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Department Radiation Protection

Implications of the new Radiation Protection Law

The Radiation Protection Register (SSR) number

The new Radiation Protection Act (StrlSchG) is based on the basic Euratom radiation protection standards laid down in DIRECTIVE 2013/59/EURATOM and entered into force on 01.01.2019.

In order to be able to clearly associate entries, the Federal Office for Radiation Protection (BfS) assigns a personal identification number for each person to be registered, the so-called radiation protection register (SSR) number. The respective home institution/company must apply online at BfS for the SSR numbers for its employees (the applicant is usually the radiation protection officer or the human resources department).

All guests, users or employees of external companies who want to work in the BESSY II (or MLS, HoBiCaT, bERLinPro) experiment hall require an SSR number and the corresponding certificate (pdf, issued by BfS) at the latest at the start of work. In case of German radiation passports, the SSR number must be entered together with the company number on page 3.

Further information can be found on the corresponding pages of the BfS. The overview page of the new Radiation Protection Ordinance (StrlSchV) is also worth reading.


Starting 01.07.2019, there will be no dosimeter and no access to the BESSY II experimental hall without SSR number!