NAC459.365. Records of prior occupational doses.

     1. For each person who is likely to receive, in 1 year, an occupational dose requiring monitoring pursuant to NAC 459.339, the licensee or registrant shall:

     (a) Determine the occupational dose received by that person during the current year; and

     (b) Attempt to obtain the records of the lifetime cumulative occupational dose received by that person.

     2. Before permitting a person to participate in a planned special exposure, the licensee or registrant shall determine:

     (a) The internal and external doses received by that person from all previous planned special exposures;

     (b) All doses in excess of the limits, including, without limitation, doses received during accidents and emergencies, received during the lifetime of the person; and

     (c) All lifetime cumulative occupational doses.

     3. To comply with the requirements of subsection 1, a licensee or registrant may:

     (a) Accept, as a record of the occupational dose that the person received during the current year, a signed written statement from the person, or from his or her most recent employer for work involving exposure to radiation, that discloses the nature and the amount of any occupational dose that the person received during the current year.

     (b) Accept, as the record of the lifetime cumulative dose received by a person, a current form regarding history of cumulative occupational exposure, signed by the person and countersigned by:

          (1) An appropriate official of the most recent employer of the person for work involving exposure to radiation; or

          (2) The current employer of the person, if the person is not employed by the licensee or registrant.

     (c) Obtain reports regarding the dose equivalent of a person from his or her most recent employer for work involving exposure to radiation, or the current employer of the person if he or she is not employed by the licensee or registrant, by telephone, telegram, facsimile, electronic media or letter. The licensee or registrant shall request a written verification of the data if the authenticity of the transmitted report cannot be established.

     4. A licensee or registrant shall record the history of exposure of each person, as required by subsection 1, on a form regarding history of cumulative occupational exposure, and shall include all the information required by that form. The form must show each period in which the person received occupational exposure to radiation or radioactive material and must be signed by that person. For each period for which the licensee or registrant obtains a report, the licensee or registrant shall use the dose shown in the report in preparing the form regarding history of cumulative occupational exposure. For any period in which the licensee or registrant does not obtain a report, the licensee or registrant shall place a notation on the form regarding history of cumulative occupational exposure indicating the periods for which data is not available.

     5. Licensees and registrants are not required to reevaluate the separate dose equivalents received from sources of radiation outside the body and committed dose equivalents or intakes of radionuclides received from radioactive material taken into the body that are assessed before January 18, 1994. Histories of occupational exposure obtained and recorded on the form regarding history of cumulative occupational exposure before January 18, 1994, may be used in the absence of specific information regarding the intake of radionuclides by the person.

     6. If the licensee or registrant is unable to obtain a complete record of the current and previously accumulated occupational dose of a person, the licensee or registrant shall:

     (a) In establishing administrative controls pursuant to subsection 6 of NAC 459.325 for the current year, assume that the allowable limits for the person are reduced by 1.25 rems for each quarter for which records were unavailable and the person was engaged in activities that could have resulted in occupational exposure; and

     (b) Assume that the person is not available for planned special exposures.

     7. The licensee or registrant shall retain the records on the form regarding history of cumulative occupational exposure until the Division terminates each license or registration requiring the records. The licensee or registrant shall retain each record used in preparing the form regarding history of cumulative occupational exposure for at least 3 years after that record is made.

     (Added to NAC by Bd. of Health, eff. 1-18-94; A by R084-98, 1-26-99)