DHS 157.03(419)(419) “Well logging” means all operations involving the lowering and raising of measuring devices or tools which may contain sources of radiation into wells or cavities for the purpose of obtaining information about the well or adjacent formations which may be used in oil, gas, mineral, groundwater or geological exploration. DHS 157.03(419m)(419m) ”Well logging assistant” means any individual who, under the personal supervision of a well logging supervisor, handles sources of radiation that are not in logging tools or shipping containers or who performs surveys required by s. DHS 157.55. DHS 157.03(420)(420) “Well logging supervisor” means any individual who uses sources of radiation or provides personal supervision of the use of sources of radiation at the well site and who is responsible for assuring compliance with the requirements of this chapter. DHS 157.03(421)(421) “Well logging tool” means a device used subsurface to perform well logging. DHS 157.03(422)(422) “Whole body” means, for purposes of external exposure, head, trunk including male gonads, arms above the elbow or legs above the knee. DHS 157.03(423)(423) “Wipe sample” means a piece of material used to wipe over the area of a surface or device to collect radioactive contamination. DHS 157.03(426)(426) “Worker” means an individual engaged in work under a license or registration issued by the department and controlled by a licensee or registrant, but does not include the licensee or registrant. DHS 157.03(427)(427) “Working level” or “WL” means any combination of short-lived radon daughters in one liter of air that will result in the ultimate emission of 1.3E+5 MeV of potential alpha particle energy. The short-lived radon daughters are for radon-222: polonium-218, lead-214, bismuth-214 and polonium-214; and for radon-220: polonium-216, lead-212, bismuth-212, and polonium-212. DHS 157.03(428)(428) “Working level month” or “WLM” means an exposure to one working level for 170 hours. Two thousand working hours per year divided by 12 months per year is approximately equal to 170 hours per month. DHS 157.03(429)(429) “Written directive” means an authorized user’s written order for the administration of radioactive material or radiation from radioactive material or a radiation machine to a specific patient or human research subject. DHS 157.03(429m)(429m) “X-ray control” means a device which controls input power to the x-ray high-voltage generator or the x-ray tube. It includes equipment such as timers, phototimers, automatic brightness stabilizers, and similar devices, which control the technique factors on an x-ray exposure. DHS 157.03(430)(430) “X-ray equipment” means an x-ray system, subsystem or component thereof that is one of the following: DHS 157.03(431)(431) “X-ray exposure control” means a device, switch, button or other similar means by which an operator initiates or terminates the radiation exposure. An x-ray exposure control may include such associated equipment as timers and back-up timers. DHS 157.03(432)(432) “X-ray field” means that area of the intersection of the useful beam and any one of the set of planes parallel to and including the plane of the image receptor whose perimeter is the locus of points at which the exposure rate is one-fourth of the maximum in the intersection. DHS 157.03(433)(433) “X-ray high-voltage generator” means a device that transforms electrical energy from the potential supplied by an x-ray control to the tube operating potential. The device may also include means for transforming alternating current to direct current, filament transformers for an x-ray tube or tubes, high-voltage switches, electrical protective devices and other appropriate elements. DHS 157.03(434)(434) “X-ray system” means an assemblage of components for the controlled production of x-rays. It includes minimally an x-ray high-voltage generator, an x-ray control, a tube housing assembly, a beam-limiting device and the necessary supporting structures. Additional components, which function with the system, are considered integral parts of the system. DHS 157.03(435)(435) “X-ray table” means a patient support device with its patient support structure (tabletop) interposed between the patient and the image receptor during radiography or fluoroscopy. An x-ray table includes any stretcher equipped with a radiolucent panel and any table equipped with a cassette tray, cassette tunnel, image intensifier or spot-film device beneath the tabletop. DHS 157.03(436)(436) “X-ray tube” means any electron tube designed to be used primarily for the production of x-rays. DHS 157.03(437)(437) “Year” means the period beginning on January 1st used to determine compliance with the provisions of this chapter. The licensee or registrant may change the starting date of the year used to determine compliance by the licensee or registrant provided that the change is made at the beginning of the year and that no day is omitted or duplicated in consecutive years. DHS 157.03 HistoryHistory: CR 01-108: cr. Register July 2002 No. 559, eff. 8-1-02; CR 06-021: am. (1), (2), (13), (46), (98), (140), (141), (198) (a), (c), (199) (b), (200) (intro.), (c), (201), (210) (a) (intro.), (224), (225), (296), (326), (327), (334), (353), (376) (b), (390), (398), (418), (419) and (428); cr. (17m), (32m), (57g), (57r), (75m), (82m), (84m), (87m), (101m), (103m), (124m), (143m), (150m), (185m), (185r), (197m), (210) (a) 5., (247m), (251m), (264m), (279m), (295m), (371m), (402m) and (419m); r. and recr. (32), (68), (198) (d) and (267); r. (210) (d), (e), (424) and (425) Register October 2006 No. 610, eff. 11-1-06; correction in (97) made under s. 13.92 (4) (b) 6., Stats., Register January 2009 No. 637; CR 09-062: am. (5), (6), (32m) (a), (33) (a), (50) (intro.), (a), (191), (200) (intro.), (222), (374) (c), (d), (382), (388), (402m), (407) and (413), cr. (50) (c) to (e), (75r), (103r), (221m), (264r) and (429m) Register April 2010 No. 652, eff. 5-1-10; CR 16-078: cr. (6m), (12m), (25m), (36m), (56g), (56r), (77m), r. and recr. (84m), cr. (108m), (109m), (124g), (139m), (143g), (150g), (166m), (189m), (193m), r. and recr. (198), am. (200) (c), (208), cr. (215m), (219m), am. (221m), cr. (228m), (230m), (318m), (319g), (319r), (331g), (331r), (374m), (392m), (393m), (402g), am. (404), (419m) Register January 2018 No. 745, eff. 2-1-18; correction in (25m) made under s. 13.92 (4) (b) 7., Stats., and correction in (1), (2), (16) (a), (56g), (56r), (77m), (198) (d), (397) made under s. 35.17, Stats., Register January 2018 No. 745, eff. 2-1-18; CR 22-015: am. (22), cr. (30m), (40m), (45m), (57c), (57w), (66m), am. (143), cr. (193e), am. (204), cr. (235m), (239m), renum. (251m) to (252g) and am., cr. (252r), am. (267), cr. (288m), am. (295m), cr. (331m), (336m), am. (374c), am. (391) Register June 2023 No. 810, eff. 7-1-23; correction in (239m) (a) made under s. 35.17, Stats., Register June 2023 No. 810. DHS 157.04DHS 157.04 Exemptions from the regulatory requirements. DHS 157.04(1)(1) General. The department may, upon application or upon its own initiative, grant such exemptions or exceptions from the requirements of this chapter as it determines are authorized by law and will not result in undue hazard to public health and safety or property or endanger the common defense and security. DHS 157.04(2)(2) U.S. DOE and NRC contractors. U.S. department of energy contractors or subcontractors and any NRC contractor or subcontractor in any of the following categories operating within this state are exempt from this chapter to the extent that the contractor or subcontractor under their contract receives, possesses, uses, transfers or acquires sources of radiation: DHS 157.04(2)(a)(a) Prime contractors performing work for the U.S. department of energy at U.S. government owned or controlled sites, including the transportation of byproduct material to or from such sites and the performance of contract services during temporary interruptions of such transportation. DHS 157.04(2)(b)(b) Prime contractors of the U.S. department of energy performing research in, or development, manufacture, storage, testing or transportation of atomic weapons or components of atomic weapons. DHS 157.04(2)(c)(c) Prime contractors of the U.S. department of energy using or operating nuclear reactors or other nuclear devices in a United States government owned vehicle or vessel.