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 4034 - RADIATION SAFETY REQUIREMENTS FOR INDUSTRIAL RADIOGRAPHIC OPERATIONS
Section He-P 4034.20 - Personnel Monitoring

Universal Citation: NH Admin Rules He-P 4034.20

Current through Register No. 40, October 3, 2024

(a) The licensee or registrant shall not permit any individual to act as a radiographer or a radiographer's assistant unless, at all times during radiographic operations, each individual wears, on the trunk of the body, a combination of direct reading dosimeter, an alarming ratemeter, and a personnel dosimeter that is processed and evaluated by an accredited National Voluntary Laboratory Accreditation Program (NVLAP) processor.

(b) At permanent radiography installations where alarming or warning devices are in routine use, or during radiographic operations using radiation machines, the wearing of an alarming ratemeter is not required.

(1) Have a range from zero to 2 millisieverts (200 mrem); and

(2) Be recharged at the start of each shift.

(d) Electronic personal dosimeters shall only be used in place of ion-chamber pocket dosimeters.

(e) Each personnel dosimeter shall be assigned to and worn by only one individual.

(f) Film badges shall be exchanged at periods not to exceed one month and other personnel dosimeters processed and evaluated by an accredited NVLAP processor shall be replaced at periods not to exceed three months.

(g) After replacement, each personnel dosimeter shall be processed as soon as practicable.

(h) Direct reading dosimeters, such as pocket dosimeters or electronic personal dosimeters, shall:

(1) Be read at the beginning and end of each shift;

(2) Have the exposures recorded at the beginning and end of each shift; and

(3) Be recorded in records maintained in accordance with He-P 4034.34.

(i) Pocket dosimeters, or electronic personal dosimeters, shall be checked at periods not to exceed 12 months in order to verify that readings are within plus or minus 20 percent of the true radiation exposure.

(j) Records resulting from the check of pocket dosimeters or electronic personal dosimeters shall be maintained in accordance with He-P 4034.34.

(k) If an individual's pocket dosimeter is found to be off-scale, or the electronic personal dosimeter reads greater than 2 millisieverts (200 mrem) and the possibility of radiation exposure cannot be ruled out as the cause:

(1) The individual's personnel dosimeter shall be sent for processing within 24 hours;

(2) The individual shall not resume work associated with the use of licensed material or sources of radiation until a determination of the individual's radiation exposure has been made by the RSO or the RSO's designee; and

(3) The results of this determination shall be included in the records maintained in accordance with He-P 4034.34.

(l) If the personnel dosimeter that is required by He-P 4034.20(a) is lost or damaged, the worker shall cease work immediately until a replacement personnel dosimeter is provided and the exposure is calculated for the time period from issuance to loss or damage of the personnel dosimeter.

(m) The results of the calculated exposure required in He-P 4034.20(1) and the time period for which the personnel dosimeter was lost or damaged shall be included in the records maintained in accordance with He-P 4034.34.

(n) Reports received from the accredited NVLAP personnel dosimeter processor shall be retained in accordance with He-P 4034.34.

(o) Each alarming ratemeter shall:

(1) Be checked to ensure that the alarm functions properly before using at the start of each shift;

(2) Be set to give an alarm signal at a preset dose rate of 5 millisieverts per hour (500 mrem/hr), with an accuracy of plus or minus 20 percent of the true radiation dose rate;

(3) Require special means to change the preset alarm function;

(4) Be calibrated at periods not to exceed 12 months for correct response to radiation; and

(5) Have the records of alarm ratemeter calibrations maintained by the licensee in accordance with He-P 4034.34.

(See Revision Note at part heading for He-P 4034) #6942, eff 2-1-99; ss by #8800, INTERIM, eff 2-1-07, EXPIRED: 7-31-07

New. #8959, eff 8-7-07

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