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NBS (National Bureau of Standards) measurement services: activation-foil irradiation by reactor-cavity fission sources. Special pub

Technical Report ·
OSTI ID:6841712
This document describes the National Bureau of Standards (NBS) calibration service 44090C (formerly 8.1R) which operates in the following way: (i) dosimetry sensors (metal foils, nuclear track detectors, wires, crystals, etc., supplied by the customer or by NBS) are irradiated to a measured neutron fluence in a fission-spectrum neutron field (for short lived reaction products, the samples are irradiated to near saturation and the fluence rate specified); and (ii) the irradiated dosimetry sensors are shipped to the customer, followed by a test report stating the fluences or fluence rates and associated uncertainties. The scope and philosophy of the service, the neutron-field characteristics, irradiation procedures, and the uncertainties in the reported neutron fluences or fluence rates are discussed. Typical maximum fluences are of the order of 3 x 10/sup 15/ neutrons/sq cm, with combined (1 omega) uncertainties of + or - 2 %.
Research Organization:
National Bureau of Standards, Washington, DC (USA). Center for Radiation Research
OSTI ID:
6841712
Report Number(s):
PB-88-217435/XAB; NBS/SP-250/14
Country of Publication:
United States
Language:
English