Dear @riya,
the general idea is sound, but I have few remarks.
- Since you are using the fluscw.f routine, for correct results the scoring cards which you want to use for the scoring of air kerma should score ALL-PART, not DOSE-EQ (otherwise you apply other weightings on top).
- The fluscw.f routine can easily check the SDUM of the scoring card, less easily the region where the scoring is applied (see below)
- I suggest to make first a filtering by the type of estimator (ISCRNG variable, 2 for USRBIN, 3 for USRTRACK) and then by the scoring SDUM.
You can find attached an updated template of your routine. As a side note, remember that with USRBIN region type scoring you should still divide the estimated results by the region volume to obtain pGy/primary.
Please take your time to have a look at it and let me know in case you have further questions.
Best,
Davide
PS: mind that the first coefficient is 7.43 pGy cm2 
fluscw.f (6.0 KB)