Research and analysis

Generalised derived constraints for 4 radioisotopes

Documents of the NRPB volume 13 number 2 contains generalised derived constraints for radioisotopes of polonium, lead, radium and uranium.

• From: Public Health England
• Published: 15 July 2002

Documents

Documents of the NRPB volume 13 number 2: generalised derived constraints for radioisotopes of polonium, lead, radium and uranium

Ref: ISBN 0-85951-477-3

PDF, 1.56 MB, 42 pages

This file may not be suitable for users of assistive technology.

Request an accessible format.

If you use assistive technology (such as a screen reader) and need a version of this document in a more accessible format, please email [email protected]. Please tell us what format you need. It will help us if you say what assistive technology you use.

Details

The 1990 recommendations of the International Commission on Radiological Protection introduced the concept of the dose constraint. The concept of a generalised derived constraint (GDC) was introduced in the NRPB response to the recommendations.

GDCs apply to discharges of radionuclides to the environment and have been calculated for discharges to atmosphere, rivers and sewers for the radiologically significant isotopes of polonium, lead, radium and uranium. Those presented here are intended as convenient reference levels against which proposed discharges can be compared.

GDCs are calculated using deliberately cautious assumptions and in terms of annual discharges, assuming that the releases to the environment are continuous. If a proposed discharge is greater than about 30% of the GDC, the doses should be examined more closely, taking account of site-specific factors.

Published 15 July 2002