A. Short Test: (as stated by NUREG 8.4) The change in reading of a “zeroed” dosimeter caused by shorting the charging electrode to the barrel of the dosimeter shall be assessed. The change observed shall not exceed 5 percent of full scale. Results of testing shall be reported as either PASS or FAIL B. Charge Leak (Drift) Test: The discharge of the dosimeter in the absence of a radiation environment above background shall be measured. a. For 5R, 10R, 20R, 100R style Dosimeters – set to a temperature of 40°C for 48 hours. The dosimeter can have a drift of no more than +/- 5% when the device is allowed to cool to 18 to 22 C (or the temperature at which the device was initially zeroed). Results of testing shall be reported as either PASS or Fail. b. For 200mR, 500mR, style Dosimeters – set to a temperature of 30°C for 48 hours. The dosimeter can have a drift of no more than +/- 5% when the device is allowed to cool to 18 to 22 C (or the temperature at which the device was initially zeroed). Results of testing shall be reported as either PASS or Fail. c. Mid-Scale Accuracy Test: Following irradiation (Cs-137 source) to half scale reading, verification should be within +/- 20% of the CTV (conventionally true value) exposure as measured by an NIST traceable electrometer/ion chamber. The expected and observed exposure shall be reported. d. Dosimeters that FAIL testing shall be clearly labeled and bagged separately from devices meeting the operational standards specified above when they are returned. C. Fiber alignment to scale markings — The image of the fiber should appear as a line parallel to the scale markings within one-fourth of a minor scale division over the entire scale; that is, with the charging potential adjusted so that the image of the fiber coincides with the bottom of any major scale division marking, the distance between the image of the fiber and the top of that same major division marking should not be greater than one-fourth the distance between two adjacent minor division markings.
