Task Group 99
Reference Animal and Plant (RAP) Monographs

A Task Group under Committee 1 and Committee 4

(The Terms of Reference of this Task Group were revised in January 2022)


Initiated under the auspices of the former Committee 5, TG99 was developed from 2017 as a joint task group between Committee 1 and Committee 4, dealing with improvements in the field of radiological protection of the environment.

As originally defined, the goal of this TG is to review and update data and methods to improve the use and practicality of the ICRP Reference Animals and Plants (RAPs) when applying the system of radiological protection of the environment in planned, emergency and existing exposure situations.


  • A methodological report to describe methods used for meta-analysis and data sources (type and quality) for applying these methods to fauna and flora. (NB: The TG agreed that veterinary patients’ issues are out of scope of this report, even though a number of data will surely be useful for tackling this issue). This report will describe the statistical method for deriving Derived Consideration Reference Levels (DCRLs) values for the three exposure situations (planned, emergency and existing), advise on how to implement the method, and discuss the comparison of the outcomes with existing DCRLs.
  • A series of electronic annexes (excel files), one per wildlife group, where all the data used in the document will be made available in a stand-alone manner. The update will comprise the initial 12 RAPs as well as existing data on other non-RAP species supporting the effect data meta-analysis to derive DCRLs at a taxonomic level higher than the family, i.e. the class level. (e.g. data on rat and deer (2 of the current RAPs) will be updated and compile with all other data on mammals).

Evolution of the initial scope

The initial scope of the update of RAP-related data covered dosimetry, transfers and effects, with all relevant knowledge organised in a meaningful manner across the three main components of risk assessment: transfers and dosimetry, effects and risk characterization.

Since the TG99 began its work, two ICRP publications have been issued on dosimetry (Publication 136 and Publication 148) and the IAEA will issue in 2022 an update of Safety Report Series No. 19 “Generic models for use in assessing the impact of discharges of radioactive substances to the environment” (SRS 19). The latter will contain updated data for wildlife dose assessments (i.e. radionuclide transfers and dosimetry with a comprehensive set of modelling methods).

This new situation calls for a thorough revision of the TG99’s plan to avoid unnecessary overlap between different initiatives, and harmonized leveraging of outcomes. Additionally, a closer collaboration with TG105 would be more appropriate and timely, as TG105 is also revising its initial plan of work. Moreover, the ongoing work of some C4 TGs needs coordination and harmonisation with TG99’s outcomes as these TGs address the application of the Commission’s recommendations on protection of the environment, as a core topic (TG105) or as a cross-cutting issue (TG98, TG114).

After C1 and C4 internal discussions, the revised ToR focuses the deliverable on improving the representativeness of Reference Animals and Plants (RAPs) and the methods and underlying effects data for the derivation of Derived Consideration Reference Levels for animals and plants in planned, emergency and existing exposure situations.

It is intended that the planned chapters on transfers and dosimetry for RAPs be reduced to a minimum of information, referring mainly to the IAEA publication and related databases.

Jacqueline Garnier-Laplace (Chair), OECD Nuclear Energy Agency (NEA), France
Christelle Adam-Guillermin (Co-Chair), IRSN, France
Claire Cailes (Member), Environment Agency, United Kingdom
Frederic Alonzo (Member), French Institute for Radiological Protection and Nuclear Safety (IRSN), France
Karine Beaugelin-Seiller (Member), Institut de Radioprotection et de Sret Nuclaire (IRSN), France
Nick Beresford (Member), UK Centre for Ecology & Hydrology, United Kingdom
Justin Brown (Member), Norwegian Radiation and Nuclear Safety Authority (DSA), Norway
David Copplestone (Member), University of Stirling, United Kingdom
Kathryn A Higley (Member), Oregon State University, USA
Carl-Magnus Larsson (Member), Australian Radiation Protection and Nuclear Safety Agency (ARPANSA), Australia
Almudena Real (Member), CIEMAT, Spain
Per Strand (Member), Norwegian Radiation and Nuclear Safety Authority (DSA), Norway
Keiko Tagami (Member), National Institutes for Quantum Scienc and Technology, Japan
Claire Della Vedova (Member), French Institute for Radiological Protection and Nuclear Safety (IRSN), France
Jordi Vives Batlle (Member), Belgian Nuclear Research Centre (SCK CEN), Belgium
Tamara Yankovich (Member), International Atomic Energy Agency, Austria
Katherine Raines (Member-Mentee), United Kingdom