DHS 157.52(5)(c) (c) Each sealed source of radioactive material shall be tested at intervals not to exceed 6 months, except energy compensation sources which may be tested every 3 years. In the absence of a certificate from a transferor indicating that a test has been made prior to the transfer, the sealed source may not be put into use until tested. If, for any reason, it is suspected that a sealed source may be leaking, it shall be removed from service immediately and tested for leakage within 30 calendar days.

DHS 157.52(6) (6) Leaking or contaminated sources. If leak testing of a source reveals the presence of 185 becquerels (0.005 microcurie) or more of leakage or contamination, a licensee shall immediately withdraw the source from use and shall cause it to be decontaminated, repaired or disposed of under the requirements of this chapter. A licensee shall file a written report with the department within 5 days of receiving the test results that describes the equipment involved, the test results and the corrective action taken.

DHS 157.52(7) (7) Exemptions. The following sources are exempted from the requirements of subs. (5) and (6).

DHS 157.52(7)(a) (a) Hydrogen-3 sources.

DHS 157.52(7)(b) (b) Sources of radioactive material with a half-life of 30 days or less.

DHS 157.52(7)(c) (c) Sealed sources of radioactive material in gaseous form.

DHS 157.52(7)(d) (d) Sources of beta- or gamma-emitting radioactive material with an activity of 3.7 MBq (100 microcuries) or less.

DHS 157.52(7)(e) (e) Sources of alpha- or neutron emitting radioactive material with an activity of 0.370 MBq (10 microcuries) or less.

DHS 157.52(8) (8) Physical inventory. A licensee or registrant shall conduct a semi-annual physical inventory to account for all sources of radiation. Records of inventories shall be maintained for 3 years from the date of the inventory for inspection by the department and shall include the quantities and kinds of sources of radiation, the location where sources of radiation are assigned, the date of the inventory and the name of the individual conducting the inventory.

DHS 157.52(9) (9) Utilization records. A licensee or registrant shall maintain current records, which shall be kept available for inspection by the department for 3 years from the date of the recorded event, showing all of the following information for each source of radiation:

DHS 157.52(9)(a) (a) Make, model number and a serial number or a description of each source of radiation used.

DHS 157.52(9)(b) (b) The identity of the well logging supervisor who is responsible for the sources of radiation used and the identity of the well logging assistants present.

DHS 157.52(9)(c) (c) Locations where used and dates of use.

DHS 157.52(9)(d) (d) In the case of tracer materials and radioactive markers, the utilization record shall indicate the radionuclide and activity used in a particular well and the disposition of any unused tracer material.

DHS 157.52(10) (10) Design performance criteria for sealed sources.

DHS 157.52(10)(a) (a) Each sealed source, except those containing radioactive material in gaseous form or in energy compensation sources (ECS), used in well logging applications, shall meet all the following criteria:

DHS 157.52(10)(a)1. 1. Have doubly encapsulated construction.

DHS 157.52(10)(a)2. 2. Contain licensed material whose chemical and physical forms are as insoluble and non-dispersable as practical.

DHS 157.52(10)(a)3. 3. Meet the requirements of par. (b).

DHS 157.52(10)(b) (b) Each sealed source, except those used in energy compensation sources (ECS), shall meet one of the following requirements:

DHS 157.52(10)(b)1. 1. For a sealed source manufactured on or before July 14, 1989, the requirements from the United States of America Standards Institute N5.10-1968, “Classification of Sealed Radioactive Sources.”

DHS 157.52(10)(b)2. 2. For a sealed source manufactured after July 14, 1989, the oil-well logging requirements from the American National Standard Institute/Health Physics Society N43.6-1997, “Sealed Radioactive Sources-Classification.”

DHS 157.52(10)(b)3. 3. For a sealed source manufactured after July 14, 1989, the sealed source’s prototype has been tested and found to maintain its integrity after each of the following tests:

DHS 157.52(10)(b)3.a. a. Temperature. The test source shall be held at -40 degrees Celsius for 20 minutes, 600 degrees Celsius for one hour, and then be subjected to a thermal shock test with a temperature drop from 600 degrees Celsius to 20 degrees Celsius within 15 seconds.

DHS 157.52(10)(b)3.b. b. Impact. A 5 kilogram (kg) steel hammer, 2.5 centimeters in diameter, shall be dropped from a height of 1 meter (m) onto the test source.

DHS 157.52(10)(b)3.c. c. Vibration. The test source shall be subjected to a vibration from 25 Hertz (Hz) to 500 Hz with a peak amplitude of five times the acceleration of gravity for 30 minutes.

DHS 157.52(10)(b)3.d. d. Puncture. A 1 gram (gm) hammer and pin, 0.3 centimeter (cm) pin diameter, shall be dropped from a height of 1 meter (m) onto the test source.

DHS 157.52(10)(b)3.e. e. Pressure. The test source shall be subjected to an external pressure of 24,600 pounds per square inch absolute (1.695 X 107 pascals) without leakage.

DHS 157.52 Note Note: The publication, “Sealed Radioactive Sources — Classification,” American National Standard Institute/Health Physics Society N43.6-1997, published by the American National Standard Institute, may be consulted at the Department of Health Services, Radiation Protection Section, 1 West Wilson St, Room 150, Madison WI 53702-0007 or at the Legislative Reference Bureau. The publication may be purchased from the Health Physics Society, 1313 Dolley Madison Blvd., Suite 402, McLean, VA 22101.