DHS 157.25(2)(2)Conditions requiring individual monitoring of external and internal occupational dose. A licensee or registrant shall monitor exposures from sources of radiation at levels sufficient to demonstrate compliance with the occupational dose limits of this subchapter. Monitoring devices may be changed quarterly, provided the assignee has not exceeded 10% of the occupational limits in s. DHS 157.22 (1) (a). If the assignee exceeds 10% of the occupational limits, the monitoring device shall be changed monthly. As a minimum, a licensee or registrant shall do all the following:
DHS 157.25(2)(a)(a) Monitor occupational exposure to radiation sources under their control and supply and require the use of individual monitoring devices by all of the following:
DHS 157.25(2)(a)1.1. Adults likely to receive, in one year from sources external to the body, a dose in excess of 10% of the limits in s. DHS 157.22 (1) (a). Monitoring devices shall be individually assigned and not shared.
DHS 157.25(2)(a)2.2. Minors likely to receive in one year, from radiation sources external to the body, a deep-dose equivalent in excess of 1.0 mSv (0.1 rem), a lens-dose equivalent in excess of 1.5 mSv (0.15 rem), or a shallow-dose equivalent to the skin or to the extremities in excess of 5 mSv (0.5 rem).
DHS 157.25(2)(a)3.3. A declared pregnant woman likely to receive, in one year from sources external to the body, a dose in excess of one mSv (0.1 rem).
DHS 157.25(2)(a)4.4. An individual entering a high or very high radiation area.
DHS 157.25(2)(a)5.5. An individual operating medical fluoroscopic equipment.
DHS 157.25(2)(b)(b) Monitor, to determine compliance with s. DHS 157.22 (4), the occupational intake of radioactive material by and assess the committed effective dose equivalent to all of the following individuals:
DHS 157.25(2)(b)1.1. Adults likely to receive, in one year, an intake in excess of 10% of the applicable ALI in Table I, Columns 1 and 2, of ch. DHS 157 Appendix E.
DHS 157.25(2)(b)2.2. Minors likely to receive, in one year, a committed effective dose equivalent in excess of 1.0 mSv (100 mrem).
DHS 157.25(2)(b)3.3. Declared pregnant women likely to receive, during the entire pregnancy, a committed dose equivalent in excess of 1.0 mSv (100 mrem).
DHS 157.25(3)(3)Location of individual monitoring devices. A licensee or registrant shall ensure that individuals who are required to monitor occupational doses under sub. (2) wear individual monitoring devices as follows:
DHS 157.25(3)(a)(a) An individual monitoring device used for monitoring the dose to the whole body shall be worn at the unshielded location of the whole body likely to receive the highest exposure.
DHS 157.25(3)(b)(b) If a protective apron is worn, the individual monitoring device shall be located at the neck, which is the 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 157.25(3)(c)(c) An individual monitoring device used for monitoring the dose to an embryo or fetus of a declared pregnant woman, under s. DHS 157.22 (8) (a), shall be located at the waist under any protective apron being worn by the woman.
DHS 157.25(3)(d)(d) An individual monitoring device used for monitoring the lens dose equivalent, to demonstrate compliance with s. DHS 157.22 (1) (a) 2. a., shall be located at the neck or collar, outside any protective apron being worn by the monitored individual or at an unshielded location closer to the eye.
DHS 157.25(3)(e)(e) An individual monitoring device used for monitoring the dose to the extremities, to demonstrate compliance with s. DHS 157.22 (1) (a) 2. b., shall be worn on the extremity likely to receive the highest exposure. Each individual monitoring device shall be oriented to measure the highest dose to the extremity being monitored.
DHS 157.25 HistoryHistory: CR 01-108: cr. Register July 2002 No. 559, eff. 8-1-02; correction in (2) (a) 2. made under s. 13.93 (2m) (b) 7., Stats., Register July 2002 No. 559; CR 06-021: r. and recr. (2) (a) 2., Register October 2006 No. 610, eff. 11-1-06; CR 09-062: r. (2) (a) 6. Register April 2010 No. 652, eff. 5-1-10; CR 16-078: am. (1) (a) 1., 2. (intro.), b., c., cr. (1) (d), am. (2) (a) 5. Register January 2018 No. 745, eff. 2-1-18; correction in (2) (b) 1. made under s. 35.17, Stats., Register January 2018 No. 745.
DHS 157.26DHS 157.26Control of exposure from external sources in restricted areas.
DHS 157.26(1)(1)Control of access to high radiation areas.
DHS 157.26(1)(a)(a) A licensee or registrant shall ensure that each entrance or access point to a high radiation area has one or more of the following features:
DHS 157.26(1)(a)1.1. A control device that, upon entry into the area, causes the level of radiation to be reduced below that level at which an individual might receive a deep dose equivalent of one mSv (100 mrem) in one hour at 30 centimeters from the source of radiation or from any surface that the radiation penetrates.
DHS 157.26(1)(a)2.2. A control device that energizes a conspicuous visible or audible alarm signal so that the individual entering the high radiation area and the supervisor of the area are made aware of the entry.
DHS 157.26(1)(a)3.3. Entryways that are locked, except during periods when access to the areas is required, with control over each individual entry.
DHS 157.26(1)(b)(b) In place of the controls required under par. (a) for a high radiation area, a licensee or registrant may substitute continuous direct or electronic surveillance that is capable of preventing unauthorized entry.
DHS 157.26(1)(c)(c) A licensee or registrant may apply to the department for approval of alternative methods for controlling access to high radiation areas.
DHS 157.26(1)(d)(d) A licensee or registrant shall establish the controls required under par. (a) 1. and 3. in a way that does not prevent individuals from leaving a high radiation area.
DHS 157.26(1)(e)(e) A licensee or registrant is not required to control each entrance or access point to a room or other area that is a high radiation area solely because of the presence of radioactive materials prepared for transport and packaged and labeled under the regulations of the U.S. department of transportation provided that all of the following conditions are met:
DHS 157.26(1)(e)1.1. The packages do not remain in the area longer than 3 days.