10.08.2013 Views

Code Manual for CONTAIN 2.0 - Federation of American Scientists

Code Manual for CONTAIN 2.0 - Federation of American Scientists

Code Manual for CONTAIN 2.0 - Federation of American Scientists

SHOW MORE
SHOW LESS

Create successful ePaper yourself

Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.

in the USERDEF list and the DCH debris material properties input according to the USERDAT<br />

input <strong>for</strong>mat (see Section 14.2. 1.1). The one very important difference between DCH user-defined<br />

materials and other user-defined materials is that the phase type, DEBRIS, is specified after the<br />

material name in the USERDAT input block. (See Sections 6.6 and 14.2.1.2 <strong>for</strong> more in<strong>for</strong>mation.)<br />

To use the CORCON model, it is no longer necessary to specify the dummy melt material names<br />

used to represent CORCON materials in the <strong>CONTAIN</strong> lower cell intermediate layer representing<br />

CORCON. These are now included by default. These names are LCCHOX, LCCMET, and<br />

LCCLOX, as described in Section 5.3.<br />

The names <strong>of</strong> user-defined fission products must also be specified in the MATERIAL block,<br />

following the keyword FP-NAMES. FP-NAMES, if used, must follow the COMPOUND block.<br />

Arbitrarily chosen names can be used <strong>for</strong> fission products, unlike the material names in the<br />

COMPOUND block, which must be chosen from Table 3-1. Nuclide names such as 1133,or general<br />

names such as DUMI, can be used.<br />

Names <strong>of</strong> aerosol components maybe either that <strong>of</strong> a nongaseous material specified immediately<br />

after COMPOUND or a dedicated aerosol name. The latter may be specified after the keyword<br />

AERNAMES following the COMPOUND block. Such names must be unique.<br />

3.2 Water Thermodynamic Properties<br />

Water is the only material that is considered to undergo phase changes, and only the liquid-gas<br />

transition is modeled. Water phase changes are modeled in the condensation <strong>of</strong> steam onto<br />

structures and aerosols, pool boiling, and the evaporation <strong>of</strong> water films. The heat <strong>of</strong> evaporation<br />

is automatically taken into account in the enthalpy function <strong>of</strong> each phase <strong>of</strong> water. Both an ideal<br />

and a non-ideal equation <strong>of</strong> state are available as discussed in Sections 3.2.1 and 3.2.2, respectively.<br />

3.2.1 Ideal Water Equation <strong>of</strong> State<br />

The ideal water equation <strong>of</strong> state is based on an ideal gas <strong>for</strong>mulation <strong>of</strong> the vapor [Van78] and on<br />

the saturation properties <strong>of</strong> the liquid. ~ou79] The specific heat <strong>of</strong> the solid is based on Reference<br />

Raz76. The specific enthalpy <strong>for</strong> the vapor is assumed given by its zero-pressure limit<br />

h, = h, (T, P, + O) as shown in Equation (3-2). In <strong>CONTAIN</strong>, the liquid is taken to be<br />

incompressible, with properties as a function <strong>of</strong> temperature defined along the saturation curve. The<br />

enthalpy ~ <strong>of</strong> the liquid in the ideal equation <strong>of</strong> state is taken to be<br />

R O<br />

hf(T,P) = u~(T,F’) + p/Pi(T)<br />

37<br />

(3-3)<br />

6/30/97

Hooray! Your file is uploaded and ready to be published.

Saved successfully!

Ooh no, something went wrong!