Estimation of nuclear heating by delayed gamma rays from radioactive structural materials of HANARO

Noh, Tae-yang; Park, Byung-Gun; Kim, Myong-Seop

doi:10.1016/j.net.2018.01.010

Cited by 11 publications

(3 citation statements)

References 2 publications

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“…Untuk kasus lain akibat panas gamma sampel isotop medis Holmium-166 mengalami kerusakan pada mikrosfer [7]. Adapun penelitian mengenai panas gamma lainnya seperti estimasi pemanasan gamma yang tersimpan dalam sampel iridium di reaktor HANARO menggunakan MCNP dan kode aktivasi [8], pengukuran panas gamma pada bahan tertentu (Be, Hf) menggunakan detektor thermo-luminescent di teras reaktor riset JHR [9] dan Kajian panas gamma pada reaktor TRIGA MARK Bandung [10].…”

Section: Pendahuluanunclassified

ESTIMASI PANAS GAMMA PADA PRODUKSI RADIOISOTOP Lu-177, Ir-192, DAN Au-198 DI TERAS MOLIBDENUM RSG-GAS

Riskiana

Rohanda

Abdullatif

2022

urania

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ESTIMASI PANAS GAMMA PADA PRODUKSI RADIOISOTOP Lu-177, Ir-192, DAN Au-198 DI TERAS MOLIBDENUM RSG-GAS. Panas gamma (Gamma heating) merupakan isu penting terkait keselamatan fasilitas iradiasi suatu reaktor dan sampel iradiasinya. Panas gamma dihasilkan dari interaksi energi gamma dengan material target. Energi gamma yang dihasilkan dari reaktor memiliki karakteristik energi gamma yang berbeda yang salah satunya dipengaruhi oleh jenis bahan bakar (jenis teras). Uranium molibdenum (UMo) merupakan bahan bakar masa depan yang memiliki beberapa keunggulan dibandingkan uranium oksida (UO2) dan silisida (USi) salah satunya dapat meningkatkan operasi reaktor. Untuk itu dilakukan studi komputasi panas gamma RSG-GAS dengan bahan bakar UMo pada beberapa proses produksi radioisotop seperti radioisotop Lu-177, Ir-192, dan Au-198. Penelitian ini menggunakan code ORIGEN untuk menghitung energi gamma yang dihasilkan untuk jenis bahan bakar UMo. Estimasi panas gamma menggunakan program Gamset, suatu program didesain dan sudah teruji untuk menghitung panas gamma di RSG-GAS. Hasil perhitungan panas gamma berbahan bakar UMo di RSG-GAS dalam kisaran 4,85 W/g ~ 8,69 W/g . Hasil ini lebih kecil dibandingkan dengan panas gamma pada uranium silisida (USi) yaitu sekitar 9,27 W/g ~ 13,3 W/g. Radioisotop Lu-177 memiliki panas gamma terbesar sekitar 8,69 W/g, yang diikuti oleh Au-198 dan Ir-192 yang masing-masing sebesar 5,89 W/g dan 7,12 W/g. Panas gamma pada ketiga radioisotop yang diproduksi oleh RSG-GAS berbahan bakar UMo tidak melebihi panas gamma maksimum (20 W/g) yang telah ditentukan sehingga dapat diartikan aman untuk reaktor dan sampel.Kata kunci: Panas gamma, UMo, RSG-GAS, radioisotop

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Section: Pendahuluanunclassified

ESTIMASI PANAS GAMMA PADA PRODUKSI RADIOISOTOP Lu-177, Ir-192, DAN Au-198 DI TERAS MOLIBDENUM RSG-GAS

Riskiana

Rohanda

Abdullatif

2022

urania

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“…The investigations elsewhere employed the ORIGEN2 [11,12] and PHITS [13,14] computer code in the various nuclear field. Both software is known to be reliable [15][16][17].…”

Section: Introduction *mentioning

confidence: 99%

The Radioactivity Estimation of the Irradiated 13 Mev Cyclotron’s Concrete Shield

2020

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The Center for Accelerator Science and Technology (PSTA) planned to install K500 concrete shield in its 13 MeV cyclotron facility (DECY-13). However, fast neutrons that are generated by this cyclotron could activate materials of the concrete. It may harm the radiation workers. In this work, we conducted simulations using ORIGEN2 and PHITS computer code to estimate the formed radioactivity and the neutron flux distribution in the DECY-13 cyclotron's concrete shield. Based on the simulation, the induced radioactivity is 2.3478 × 109 Bq, while its gamma dose rate is 22.09 µSv/m2h. The most contributed isotopes are Th-233, Ho-166, Al-28, Mn-56 and Si-31. This dose is quite high. Neutron fluxes in the rear of the simulated concrete shield are also still prominent. Accordingly, it is necessary to attach neutron shielding materials which do not generate high-intensity gamma-ray. The formed radioactivity is high; but it appears from the short half-life isotopes such as Th-233, Ho-166, Al-28, Mn-56 and Si-31. Its activity will diminish quickly after the cyclotron is off. Hence, it will be safe for radiation workers.Keywords: Radioactivity, Concrete Shield, 13 MeV Cyclotron, Neutron Irradiation, DECY-13, PHITS

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“…In the reaction (Equation 1), N 16 produces high-strength radiation of gamma (γ) rays (6 MeV) and β particles during its decays [7,8].…”

Section: Introductionmentioning

confidence: 99%

Conceptual Design On N16 Decay Chamber For Modified TRIGA-2000 With Plate-Type Fuel

Dibyo¹,

Pinem

Wardhani³

2018

Jurnal Pengembangan Energi Nuklir

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Conceptual Design On N16 Decay Chamber For Modified TRIGA-2000 With Plate-Type Fuel. the TRIGA-2000 is a research reactor in bandung that will be modified using plate-type fuel. The reactor core cooling system is changed from the natural convection cooling mode to the forced convection mode. The purpose of the study is to assess the conceptual design for the decay chamber of N16 nuclide in the primary cooling system of the reactor. In this design, the hold-up system decays the nuclide of N16 resulted from neutron activation product. In the period of 50 seconds, the activity of N16 (T1/2= 7.13 seconds) decays 7 time from half life to low level. The cube shape of decay chamber is provided a plate with 4 hollows and facility to flush the cavitation bubbles. The decay chamber, which is submerged into the bulk shielding as located outside of the reactor pool. The conceptual design uses the Fluent software compared with the analytical estimation for flow velocity in the decay chamber. The result shows a good agreement range with the analytical estimations. The uniform flow profile can be obtained at the velocity of about 0.4 m/s. Water flow life time of 50 seconds in the decay chamber with the capacity of 3.5 m3 is able to decay the N16 nuclide to low level. This decay chamber is expected to contribute in completing the design of reactor primary coolant system using the forced convection mode.

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Estimation of nuclear heating by delayed gamma rays from radioactive structural materials of HANARO

Cited by 11 publications

References 2 publications

ESTIMASI PANAS GAMMA PADA PRODUKSI RADIOISOTOP Lu-177, Ir-192, DAN Au-198 DI TERAS MOLIBDENUM RSG-GAS

ESTIMASI PANAS GAMMA PADA PRODUKSI RADIOISOTOP Lu-177, Ir-192, DAN Au-198 DI TERAS MOLIBDENUM RSG-GAS

The Radioactivity Estimation of the Irradiated 13 Mev Cyclotron’s Concrete Shield

Conceptual Design On N16 Decay Chamber For Modified TRIGA-2000 With Plate-Type Fuel

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