Document: 10 CFR Part 20
Document ID: 7dff879c-e38a-463f-9460-07edc2517bf8
Document Type: cfr
Title: Determination of prior occupational dose.
Source: 10 CFR Part 20
Source URL: https://www.ecfr.gov/current/title-10/part-20/section-20.2104
Revision Date: 
Chapter: 
Section ID: 20.2104
CFR Part: 20
CFR Title: 10

Content:
§ 20.2104 Determination of prior occupational dose. ( a ) For each individual who is likely to receive an annual occupational dose requiring monitoring under § 20.1502 , the licensee shall determine the occupational radiation dose received during the current year. ( b ) Prior to permitting an individual to participate in a planned special exposure, the licensee 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 paragraphs (a) or (b) of this section, a licensee 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 may have received during the current year; ( 2 ) Accept, as the record of cumulative radiation dose, an up-to-date NRC Form 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); and ( 3 ) 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) by telephone, telegram, electronic media, or letter. The licensee shall request a written verification of the dose data if the authenticity of the transmitted report cannot be established. ( d ) The licensee shall record the exposure history of each individual, as required by paragraphs (a) or (b) of this section, on NRC Form 4, or other clear and legible