DHS 157.22(1)(a)(a) A licensee or registrant shall control the occupational dose to individual adults, except for planned special exposures under sub. (6), to the following dose limits:
DHS 157.22(1)(a)1.1. An annual limit, which is the more limiting of either of the following:
DHS 157.22(1)(a)1.a.a. The total effective dose equivalent being equal to 0.05 Sv (5 rem).
DHS 157.22(1)(a)1.b.b. The sum of the deep dose equivalent and the committed dose equivalent to any individual organ or tissue other than the lens of the eye being equal to 0.5 Sv (50 rem).
DHS 157.22(1)(a)2.2. The annual limits to the lens of the eye, to the skin of the whole body and to the skin of the extremities which are:
DHS 157.22(1)(a)2.a.a. A lens dose equivalent of 0.15 Sv (15 rem).
DHS 157.22(1)(a)2.b.b. A shallow dose equivalent of 0.5 Sv (50 rem) to the skin of the whole body or to the skin of any extremity.
DHS 157.22(1)(b)(b) Doses received in excess of the annual limits, including doses received during accidents, emergencies and planned special exposures, shall be subtracted from the limits for planned special exposures that the individual may receive during the current year and during the individual’s lifetime.
DHS 157.22(1)(c)(c) The assigned deep dose equivalent and shallow dose equivalent shall be for the portion of the body receiving the highest exposure, as follows:
DHS 157.22(1)(c)1.1. When the external exposure is determined by measurement with an external personal monitoring device, the deep-dose equivalent shall be used in place of the effective dose equivalent, unless the effective dose equivalent is determined by a method approved by the department. The assigned deep-dose equivalent shall be for the part of the body receiving the highest exposure. The assigned shallow-dose equivalent shall be the dose averaged over the contiguous 10 square centimeters of skin receiving the highest exposure. The deep-dose equivalent, lens-dose equivalent and shallow-dose equivalent may be assessed from surveys or other radiation measurements for the purpose of demonstrating compliance with the occupational dose limits, if the individual monitoring device was not in the region of highest potential exposure, or the results of individual monitoring are unavailable.
DHS 157.22(1)(c)2.2. When a protective apron is worn while working with medical fluoroscopic equipment and monitoring is conducted as specified in s. DHS 157.25 (2) (a) 5., the effective dose equivalent for external radiation shall be determined as follows:
DHS 157.22(1)(c)2.a.a. When only one individual monitoring device is used and it is located at the neck outside the protective apron, and the exposure is less than 25% of any limit specified in par. (a), the reported deep dose equivalent shall be the effective dose equivalent for external radiation.
DHS 157.22(1)(c)2.b.b. When only one individual monitoring device is used and it is located at the neck outside the apron and the exposure is greater than 25% of the any limit specified in par. (a), the effective dose equivalent shall be the deep dose equivalent multiplied by 0.3.
DHS 157.22(1)(c)2.c.c. If a protective apron is worn, the individual monitoring device shall be located at the neck, which is, collar. If a second monitoring device is used, for the same purpose, it shall be located under the protective apron at the waist. The estimated effective dose equivalent (HE) when wearing 2 monitoring devices, one located outside and one under a protective apron, shall be calculated using the following formula: HE (estimate) = 1.5 HW + 0.04 HN where HW = badge reading from the waist badge under the apron and HN = badge reading from the neck badge worn outside the apron.
DHS 157.22(1)(d)(d) Derived air concentration and annual limit on intake values are specified in Table I of ch. DHS 157 Appendix E and may be used to determine the individual’s dose and to demonstrate compliance with the occupational dose limits.
DHS 157.22 NoteNote: See s. DHS 157.31 (7) for instructions about recording the exposure levels.
DHS 157.22(1)(e)(e) In addition to the annual dose limits, a licensee or registrant shall limit the soluble uranium intake by an individual to 10 milligrams in a week in consideration of chemical toxicity.
DHS 157.22 NoteNote: See footnote c/ of ch. DHS 157 Appendix E for the calculation method for determining DAC for soluble mixtures of uranium.
DHS 157.22(1)(f)(f) A licensee or registrant shall reduce the dose that an individual may be allowed to receive in the current year by the amount of occupational dose received while employed by any other person during the current year.
DHS 157.22 NoteNote: See sub. (5) for instruction on determining occupational dose.
DHS 157.22(2)(2)Compliance with requirements for summation of external and internal doses.
DHS 157.22(2)(a)(a) If a licensee or registrant is required to monitor under both s. DHS 157.25 (2) (a) and (b), a licensee or registrant shall demonstrate compliance with the dose limits by summing external and internal doses. If a licensee or registrant is required to monitor only under s. DHS 157.25 (2) (a) or (b), then summation is not required to demonstrate compliance with the dose limits. A licensee or registrant may demonstrate compliance with the requirements for summation of external and internal doses by meeting one of the conditions in par. (b) and the conditions of pars. (c) and (d). The dose equivalents for the lens of the eye, the skin and the extremities are not included in the summation, but are subject to separate limits.
DHS 157.22(2)(b)(b) If the only intake of radionuclides is by inhalation, the total effective dose equivalent limit is not exceeded if the sum of the deep dose equivalent divided by the total effective dose equivalent limit, and any one of the following, does not exceed unity:
DHS 157.22(2)(b)1.1. The sum of the fractions of the inhalation ALI for each radionuclide.
DHS 157.22(2)(b)2.2. The total number of derived air concentration-hours for all radionuclides divided by 2,000.
DHS 157.22(2)(b)3.3. The sum of the calculated committed effective dose equivalents to all significantly irradiated organs or tissues calculated from bioassay data using appropriate biological models and expressed as a fraction of the annual limit. For purposes of this subdivision, an organ or tissue is deemed to be significantly irradiated if, for that organ or tissue, the product of the weighting factors, wT, and the committed dose equivalent, HT,50, per unit intake is greater than 10% of the maximum weighted value of HT,50, that is, wTHT,50, per unit intake for any organ or tissue.
DHS 157.22(2)(c)(c) If the occupationally exposed individual also receives an intake of radionuclides by oral ingestion greater than 10% of the applicable oral ALI, a licensee or registrant shall account for this intake and include it in demonstrating compliance with the limits.
DHS 157.22(2)(d)(d) A licensee or registrant shall evaluate and, to the extent practical, account for intakes through wounds or skin absorption. The intake through intact skin has been included in the calculation of DAC for hydrogen-3 and does not need to be evaluated or taken into account.
DHS 157.22(3)(3)Determination of external doses from airborne radioactive material.