Dosimetry for high dose applications

Abstract

The calibration and related measurement services of the National Bureau of Standards are intended to assist the makers and users of precision measuring instruments in achieving the highest possible levels of accuracy, quality, and productivity. NBS offers over 300 different calibration, special test, and measurement assurance services. These services allow customers to directly link their measurement systems to measurement systems and standards maintained by MBS. These services are offered to the public and private organizations alike. They are described in NBS Special Publication (SP) 250, NBS Calibration Services Users Guide. The Users Guide is being supplemented by a number of special publications (designated as the "SP 250 Series") that provide a detailed description of the important features of specific NBS calibration services. These documents provide a description of the: (1) specifications for the service; (2) design philosophy and theory; (3) NBS measurement system; (4) NBS operational procedures; (5) assessment of measurement uncertainty including random and systematic errors and an error budget; and (6) internal quality control procedures used by NBS. These documents will present more detail than can be given in an NBS calibration report, or than is generally allowed in articles in scientific journals. In the past NBS has published such information in a variety of ways. This series will help make this type of information more readily available to the user.

Dosimetry and methodology of gamma irradiation for degradation studies on solvent extraction systems

“…In the latter, the spectrum will be degraded because of passing through water and steel. [28] In general, gamma irradiation facilities are used for many purposes: modification of polymers, [29] sterilization in medical applications, [30][31] food preservation [32] and for radiolysis studies on solvents used for reprocessing of spent nuclear fuels. [7, 15-20, 23, 33-38] Also for testing material resistance in general, these facilities prove to be very useful, e.g.…”

ESR dosimeter based on P2O5–CaO–Na2O glass system

“…This is an important requirement for performing proper calibration measurements. Such condition exists when the number and energy of secondary electrons (generated by the primary photons) entering the volume of interest are equal to the number and energy of the secondary electrons leaving this place [31]. In our case the electronic equilibrium was established surrounding the glass samples with 3 mm of lucite TM .…”

Criteria for characterization and performance of a high-dose radiation dosimetry calibraton laboratory

“…Measurement traceability and calibration 5.8.1 All measuring equipment having an effect on the accuracy or validity of calibrations shall be calibrated or verified, or both, before being put into service. The laboratory shall have an established program for the calibration and verification of its measuring equipment [3]. calibration and verification for reference standards.…”

“…5.14. 3 The laboratory shall maintain records of all suppliers from whom it obtains support services or suppHes required for calibrations.…”