OAR 333-120-0630: Records: Determination of Prior Occupational Dose

(1) For each individual likely to receive, in a year, an occupational dose requiring monitoring pursuant to OAR 333-120-0210, the licensee or registrant must: (a) Determine the occupational radiation dose received during the current year; and (b) Attempt to obtain the records of lifetime cumulative occupational radiation dose. (2) Prior to permitting an individual to participate in a planned special exposure, the licensee or registrant must determine: (a) The internal and external doses from all previous planned special exposures; and (b) All doses in excess of the limits (including doses received during accidents and emergencies) received during the lifetime of the individual. (3) In complying with the requirements of section (1) or (2) of this rule, a licensee or registrant may: (a) 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 may have received during the current year; or (b) Accept, as the record of lifetime cumulative radiation dose, an up-to-date NRC Form 4, or equivalent, signed by the individual and counter-signed 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 (c) Obtain reports of the individual's dose equivalent(s) 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, electronic media, or letter. The licensee or registrant must request a written verification of the dose data if the authenticity of the transmitted report cannot be established. (4) The licensee or registrant must record the exposure history, as required by section (1) of this rule, on NRC Form 4, or other clear and legible record, of all the information required on NRC Form 4. The form or record must show each period in which the individual received occupational exposure to radiation or radioactive material and must be signed by the individual who received the exposure. For each period for which the licensee or registrant obtains reports, the licensee or registrant must use the dose shown in the report in preparing NRC Form 4. For any period in which the licensee or registrant does not obtain a report, the licensee or registrant must place a notation on NRC Form 4 indicating the periods of time for which data are not available. (5) 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 must assume: (a) In establishing administrative controls under OAR 333-120-0100(6) for the current year, that the allowable dose limit for the individual is reduced by 1.25 rem (12.5 mSv) for each quarter for which records were unavailable and the individual was engaged in activities that could have resulted in occupational radiation exposure; and (b) That the individual is not available for planned special exposures. (6) The licensee or registrant must retain the records on NRC Form 4 or equivalent until the Authority terminates each pertinent license or registration requiring this record. The licensee or registrant must retain records used in preparing NRC Form 4 in accordance with OAR 333-100-0057.