In pressurized water reactor,boric acid(mainly 10B)is used as chemical poison for chemical compensation control of reactivity.Theoretical analysis and practical measurement show that the abundance of 10B decreases with the increase of burnup.Generally,after several cycles,the abundance of 10B needs to be adjusted to restore the initial design value.In this paper,the method of 10B abundance regulation is modeled theoretically,and a feasible scheme of primary 10B abundance regulation is given,which is verified in practice.The results show that the scheme is feasible and accurate.
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