Ionising Radiation sector

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| Ionising radiation

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Sector Manager: Luisella Garlati

Campus Bovisa

Via La Masa, 34

20156 - Milano

Telephon: 02.2399.6305

Mail: ornella.tambussi@polimi.it

The sector performs the calibration by comparison of dosimeters and rateometers for environmental/personal radiation protection and radio-diagnostics.

The calibration, depending on the instrument, is applied to the quantities (and related expenses):

  • Exposure
  • Air-Kerma
  • Ambient dose equivalent
  • Directional dose equivalent
  • Personal/shallow-dose equivalent
  • Personal deep-dose equivalent

folder my documents 15435

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DOSIMETRIA PER RADIOPROTEZIONE AMBIENTALE O MAMMOBRAGIA O ALTE DOSI CON RADIAZIONI X DI BASSA ENERGIA

Instruments in calibration

Measuring

Conditions

Measuring range1

Uncertainty2

Method/Procedure3

Dosimetri per radioprotezione, mammografia, alte dosi 3

Rateo di Kerma in aria ka

A lettura diretta

≥ 1,3 • 10-5 Gy/s

≤ 1,1 • 10-3 Gy/s

2,0%

Irraggiamento in aria libera con radiazioni X specificate nella tabella

"RADIAZIONI DI RIFERIMENTO"

CEI EN 61223-3-2:2008
       

Rateo di Kerma in aria ka

A lettura diretta o indiretta

(nota 4)

(nota 5)
  1. The limit values of the measuring range are nominal values, as they vary according to the radiation quality and the reference quantity used. The effective limit values are specified, for each radiation and reference quantity, in the "LIMITS OF THE MEASURING RANGE" tables below
  2. To determine the best level of uncertainty declared by the Laboratory, the value of the measurement uncertainty must be further combined with the additional uncertainty component u (Q), specified in the “REFERENCE RADIATION” table for each radiation quality.
  3. Included are ionisation chambers supplied by the Principal without an associated charge measurement system and connected to the Laboratory charge measurement system.
  4. Derived from the corresponding magnitude in rate by multiplying by an irradiation time between 30 s and 3600 s.
  5. The estimated uncertainty values are the same as those of the corresponding magnitudes in rate, as the uncertainty contribution associated with the measurement time is very small (<0.1%) compared to the total uncertainty and does not change its value.

Certificate delivery time: 20 working days from the execution of the measurements

DOSIMETRIA PER RADIOPROTEZIONE AMBIENTALE, RADIODIAGNOSTICA E ALTE DOSI CON RADIAZIONE X DI MEDIA ENERGIA

Instruments in calibration

Measuring

Conditions

Measuring range1

Uncertainty2

Method/Procedure3

Dosimetri per radioprotezione radiodagniostica e altre dosi

Rateo di Kerma in aria, Ka

A lettura diretta4

≥ 2,7 • 10-10 Gy/s 

≤ 1,5 • 10-8 Gy/s

4,0%

Irraggiamento in aria libera con radiazioni specificate nella tabella

"RADIAZIONI DI RIFERIMENTO"

UNI ISO 4037-1:2019

UNI ISO 4037-2:2019

UNIISO 4037-3:2019

CEI/IEC 61267:2006

> 1,5 • 10-8 Gy/s

≤ 1,5 • 10-3 Gy/s

2,0%

Kerma in aria, Ka

A lettura diretta o indiretta4

 (nota 5)

 (nota 6)

Dosimetri per radioprotezione ambientale

Rateo di equivalente di dose ambientale H* (10)

A lettura diretta4 

≥ 3,3 • 10-10 Gy/s 

≤ 2,0 • 10-8 Gy/s

7,0%

 > 2,0 • 10-8 Gy/s

≤ 1,8 • 10-3 Gy/s

6,0%

 Equivalente di dose ambientale H* (10)

 A lettura diretta o indiretta4

(nota 5)

(noa 6)
  1. The limit values of the measuring range are nominal values, as they vary according to the radiation quality and the reference quantity used. The effective limit values are specified, for each radiation and reference quantity, in the "LIMITS OF THE MEASURING RANGE" tables below.
  2. To determine the best level of uncertainty declared by the Laboratory, the value of the measurement uncertainty must be further combined with the additional uncertainty component u (Q), specified in the “REFERENCE RADIATION” table for each radiation quality.
  3. The general exposure procedure applies both to the calibration of direct reading instruments and to the irradiation of indirect reading instruments.
  4. Included are ionisation chambers supplied by the Principal without an associated charge measurement system and connected to the Laboratory charge measurement system.
  5. Derived from the corresponding magnitude in rate by multiplying by an irradiation time between 30 s and 3600 s.
  6. The estimated uncertainty values are the same as those of the corresponding magnitudes in rate, as the uncertainty contribution associated with the measurement time is very small (<0.1%) compared to the total uncertainty and does not change its value.

Certificate delivery time: 20 working days from the execution of the measurements

DOSIMETRIA PER RADIOPROTEZIONE AMBIENTALE CON RADIAZIONE GAMMA

Instruments in calibration

Measuring

Conditions

Measuring range1

Uncertainty2

Method/Procedure3

Dosimetri per radioprotezione

Rateo di Kerma in aria, Ka

A lettura diretta4

≥ 2,7 • 10-10 Gy/s

≤ 1,5 • 10-8 Gy/s

4,0%

Irraggiamento in aria libera con radiazioni specificate nella tabella

"RADIAZIONI DI RIFERIMENTO"

UNI ISO 4037-1:2009

UNI ISO 4037-2:2009

UNIISO 4037-3:2009

CEI/IEC 61267:2005

> 1,5 • 10-8 Gy/s

≤ 5,5 • 10-6 Gy/s

3,0%

Kerma in aria, Ka

A lettura diretta o indiretta4

 (nota 5)

 (nota 6)

Dosimetri per radioprotezione ambientale

Rateo di equivalente di dose ambientale H* (10)
 

A lettura diretta4

≥ 3,3 • 10-10 Sv/s 

≤ 2,0 • 10-8 Sv/s 

7,0%

> 2,0 • 10-8 Sv/s

≤ 5,1 • 10-6 Sv/s. 

6,0%

 Equivalente di dose ambientale H* (10)

 A lettura diretta o indiretta4

(nota 5)

(nota 6) 
  1. The limit values of the measuring range are nominal values, as they vary according to the radiation quality and the reference quantity used. The effective limit values are specified, for each radiation and reference quantity, in the "LIMITS OF THE MEASURING RANGE" tables below.
  2. To determine the best level of uncertainty declared by the Laboratory, the value of the measurement uncertainty must be further combined with the additional uncertainty component u (Q), specified in the “REFERENCE RADIATION” table for each radiation quality.
  3. The general exposure procedure applies both to the calibration of direct reading instruments and to the irradiation of indirect reading instruments.
  4. Included are ionisation chambers supplied by the Principal without an associated charge measurement system and connected to the Laboratory charge measurement system.
  5. Derived from the corresponding magnitude in rate by multiplying by an irradiation time between 30 s and 3600 s.
  6. The estimated uncertainty values are the same as those of the corresponding magnitudes in rate, as the uncertainty contribution associated with the measurement time is very small (<0.1%) compared to the total uncertainty and does not change its value.

 

Certificate delivery time: 20 working days from the execution of the measurements

DOSIMETRIA PER RADIOPROTEZIONE PERSONALE

Instruments in calibration

Measuring

Conditions

Measuring range1

Uncertainty2

Method/Procedure3

Dosimetri per radioprotezione personale

Rateo di equivalente di dose personale superficiale Hp 0,07)

A lettura diretta4

da 3,0 • 10-4 Sv/s a 2,0 • 10-8 Sv/s

6,0%

Irraggiamento in aria libera con radiazioni specificate nella tabella

"RADIAZIONI DI RIFERIMENTO"

UNI ISO 4037-1:2009

UNI ISO 4037-2:2009

UNIISO 4037-3:2009

da 2,0 • 10-8 Sv/s a 3,3 • 10-10 Sv/s 

7,0%

Rateo di equivalente di dose personale al cristallino Hp (3)

da 3,2 • 10-4 Sv/s a 2,0 • 10-8 Sv/s 

6,0%

da 2,0 • 10-8 Sv/s a 3,3 • 10-10 Sv/s  

7,0%

Rateo di dose personale superficiale Hp (10) 

da 1,2 • 10-4 Sv/s a 2,0 • 10-8 Sv/s 

6,0%

da 2,0 • 10-8 Sv/s a 3,3 • 10-10 Sv/s  

7,0%

 Rateo di equivalente di dose personale superficiale Hp (0,07)

   A lettura diretta o indiretta4

(nota 5)

(nota 6)

 Rateo di equivalente di dose personale al cristallino Hp (3)

 Rateo di dose personale superficiale Hp (10) 
  1. The limit values of the measuring range are nominal values, as they vary according to the radiation quality and the reference quantity used. The effective limit values are specified, for each radiation and reference quantity, in the "LIMITS OF THE MEASURING RANGE" tables below.
  2. To determine the best level of uncertainty declared by the Laboratory, the value of the measurement uncertainty must be further combined with the additional uncertainty component u (Q), specified in the “REFERENCE RADIATION” table for each radiation quality.
  3. The general exposure procedure applies both to the calibration of direct reading instruments and to the irradiation of indirect reading instruments.
  4. Included are ionisation chambers supplied by the Principal without an associated charge measurement system and connected to the Laboratory charge measurement system.
  5. Derived from the corresponding magnitude in rate by multiplying by an irradiation time between 30 s and 3600 s.
  6. The estimated uncertainty values are the same as those of the corresponding magnitudes in rate, as the uncertainty contribution associated with the measurement time is very small (<0.1%) compared to the total uncertainty and does not change its value.

Certificate delivery time: 20 working days from the execution of the measurements

Reference radiation:

Filtered X radiation

Gamma radiation

Limits of the measuring range

Calibrations are carried out by appointment, possibly in the presence of the applicant. The sample is returned to the owner at the end of the calibration. The Principal attends only as an observer. If the Principal intends to make adjustments to the instrument, these can only be made at the end of calibration. The Principal can request a new calibration. The cost of the service will be the one envisaged for the subsequent calibration points. If it is not possible to proceed with the calibration due to malfunctioning of the instrument, the certificate will not be issued, the customer will be informed of the problem encountered and an invoice will be issued as a lump sum payment for the work performed. If the instrument arrives without batteries or with flat batteries, the calibration will be carried out by replacing them with batteries in our possession which, at the end of the calibration, will be retained by the laboratory; an extra charge for this will be applied to the cost of calibration.