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The Metrology Laboratory of Ionising Radiation (LMRI) is a Primary Laboratory of the National Primary System, under a Protocol between the Nuclear and Technological Campus (CTN) and the Portuguese Institute for Quality (IPQ).

Activity areas are this Group:

  • Scientific Metrology: Research in Metrology and Dosimetry. Design and construction of ionizing radiation quantities standards. Calibrations.
  • Maintenance and traceability of the National Standards.
  • Legal metrology: Metrologic control of ionizing radiation quantities instruments, as metrological control office.
  • Education and Training in Metrology and Dosimetry.

The LMRI has implemented a Quality System (QS) according to the standard NP EN ISO/IEC 17025:2005.


The LMRI is an infrastructure under the the Laboratory of Protection and Radiological Safety (LPSR) of the Nuclear Technological Campus (CTN).

See the graphic below for information of LMRI's functional structure:

Chart of the structure of LMRIR.

1. Main Activities

1.1. Research

In the research area, the Metrology Laboratory of Ionising Radiation and Radioactivity (LMRIR) studies the development of new methodologies and techniques in metrology and dosimetry, as well the development of standards and instrumentation for the measurement of the ionizing radiation quantities. For accomplish this, the LMRIR uses both the experimental methods and the computational simulation through Monte Carlo method.

Monte Carlo simulation method.
Legend: Monte Carlo simulation method and Ionization chamber developed in the LMRIR.

Irradiation of samples from other ITN Research Groups.

The LMRI, besides the internal laboratory activities, is open to collaborate and to satisfy the needs of other research groups, from CTN and outsiders.

For this, the LMRI offers irradiation conditions and dosimetry in the quantities and radiation qualities that exist in the laboratory.

Legend: Irradiation of samples from other CTN Research Groups.

1.2. Standards

Maintenance of the National Standards.

1.3. Training

Concerning the training activities, the LMRI participates in training actions enclosed in professional formation courses, in the field of the ionizing radiations. The LMRI is also interested in receiving undergraduate or graduate students who intend to do work in the field of ionizing radiation applications.Students during "Ciência-Viva" programmes.

The LMRI also participates in the "Ciência-Viva's" Programme, receiving students from the secondary school to do some laboratorial activities in the laboratory, for 15 days maximum (during summer holiday).

O LMRI offers its infrastructures and equipment to research activities (graduation and post-graduation grantees), in collaboration with Universities, on the scope of its normal activities. Working areas available:

  • Instrumentation and Automation: namely data acquisition, processing and  storage using LabView software;
  • Radiological Protection: to build an ionizing chamber to measure Hp(10),  studies using Monte-Carlo method.

Legend: Students during "Ciência-Viva" programmes.

2. Technical Services

The Metrology Laboratory of Ionising Radiation and Radioactivity (LMRI) provides services of metrological control for several activity areas such as Industry, Health, Research and Armed Forces, namely in the calibration and metrological verification of ionizing radiation measuring instruments.

2.1. See list of services

2.2. General Conditions

  1. The periodicity of the metrological control of the instruments of measure of the ionizing radiation is published in a Portuguese official document (Portaria nº 1106/2009, Diário da República nº 186, I Série-B, 24th September 2009).
  2. The laboratory only accepts written requests by letter, fax or e-mail, and if possible through the LMRIR calibration request form.
  3. The services costs are described in the internal document (LMRI_RQ_007).
  4. When the request form is received, it is analyzed and the client contacted for better explanation in case of need.
  5. Then, LMRI provides a work execution proposal (IM020), which the client must accept.
  6. The contract is assumed after confirmation from the client of acceptance of the calibration conditions.
  7. The client is informed of any change in the terms of the contract.
  8. The equipment transportation is responsibility of the client.
  9. The clients who express interest in assisting the experimental calibration procedure in the LMRI facilities must have to respect the security rules of LMRI.
  10. The laboratory is not responsible for any damage in the equipment which occurs during the calibration/verification pocedures.
  11. The functioning timetable of LMRI is from 9:00 to 12:00 and from 14:00 to 17:00.

2.3. Who to contact?

3. Equipment and Infrastructures

The Metrology Laboratory of Ionising Radiation includes:

  • Irradiation Room I;
  • Irradiation Room II;
  • Irradiation Room III;
  • Control room.

To see equipment available, follow this link: laboratory map.

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