Journal of the Korean Society for Nondestructive Testing (비파괴검사학회지)

The Korean Society for Nondestructive Testing (한국비파괴검사학회)
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Development of $^{169}Yb$ Low-Energy Sealed Source for Nondestructive Testing Applications Utilizing HANARO

하나로를 이용한 비파괴검사용 $^{169}Yb$ 저에너지 밀봉선원 개발

  • Published : 2008.02.28
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Abstract

[ $^{169}Yb$ ] industrial NDT sealed sources were developed by using $Yb_2O_3$ pellets as the target and demonstrated for their performance. To produce the pellets, optimal compacting and sintering conditions were determined experimentally. Source holders for $^{169}Yb$ were designed and fabricated. After assembling an active source produced from HANARO with the developed source holder, a demonstration experiment was performed to compare the quality of the radiographs from $^{192}Ir$ and soft X-rays. This demonstration study showed that the developed $^{169}Yb$ produced better radiographs than $^{192}Ir$ for a carbon steel with less than a 4 mm thickness.

본 연구에서는 하나로 및 동위원소생산시설을 활용하여 비파괴 검사에 사용되는 $^{169}Yb$ 선원의 생산 기술을 개발하였다. 천연 존재비 0.14%의 $^{168}Yb$ 을 20% 까지 농축한 $Yb_2O_3$ 분말을 표적물질로 사용하였고 이 물질의 방사화를 위하여 펠릿 성형기술 및 장치를 개발하였다. 중성자 조사를 위한 표적캡슐 및 기존 $^{192}Ir$ 선원 조사기에 사용이 가능한 선원 어셈블리를 설계 제작하였다. 또한, 하나로를 이용하여 약 5 Ci의 방사능 강도를 갖는 시험용 선원을 제작하여 $^{192}Ir$ 선원과 비파괴검사 성능을 비교 평가하여 선원의 우수함을 확인하였고 선원캡슐의 안전성시험을 실시하여 캡슐의 안전성을 검증하였다.

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References

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