DHS 157.03(412)(412) “Visible area” means that portion of the input surface of the image receptor over which incident x-ray photons are producing a visible image.

DHS 157.03(413)(413) “Waste” means those low-level radioactive wastes containing source, special nuclear, or byproduct material that are acceptable for disposal in a land disposal facility. For the purposes of this definition, “low-level radioactive waste” means radioactive waste not classified as high-level radioactive waste, transuranic waste, spent nuclear fuel, or byproduct material as defined in sub. (50) (b) to (e).

DHS 157.03(414)(414) “Waste handling licensee” mean a person licensed to receive and store radioactive residue prior to disposal and a person licensed to dispose of radioactive residue.

DHS 157.03(415)(415) “Wedge filter” means a filter which effects continuous change in transmission over all or a part of the useful beam.

DHS 157.03(416)(416) “Week” means 7 consecutive days starting on Sunday.

DHS 157.03(417)(417) “Weighting factor” or “wT” for an organ or tissue means the proportion of the risk of stochastic effects resulting from irradiation of that organ or tissue to the total risk of stochastic effects when the whole body is irradiated uniformly. For calculating the effective dose equivalent, the values of wT are:

a/ 0.30 results from 0.06 for each of 5 “remainder” organs, excluding the skin and the lens of the eye, that receive the highest doses.

b/ For the purpose of weighting the external whole body dose, for adding it to the internal dose, a single weighting factor, wT = 1.0, has been specified. The department shall approve the use of other weighting factors for external exposure on a case-by-case basis until such time as specific guidance is issued.

DHS 157.03(418)(418) “Well” means a drilled hole in which well logging may be performed.

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.