Last update : August 4, 2020 National competent authoritiesNational competent authorities: The national competent authority is Radiation and Nuclear Safety Authority (STUK). http://www.stuk.fi/web/en/ National legislative frameworkMain texts of the national regulation: The present national regulation is based on the Radiation Act (859/2018), Government Decree on ionizing radiation (1034/2018) and Decree of the Ministry of Social Affairs and Health on ionizing radiation (1044/2018). STUK issues more detailed regulations on the general dose constraints applicable to specific radiation practices and radiation sources and on limitations concerning potential exposure and their use as well as on demonstrating the implementation of the justification and the optimization of radiation protection. Provisions more stringent than the Directive EURATOM: No National dose registerNational body responsible of national statistics: Th Approved dosimetry servicesAirline companiesEmployer (or employee) Doses received in another country: YesOutside workers: When using outside workers the responsible party must ensure that monitoring of radiation exposure and medical surveillance have been arranged for these workers in accordance with sections 103 and 104 of the Radiation Act (859/2018). The employer of outside workers shall organize medical surveillance for category A workers. The responsible party must organize the individual monitoring of radiation exposure for an outside worker belonging in category A. The responsible party and the employer may agree in writing that the employer takes care of the individual monitoring and of the information´s delivery to the dose register. However, no parallel individual monitoring need be arranged for outside workers with personal dosemeters of their own. Radiation passbookWorkers with radiation passbook: Only specific group of workersA worker leaving to perform radiation work abroad (at least in category A) needs the single use radiation passbook. The Finnish radiation passbook consist of a radiological monitoring document and a certificate from the occupational physician familiar with radiation. In Finland, doses for Finnish outside workers are obtained from the national dose register and radiation passbook is not needed. Radiation passbook centralisation: YesThe radiological monitoring documents (part of radiation passbook) are obtained from STUK. Approved dosimetry servicesApproval of dosimetry services: Individual monitoring of doses sustained by workers must be based on individual dose measurements or other individual dose determinations performed by an approved dosimetry service. The Guide ST 1.9 presents the principal requirements on accuracy of radiation measurements and on the approval, calibration and operating condition inspections of radiation meters, together with requirements for dosimetry services measuring the individual radiation doses of workers engaged in radiation work (approved dosimetry services). STUK approves dosimetry services. Airline companies are treated like approved dosimetry services. The Guide ST 12.4 presents the requirements governing radiation safety of aircrews exposed to cosmic radiation and the monitoring of their exposure. Approved dosimetry services: External radiation exposure: There are a few approved dosimetry services in Finland: commercial services and nuclear power plants have their own services. Individual monitoring services: - Intercomparison measurement programs: YesWhen possible the dosimetry service must also participate in international comparisons of measurement. External exposureReference dosimetry: Passive dosimetryCategory B workers: YesPositioning of the dosemeter: Above the lead apronPassive dosimetry - Radiation background: Determining the background radiation depends on the approved dosimetry service. Normally the background radiation is defined withing the first measurement period when starting the monitoring and when needed, but in addition every third year. Duration of the monitoring: max 1 month category A workers, max 3 months category B workers Description of the personal whole body dosemetersWhole body dosimetry: TLDRPLOSLSSNTDBubbledetectorsOthers(precise which one)Recording level(mSv) Photon or photon/electronHp(10)YNYNN0.10 per month Photon or photon/electronHp(0.07)YNYNN1.00 per month NeutronHp(10)YNNNN0.20 per month Description of the personal extremity dosemeters (ring)Extremity dosemeter (ring): TLDOthers(precise which one)Recording level(mSv) Photon/electronHp(0.07)Y1.00 per month Description of the personal extremity dosemeters (wrist)Extremity dosemeter (wrist): TLDOthers(precise which one)Recording level(mSv) Photon/electronHp(0.07)N PhotonHp(10)N NeutronHp(0.07), Hp(10)N Description of the lens dosemetersLens dosemeter: TLDOthers(precise which one)Recording level(mSv) Photon/electronHp(0.07), Hp(3), Hp(10)N Aircrew exposureAircrew monitoring: Parties engaged in aviation operations must investigate if there is any cause to suspect, that the annual effective dose of an individual worker may exceed 1 mSv. In practice, this applies to all parties engaged in aviation operations at altitudes of more than 8000 metres. The responsible party must implement the radiation protection of aircrews in accordance with the requirements presented in Guide ST 12.4. An appropriate calculation programme of proven reliability must be used for determining exposure to cosmic radiation. Reliability may be demonstrated, for example, by means of international comparisons. The calculation programme must: be suitable for determining cosmic radiation doses be documented and tested yield results in the form of effective dose or ambient dose equivalent (see Appendix C and Guides ST 1.9 and ST 7.2) be sufficiently accurate: at a confidence level of 95 %, the result must not deviate by more than 33 % below or 50% above the proper value. Examples of calculation programmes of proven reliability are CARI, EPCARD and FREE. Aircrew dose are calculated by airline co Internal exposure monitoringIn vivo measurements: - Radiotoxicological analysis: - Internal commited dose assessment: - Recording level for internal commited dose: - Radon exposureMonitoring radon exposure: Radon measurement methods are approved by STUK. The requirements for the measurement method is represented in Guide ST 1.9. A list of the approved radon measurement methods (in Finnish) is in STUK's website.
