Characterization of HWR fuel pellets fabricated using UO2 powders from different conversion processes

Lee, Y.W.; Yang, Myung-Seung

doi:10.1016/0022-3115(91)90389-o

Cited by 21 publications

(10 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Proses pengendapan dapat dilakukan melalui jalur amonium diranat (ADU) atau amonium uranil karbonat (AUK). ADU dihasilkan dari proses pengendapan dengan bahan pengendap amonium hidroksida, sedangkan AUK diperoleh dengan bahan amonium karbonat [4,5]. Endapan ADU dan AUK dikalsinasi hingga terbentuk serbuk UO 2 yang diharapkan berderajat nuklir.…”

Section: Pendahuluanunclassified

Penentuan Kadar Uranium Dalam Serbuk Uo2 Dari Yellow Cake Secara Potensiometri Dan Gravimetri

Windaryati¹,

Ngatijo²,

Pranjono³

et al. 2017

jfn

View full text Add to dashboard Cite

PENENTUAN KADAR URANIUM DALAM SERBUK UO2 DARI YELLOW CAKE SECARA POTENSIOMETRI DAN GRAVIMETRI. Telah dilakukan penentuan kadar uranium dalam serbuk UO2 dari yellow cake yang berasal dari Pusat Teknologi Bahan Galian Nuklir (PTBGN). Serbuk UO2 yang ditentukan kadar uraniumnya merupakan hasil konversi yellow cake melalui jalur amonium diuranat (ADU) dan amonium uranil karbonat (AUK). Dalam penentuan kadar uranium diperlukan suatu metode yang valid sehingga diperoleh data yang akurat. Dalam kegiatan ini dibandingkan dua metode penentuan kadar uranium dalam serbuk UO2, yaitu secara potensiometri dan secara gravimetri. Tujuannya untuk menentukan mana metode yang memberikan hasil dengan ketelitian dan presisi tinggi. Penentuan kadar uranium secara potensiometri mengacu kepada ASTM C1267-11 yang dimodifikasi dengan mereduksi pemakaian pereaksi menjadi 10% dari metode asli, sedangkan metode gravimetri mengacu kepada ASTM C1453-00 (2011). Penentuan kadar uranium secara potensiometri berdasarkan oksidasi-reduksi, sedangkan secara gravimetri berdasarkan perubahan berat setelah serbuk UO2 dikalsinasi pada temperatur 900°C selama 3 jam hingga diperoleh berat konstan. Dari kegiatan ini diperoleh hasil rerata untuk penentuan kadar uranium dalam serbuk UO2 melalui jalur ADU dan AUK secara potensiometri masing-masing adalah (87,4019 ± 0,7873) % dan (87,5575 ± 0,4775) %, sedangkan secara gravimetri masing-masing adalah (87,5241 ± 0,0432) % dan (87,4492 ± 0,0440) %. Uji t dari kedua metode menunjukkan bahwa hasil penentuan kadar uranium tidak mempunyai perbedaan yang signifikan. Oleh sebab itu, penentuan kadar uranium dalam serbuk UO2 pada penelitian berikutnya digunakan metode gravimetri karena lebih mudah tahapan pengerjaannya dibandingkan dengan metode potensiometri.

show abstract

Section: Pendahuluanunclassified

Penentuan Kadar Uranium Dalam Serbuk Uo2 Dari Yellow Cake Secara Potensiometri Dan Gravimetri

Windaryati¹,

Ngatijo²,

Pranjono³

et al. 2017

jfn

View full text Add to dashboard Cite

show abstract

“…The manufacture of the UO2 nuclear fuel pellets includes the conversion of UF6 into UO2 powder and the fabrication of UO2 pellets from such UO2 powder [1][2][3]. In regard to the conversion of UF6 into UO2 powder, many dry and wet conversion methods have been developed [4][5][6][7][8][9]. In a former wet conversion, UF6 was hydrolyzed in water to form uranyl fluoridefluoride acid (UO2F2-HF) solution.…”

Section: Introductionmentioning

confidence: 99%

“…Subsequently, the solution was precipitated through either an ammonium di-uranate (ADU) route or an ammonium uranyl carbonate (AUC) route. These ADU and/or AUC powders are then calcinated and reduced into UO2 powders [5][6][7][8][9]. The ex-ADU UO2 powder possesses some characteristics different from the ex-AUC UO2 powder, such as particle size and flowability [7][8][9].…”

Section: Introductionmentioning

confidence: 99%

“…These ADU and/or AUC powders are then calcinated and reduced into UO2 powders [5][6][7][8][9]. The ex-ADU UO2 powder possesses some characteristics different from the ex-AUC UO2 powder, such as particle size and flowability [7][8][9]. The flowability and the particle size of the ex-AUC UO2 powder are better than those of the ex-ADU UO2 powder, so press feed preparation stage (pre-pressing and granulation) might be omitted for UO2 ceramic pellet preperated from the ex-AUC UO2 powder [1,[7][8][9].…”

Section: Introductionmentioning

confidence: 99%

“…The parameters of the UO2 preparation strongly affect the final characteristics of UO2 powder and, therefore, have an effect on UO2 pelletizing [6][7][8][9]. Specific surface area (SSA) of the UO2 powder is one of the most important characteristics affecting the activity and the correspondence of the powder during UO2 ceramic pellet fabrication.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

The Brandon mathematical model describing the effect of calcination and reduction parameters on specific surface area of ex-ADU UO₂ powders

Nguyen¹,

Le²

2016

Nucl. Sci. and Tech.

View full text Add to dashboard Cite

The report “Brandon mathematical model describing the effect of calcination and reduction parameters on speciﬁc surface area of UO2 powders” [14] has built up a mathematical model describing the effect of the fabrication parameters on SSA (Specific Surface Area) of ex-AUC (Ammonium Uranyl Carbonate) UO2 powders. In the paper, the Brandon mathematical model that describe the relationship between the essential fabrication parameters [reduction temperature (TR), calcination temperature (TC), calcination time (tC) and reduction time (tR)] and SSA of the obtained ex-ADU (Ammonium Di-Uranate) UO2 powder product has established. The proposed model was tested with Wilcoxon’s rank sum test, showing a good agreement with the experimental parameters. The proposed model can be used to predict and control the SSA of ex-ADU UO2 powders

show abstract

Comparison of morphologies of a uranyl peroxide precursor and calcination products

Tamasi

Cash

Mullen

et al. 2016

J Radioanal Nucl Chem

View full text Add to dashboard Cite

Characterization of HWR fuel pellets fabricated using UO2 powders from different conversion processes

Cited by 21 publications

References 3 publications

Penentuan Kadar Uranium Dalam Serbuk Uo2 Dari Yellow Cake Secara Potensiometri Dan Gravimetri

Penentuan Kadar Uranium Dalam Serbuk Uo2 Dari Yellow Cake Secara Potensiometri Dan Gravimetri

The Brandon mathematical model describing the effect of calcination and reduction parameters on specific surface area of ex-ADU UO₂ powders

Comparison of morphologies of a uranyl peroxide precursor and calcination products

Contact Info

Product

Resources

About