Instant release EOS7R

Hello everybody,

To simulate an instant release of a radionuclide in eos7r, we have to insert a no-zero value of the component in the INCON block. This value should be the mass fraction of the component that will be released. My doubt is how to calculate this mass fraction. If there is only the single phase liquid,  is the radionuclide mass fraction the ratio between the mass  of the radionuclide released and the total mass of the brine in the system?

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  • Dear Barbara,

    The aqueous phase mass fraction is a local, grid-block-specific concentration, defined as the mass of radionuclide dissolved in aqueous phase in the grid block divided by the total mass of aqueous phase in that same grid block.  The aqueous phase mass includes the mass of all dissolved components. 

    Somehow I think you may be asking a question different from how I interpreted it, so please feel free to follow up.


  • Hello Barbara,

    I do not know the reason why you want to specify a mass fraction in INCON block. Can you simulate the release by providing a release rate of the component in GENER block?


  • Hello Yingqi,

    If I well understood, the release rate in  GENER block constitues a flow-through conditions (kg/s), but using the INCON block it constitues an instant release expressed in mass fraction.  Apparently, as Curt says, this mass fraction corresponds to the total mass of Rn dissolved in aqueous phase divided by the total mass of the aqueous phase in the considered grid block.


  • Curt Oldenburg 

    Thank you very much Curt,

    That was the question!


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