La. Admin. Code tit. 33 § XV-414

Current through Register Vol. 50, No. 9, September 20, 2024

Section XV-414 - Determination of Prior Occupational Dose

A. For each individual who is likely to receive, in a year, an occupational dose requiring monitoring in accordance with LAC 33:XV.431, the licensee or registrant shall:

1. determine the occupational radiation dose received during the current year; and

2. attempt to obtain the records of lifetime cumulative occupational radiation dose.

B. Prior to permitting an individual to participate in a planned special exposure, the licensee or registrant shall determine:

1. the internal and external doses from all previous planned special exposures; and

2. all doses in excess of the limits, including doses received during accidents and emergencies, received during the lifetime of the individual.

C. In complying with the requirements of LAC 33:XV.414.A, a licensee or registrant may:

1. accept, as a record of the occupational dose that the individual received during the current year, a written signed statement from the individual, or from the individual's most recent employer for work involving radiation exposure, that discloses the nature and the amount of any occupational dose that the individual received during the current year;

2. accept, as the record of lifetime cumulative radiation dose, an up-to-date department Form DRC-4 or equivalent, signed by the individual and countersigned by an appropriate official of the most recent employer for work involving radiation exposure or the individual's current employer, if the individual is not employed by the licensee or registrant; and

3. obtain reports of the individual's dose equivalent from the most recent employer for work involving radiation exposure or the individual's current employer, if the individual is not employed by the licensee or registrant, by telephone, telegram, facsimile, or letter. The licensee or registrant shall request a written verification of the dose data if the authenticity of the transmitted report cannot be established.

D. The licensee or registrant shall record the exposure history, as required by LAC 33:XV.414.A, on department Form DRC-4, or other clear and legible record, of all the information required on that form. The form or record shall show each period in which the individual received occupational exposure to radiation or radioactive material and shall be signed by the individual who received the exposure. For each period for which the licensee or registrant obtains reports, the licensee or registrant shall use the dose shown in the report in preparing department Form DRC-4 or equivalent. For any period in which the licensee or registrant does not obtain a report, the licensee or registrant shall place a notation on department Form DRC-4 or equivalent indicating the periods of time for which data are not available.

E. Licensees or registrants are not required to partition the historical dose between external dose equivalent(s) and internal committed dose equivalent(s). Further, occupational exposure histories obtained and recorded on department Form DRC-4 or equivalent before January 1, 1994, may not have included effective dose equivalent, but may be used in the absence of specific information on the intake of radionuclides by the individual.

F. If the licensee or registrant is unable to obtain a complete record of an individual's current and previously accumulated occupational dose, the licensee or registrant shall assume:

1. in establishing administrative controls pursuant to LAC 33:XV.410.F for the current year, that the allowable dose limit for the individual is reduced by 12.5 mSv (1.25 rem) for each quarter for which records were unavailable and the individual was engaged in activities that could have resulted in occupational radiation exposure; and

2. that the individual is not available for planned special exposures.

G. The licensee or registrant shall retain the records on department Form DRC-4 or equivalent until the department terminates each pertinent license or registration requiring this record. The licensee or registrant shall retain records used in preparing department Form DRC-4 or equivalent for three years after the record is made.

La. Admin. Code tit. 33, § XV-414

Promulgated by the Department of Environmental Quality, Nuclear Energy Division, LR 13:569 (October 1987), amended by the Office of Air Quality and Radiation Protection, Radiation Protection Division, LR 19:1421 (November 1993), LR 22:970 (October 1996), LR 24:2095 (November 1998), amended by the Office of Environmental Assessment, Environmental Planning Division, LR 26:2575 (November 2000).

AUTHORITY NOTE: Promulgated in accordance with R.S. 30:2001 et seq.