A chemical pulp mill system and method of using black liquor flashing steam from a digester system comprises generating black liquor in the digester system, sending the black liquor to an evaporator system without using any pre-evaporator system, flashing the black liquor in the evaporator system to yield steam, and using at least some of the steam for chip steaming in a chip bin and/or for supplying in-direct heat exchangers in the digester system for preheating white liquor and/or filtrates for use in the digester system. In other embodiments, a chemical pulp mill system and method for utilizing black liquor flashing steam from a digester system comprises generating black liquor from the digester system, flashing the black liquor in one stage to yield steam prior to leading the black liquor into an evaporation system storage tank, using the steam to steam chips and/or evaporate black liquor in the evaporation system, and preventing formation of concentrated non-condensable gases and foul condensate in the digester system by using the digester system without any condenser for the black liquor flashing steam.