16 Del. Admin. Code § 4465-X-8.0

Current through Register Vol. 28, No. 7, January 1, 2025

Section 4465-X-8.0 - Calibration of Survey Instruments

8.1 The registrant shall ensure that the survey instruments used to show compliance with 4492 (Part X) have been calibrated before first use, at intervals not to exceed twelve (12) months, and following repair. The registrant shall check each survey instrument for consistent response with a dedicated check source before each use. The licensee is not required to keep records of these checks.

8.2 To satisfy the requirements of 8.1 the registrant shall:

8.2.1 Calibrate all required scale readings up to 10 mSv (1000 mrem) per hour with an appropriate radiation source that is traceable to the National Institute of Standards and Technology (NIST);

8.2.2 Calibrate at least two (2) points on each scale to be calibrated. These points should be at approximately 1/3 and 2/3 of full-scale; and

8.3 To satisfy the requirements of 8.2 the registrant shall:

8.3.1 Consider a point as calibrated if the indicated dose rate differs from the calculated dose rate by not more than 10 percent; and

8.3.2 Consider a point as calibrated if the indicated dose rate differs from the calculated dose rate by not more than 20 percent if a correction factor or graph is conspicuously attached to the instrument.

8.4 The registrant shall retain a record of each calibration required in 8.1 for three (3) years. The record shall include:

8.4.1 A description of the calibration procedure; and

8.4.2 A description of the source used and the certified dose rates from the source, and the rates indicated by the instrument being calibrated, the correction factors deduced from the calibration data, the signature of the individual who performed the calibration, and the date of calibration.

8.5 The registrant may obtain the services of individuals licensed by the Agency, the US Nuclear Regulatory Commission or an Agreement State to perform calibrations of survey instruments. Records of calibrations that contain information required by 8.4 shall be maintained by the registrant.

16 Del. Admin. Code § 4465-X-8.0

16 DE Reg. 1274 (6/1/2013)
22 DE Reg. 401 (11/1/2018) (Final)