Front-end investigations of the coated particles of nuclear fuel samples – ION polishing method

Nuclear power plants to generates electric energy used nuclear fuel such as Uranium Oxide (UOX). A typical VVER−1000 reactor uses about 20–25 tons of spent fuel per year. The fuel transmutation of UOX fuel was evaluated by VISTA computer code. In this estimation the front end and back end components of fuel cycle was calculated. The front end of the cycle parameter are FF requirements, enrichment value requirements, depleted uranium amount, conversion requirements and natural uranium requirements. The back-end component is Spent Fuel (SF), Actinide Inventory (AI) and Fission Product (FP) radioisotopes.

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From uranium ore to fuel element: the front-end of the nuclear fuel cycle

World Nuclear Power ◽

10.4324/9781315141657-8 ◽

2017 ◽

pp. 155-185

Author(s):

Peter R. Mounfield

Keyword(s):

Fuel Element ◽

Nuclear Fuel ◽

Fuel Cycle ◽

Nuclear Fuel Cycle ◽

Uranium Ore ◽

Front End

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Development of Analytical Procedures for Chemical Characterization of Substrates for the Production of TRISO Coated Particles as Nuclear Fuel in High Temperature Gas-Cooled Reactors

Sustainability ◽

10.3390/su12177221 ◽

2020 ◽

Vol 12 (17) ◽

pp. 7221

Author(s):

Ewelina Chajduk ◽

Paweł Kalbarczyk ◽

Jakub Dudek ◽

Marta Pyszynska ◽

Anna Bojanowska-Czajka ◽

...

Keyword(s):

High Temperature ◽

Nuclear Fuel ◽

Inductively Coupled Plasma ◽

Chemical Characterization ◽

Quantitative Chemical Analysis ◽

Coated Particles ◽

Icp Ms ◽

Analytical Procedures ◽

High Temperature Gas

High temperature gas-cooled reactors have recently gained importance as a source of electricity and process heat. Nuclear fuel used in these reactors consists of TRISO (TRiple coated ISOtropic) coated particles, where spherical grains of UO2 or UC2 or UCO kernel are covered with four successive layers consisting of pyrolytic carbon and silicon carbide. Of great importance is the chemical purity of reagents and substances used for the production of TRISO coated fuel particles. Analytical techniques ensuring the determination of elements at trace levels are inductively coupled plasma mass spectrometry (ICP-MS) and neutron activation analysis (NAA). They were applied in this work for the chemical characterization of substrates used for TRISO fuel production. Two analytical procedures were developed: the first, where materials are analyzed using ICP-MS, and the second with the aid of NAA. Successive stages of these procedures are described with details. Results of quantitative chemical analysis of examined substances are reported as well as detection limits for the investigated elements. Moreover, the expanded uncertainties estimated for the determined elements while employing the devised analytical procedures are presented.

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