MODARIA II WG4 : Working Group 4 – Transfer processes and data for radiological impact assessment
Three sub groups • Kd datasets • Fukushima data • Non ‐ temperate transfer parameters
WG 4 report status • Significant improvements to draft Report • Prioritising data gaps • Kd – soils, freshwater (marine) • Transfer to animal products and to wild game in Japan • Specified text queries to sub chapter authors t return by end Nov • WG leader review, peer review • Finalise early 2017
Marine K d activities in MODARIA • Critical Review of IAEA TRS ‐ 422 • Discussed derivation of previous Kd value compilations • Discussed MARiS • Presented various Japanese data: • Factors influencing variability of marine K d data • Apparent or time dependent Kd values after Fukushima
Current marine K d info in MODARIA report • Factors influencing variability of marine K d data: • Use of stable element data v. global fallout data • Sediment characteristics • Sedimentation rate • Exchangeable fraction Cs Sr
Marine K d – This week • Discussed potential data sources • Met with WG7 to discuss proposal • Feedback required from WG7 on information required to use Kd in dispersion models • Feasibility of using MARiS database being examined • Discussed common database approach for freshwater, soil and marine K d
Marine K d – Next Steps • Liaise further with WG7 on requirements • Review proposed data structures for soil and freshwater databases. • Discuss use of MARiS with IAEA MEL, Monaco • Start to collate data • Develop preliminary data structure using specific elements, e.g. Sr and Cs, and discuss at interim meeting
Fuk Fukushim shima par parameter da datase sets ts Countries: UK, France, Korea, Germany, Japan, Australia, Austria, • [Cs ‐ 137] change with time (trees, herbaceous plants, freshwater and marine biota) presented. • Connectivity between different parts of the contaminated ecosystems. Eg ‐ Radiocaesium loss from forested catchments, via aquatic pathways and erosion, to paddy fields and coastal areas. Forest Marine River Catchment Paddy field
Da Data & par parameters of of in interest • Agreed that equilibrium empirical ratios given in TRS ‐ 472 are not appropriate for dynamic conditions of the first 3 ‐ 4 y post accident. • Time series data are more appropriate effective half ‐ lives. • Recent data on changes in empirical ratios with time indicate that RCs released from the Fukushima accident is starting to behave like nuclear weapons fallout RCs. • Time series data (e.g. leaves, 10000 branches, throughfall in forest ) Pacific cod, Gadus macrocephalus taken soon after the accident are unique and valuable 1000 • DATABASE: Forest database example CR • recognized that QC (who inputs data 100 & when, who checked it & when) needs to be done 10 0 5 0 5 0 5 0 5 0 8 8 9 9 0 0 1 1 2 9 9 9 9 0 0 0 0 0 1 1 1 1 2 2 2 2 2
Associate experts (need volunteers!) International experts Scientific contributors (world ‐ wide) River: IAEA, UK, France, Spain, US Marine Biota: Australia, UK, Korea Rice: IAEA, UK, Germany Forest: France, UK, Germany Parameter database Game animals: UK, Australia, Korea WG 4 • Data collation • Data analysis Japan research group leaders Agricultural crops Fresh water Biota Game animals Marine Biota River: Mr. Seiji Hayashi (NIES) Rice (TF) Forest River Marine Biota: Mr. Hyoe Takata (MERI) Rice: Mr. Hirofumi Tsukada (Fukushima Univ.) Forest: Mr. Shoji Hashimoto (FFPRI) Game animals: Ms. Keiko Tagami (QST)
In Interim rim me meet eting (Fuk ukushi ushima par parameter sub sub ‐ gr group) oup) • Will be held in Tsukuba, Japan, in July (the second week?). • A Japanese experts meeting first followed by the international meeting (as interim meeting) • Semi ‐ closed; if anybody would like to attend or need information, please contact us . Venue: University of Tsukuba About 1 h from Tokyo by train About 1.5 h from Narita Airport by bus Tokyo
Sub ‐ group: Arid, sub tropical, tropical Environments Objectives 1. To contribute to improving current data of Tecdoc 1616 and TRS 472 for transfer parameters of radionuclides to plant and animal products in these climates 2. To compare transfer parameters with temperate values. Climates are defined according to Köppen ‐ Geiger classification A ‐ Tropical Moist Climates: all months have average temperatures above 18 ° Celsius. B ‐ Dry Climates: with deficient precipitation during most of the year. C ‐ Moist Mid ‐ latitude Climates with Mild Winters. D ‐ Moist Mid ‐ Latitude Climates with Cold Winters. E ‐ Polar Climates: with extremely cold winters and summers.
Activities will Activities ill co comp mprise: • re ‐ analysing the underlying original datasets of TRS 472 and Tecdoc 1616, revisiting the FAO/IAEA report on transfer factors coordinated by Frissel & the IUR transfer factors databank by Mitchell • including newly published or available information such as Lukashenko PhD thesis on Kazakhstan, PhD student work from Nigeria and South Africa, • Data provided by MODARIA II members (Egypt, Algeria, Australia, Mongolia). Others? • Requesting access to information from China, the USA and the database created during the TC RAF 7015/7016 project. • Other relevant national, TC and CRP data
MODARI MOD RIA II II ‐ Wo Working Gr Group oup 4 Sub Sub ‐ gr group oup Arid Arid En Envir vironm nmen ents ts • Interim meeting ‐ March/April 2017 in Athens hosted by N.C.S. R. Demokritos. • Anticipated outputs of the subgroup are: • Tecdoc on Radioecology in non ‐ temperate Environments, • Special issue of JER • The subgroup will cooperate with an IUR Task Force collating available information in arid areas in Europe, Asia and Africa and Americas. An official cooperation agreement of IAEA and the IUR has been agreed. • The subgroup will collaborate regarding relevant data in WG 5.
Thanks to • Marcelle Phaneuf, SS MODARIA on report • Sergey Fesenko, SS MODARIA II
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