Study and Application of Methods for Determining Spare Parts Reserve Quotas for Nuclear Power Plant
This paper investigates a critical issue in nuclear power plant spare parts management,which is how to reduce inventory costs while ensuring an adequate supply of spare parts to meet the demands arising from dai-ly operational defects and unforeseen defect handling during preventive maintenance.To address this problem,this paper proposes a method for determining spare parts reserve quotas based on renewal function.This method fits the lifetime data of spare parts,uses lifetime distribution function and renewal function to calculate the mean and variance of the number of failures(demand for issuance)of spare parts within a given time interval,and determines the safety stock level of spare parts based on the management requirements of different grades of spare parts in nuclear power plants.A notable feature of this method is that it does not assume a constant fail-ure rate for spare parts,making it suitable for spare parts with various lifetime distribution types and offering broader applicability.It is particularly well-suited for determining reserve quotas for low-flow-rate spare parts compared to time-series-based methods.However,it is worth noting that this method requires a significant ac-cumulation of spare parts'lifetime data as input,highlighting the importance of strengthening the accumulation of spare parts reliability data in nuclear power plant spare parts management.The research findings presented in this paper are expected to provide a more effective approach and strategy for spare parts management in nuclear power plants to balance cost and reliability requirements.
nuclear power plantspare parts managementreserve quotasrenewal function
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