OPTIMALISASI PENDINGINAN BAHAN BAKAR NUKLIR BEKAS REAKTOR SERBA GUNA SIWABESSY DI KOLAM PENYIMPANAN SEMENTARA

Sari

OPTIMIZATION OF SIWABESSY PURPOSE REACTOR SPENT NUCLEAR FUEL COOLING
IN INTERIM STORAGE POOL. A study on optimization of spent fuel cooling systems in the wet type
interim storage pool has been done. This study was conducted based on the technique specifications
data and the data which obtained from field, including burn-up of 72 and 56%, fuel loading of 42 and 24
element per-year. This research is intend to obtain the value of the total heat load, the increase pool
water temperature and the cooling system operating time on each condition. The calculation result is
obtained concluded as follow: burn-up of fuel affects the amount of cooling load received by water
storage ponds, on the condition of the cooling system is functioning and the VAC does not work, pool
water temperature increase is smaller because some heat is picked up by the room air through
convection and radiation.
While on the condition of cooling system and VAC does not work, all the heat of the spent fuel to raise
of temperature the pool water. It is hope that the result of this research can be used as a reference of
spent fuel interim storage pool operation at the normal and abnormal conditions.
Keywords: Spent fuel, heat transfer

OPTIMALISASI PENDINGINAN BAHAN BAKAR BEKAS REAKTOR SERBA GUNA –
SIWABESSY DI INSTALASI PENYIMPANAN SEMENTARA. Telah dilakukan studi optimalisasi sistem
pendinginan bahan bakar nuklir bekas di instalasi penyimpanan sementara tipe basah. Penelitian
dilakukan berdasarkan data spesikasi teknik dan data yang diperoleh dilapangan, diantaranya fraksi
bakar 72 dan 56 %, loading bahan bakar 42 dan 24 perangkat per-tahun. Tujuan penelitian antara lain
untuk memperoleh nilai beban panas total, kenaikan suhu air kolam dan waktu pengoperasian sistem
pendingin pada setiap kondisi. Hasil perhitungan diperoleh kesimpulan : Fraksi bakar bahan bakar
bekas mempengaruhi besaran beban pendinginan (cooling load) yang diterima air kolam
penyimpanan, pada kondisi sistem pendingin berfungsi dan VAC tidak berfungsi, kenaikan suhu air
kolam lebih kecil karena sebagian panas terambil oleh udara ruangan melalui konveksi dan radiasi.
Sedangkan pada kondisi sistem pendingin dan VAC tidak berfungsi, seluruh panas bahan bakar bekas
menaikkan suhu air kolam. Diharapkan hasil penelitian ini dapat dijadikan sebagai rujukan
pengoperasian kolam Penyimpanan Sementara Bahan Bakar Bekas pada saat kondisi normal dan
abnormal.
Kata kunci: Bahan bakar nuklir bekas, perpindahan panas