MODARIA II WG 4 : Working Group 4 Transfer processes and data for - - PowerPoint PPT Presentation

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Feb 21, 2023 214 likes •350 views

MODARIA II WG 4 : Working Group 4 Transfer processes and data for radiological impact assessment SG1: Terrestrial, freshwater and marine K d SG2: Fukushima data SG3: Non-temperate systems Assessing the radiological impact from

SLIDE 1

MODARIA II

WG 4 : Working Group 4 – Transfer processes and data for radiological impact assessment

SG1: Terrestrial, freshwater and marine Kd
SG2: Fukushima data
SG3: Non-temperate systems

SLIDE 2

Assessing the radiological impact from radioactivity in the environment

To adequately quantify the key transfer processes and recognise their limitations in radiological assessments

improve understanding and quantification of key

processes The transfer processes and related data will vary depending on the situation considered;

planned, existing and emergency exposure situations
characteristics of the environment
terrestrial, freshwater, marine
temperate or non-temperate systems

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WG4: Objectives for three sub groups

To identify key transfer processes for

radioactivity in the environment, in the context

f the situation under consideration, for use in

radiological impact assessment and to provide analysis of key relevant data. Current Focus on Kd

To consider the impact of the accidental release

from the Fukushima Dai-ichi site in Japan in 2011 and the applicability of existing models and data to the Japanese situation.

To provide advice on the applicability of

assessment models to tropical, semi-arid and arid environments.

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Relevance to regulatory goals of IAEA

Human and environmental radiological protection in situations of regular operational activities and in accidental scenarios. WG4 is working toward:

Strengthening evaluation of the radiological impact by

improving the data underpinning the models developed for assessing the transfer of RNs in the environment and the radiological impact

To more appropriately assess exposure levels of the

public and in the environment - to ensure an appropriate level of protection from the effects of ionizing radiation, associated with radionuclide releases and from existing radionuclides in the environment

SLIDE 5

WG 4 report status

Final draft submitted Feb 2018
Formatted and reviewed
Revision this TM and until end 2018

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MODARIA II WG4

Revision and Improvement of Kd Values for Terrestrial, Freshwater and Marine Systems ▪ Continued collation and analysis of Kd values incl. Fukushima data ▪ Development of database

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Development of global database of Kd values

Harmonisation of soil, freshwater and marine data

required.

Requires Kd data and other relevant meta-data to be

collated i.e. information on soil/sediment/seawater etc.

Prototype database developed – testing required.

SLIDE 8

Review of IAEA MARiS (Marine Information System) Database

Feasibility of using

MARiS database as global repository of Kd data investigated.

MARiS has the

potential to generate Kd values.

Ongoing discussions.

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WG4 sub-group

Collation of environmental transfer parameters after the Fukushima accident

(Fukushima parameters)

1st Interim meeting @ University of Tsukuba, 10-12 July, 2017

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WG4 – SG3 Transfer Parameters in Non- temperate Systems

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Köppen Geiger climate classification

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Groups

2.1 Group A: Tropical/megathermal climates
2.1.1 Tropical rainforest climate
2.1.2 Tropical monsoon climate
2.1.3 Tropical wet and dry or savanna climate
2.2 Group B: Dry (desert and semi-arid) climates
2.3 Group C: Temperate/mesothermal climates
2.3.1 Mediterranean climates
2.3.2 Humid subtropical climates
2.3.3 Oceanic climate
2.3.4 Highland climates
2.4 Group D: Continental/microthermal climates
2.4.1 Hot summer continental climates
2.4.2 Warm summer continental or hemiboreal climates
2.4.3 Subarctic or boreal climates
2.5 Group E: Polar climates