|
KMID : 0364920140390010054
|
|
Journal of Radiation Protection and Research
2014 Volume.39 No. 1 p.54 ~ p.60
|
|
|
Performance Test of Portable Hand-Held HPGe Detector Prototype for Safeguard Inspection
|
|
Kwak Sung-Woo
Ahn Gil Hoon
Park Il-jin
Ham Young-Soo
Dreyer Jonathan
|
|
|
Abstract
|
|
|
|
IAEA has employed various types of radiation detectors - HPGe, NaI, CZT - for accountancy of nuclear material.Among them, HPGe has been mainly used in verification activities required for high accuracy. Due to its essential coolingcomponent(a liquid-nitrogen cooling or a mechanical cooling system), it is large and heavy and needs long cooling timebefore use. New hand-held portable HPGe has been developed to address such problems. This paper deals with results ofperformance evaluation test of the new hand-held portable HPGe prototype which was used during IAEA’s inspectionactivities. Radioactive spectra obtained with the new portable HPGe showed different characteristics depending on types andenrichments of nuclear materials inspected. Also, Gamma-rays from daughter radioisotopes in the decay series of 235U and238U and characteristic x-rays from uranium were able to be remarkably separated from other peaks in the spectra. A relativeerror of enrichment measured by the new portable HPGe was in the range of 9 to 27%. The enrichment measurement resultsdidn’t meet partially requirement of IAEA because of a small size of a radiation sensing material. This problem might be solvedthrough a further study.This paper discusses how to determine enrichment of nuclear material as well as how to apply the new hand-held portableHPGe to safeguard inspection. There have been few papers to deal with IAEA inspection activity in Korea to verify accountancyof nuclear material in national nuclear facilities. This paper would contribute to analyzing results of safeguardsinspection. Also, it is expected that things discussed about further improvement of a radiation detector would make contributionto development of a radiation detector in the related field.
|
|
|
KEYWORD
|
|
|
Portable HPGe detector, Nuclear material, Safeguard inspection, Nuclear non-proliferation, Uranium, Enrichment
|
|
|
FullTexts / Linksout information
|
|
|
|
|
|
Listed journal information
|
|
|