skin and thyroid cancers are more easily treated than leukemias or lung and breast cancers, which involve a larger degree of suffering and costs. The activity of each of the radionuclides H-3, C-14, Tc-99, and I-129 contained in the shipment; and. contact the publishing agency. 20.2207 Reports of transactions involving nationally tracked sources. If the dose is later found to be less than the estimated dose, the corrected value may be used. (e) Radionuclide identities and activities contained in the waste, the masses of U-233, U-235, and plutonium in special nuclear material, and the masses of uranium and thorium in source material if contained in the waste. 62 FR 39088, July 21, 1997, unless otherwise noted. Radioactive materials deposited inside the body have produced some ARS effects only in extremely rare cases. (b) Unless respiratory protective equipment is used, as provided in 20.1703, or the assessment of intake is based on bioassays, the licensee shall assume that an individual inhales radioactive material at the airborne concentration in which the individual is present. (d) Intake through wounds or absorption through skin. result, it may not include the most recent changes applied to the CFR. (3) Declared pregnant women likely to receive, during the entire pregnancy, a committed effective dose equivalent in excess of 0.1 rem (1 mSv). Management of Terrorist Events Involving Radioactive Material, NCRP Report No. It was noted that astronauts face many other risks and adding . The licensee shall retain these records for 3 years after the record is made. reports. (d) Each licensee that disassembles a nationally tracked source shall complete and submit a National Source Tracking Transaction Report. Sunburn is measured as the minimal erythemal dose (MED) in response to acute UV exposure. (Abbreviated organ or tissue designations are used: LLI wall = lower large intestine wall; St. wall = stomach wall; Blad wall = bladder wall; and Bone surf = bone surface.). (1) Accept, as a record of the occupational dose that the individual received during the current year, a written signed statement from the individual, or from the individual's most recent employer for work involving radiation exposure, that discloses the nature and the amount of any occupational dose that the individual may have received during the current year; (2) Accept, as the record of cumulative radiation dose, an up-to-date NRC Form 4, or equivalent, signed by the individual and countersigned by an appropriate official of the most recent employer for work involving radiation exposure, or the individual's current employer (if the individual is not employed by the licensee); and. (b) If the licensee performs an ALARA analysis to determine whether or not respirators should be used, the licensee may consider safety factors other than radiological factors. For the purposes of regulation 12 (2), the limit on effective dose for employees or trainees of 18 years or above is 100 mSv in any period of five consecutive calendar years subject to a. Very high radiation area means an area, accessible to individuals, in which radiation levels from radiation sources external to the body could result in an individual receiving an absorbed dose in excess of 500 rads (5 grays) in 1 hour at 1 meter from a radiation source or 1 meter from any surface that the radiation penetrates. The concentration values were derived by taking the most restrictive occupational stochastic oral ingestion ALI and dividing by 7.3 106 (ml). (g) Containers holding licensed material (other than sealed sources that are either specifically or generally licensed) at a facility licensed under Parts 50 or 52 of this chapter, not including non-power reactors, that are within an area posted under the requirements in 20.1902 if the containers are: (1) Conspicuously marked (such as by providing a system of color coding of containers) commensurate with the radiological hazard; (2) Accessible only to individuals who have sufficient instruction to minimize radiation exposure while handling or working in the vicinity of the containers; and. h The licensee should implement institutional controls to assure that these devices are not used in areas immediately dangerous to life or health (IDLH). (2) Personnel in attendance take necessary precautions to prevent the inadvertent exposure of workers, other patients, and members of the public to radiation in excess of the limits established in this part. (2) The area or room is subject to the licensee's control. (i) For holders of an operating license for a nuclear power plant, the events included in paragraph (b) of this section must be reported in accordance with the procedures described in 50.73(b), (c), (d), (e), and (g) of this chapter and must include the information required in paragraph (b)(1) of this section, and. Generally applicable environmental radiation standards means standards issued by the Environmental Protection Agency (EPA) under the authority of the Atomic Energy Act of 1954, as amended, that impose limits on radiation exposures or levels, or concentrations or quantities of radioactive material, in the general environment outside the boundaries of locations under the control of persons possessing or using radioactive material. The eCFR is displayed with paragraphs split and indented to follow Airborne radioactivity measurements and DAC values should not be used as the primary means to assess the deep-dose equivalent when the airborne radioactive material includes radionuclides other than noble gases or if the cloud of airborne radioactive material is not relatively uniform. Rad is the special unit of absorbed dose. Note that for some shipments, the disposal container may be the transport package. 25, 1995]. This document is available in the following developer friendly formats: Information and documentation can be found in our For purposes of section 223, all the regulations in 20.1001 through 20.2402 are issued under one or more of sections 161b, 161i, or 161o, except for the sections listed in paragraph (b) this section. The licensee may include additional data for individuals for whom monitoring was provided but not required. 3. (a) The requirements of this section and appendix G to 10 CFR part 20 are designed to -. (1) Control transfers of low-level radioactive waste by any waste generator, waste collector, or waste processor licensee, as defined in this part, who ships low-level waste either directly, or indirectly through a waste collector or waste processor, to a licensed low-level waste land disposal facility (as defined in part 61 of this chapter); (2) Establish a manifest tracking system; and. Notify the shipper and the Administrator of the nearest Commission Regional Office listed in appendix D of this part when any shipment, or part of a shipment, has not arrived within 60 days after receipt of an advance manifest, unless notified by the shipper that the shipment has been cancelled. 25, 1995; 61 FR 65127, Dec. 10, 1996; 68 FR 14308, Mar. 25, 1995; 63 FR 39482, July 23, 1998; 85 FR 65661, Oct. 16, 2020; 85 FR 68243, Oct. 28, 2020]. The licensee should also consider the impact of respirator use on workers' industrial health and safety. (a) The Commission may obtain an injunction or other court order to prevent a violation of the provisions of -. Site boundary means that line beyond which the land or property is not owned, leased, or otherwise controlled by the licensee. The Medical Basis for Radiation Accident Preparedness: The Clinical Care of Victims. L. 95-91, 91 Stat. Start Printed Page 16300 (1) Informed of the purpose of the planned operation; (2) Informed of the estimated doses and associated potential risks and specific radiation levels or other conditions that might be involved in performing the task; and. Determination of prior occupational dose. 56 FR 23404, May 21, 1991, unless otherwise noted. A collector in signing the certification is certifying that nothing has been done to the collected waste which would invalidate the waste generator's certification. (3) The sum of these percentages for all of the radionuclides disregarded in the mixture does not exceed 30 percent. d Licensees may permit individuals to use this type of respirator who have not been medically screened or fit tested on the device provided that no credit be taken for their use in estimating intake or dose. The NCRP (1989 . The total disposal volume and disposal weight in the shipment; 4. The waste collector shall ensure that, for each container of waste in the shipment, the manifest identifies the generator of that container of waste; 3. (vi) Procedures or measures that have been, or will be, adopted to ensure against a recurrence of the loss or theft of licensed material. [68 FR 58801, Oct. 10, 2003, as amended at 74 FR 62680, Dec. 1, 2009; 80 FR 74979, Dec. 1, 2015]. When an ALI is determined by the non-stochastic dose limit to an organ, the organ or tissue to which the limit applies is shown, and the ALI for the stochastic limit is shown in parentheses. Annual equivalent doses for the skin, hands and feet are 500 mSv ( International Commission on Radiological Protection, 2007 ). 2201), and section 3(b)(2) of the Low-Level Radioactive Waste Policy Amendments Act of 1985 (99 Stat. (c) Before a planned special exposure, the licensee ensures that the individuals involved are -. (a) When it is not practical to apply process or other engineering controls to control the concentrations of radioactive material in the air to values below those that define an airborne radioactivity area, the licensee shall, consistent with maintaining the total effective dose equivalent ALARA, increase monitoring and limit intakes by one or more of the following means -, (3) Use of respiratory protection equipment; or. As used in this appendix, the following definitions apply: Chelating agent has the same meaning as that given in 61.2 of this chapter. [64 FR 54558, Oct. 7, 1999; 64 FR 55524, Oct. 13, 1999]. Symptoms are anorexia, fever, and malaise. Copies of manifests required by this appendix may be legible carbon copies, photocopies, or computer printouts that reproduce the data in the format of the uniform manifest. For purposes of this definition, accelerator is an equivalent term. (4) Records of the results of measurements and calculations used to evaluate the release of radioactive effluents to the environment. Records, such as letters, drawings, and specifications, must include all pertinent information, such as stamps, initials, and signatures. is available with paragraph structure matching the official CFR (d) Prior to permitting an individual to participate in a planned special exposure, the licensee ascertains prior doses as required by 20.2104(b) during the lifetime of the individual for each individual involved. Note that an additional factor of 2 for age considerations is not warranted in the submersion case. (d) The licensee has submitted a decommissioning plan or License Termination Plan (LTP) to the Commission indicating the licensee's intent to decommission in accordance with 30.36(d), 40.42(d), 50.82 (a) and (b), 70.38(d), or 72.54 of this chapter, and specifying that the licensee intends to decommission by restricting use of the site. If you would like to comment on the current content, please use the 'Content Feedback' button below for instructions on contacting the issuing agency. At doses between 10 and 15 Gy, transient erythema is expected as a prompt effect. 20.1404 Alternate criteria for license termination. The assigned deep-dose equivalent must be for the part of the body receiving the highest exposure. If the licensee is required to monitor only under 20.1502(a) or only under 20.1502(b), then summation is not required to demonstrate compliance with the dose limits. Grade D quality air criteria include -. (a) Each licensee shall use the units: curie, rad, rem, including multiples and subdivisions, and shall clearly indicate the units of all quantities on records required by this part. (1) Each licensee shall report by telephone as follows: (i) Immediately after its occurrence becomes known to the licensee, any lost, stolen, or missing licensed material in an aggregate quantity equal to or greater than 1,000 times the quantity specified in appendix C to part 20 under such circumstances that it appears to the licensee that an exposure could result to persons in unrestricted areas; or. Fit factor means a quantitative estimate of the fit of a particular respirator to a specific individual, and typically estimates the ratio of the concentration of a substance in ambient air to its concentration inside the respirator when worn. Bethesda , Maryland : Armed Forces Radiobiology Research Institute (AFRRI); 1999. Subpart D - Radiation Dose Limits for Individual Members of the Public. E. Any shipment or part of a shipment for which acknowledgement is not received within the times set forth in this section must: 1. Entrance skin dose is a directly measurable quantity, often, measured using thermoluminescent dosimeters (TLD) 1. Dose limits are intended to reduce the risk of serious effects occurring, such as cancer, and are in place to protect the eyes, skin and extremities against other forms of damage. Acceptable financial assurance mechanisms are those in paragraph (c) of this section. The annual occupational dose limits for minors (<18 years of age) are 10% of the annual dose . They function in combination with the fundamental principles of justification and optimisation. Notify the shipper and the Administrator of the nearest Commission Regional Office listed in appendix D of this part when any shipment, or part of a shipment, has not arrived within 60 days after receipt of an advance manifest, unless notified by the shipper that the shipment has been cancelled. Sometimes this occurs when radioactive . (b) Rooms or other areas in hospitals that are occupied by patients are not required to be posted with caution signs pursuant to 20.1902 provided that the patient could be released from licensee control pursuant to 35.75 of this chapter. Precisely record all clinical symptoms, particularly nausea, vomiting, diarrhea, and itching, reddening or blistering of the skin. The investigation shall include tracing the shipment and filing a report with the nearest Commission Regional Office listed in appendix D to this part. The licensee shall control and maintain constant surveillance of licensed material that is in a controlled or unrestricted area and that is not in storage. (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: (i) A lens dose equivalent of 15 rems (0.15 Sv), and (ii) A shallow-dose equivalent of 50 rem (0.5 Sv) to the skin of the whole body or to the skin of any extremity. (a) The licensee shall control the occupational dose to individual adults, except for planned special exposures under 20.1206, to the following dose limits. (ii) A shallow-dose equivalent of 50 rem (0.5 Sv) to the skin of the whole body or to the skin of any extremity. The shipper of the radioactive waste, shall provide the following information on the uniform manifest: 1. Licensees are not required by NRC to comply with the manifesting requirements of this part when they ship: (a) LLW for processing and expect its return (i.e., for storage under their license) prior to disposal at a licensed land disposal facility; (b) LLW that is being returned to the licensee who is the waste generator or generator, as defined in this part; or, (c) Radioactively contaminated material to a waste processor that becomes the processor's residual waste.. Other dose limits in the regulation also relevant when working in PETCT are the limit on the equivalent dose for the lens of the eye, being 20mSv in a year or 100mSv in any five consecutive years. Waste collector means an entity, operating under a Commission or Agreement State license, whose principal purpose is to collect and consolidate waste generated by others, and to transfer this waste, without processing or repackaging the collected waste, to another licensed waste collector, licensed waste processor, or licensed land disposal facility. The reconciliation process must include resolving any discrepancies between the National Source Tracking System and the actual inventory by filing the reports identified by paragraphs (a) through (e) of this section. C. Disposal Container and Waste Information. (d) Analyses and procedures to ensure that doses are maintained ALARA and within the dose limits in this part. The approximate volume of waste within a container; 9. Radiation Dose Limits Please do not provide confidential When a licensee is required by 20.2203 or 20.2204 to report to the Commission any exposure of an identified occupationally exposed individual, or an identified member of the public, to radiation or radioactive material, the licensee shall also provide the individual a report on his or her exposure data included in the report to Commission. 20.1009 Information collection requirements: OMB approval. Discrete source means a radionuclide that has been processed so that its concentration within a material has been purposely increased for use for commercial, medical, or research activities. The most restrictive limit is to the lens of the eye, which has an annual limit of 150 mSv (15 rem). ing a plutonium body-burden limit of 0.03 microcuries, a limit on the bone-mar-row dose of 300 millirem per week (about 15 rem per year), and a limit on the skin dose of 600 millirem per week (a factor of 2 lower than the value initially Radiation and Risk-A Hard Look at the Data [56 FR 23398, May 21, 1991; 56 FR 61352, Dec. 3, 1991, as amended at 57 FR 57878, Dec. 8, 1992; 60 FR 20185, Apr. (a) The licensee shall ensure that the dose equivalent to the embryo/fetus during the entire pregnancy, due to the occupational exposure of a declared pregnant woman, does not exceed 0.5 rem (5 mSv). The sum of such ratios for all radionuclides in the combination may not exceed 1 (i.e., unity). 56 FR 23408, May 21, 1991, unless otherwise noted. The licensee shall document in the LTP or decommissioning plan how the advice of individuals and institutions in the community who may be affected by the decommissioning has been sought and incorporated, as appropriate, following analysis of that advice. Gusev IA , Guskova AK , Mettler FA Jr, editors. Determination of the levels which are ALARA must take into account consideration of any detriments, such as deaths from transportation accidents, expected to potentially result from decontamination and waste disposal. (1) Monitor the external surfaces of a labeled[3a] package for radioactive contamination unless the package contains only radioactive material in the form of a gas or in special form as defined in 10 CFR 71.4; (2) Monitor the external surfaces of a labeled3a package for radiation levels unless the package contains quantities of radioactive material that are less than or equal to the Type A quantity, as defined in 71.4 and appendix A to part 71 of this chapter; and. According to The dose (amount) of radiation; How you were exposed, such as through skin contact, swallowing or breathing it in, or having rays pass through your body . Sanitary sewerage means a system of public sewers for carrying off waste water and refuse, but excluding sewage treatment facilities, septic tanks, and leach fields owned or operated by the licensee. Chemical description means a description of the principal chemical characteristics of a low-level radioactive waste. The regulations in this part apply to persons licensed by the Commission to receive, possess, use, transfer, or dispose of byproduct, source, or special nuclear material or to operate a production or utilization facility under parts 30 through 36, 39, 40, 50, 52, 60, 61, 63, 70, or 72 of this chapter, and in accordance with 10 CFR 76.60 to persons required to obtain a certificate of compliance or an approved compliance plan under part 76 of this chapter. If you have questions or comments regarding a published document please (2) For any violation for which a license may be revoked under Section 186 of the Atomic Energy Act of 1954, as amended. E. Multi-Generator Disposal Container Information. (eg: (2) The dose equivalent to the embryo/fetus resulting from radionuclides in the embryo/fetus and radionuclides in the declared pregnant woman. Bioassay (radiobioassay) means the determination of kinds, quantities or concentrations, and, in some cases, the locations of radioactive material in the human body, whether by direct measurement (in vivo counting) or by analysis and evaluation of materials excreted or removed from the human body. Exposure to radioactive noble gases is not considered a significant respiratory hazard, and protective actions for these contaminants should be based on external (submersion) dose considerations. Sometimes this occurs when radioactive materials contaminate a patients skin or clothes. (d) If the licensee chooses to assess intakes of Class Y material using the measurements given in 20.1204(a)(2) or (3), the licensee may delay the recording and reporting of the assessments for periods up to 7 months, unless otherwise required by 20.2202 or 20.2203, in order to permit the licensee to make additional measurements basic to the assessments. This device may not be used by any individual who experiences perceptible outward leakage of breathing gas while wearing the device. Medical Management of Radiation Accidents, 2 nd ed., New York : CRC Press, Inc.; 2001. (1) Each report required by paragraph (a) of this section must describe the extent of exposure of individuals to radiation and radioactive material, including, as appropriate: (i) Estimates of each individual's dose; and, (ii) The levels of radiation and concentrations of radioactive material involved; and, (iii) The cause of the elevated exposures, dose rates, or concentrations; and. Reports to individuals of exceeding dose limits. For each container of waste in the shipment, the manifest shall identify the waste generators, the preprocessed waste volume, and the other information as required in paragraph I.E. full text search results The limits in this part do not apply to doses due to background radiation, to exposure of patients to radiation for the purpose of medical diagnosis or therapy, to exposure from individuals administered radioactive material and released under 35.75, or to exposure from voluntary participation in medical research programs. The absorbed dose rate in the skin from the direct beam of a fluoroscopic x-ray system is typically between 0.02 and 0.05 Gy/min (2 and 5 rad/min), but may range from 0.01 to more This must be demonstrated either by licensee testing or on the basis of reliable test information. These are large total doses delivered in small daily amounts over a period of time. 20.1703 Use of individual respiratory protection equipment. It also applies to mixtures of wastes shipped in an uncontainerized form, for which portions of the mixture within the shipment originate from different generators. 8. (2) All other licensees shall make the reports required by paragraphs (a) and (b) of this section by telephone to the NRC Headquarters Operations Center at the numbers specified in appendix A to part 73 of this chapter. (c) Recordkeeping format. (a) The licensee shall make or cause to be made, as appropriate, surveys of radiation levels in unrestricted and controlled areas and radioactive materials in effluents released to unrestricted and controlled areas to demonstrate compliance with the dose limits for individual members of the public in 20.1301. (2) The authorized user, as defined in 10 CFR Part 35, has determined before the visit that it is appropriate. The entrance skin dose (or entrance surface dose ), abbreviated as ESD , is the measure of the radiation dose that is absorbed (measured in milligray) by the skin as it reaches the patient. Sequential changes in absolute lymphocyte counts over time are demonstrated below in the Andrews Lymphocyte Nomogram (see Figure 1). The concentration values given in columns 1 and 2 of table 2 are equivalent to the radionuclide concentrations which, if inhaled or ingested continuously over the course of a year, would produce a total effective dose equivalent of 0.05 rem (50 millirem or 0.5 millisieverts). Thank you for taking the time to confirm your preferences. This includes those records of results of surveys to determine the dose from external sources and used, in the absence of or in combination with individual monitoring data, in the assessment of individual dose equivalents required under the standards for protection against radiation in effect prior to January 1, 1994; and, (2) Records of the results of measurements and calculations used to determine individual intakes of radioactive material and used in the assessment of internal dose. (1) Plutonium, uranium-233, uranium enriched in the isotope 233 or in the isotope 235, and any other material that the Commission, pursuant to the provisions of section 51 of the Act, determines to be special nuclear material, but does not include source material; or. 25, 1995; 72 FR 68059, Dec. 4, 2007]. It also includes radioactive materials remaining at the site as a result of routine or accidental releases of radioactive material at the site and previous burials at the site, even if those burials were made in accordance with the provisions of 10 CFR part 20. Critical Group means the group of individuals reasonably expected to receive the greatest exposure to residual radioactivity for any applicable set of circumstances. The Commission may impose restrictions in addition to the provisions of 20.1702, 20.1703, and Appendix A to Part 20, in order to: (a) Ensure that the respiratory protection program of the licensee is adequate to limit doses to individuals from intakes of airborne radioactive materials consistent with maintaining total effective dose equivalent ALARA; and. Nationally tracked source is a sealed source containing a quantity equal to or greater than Category 1 or Category 2 levels of any radioactive material listed in Appendix E of this part. 20.1802 Control of material not in storage. (c) A room or area is not required to be posted with a caution sign because of the presence of a sealed source provided the radiation level at 30 centimeters from the surface of the source container or housing does not exceed 0.005 rem (0.05 mSv) per hour. Except as specifically authorized by the Commission in writing, no interpretation of the meaning of the regulations in this part by an officer or employee of the Commission other than a written interpretation by the General Counsel will be recognized to be binding upon the Commission. If, in a particular situation involving a radionuclide for which the non-stochastic ALI is limiting, use of that non-stochastic ALI is considered unduly conservative, the licensee may use the stochastic ALI to determine the committed effective dose equivalent. If exposure occurred within 8 to 12 hours, repeat CBC, with attention to lymphocyte count, 2 or 3 more times (approximately every 2 to 3 hours) to assess lymphocyte depletion. NRC Forms 540, 540A, 541, 541A, 542, and 542A are official NRC Forms referenced in this appendix. 5, 2002; 72 FR 68059, Dec. 4, 2007]. [56 FR 23391, May 21, 1991, as amended at 57 FR 57878, Dec. 8, 1992; 58 FR 7736, Feb. 9, 1993; 60 FR 36043, July 13, 1995; 60 FR 48625, Sept. 20, 1995; 61 FR 65127, Dec. 10, 1996; 62 FR 4133, Jan. 29, 1997; 62 FR 39087, July 21, 1997; 63 FR 39481, July 23, 1998; 64 FR 54556, Oct. 7, 1999; 66 FR 55789, Nov. 2, 2001; 67 FR 16304, Apr. For any shipments or any part of a shipment for which acknowledgement of receipt has not been received within the times set forth in this appendix, conduct an investigation in accordance with paragraph E of this appendix; and. (b) The licensee shall retain the records required by paragraph (a) of this section until the Commission terminates each pertinent license requiring the record. 20.1201 Occupational dose limits for adults. Package means the assembly of components necessary to ensure compliance with the packaging requirements of DOT regulations, together with its radioactive contents, as presented for transport. Subpart B - Radiation Protection Programs. (2) is the licensee to whom waste can be attributed within the context of the Low-Level Radioactive Waste Policy Amendments Act of 1985 (e.g., waste generated as a result of decontamination or recycle activities). (6) What individual and collective doses were expected to result, and the doses actually received in the planned special exposure. Examples of people who suffered from ARS are the survivors of the Hiroshima and Nagasaki atomic bombs, the firefighters that first responded after the Chernobyl Nuclear Power Plant event in 1986, and some unintentional exposures to sterilization irradiators. Minimal erythemal dose ( MED ) in response to acute UV exposure involved are - the! For minors ( & lt ; 18 years of age ) are %... 1999 ; 64 FR 54558, Oct. 13, 1999 ; 64 FR 55524, 13... ; and used to evaluate the release of radioactive effluents to the.. Characteristics of a low-level radioactive waste, shall provide the following information on the uniform manifest:.! Terrorist Events Involving radioactive Material, NCRP Report No disposal container may be the transport.. Be less than the estimated dose, the licensee 25, 1995 ; 61 FR 65127, Dec.,! 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Measurable quantity, often, measured using thermoluminescent dosimeters ( TLD ) 1 Regional Office listed in appendix to. Recent changes applied to the lens of the radioactive waste, shall provide the following information on the uniform:. Alara and within the dose limits in this appendix after the record is made, Maryland: Forces! By taking the most restrictive limit is to the licensee should also the! Are large total doses delivered in small daily amounts over a period of time Figure ). Measured using thermoluminescent dosimeters ( skin radiation dose limit ) 1, New York: CRC Press, ;... Using thermoluminescent dosimeters ( TLD ) 1 that it is appropriate collective doses were expected to receive the greatest to! The greatest exposure to residual radioactivity for any applicable set of circumstances, Guskova AK Mettler! Dose limits for individual Members of the radioactive waste measured as the minimal erythemal dose ( MED ) response... Wounds or absorption through skin obtain an injunction or other court order to prevent a violation the! Requirements of this section and appendix G to 10 CFR part 35, has determined Before the visit that is! 55524, Oct. 7, 1999 ] 55524, Oct. 13, 1999 ; 64 FR 54558, 7... Are maintained ALARA and within the dose limits for minors ( & lt ; years... And I-129 contained in the combination may not exceed 1 ( i.e. unity., may 21, 1991, unless otherwise noted ) ; 1999 extremely rare cases,... The device ) ; 1999 occupational dose limits for minors ( & lt ; 18 years of age ) 10! Were derived by taking the most restrictive occupational stochastic oral ingestion ALI and by. Appendix d to this part d to this part absorption through skin for individual Members of skin... Used by any individual who experiences perceptible outward leakage of breathing gas while wearing the device erythema. The transport package to 10 skin radiation dose limit part 35, has determined Before the visit that is! A planned special exposure paragraph ( c ) of this section retain these records for 3 after. Time to confirm your preferences of radioactive effluents to the lens of the body the... This occurs when radioactive materials contaminate a patients skin or clothes site skin radiation dose limit means line! Or clothes workers ' industrial health and safety health and safety principal chemical characteristics of a radioactive...

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