| (4) The registrant shall ensure that in facilities utilizing both radiation producing machines and radioactive materials, the TEDE to an individual member of the public shall not exceed 0.1 rem (1 mSv) in 1 year. (p) Compliance with dose limits for individual members of the public. (1) The registrant shall make or cause to be made surveys of radiation levels in unrestricted areas to demonstrate compliance with the dose limits for individual members of the public as required in subsection (o) of this section. (2) A registrant shall show compliance with the annual dose limit in subsection (o) of this section by demonstrating by measurement or calculation that the TEDE to the individual likely to receive the highest dose from the registered operation does not exceed the annual dose limit. (3) Registrants exempt from individual monitoring requirements in accordance with subsection (n)(2) of this section are exempt from the requirements of paragraphs (1) and (2) of this subsection. (q) Location and use of individual monitoring devices. (1) Each registrant shall ensure that individuals who are required to monitor occupational doses in accordance with subsection (n)(l) of this section wear and use individual monitoring devices as follows. (A) An individual monitoring device shall be assigned to and worn by only one individual. (B) 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. When a protective apron is worn, the location of the individual monitoring device is typically at the neck (collar). (C) If an additional individual monitoring device is used for monitoring the dose to an embryo/fetus of a declared pregnant woman, in accordance with subsection (n)(1)(C) of this section, it shall be located at the waist under any protective apron being worn by the woman. (D) An individual monitoring device used for monitoring the LDE, to demonstrate compliance with subsection (m)(1)(B)(i) of this section, shall be located at the neck (collar) or at a location closer to the eye, outside any protective apron being worn by the monitored individual. (E) An individual monitoring device used for monitoring the dose to the extremities, to demonstrate compliance with subsection (m)(1)(B)(ii) of this section, shall be worn on the extremity likely to receive the highest exposure. Each individual monitoring device, to the extent practicable, shall be oriented to measure the highest dose to the extremity being monitored. (2) Each registrant shall ensure that individual monitoring devices are returned to the dosimetry processor for proper processing. (3) Each registrant shall ensure that adequate precautions are taken to prevent a deceptive exposure of an individual monitoring device. (r) Determination of occupational dose for the current year. (1) For each individual who is likely to receive, in a year, an occupational dose requiring monitoring in accordance with subsection (n) of this section, the registrant shall determine the occupational radiation dose received during the current year. Occupational dose includes doses received from exposure to registered/licensed or unregistered/unlicensed sources of radiation as defined in subsection (c) of this section. (2) In complying with the requirements of paragraph (1) of this subsection, a registrant may: (A) accept, as a record of the occupational dose that the individual received during the current year, RC Form 231-3 from prior or other current employers, or other clear and legible record, of all information required on that form and indicating any periods of time for which data are not available; or (B) 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 prior or other current employer(s) for work involving radiation exposure, that discloses the nature and the amount of any occupational dose that the individual received during the current year; or (C) obtain reports of the individual's DE from prior or other current employer(s) for work involving radiation exposure, or the individual's current employer, if the individual is not employed by the registrant, by telephone, telegram, facsimile, or letter. The registrant shall request a written verification of the dose data if the authenticity of the transmitted report cannot be established. (3) The registrant shall record the exposure data for the current year, as required by paragraph (1) of this subsection, on RC Form 231-3, or other clear and legible record, of all the information required on RC Form 231-3. (4) If the registrant is unable to obtain a complete record of an individual's current occupational dose while employed by any other registrant or licensee, the registrant shall assume in establishing administrative controls in accordance with subsection (m)(6) of this section for the current year, that the allowable dose limit for the individual is reduced by 1.25 rems (12.5 millisieverts (mSv)) for each quarter; or 416 millirems (mrem) (4.16 mSv) for each month for which records were unavailable and the individual was engaged in activities that could have resulted in occupational radiation exposure. (5) If an individual has incomplete (for example, a lost or damaged personnel monitoring device) current occupational dose data for the current year and that individual is employed solely by the registrant during the current year, the registrant shall: (A) assume that the allowable dose limit for the individual is reduced by 1.25 rems (12.5 mSv) for each quarter; (B) assume that the allowable dose limit for the individual is reduced by 416 mrem (4.16 mSv) for each month; or (C) assess an occupational dose for the individual during the period of missing data using surveys, radiation measurements, or other comparable data for the purpose of demonstrating compliance with the occupational dose limits. (6) Administrative controls established in accordance with paragraph (4) of this subsection shall be documented and maintained for inspection by the agency. Occupational dose assessments made in accordance with paragraph (5) of this subsection and records of data used to make the assessment shall be maintained for inspection by the agency. The registrant shall retain the records in accordance with subsection (ll)(6) of this section. (s) General surveys and monitoring. (1) Each registrant shall make, or cause to be made, surveys that: (A) are necessary for the registrant to comply with this section; and (B) are necessary under the circumstances to evaluate: (i) the magnitude and extent of radiation levels; and (ii) the potential radiological hazards. (2) The registrant shall ensure that instruments and equipment used for qualitative and quantitative radiation measurements, for example, dose rate, are operable and calibrated: (A) by a person licensed or registered by the agency, another agreement state, a licensing state, or the NRC to perform such service; (B) at intervals not to exceed 12 months unless a different time interval is specified in another section of this chapter; (C) after each instrument or equipment repair; (D) for the types of radiation used and at energies appropriate for use; and (E) at an accuracy within 20% of the true radiation level. (3) All individual monitoring devices, except for direct and indirect reading pocket dosimeters, electronic personal dosimeters, and those individual monitoring devices used to measure the dose to any extremity, that require processing to determine the radiation dose and that are used by registrants to comply with subsection (m) of this section, with other applicable provisions of this chapter, shall be processed and evaluated by a dosimetry processor: (A) holding current personnel dosimetry accreditation from the National Voluntary Laboratory Accreditation Program (NVLAP) of the National Institute of Standards and Technology; and (B) approved in this accreditation process for the type of radiation or radiations included in the NVLAP program that most closely approximates the type of radiation or radiations for which the individual wearing the dosimeter is monitored. (t) Control of access to high radiation areas. (1) The registrant shall ensure that each entrance or access point to a high radiation area has one or more of the following features: (A) 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 DDE of 0.1 rem (1 mSv) in one hour at 30 cm from the source of radiation from any surface that the radiation penetrates; Cont'd... |
