?url_ver=Z39.88-2004&rft_id=2017041053&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rft.title=ANALISIS+PERPINDAHAN+PANAS+SIRKULASI+ALAMI+GARAM+BAHAN+BAKAR+THORIUM+MOLTEN+SALT+REAKTOR+(TMSR)+DALAM+OPERASI+NORMAL+DAN+KECELAKAAN+MENGGUNAKAN+COMSOL+MULTIPHYSICS&rft.creator=Rindiani+Aprillia%2C+%2C+Cauntesa&rft.subject=530+Fisika&rft.description=Seperti+halnya+dengan+tipe+MSR+lainnya%2C+dua+masalah+keselamatan+utama+dari+TMSR+adalah+pendinginan+panas+sisa+dan+pembekuan+garam+cair+yang+tentunya+berhubungan+langsung+dengan+sistem+perpindahan+panas+pada+reaktor+nuklir.+Sirkulasi+alami+menjadi+sistem+keselamatan+pasif+pada+reaktor+generasi+keempat+dan+disebut-sebut+efektif+dalam+menstabilkan+suhu+reaktor+jika+terjadi+kecelakaan+seperti+gagalnya+sistem+pendingin+utama+reaktor.+Pada+penelitian+ini+dilakukan+analisis+mengenai+perpindahan+panas+sirkulasi+alami+pada+garam+bahan+bakar+TMSR+dalam+operasi+normal+maupun+kecelakaan+LOHS+melalui+parameter+suhu%2C+kecepatan+fluida%2C+dan+tekanan.+Metode+yang+digunakan+adalah+simulasi+CFD+2D+pada+geometri+loop+sirkulasi+alami+berukuran+2%C3%974+m+menggunakan+COMSOL+Multiphysics.+Hasil+simulasi+menunjukkan+bahwa+dalam+kondisi+normal%2C+sirkulasi+alami+mempertahankan+distribusi+suhu+garam+bahan+bakar+yang+stabil+dengan+suhu+tertinggi+di+dekat+pemanas+892+K+dan+terendah+di+dekat+pendingin+890+K%2C+kecepatan+aliran+fluida+konsisten+sekitar+0%2C007+m%2Fs%2C+serta+tekanan+lebih+rendah+-9882+Pa+di+area+atas+loop+dan+tekanan+lebih+tinggi+99327+Pa+di+area+bawah+loop.+Selama+LOHS%2C+suhu+yang+awalnya+tidak+stabil+akhirnya+menjadi+seragam+di+893+K%2C+menunjukkan+ketidakstabilan+sistem.+Kecepatan+aliran+fluida+menurun+masing-masing+sebesar+0%2C002+m%2Fs+setelah+pendingin+dan+0%2C003+m%2Fs+setelah+pemanas%2C+sementara+tekanan+setelah+pemanas+meningkat+-9822+Pa+dan+setelah+pendingin+menurun+99326+Pa.+Meski+sirkulasi+alami+tetap+berfungsi%2C+efisiensi+sistem+menurun+akibat+perubahan+kondisi+ekstrem%2C+yang+berdampak+pada+performa+sirkulasi+alami.%0D%0A%0D%0AKata+kunci%3A+perpindahan+panas%2C+sirkulasi+alami%2C+TMSR%2C+LOHS%2C+reaktor+nuklir%0D%0A%0D%0A%0D%0A%0D%0A%0D%0A%0D%0A%0D%0AABSTRACT%0D%0A%0D%0ATwo+significant+safety+concerns+associated+with+TMSR%2C+as+with+other+MSR%2C+are+residual+heat+cooling+and+molten+salt+freezing.+These+issues+are+intrinsically+linked+to+the+reactor's+heat+transfer+system.+Natural+circulation%2C+a+passive+safety+feature+inherent+to+fourth-generation+reactors%2C+is+designed+to+stabilize+reactor+temperature+in+the+event+of+an+accident%2C+such+as+a+failure+of+the+main+cooling+system.+This+research+examines+the+heat+transfer+in+TMSR+fuel+salt+under+both+normal+operation+and+Loss+of+Heat+Sink+(LOHS)+accidents%2C+with+a+particular+focus+on+temperature%2C+fluid+velocity%2C+and+pressure.+Two-dimensional+computational+fluid+dynamics+(CFD)+simulations+were+conducted+using+COMSOL+Multiphysics+on+a+2%C3%974+m+natural+circulation+loop.+The+results+demonstrate+that+under+normal+operating+conditions%2C+the+system+maintain+stable+fuel+salt+temperature+distribution%2C+with+the+highest+temperature+close+to+the+heater+at+892+K+and+the+lowest+temperature+close+to+the+cooler+at+890+K.+The+fluid+velocity+remains+constant+at+0.007+m%2Fs%2C+while+pressure+fluctuates+between+-9882+Pa+(upper+loop)+and+99327+Pa+(lower+loop).+During+a+loss+of+heat+sink+(LOHS)+accident%2C+the+initially+unstable+temperature+stabilizes+at+893+K%2C+indicating+system+instability.+The+fluid+velocity+decreases+by+0.002+m%2Fs+after+cooling+and+0.003+m%2Fs+after+heating%2C+while+the+pressure+increases+by+-9822+Pa+after+heating+and+decreases+by+99326+Pa+after+cooling.+Despite+the+persistence+of+natural+circulation%2C+its+efficiency+declines+due+to+the+extreme+condition+changes%2C+affecting+performance.%0D%0A%0D%0AKeywords%3A+heat+transfer%2C+natural+circulation%2C+TMSR%2C+LOHS%2C+nuclear+reactor&rft.publisher=FAKULTAS+MATEMATIKA+DAN+ILMU+PENGETAHUAN+ALAM+&rft.date=2024-11-20&rft.type=Skripsi&rft.type=NonPeerReviewed&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F80832%2F1%2FABSTRAK.pdf&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F80832%2F2%2FSKRIPSI%2520FULL.pdf&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F80832%2F3%2FSKRIPSI%2520TANPA%2520BAB%2520BAB%2520PEMBAHASAN.pdf&rft.identifier=++Rindiani+Aprillia%2C+%2C+Cauntesa++(2024)+ANALISIS+PERPINDAHAN+PANAS+SIRKULASI+ALAMI+GARAM+BAHAN+BAKAR+THORIUM+MOLTEN+SALT+REAKTOR+(TMSR)+DALAM+OPERASI+NORMAL+DAN+KECELAKAAN+MENGGUNAKAN+COMSOL+MULTIPHYSICS.++FAKULTAS+MATEMATIKA+DAN+ILMU+PENGETAHUAN+ALAM+%2C+UNIVERSITAS+LAMPUNG.+++++&rft.relation=http%3A%2F%2Fdigilib.unila.ac.id%2F80832%2F