Technical Provisions for External Dosimetry

DOE-STD-1098-99

Radiological Control

Radiological Health Support Operations

June 2004

10.

An individual whose dosimeter is lost, damaged, or contaminated should place work in a safe condition, immediately

exit the area, and report the occurrence to the radiological control organization. The individual should be restricted

from entry into radiological areas until a review has been conducted and management has approved reentry.

512 Technical Provisions for External Dosimetry

External dosimetry programs shall be adequate to demonstrate compliance with the Table 2-1 limits [see 10 CFR

835.402(b)]. External dosimetry programs implemented to meet the requirements of Article 511.1 shall be:

Accredited by the DOE Laboratory Accreditation Program for Personnel Dosimetry (DOELAP) [see

835.402(b)(1)]; or

Excepted from accreditation by the DOELAP Program [see 835.402(b)(1)]; or

Otherwise approved by the Assistant Secretary for Environment, Safety and Health [see 835.402(b)(2)].

DOE-STD-1095-95 specifies the requirements for accreditation of personnel external dosimetry monitoring programs

by DOELAP. A technical basis document should be developed and maintained for the external dosimetry program.

Personnel external dosimeters include, but are not limited to, TLDs, track etch dosimeters, film badges, and neutron

sensitive film.

The technical basis document should also address dosimeters monitoring radiation outside the scope of DOELAP,

such as dosimetry associated with high-energy accelerators and extremity dosimeters.

Facilities should participate in inter-comparison studies for external dosimetry programs.

Multiple dosimeters should be issued to individuals to assess deep dose equivalent in non-uniform radiation fields.

Non-uniform radiation fields exist when the dose to a portion of the whole body will exceed the dose to the primary

dosimeter by more than 50 percent and the anticipated whole body dose is greater than 100 millirem. When the

radiation field is well characterized and the worker's orientation is known, relocation of the primary dosimeter is

permitted in lieu of issuance of multiple dosimeters. Under such conditions, the individual's dosimeter should be

relocated to the portion of the whole body likely to receive the highest dose. Dosimeter relocation should be

conducted in conformance with facility procedures or specific work authorizations, such as RWPs. The technical

basis document should describe the methodology used in determining the dose of record when multiple dosimeters

are used and when dosimeters are relocated.

A dose assessment should be performed for each instance of a lost, damaged, or contaminated personnel dosimeter.

Monitoring programs implemented at the discretion of the contractor (i.e., for personnel monitoring that is not

required by Article 511.1) need not be accredited under the DOELAP Program. Programs implemented outside the

scope of the DOELAP Program should include:

Documented assessme nt of each individual's potential occupational dose to support the decision to operate

outside the DOELAP Program. Such assessments should be based upon facility design reviews, the results of

a comprehensive workplace monitoring program, and, if available, the results of previous individual monitoring

results.

Comprehensive routine surveys of areas that may be entered by these individuals to ensure that individual

doses are not likely to exceed the Article 511.1 monitoring thresholds.

513 Pocket and Electronic Dosimeters

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