Ionising radiation sector

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| Ionising radiation

temperatura

Accredited metrological sector

accredia lat104

Sector Manager: Marco Caresana

  Deputy manager: Ornella Tambussi
Telephone: +39.02.23996305
Email: 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

DOSIMETRY FOR ENVIRONMENTAL RADIO PROTECTION, RADIODIAGNOSTICS AND HIGH DOSES WITH MEDIUM-ENERGY X-RAY

Strumenti in taratura Measuring Conditions Measuring range1
Uncertainty 2
Method/Procedure3
Dosimetri per radioprotezione radiodagniostica e altre dosi
Rateo di Kerma in aria, Ka
Direct reading4
da 1,5 • 10-3 Gy/s a 1,5 • 10-8 Gy/s
2,0%

Free air irradiation with radiation specified in the table

"REFERENCE RADIATION"

UNI ISO 4037-1:2009

UNI ISO 4037-2:2009

UNIISO 4037-3:2009

CEI/IEC 61267:2005

da 1,5 • 10-8 Gy/s a 2,7 • 10-10 Gy/s 4,0%
Kerma in aria, Ka Direct or indirect reading4  (5)  (6)
Dosimetri per radioprotezione ambientale
  
Rateo di equivalente di dose ambientale H* 4
 
A lettura diretta4  da 1,8 • 10-3 Sv/s a 2,0 • 10-8 Sv/s  3,5%
da 1,5 • 10-3 Sv/s a 1,5 • 10-8 Sv/s   5,8%
 Equivalente di dose ambientale H* 4  A lettura diretta o indiretta4 (5)  (6) 
Tempi di consegna del certificato: 20 giorni lavorativi dall'esecuzione delle misure

DOSIMETRIA PER RADIOPROTEZIONE AMBIENTALE CON RADIAZIONE GAMMA

Strumenti in taratura Misurando Condizioni Campo di Misura1
Incertezza2
Metodo/Procedura3
Dosimetri per radioprotezione
Rateo di Kerma in aria, Ka
A lettura diretta4
da 5,5 • 10-6 Gy/s a 1,5 • 10-8 Gy/s
3,0%

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

da 1,5 • 10-8 Gy/s a 2,7 • 10-10 Gy/s 4,0%
Kerma in aria, Ka

A lettura diretta o indiretta4

 (5)  (6)
Dosimetri per radioprotezione   ambientale Rateo di equivalente di dose ambientale H* 10
 
A lettura diretta4 da 1,4 • 10-3 Sv/s a 2,0 • 10-8 Sv/s  5,0%
da 2,0 • 10-8 Sv/s a 3,3 • 10-10 Sv/s   5,8%
 Equivalente di dose ambientale H* 4  A lettura diretta o indiretta4 (5)  (6) 
Tempi di consegna del certificato: 20 giorni lavorativi dall'esecuzione delle misure

DOSIMETRIA PER RADIOPROTEZIONE PERSONALE

Strumenti in taratura Misurando Condizioni Campo di Misura1
Incertezza2
Metodo/Procedura3
Dosimetri per radioprotezione personale
Rateo di equivalente di dose personale superficiale Hp (o,o7)
A lettura diretta da 3,0 • 10-4 Sv/s a 2,0 • 10-8 Sv/s 5,0%

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 5,8%
Rateo di equivalente di dose personale al cristallino Hp (3) da 3,2 • 10-4 Sv/s a 2,0 • 10-8 Sv/s 5,0%
da 2,0 • 10-8 Sv/s a 3,3 • 10-10 Sv/s 5,8%
Rateo di dose personale superficiale Hp (10) da 1,2 • 10-4 Sv/s a 2,0 • 10-8 Sv/s 5,0%
da 2,0 • 10-8 Sv/s a 3,3 • 10-10 Sv/s 5,8%
 Rateo di equivalente di dose personale superficiale Hp (o,o7)    A lettura diretta o indiretta (5) (6)
 Rateo di equivalente di dose personale al cristallino Hp (3)
 Rateo di dose personale superficiale Hp (10)
Tempi di consegna del certificato: 20 giorni lavorativi dall'esecuzione delle misure
Notes:

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.

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.
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University Quality Service

Piazza Leonardo da Vinci, 32
20133 - Milano
Tel. +39. 02.2399.9253 - 9239
Building I - First Floor
VAT No. 04376620151
Tax Code 80057930150

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Piazza Leonardo da Vinci, 32
20133 - Milano
Tel +39. 02.23999300
Fax +39 02. 23999248
@ taratura@polimi.it