New Hampshire Code of Administrative Rules
He - Department of Health and Human Services
Subtitle He-P - Former Division of Public Health Services
Chapter He-P 4000 - NEW HAMPSHIRE RULES FOR THE CONTROL OF RADIATION
Part He-P 4047 - USE OF RADIATION MACHINES: THERAPEUTIC RADIATION MACHINES
Section He-P 4047.08 - Calibration of Survey Instruments

Universal Citation: NH Admin Rules He-P 4047.08

Current through Register No. 40, October 3, 2024

(a) The registrant shall ensure that the survey instruments used to show compliance with He-P 4047 have been calibrated as follows:

(1) Before the first use;

(2) At intervals not to exceed 12 months; and

(3) Following repair.

(b) To satisfy the requirements of He-P 4047.08(a) , the registrant shall:

(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); and

(2) Calibrate at least 2 points on each scale to be calibrated. These points shall be approximately 1/3 to 2/3 full-scale.

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

(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.

(d) The registrant shall retain a record of each calibration required in He-P 4047.08(a) for 3 years.

(e) The record required in He-P 4047.08(d) shall include:

(1) A description of the calibration procedure; and

(2) A description of:

a. The source used;

b. The certified dose rates from the source;

c. The rates indicated by the instrument being calibrated;

d. The correction factors deduced from the calibration data;

e. The signature of the individual who performed the calibration; and

f. The date of calibration.

(f) The registrant may obtain the services of individuals registered or licensed by DHHS/RHS, the U.S. Nuclear Regulatory Commission, an Agreement State, or a Licensing State to perform calibrations of survey instruments.

#6827, eff 8-6-98; ss by #8692, INTERIM, eff 7-27-06, EXPIRES: 2-2-07; ss by #8808, eff 1-24-07

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