INTERNATIONAL COMMISSION ON RADIOLOGICAL PROTECTIONICRP ref: 4840-6260-2158 REV1ICRP Committee 4 Meeting
November 18-24, 2019 – Adelaide, Australia
ICRP Committee 4 (C4) met in conjunction with the 5th ICRP Symposium andcovered several issues.
Existing exposure situations: C4 discussed how the comments received forPublication 142 on Radiological Protection from NORM in Industrial Processes(ex-TG76) were addressed. Its publication is expected at the end of 2019. The
committee also reviewed the report of TG98 on Exposures arising fromContaminated Sites and provided advice to progress the draft.
Topical applications reports: C4 reviewed the report of TG97 on Surface andNear-Surface Waste Disposal where development is continuing in close
coordination with critical reviewers. The Committee discussed TG106 on Mobile
Sources, and the connection of this topic with radiation safety culture and accidents.
C4 also discussed the initiation of work of TG 115 on RP in Space Travel, which isfollowed by a corresponding C4 WP.
Response to Fukushima: C4 discussed the main comments received (>300) on thedraft report of TG93 on Protection in the Event of a Nuclear Accident and how
these comments can be addressed. A key issue is the reference level, and it’s use
at different points in the emergency and long-term situation. C4 also decided topropose a new TG updating Publication 96 with a broader scope covering RP forradiation emergencies and malicious events.
Environmental protection: Information was provided about the final report of TG72
on Biota Radiation Weighting Factors for Reference Animals and Plants, which
publication is expected in the next months. C4 discussed the on-going work of
TG105 on Considering the Environment when Applying the System ofRadiological Protection. Its report will propose a way for the integration of theprotection of humans and non-human species in the ICRP system, by using casestudies in the different exposure situations. C4 also reviewed, jointly with C1, thework of TG99 on Reference Animals and Plants (RAPs), including the changes
related to RAPs and DCRLs.
Foundations and fundamentals: C4 discussed the General Plan for the Reviewof the ICRP System. In that perspective, C4 discussed jointly with C3 the Mappingof ICRP Annals, with the purpose to identify Publications still valid, obsolete or
needing an update, as well as the gaps and the new concepts to be integrated in thefuture General Recommendations. C4 also contributed to an effort to update theICRP Research Priorities and discussed the programme of work of TG114 on
Reasonableness and Tolerability in the System of RP. The C4 contribution to theICRP Glossary is almost complete.
Interaction with other Committees: C4 met with C1 and discussed TG91 on
DDREF and TG102 on Detriment Calculation as well as the issue of environment(see above). C4 also discussed the work plan of WP on RP in Space Travel inwww.icrp.org

INTERNATIONAL COMMISSION ON RADIOLOGICAL PROTECTION
relation to the newly established C1 TG on Risk and Dose Assessment forRadiological Protection of Astronauts (TG115). With C3, C4 discussed the ongoing work of TG109 on Ethics in RP for Medical Diagnosis and Treatment,
which purpose is to explicit the link between ethical values in RP and in medicine, as
well as of TG110 on RP in Veterinary Practices, which now cover the protection ofprofessionals, the public and animals as patients. C3 and C4 also considered thepossibility to create a new TG on production of radio-phamaceuticals. Finally,
information was provided to C4 about the report of C2 TG79 on Effective Dose,
which has been approved for publication.

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