|Ratiko Ratiko||Radioactive Waste Technology Center, National Nuclear Energy Agency of Indonesia (BATAN), Serpong, Indonesia
|Shandy Arysenna Samudera||Department of Mechanical Engineering, Universitas Indonesia, 16424 Depok, Indonesia|
|Richiditya Hindami||Department of Mechanical Engineering, Universitas Indonesia, 16424 Depok, Indonesia|
|Amudi Tua Siahaan||Department of Mechanical Engineering, Universitas Indonesia, 16424 Depok, Indonesia|
|Leo Naldi||Department of Mechanical Engineering, Universitas Indonesia, 16424 Depok, Indonesia|
|Dian Hapsari Safitri||Department of Mechanical Engineering, Universitas Indonesia, 16424 Depok, Indonesia|
|T. M. I. Mahlia||Department of Mechanical Engineering, Universiti Tenaga Nasional, 43009 Kajang, Selangor, Malaysia|
|Nasruddin Nasruddin||Department of Mechanical Engineering, Universitas Indonesia, 16424 Depok, Indonesia|
This study proposes a method of optimizing the dry storage design for nuclear-spent fuel from the G.A. Siwabessy research reactor at National Nuclear Energy Agency of Indonesia (BATAN). After several years in a spent fuel pool storage (wet storage), nuclear spent fuel is often moved to dry storage. Some advantages of dry storage compared with wet storage are that there is no generation of liquid waste, no need for a complex and expensive purification system, less corrosion concerns and that dry storage is easier to transport if in the future the storage needs to be sent to the another repository or to the final disposal. In both wet and dry storage, the decay heat of spent fuel must be cooled to a safe temperature to prevent cracking of the spent fuel cladding from where hazardous radioactive nuclides could be released and harm humans and the environment. Three optimization scenarios including the thermal safety single-objective, the economic single-objective and the multi-objective optimizations are obtained. The optimum values of temperature and cost for three optimization scenarios are 317.8K (44.7°C) and 11638.1 US$ for the optimized single-objective thermal safety method, 337.1K (64.0°C) and 6345.2 US$ for the optimized single-objective cost method and 325.1K (52.0°C) and 8037.4 US$ for the optimized multi-objective method, respectively.
Decay heat; Dry storage; Multi-objective optimization; Spent fuel
Based on the optimization results, the spent fuel from BATAN can be transferred from wet storage to the dry storage designed in this study after 4 years of storage. In addition, this report shows that the passive cooling system in the dry storage that uses a stack effect can decrease the temperature to safe parameters.
The optimum values of temperature and cost at the single-objective thermal safety optimization are 317.8K (44.7°C) and 11638.1 US$, whereas the optimum values at the single-objective cost optimization are 337.1K (64.0°C) and 6345.2 US$. Using multi-objective optimization, the optimum values of temperature and cost are 325.1K (52.0°C) and 8037.4 US$, respectively.
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