External links

This link takes you to a HSE database where you can search a list of appointed doctors, made under the Ionising Radiations Regulations 2017 (IRR17).

Atomic Archive says about itself: 'This site explores the complex history surrounding the invention of the atomic bomb - a crucial turning point for all mankind'. This site is a great read when you have a few hours to spare. It has resources dealing with the science, history, photos, videos and much more..

Atomic Insights LLC is a for-profit, tax-paying, publishing company based in Virginia and wholly owned by Rod Adams (Rod’s words). Ionactive (Mark Ramsay) has been following Rod Adams for many years. Topics include articles on atomic energy, radiation risk, energy and much more.

Calder is a leading supplier of lead sheet and lead engineered products in the UK and beyond. They supply lead radiation shielding products to the medical, industrial, nuclear and defense sectors.

D-values are used by the Environment Agency (EA), SEPA and the UK police advisers (CTSA) to determine the source category and appropriate security measures for sealed sources, where this cannot be assessed directly from the use/practice. D (Danger) values are in TBq, and the quotient A/D (where A is the activity of a source in TBq) are used to determine source category. In the UK some sources are already categorised for security and this will then take precedence over A/D. For those into dosimetry calculations and assessments behind D values, section 3 onwards explain in detail how the values are derived.