Aerosol Source Terms Characterization During Cutting of Fuel Debris Simulants With Different Tools in the Context of Fukushima Daiichi Decommissioning

2021 ◽  
Author(s):  
Emmanuel Porcheron ◽  
Claire Dazon ◽  
Yohan Leblois ◽  
Christophe Chagnot ◽  
Ioana Doyen ◽  
...  
Keyword(s):  
Source Terms ◽  
Fukushima Daiichi ◽  
Aerosol Source

Aerosol Source Terms Characterization During Cutting of Fuel Debris Simulants With Different Tools in the Context of Fukushima Daiichi Decommissioning

2020 ◽  
Author(s):  
Emmanuel Porcheron ◽  
Claire Dazon ◽  
Yohan Leblois ◽  
Thomas Gelain ◽  
Christophe Chagnot ◽  
...  
Keyword(s):  
Cutting Tools ◽  
Source Terms ◽  
Research Project ◽  
Fukushima Daiichi ◽  
Aerosol Source ◽  
Research Institute

Abstract Assessing the production and dispersion of aerosols carrying contamination during Fukushima fuel debris retrieval is IRSN’s contribution to a research project undertaken by a French consortium jointly with ONET Technologies and CEA on behalf of METI and managed by the Mitsubishi Research Institute (Georges et al. 2017). The objective is to obtain quantified data for evaluating the risk of disseminating contamination when implementing cutting tools such as laser or others such as mechanical one, over the next few years, in the process of decommissioning the damaged reactors at the Fukushima-Daiichi plant.

Experiments on Liquid-Metal Fast Breeder Reactor Aerosol Source Terms After Severe Accidents

1988 ◽  
Vol 81 (2) ◽  
pp. 257-277 ◽  
Author(s):  
Georges Berthoud ◽  
Albert W. Longest ◽  
Anthony L. Wright ◽  
Wolfgang P. Schütz
Keyword(s):  
Liquid Metal ◽  
Fast Breeder Reactor ◽  
Source Terms ◽  
Severe Accidents ◽  
Aerosol Source

Simulation of Radiation Monitoring Instruments Data for Emergency Response Exercises

2017 ◽  
Author(s):  
Liu Wang ◽  
Liao Feiye ◽  
Jiang Pingting ◽  
He Dongyu ◽  
Luo Yong ◽  
...  
Keyword(s):  
Emergency Response ◽  
Radiation Monitoring ◽  
Severe Accident ◽  
Source Terms ◽  
Simulation Code ◽  
Response Level ◽  
Calculation Results ◽  
Fukushima Daiichi ◽  
Response Exercise

Radiation monitoring instruments (KRT) is important to decide emergency response level (EAL) in accident situation. Emergency response drills is more and more significant after Fukushima Daiichi severe accident. This article develops a code to simulate radiation monitoring instruments data for emergency response exercises. A part of calculated input of the code comes from MAAP calculated results included source terms and thermo hydraulic data. KRT simulation code runs with MAAP calculation results and output KRT simulated value at the same time. This article gives a way to prove the result of KRT simulation code analyzed is correct and matched through simulating an emergency response exercise scenario.

Brief Analysis of the Simulative Plutonium Aerosol Source-Term in the Circumstance of High Explosive Detonation

2012 ◽  
Vol 518-523 ◽  
pp. 946-950
Author(s):  
Wen Jie Liu ◽  
Peng Lai Wang ◽  
Zhi Qiang Xiao
Keyword(s):  
Original Work ◽  
Source Term ◽  
High Explosive ◽  
Source Terms ◽  
Respirable Fraction ◽  
Mass Fractions ◽  
Cumulative Mass ◽  
Aerosol Source ◽  
Explosive Detonation ◽  
Human Death

The plutonium material in weapons grade nuclear device would be aerosolized and dispersed into the atmosphere if the device was involved in a high explosive detonation. It is significant to investigate the environmental and public hazard caused by the possible dispersion of plutonium. The original work is to determine the source terms of plutonium aerosol in certain nuclear accident scenario. In such scenario the inhalation of plutonium aerosols is the main human hazard source. Only the plutonium aerosols with aerodynamic diameter less than 10 μm are respirable and may ultimately lead to fatal human death. The field detonation test with plutonium by U.S. government is reviewed and the results indicate that for expected high explosive detonation scenario the plutonium source terms are 100 % aerosolization and 20 % respirable fraction. In order to find the aerosolized similarity of plutonium and several conventional metals, two detonation experiments in which the stannum foil and the vanadium powder are used as the replacement of plutonium respectively have been conducted by our group. After the detonation the metal aerosols are collected and analyzed. It has been found that the metallic powder is much easier to be aerosolized than the foil while the integrated aerosol source terms (respirable mass fractions) of stannum and vanadium are quite different with plutonium. Unlike the integrated aerosol data, the differential source terms (cumulative mass fractions via particle size) of the simulative samples are partially similar with plutonium.

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