eitherAP or Hzwell,
whichwas interpretedas providingadditionalsupport for use of the CONTAINheat/mass
transferanalogyin calculatinghydrogenproduction.
‘Reference Wi195provides a relatively high-level summary of some of the results that are reported in much greater detail in unpublished work.
me DCH standard input prescription substantially overpredicted debris transport to the dome (f~Om)for the LFP experiments, reproduced the average behavior
well for the Zion-geometry IET experiments, and underpredicted fd.m 15~0% for the Surry geometry experiments.
and was insensitive tofdOmforboththeZionand SurryIET experiments.
AP was sensitiveto fdO~in the LFP experiments
(FootnotesContinuedOverleaf)
Rev. O c-34 6/30/97