Boiling water reactor:

A BWR (boiling water reactor) facility is susceptible to corrosion, concluding from dissolved oxygen, in the similar reactions as are present in a pressurized water reactor (PWR).  Therefore, since of the design of these facilities the use of chemical additives is prohibited since continuous concentration would occur within the reactor vessel because of boiling.  Boiling would result in plating out procedure, and the irradiation of these concentrated additives or impurities would create an extreme environment of radiation levels as well as adverse corrosion situations.

Through the extremely nature of operation of a BWR facility, the buildup of high concentrations of dissolved oxygen is avoid. Since boiling is occurring within the reactor vessel and the steam produced is used in several processes and then condensed and removal of dissolved gases is a continual process.  As begin, boiling is an effectual means of erasing gases from a solution. If we were to compare the oxygen content of the steam and the water within a BWR, we would search classical concentrations of 100 ppb to 300 ppb in the water and 10,000 ppb to 30,000 ppb within the steam.  This concentration procedure is continuous during operation, and the dissolved oxygen remains within the gaseous state and is subsequently erased in the condensing units with other noncondensible gases.  Since with PWR facilities, BWR facilities minimize an introduction of dissolved oxygen through pretreating makeup water through some method.  The huge oxygen concentrations measured in the steam system output primarily from the radiolysis of water according to Reaction (3-12), and as operation is continued, an equilibrium concentration of 100 ppb to 300 ppb is established.  That concentration of oxygen is consistent along with the purpose of minimizing corrosion.