scholarly journals Development of Industrial-Scale Fission 99Mo Production Process Using Low Enriched Uranium Target

2016 ◽  
Vol 48 (3) ◽  
pp. 613-623 ◽  
Author(s):  
Seung-Kon Lee ◽  
Gerd J. Beyer ◽  
Jun Sig Lee
Keyword(s):  
Production Process ◽  
Industrial Scale ◽  
99Mo Production ◽  
Uranium Target ◽  
Enriched Uranium

scholarly journals New head process for non-HEU 99Mo production based on the oxidation of irradiated UO2-pellets forming soluble U3O8

2016 ◽  
Vol 31 (1) ◽  
pp. 102-108 ◽  
Author(s):  
Gerd Beyer ◽  
Bernd Eichler ◽  
Teja Reetz ◽  
Rudolf Muenze ◽  
Jozef Comor
Keyword(s):  
Starting Material ◽  
Nuclear Technology ◽  
Fuel Pellets ◽  
Production Processes ◽  
99Mo Production ◽  
Enriched Uranium

All fission-based 99Mo producers worldwide are required to convert their 99Mo production processes from using highly enriched uranium to low-enriched uranium. At a recent IAEA meeting in Vienna, problems related to bottlenecks and target modification and optimization of low-enriched uranium-based 99Mo production processes were discussed. Ceramic UO2-pellets (as used in fuel) were excluded from the discussion with the argument that this material cannot be dissolved under practically applicable conditions. In this paper, we suggest transforming the non-soluble ceramic UO2 fuel-pellets into the U3O8 form by simple oxidation and the use of the soluble U-oxide modification as the starting material for the 99Mo production processes. Due to the absence of Al, larger target quantities could be processed and the waste volume could still be kept small. The approach is known and proven in nuclear technology. In principle, this new head process can be connected to any of the presently used 99Mo production procedures.

scholarly journals A Look at the Industrial Production of Olefins Based on Naphtha Feed: A Process Study of a Petrochemical Unit

2021 ◽  
Author(s):  
Reza Davarnejad ◽  
Jamal Azizi ◽  
Shaghayegh Bahari
Keyword(s):  
Natural Gas ◽  
Crude Oil ◽  
Production Process ◽  
Industrial Production ◽  
Raw Materials ◽  
Production Unit ◽  
Industrial Scale ◽  
Ethylene Propylene ◽  
Liquid Feed ◽  
Process Study

Olefins (ethylene, propylene and butadiene) as raw materials play an important role in a lot of chemical and polymer products. In industrial scale, there are several techniques from crude oil, natural gas, coal and methanol for the olefins production. Each of these has some advantages. The petrochemicals with liquid feed can simultaneously produce all of the olefins. Shazand Petrochemical Co. (as the first olefins production unit in Iran) produces all of the olefins using naphtha (light and heavy) feed. In this chapter, the production process of olefins based on naphtha will be studied from the beginning to the end (involving pyrolysis, compression, chilling and fractionation processes).

scholarly journals Development of fission 99Mo production process using HANARO

2020 ◽  
Vol 52 (7) ◽  
pp. 1517-1523
Author(s):  
Seung-Kon Lee ◽  
Suseung Lee ◽  
Myunggoo Kang ◽  
Kyungseok Woo ◽  
Seong Woo Yang ◽  
...  
Keyword(s):  
Production Process ◽  
99Mo Production

scholarly journals The Effect of the Reaction pH on Properties of Lead(II) Azide

Materials ◽  
2021 ◽  
Vol 14 (11) ◽  
pp. 2818
Author(s):  
Jolanta Biegańska
Keyword(s):  
Production Process ◽  
Sodium Azide ◽  
Rapid Growth ◽  
Industrial Scale ◽  
Sediment Particles ◽  
Explosive Reaction ◽  
External Stimuli

Lead(II) azide is an initiating explosive; even a small amount can trigger an explosion caused by simple external stimuli, such as sparks, flames, friction or pinpricks, and is able to initiate the explosive reaction of rock-crushing explosives. Due to the fact that this initiating explosive triggers further reactions, the effect of priming detonators depends on the properties of its material. Its sensitivity is associated with the size of its crystals. For instance, it is used for mining detonators in the form of fine crystals. The quality of the crystals is also correlated to the safety of the production process, i.e., the crystals should be round-shaped rather than needle-like since breaking it would inevitably trigger an explosion. The process of lead(II) azide production on an industrial scale is based on the reaction of lead(II) nitrate with sodium azide with the presence of dextrin, which determines the desired shape of the crystals. The reaction pH affects the number of sediment particles formed in a periodical reactor. Changing the pH from 6.5 to 7.5 leads to the rapid growth of crystal particles.

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