When it is added local loads for nozzles, these loads should be taken in consideration for the support calculation and fundation loads considering the location and orientation of nozzle, for example,
Nozzle A located on top head has local loads such as P =10daN; VL=10daN
Nozzle B located on the shell at 0º with loads P =5 daN; VL=5 daN

Nozzle C located on shell at 90º with loads P =15 daN; VL=15 daN

For supports it should be considered a weight of P(A) + VL (B) + VL (C) = 10+5+15 = 30 daN extra weight (it can be applied a factor of 0.2 or 0.4 depending on the number of nozzles)

For the shear load at the base of the supports it should be VL (A) + max(P(B);P(C)) = 10 + 15 = 25 daN of shear
For the moments the same.