Analisis Kinerja Neutronik Terhadap Penggunaan Burnable Poisons Gd2O3 Pada Reaktor NuScale Power Module Berbahan Bakar (Th,U-235)O2 Melalui Simulasi MCNP - Submit Jurnal/Seminar

Putri, Syifa SalsabilaAldrian (2025) Analisis Kinerja Neutronik Terhadap Penggunaan Burnable Poisons Gd2O3 Pada Reaktor NuScale Power Module Berbahan Bakar (Th,U-235)O2 Melalui Simulasi MCNP - Submit Jurnal/Seminar. Bachelor thesis, Institut Teknologi Kalimantan.

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Abstract

Pada awal pengoperasian, reaktor nuklir mengalami reaktivitas berlebih akibat produksi neutron yang tinggi. Hal ini dapat dikendalikan melalui penggunaan bahan bakar dengan tingkat pengayaan optimal dan penambahan material penyerap neutron seperti burnable poisons. Penelitian ini bertujuan untuk mengevaluasi kinerja neutronik reaktor NuScale Power Module (NPM) dengan bahan bakar (U-235,Th)O₂, serta variasi penambahan burnable poisons Gd₂O₃. Simulasi dilakukan menggunakan perangkat lunak MCNPX dengan variasi pengayaan U-235 sebesar 4%, 5%, dan 6%, serta jumlah batang burnable poisons sebanyak 0, 16, dan 34 batang. Penelitian diawali dari pemodelan asembli, lalu dilanjutkan hingga pemodelan teras reaktor. Adapun parameter utama yang dianalisis yaitu, faktor multiplikasi efektif (k_eff), distribusi fluks neutron, rasio konversi, dan faktor puncak daya (PPF). Berdasarkan hasil simulasi, peningkatan pengayaan bahan bakar menghasilkan kenaikan nilai k_eff sebesar 0,344% saat menambah pengayaan dari 4% ke 5% dan sebesar 0,216% dari pengayaan 5% ke 6%. Namun, hal tersebut menyebabkan lonjakan daya di teras yang ditunjukkan dari kenaikan PPF sebesar 2,666%. Peningkatan pengayaan U-235 membuat semakin lama waktu yang dibutuhkan untuk membakar habis Gd₂O₃, yakni masing-masing pada hari ke-360, 420, dan 480 untuk pengayaan 4%, 5%, dan 6%. Penambahan batang Gd₂O₃ menurunkan reaktivitas berlebih tanpa mengganggu kestabilan reaktor dan reaktor tetap beroperasi selama waktu operasi (24 bulan) dengan k_eff di akhir waktu operasi bernilai 1,038. Penambahan batang Gd2O3 juga memperkecil persebaran neutron di teras sebesar 13,041% saat menggunakan 16 BPR dan 31,701% saat menggunakan 34 BPR, serta membuat nilai rasio konversi berkurang sebesar 2,353%.

Item Type: Thesis (Bachelor)
Subjects: Q Science > QC Physics
Divisions: Jurusan Sains, Teknologi Pangan, dan Kemaritiman > Fisika
Depositing User: Syifa Salsabila Aldrian Putri
Date Deposited: 11 Jul 2025 06:00
Last Modified: 11 Jul 2025 06:00
URI: http://repository.itk.ac.id/id/eprint/23861

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