처분 부적합 폐기물이란 원전운영이나 해체 시 처리, 고화 및 포장이 요구되는 방사성폐기물 등을 일컬으며, 대표적으로 분산 특성을 갖는 입자성 방사성폐기물을 예로 들 수가 있다. 이들 폐기물에는 원전 운영과정에서 발생되는 농축폐액의 건조 분말, 슬러리 및 슬러지, 향후 원전 해체과정에서 발생되는 온갖 분말 상태의 폐기물(콘크리트 파쇄물, 제염 슬러지 등), 그리고 제염이 용이치 못한 미세 크기의 방사능오염 토양 등이 있다. 입자성 폐기물을 기존의 고화방식으로 처리할 경우에는 최종 폐기물의 부피가 증가하는 단점을 갖게 되어 처분 비용의 증가 및 처분장의 수용성을 감소하는 결과를 야기할 수가 있 다. 따라서 이들 문제를 해결하고자 본 연구에서는 최종 폐기물 부피의 감용화를 위해 롤 압축 기술을 이용하여 분말의 펠렛화 연구를 수행하였다.

The study of odor generation conditions in urban areas which were outside odor controlled(or management) areas were investigated using the air dilution olfactory method and instrumental analysis in Incheon city. From the study the generation of odor from residential sources and industrial sources was different from region to region. Odor intensity was high in industrial regions in the afternoon, but was low in school regions in urban areas. From the analysis, more effective regional policy suggestions to address different kinds of odor problems in urban areas are proposed.

We compared the results of early follow-up of F-18 FDG PET/CT and MRI performed within one month after radiation therapy for cervix cancer patients. We conducted a retrospective review of the clinical data of cervix cancer patients whose PET/CT and pelvic MRI performed at staging and within one month from the end of RTx. SUVmax on PET/CT and size on MRI of the primary tumor were analyzed. We compared %change of SUVmax and size between staging and follow-up. A total of 27 patients were enrolled. At staging, larger tumor showed high SUVmax. At follow-up, no significant correlation was observed between size and SUVmax. In 77.8% of patients, changes in SUVmax were well correlated with changes in size. No correlation was observed between % change and value at staging in both SUVmax and size. Except for six patients who showed significant FDG uptake without evidence of a mass on MRI, % changes of size and SUVmax were well correlated. Metabolic change can be accessible on early follow-up PET/CT at±1 month from the end of the RTx of cervix cancer. However, careful interpretation of PET/CT is needed due to possible radiation-induced hypermetabolism even without a definite mass on MRI.