International cooperation in age-dating uranium standards for nuclear forensics using the 231Pa/235U radiochronometer

Denton, Joanna S.; Treinen, Kerri C.; Chen, Yan; Baransky, Eva J.; Gaffney, Amy M.; Huang, Sheng-Hui; Kayzar-Boggs, Theresa M.; Samperton, Kyle M.; Steiner, R. E.; Wende, Allison M.; Williams, Ross W.; Zhao, Yuqing

doi:10.1007/s10967-020-07084-x

Cited by 5 publications

(8 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…LANL approached sample digestion and Pa separation method development for the U–Nb alloys in the same manner as the other laboratories, applying their standard operating procedures and adjusting protocols only as needed. Due to LANL and LLNL’s shared history as U.S.-based laboratories that have long collaborated on radiochronometry analyses, their standard operating procedures share many common components [ 29 , 40 ]. The LANL standard procedure for sample digestion involves an initial acid leach to remove surface oxidation, followed by complete sample dissolution in 8 M HNO 3 at 130 °C and then subsequent dilution to 4 M HNO 3 + 0.005 M HF [ 40 ].…”

Section: Methods Developmentmentioning

confidence: 99%

“…Due to LANL and LLNL’s shared history as U.S.-based laboratories that have long collaborated on radiochronometry analyses, their standard operating procedures share many common components [ 29 , 40 ]. The LANL standard procedure for sample digestion involves an initial acid leach to remove surface oxidation, followed by complete sample dissolution in 8 M HNO 3 at 130 °C and then subsequent dilution to 4 M HNO 3 + 0.005 M HF [ 40 ]. When applying this method to the U–Nb alloy samples, the same aforementioned white precipitates formed and remained.…”

Section: Methods Developmentmentioning

confidence: 99%

“…To purify Pa of the remaining Nb, LANL next performed several experiments testing various modifications to their standard separation scheme involving three columns, one with AG1-X8 resin followed by two with silica gel [ 40 ]. Like the other laboratories, this standard procedure was optimized for pure uranium materials (oxides, metals, compounds).…”

Section: Methods Developmentmentioning

confidence: 99%

“…Both Dowex 1 (made by Dow Chemical) and AG 1 (made by Bio-Rad and Eichrom) are monofunctional strongly basic anion exchange resins and are recognized as functionally equivalent [ 31 ]

Fig. 12 Comparison of LANL’s a standard operating procedure for Pa separations on pure U materials [ 40 ] and b the modified procedure for depleted U–Nb alloys. LANL’s standard operating procedure for Pa separations involves one column with AG 1-X8, followed by two silica gel columns.…”

Section: Methods Developmentmentioning

confidence: 99%

See 3 more Smart Citations

Separation of protactinium from uranium-niobium alloys for 231Pa–235U radiochronometry in nuclear forensic investigations

Chen

Higginson

Kayzar-Boggs

et al. 2023

J Radioanal Nucl Chem

Self Cite

View full text Add to dashboard Cite

The isolation and purification of protactinium from uranium materials is essential for 231 Pa– 235 U radiochronometry, but separating Pa from uranium-niobium alloys, a common material in the nuclear fuel cycle, is challenging due to the chemical similarity of Pa and Nb. Here we present three resin chromatography separation techniques for isolating Pa from U and Nb which were independently developed by three different laboratories through ad hoc adaptations of standard operating procedures. Our results underscore the need for and value of purification methods suitable for a diversity of uranium-based materials to ensure the operational readiness of nuclear forensics laboratories. Supplementary Information The online version contains supplementary material available at 10.1007/s10967-023-08928-y.

show abstract

Section: Methods Developmentmentioning

confidence: 99%

Section: Methods Developmentmentioning

confidence: 99%

Section: Methods Developmentmentioning

confidence: 99%

“…Both Dowex 1 (made by Dow Chemical) and AG 1 (made by Bio-Rad and Eichrom) are monofunctional strongly basic anion exchange resins and are recognized as functionally equivalent [ 31 ]

Section: Methods Developmentmentioning

confidence: 99%

See 2 more Smart Citations

Separation of protactinium from uranium-niobium alloys for 231Pa–235U radiochronometry in nuclear forensic investigations

Chen

Higginson

Kayzar-Boggs

et al. 2023

J Radioanal Nucl Chem

Self Cite

View full text Add to dashboard Cite

show abstract

“…Ketika bahan nuklir dimurnikan saat proses produksi, kotoran dihilangkan (termasuk isotop anak luruhnya), setelah itu produk peluruhan mulai tumbuh dalam bahan melalui peluruhan radioaktif. [8], [9].…”

Section: Pendahuluanunclassified

Penentuan Umur Yellow Cake Secara Radiokronometri

Noerpitasari

Fatimah²,

Haryati³

et al. 2020

urania

View full text Add to dashboard Cite

PENENTUAN UMUR YELLOW CAKE SECARA RADIOKRONOMETRI. Penentuan umur yellow cake secara radiokronometri telah dilakukan. Penelitian ini bertujuan mendapatkan data umur yellow cake pada penyusunan basis data perpustakaan forensik nuklir. Radiokronometer yang digunakan yaitu 228Th/232Th. 232Th merupakan thorium yang secara alami terdapat dalam yellow cake dan telah mencapai kesetimbangan peluruhan menjadi 228Th, namun pada proses produksi yellow cake kesetimbangannya terganggu sehingga waktu dinolkan kembali. Sampel uji yaitu yellow cake Cogema, hasil tambang PTBGN di Kalan dan hasil samping produk pabrik Petrokimia Gresik. Tahapan yang dilakukan yaitu pelarutan sampel, pemisahan thorium dari uranium dengan metode kromatografi pertukaran kation menggunakan resin dowex 50W-X8, elektrodeposisi thorium dan analisis isotop menggunakan spektrometer alfa. Penentuan umur dilakukan dengan perhitungan rasio aktivitas 228Th/232Th dan iterasi rumus peluruhan. Berdasarkan hasil analisis isotop 228Th dan 232Th menggunakan spektrometer alfa dan hasil perhitungan umur, yellow cake Cogema tidak dapat ditentukan umurnya karena tidak mengandung 232Th. Diperoleh nilai umur yellow cake Petrokimia Gresik yaitu 9,90 tahun dengan bias 20,35 tahun dan nilai umur yellow cake PTBGN yaitu 12,85 tahun dengan bias >20,15 tahun dibandingkan dengan perkiraan waktu produksi yang diketahui. Bias yang diperoleh lebih tinggi jika dibandingkan dengan hasil penentuan umur yellow cake menggunakan radiokronometer 228Th/232Th oleh peneliti sebelumnya yaitu dengan bias kurang dari 10 tahun.Kata kunci: Yellow Cake, Thorium, Radiokronometri.

show abstract

Improved methods to age-date uranium certified reference materials for nuclear forensics using the 231Pa/235U radiochronometer

Denton

Wende²,

Kayzar-Boggs³

et al. 2022

J Radioanal Nucl Chem

View full text Add to dashboard Cite

International cooperation in age-dating uranium standards for nuclear forensics using the 231Pa/235U radiochronometer

Cited by 5 publications

References 18 publications

Separation of protactinium from uranium-niobium alloys for 231Pa–235U radiochronometry in nuclear forensic investigations

Separation of protactinium from uranium-niobium alloys for 231Pa–235U radiochronometry in nuclear forensic investigations

Penentuan Umur Yellow Cake Secara Radiokronometri

Improved methods to age-date uranium certified reference materials for nuclear forensics using the 231Pa/235U radiochronometer

Contact Info

Product

Resources

About