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Licensed Unlicensed Requires Authentication Published by De Gruyter January 6, 2023

Weibull model for RUL estimation at RSG-GAS reactor implemented on PA01-AP01 secondary pump

  • Sri Sudadiyo EMAIL logo
From the journal Kerntechnik


Remaining Useful Life (RUL) estimation has been extensively explored in recent years. RUL could be used in deciding the maintenance timeline or inspection interval for the Reaktor Serba Guna – G. A. Siwabessy (RSG-GAS reactor). RSG-GAS reactor is a pool-type research reactor (built by the Interatom Internationale of Germany) and has been operating for more than 30 years to date. This study aimed to propose a Weibull model to find the RUL estimation value of the distribution parameters of the mean time to failure (MTTF). Therefore, the RSG-GAS reactor would be higher safety, longer lifetime and higher reliability with a smaller failure rate including for the PA01-AP01 secondary pump. The research methodology is processing data collection and estimating the parameters of the Weibull model to determine maintenance timeline or inspection intervals based on the MTTF value in case the reliability has reached the targeted percentage. Results show that the RUL estimation has been obtained for the RSG-GAS reactor. In the implemented study, a maintenance timeline has been stipulated for the PA01-AP01 secondary pump (with the model of KSB and type of CPK-S350-400) for the reliability of 90% and RUL estimation of circa 29 days.

Corresponding author: Sri Sudadiyo, Research Center for Nuclear Reactor Technology, Research Organization for Nuclear Energy, National Research and Innovation Agency, Kawasan Puspiptek Gd. 80, 15310, Tangerang Selatan, Indonesia, E-mail:


The author wishes to express the appreciation to the group of RSG-GAS ageing management program for their efforts in raw data provisioning for further calculations processed in this article. The author would also like to acknowledge the support provided by the management of the Research Center for Nuclear Reactor Technology.

  1. Author contributions: The author has accepted responsibility for the entire content of this submitted manuscript and approved submission.

  2. Research funding: This study did not receive a specific grant from any funding agency in the public, commercial, or not-for-profit sector.

  3. Conflict of interest statement: The author declares no conflicts of interest regarding this article.


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Received: 2022-09-06
Published Online: 2023-01-06
Published in Print: 2023-04-25

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