A paradigm shift in the government’s energy policy was reflected in its declaration of early closure of old nuclear plants as well as cancellation of plans for the construction of new plants. To this end, unit 1 of Kori Nuclear Power Plant was permanently shut down and is set for decommission. Based on these changes, the off-site transport of spent fuels from nuclear power plants has become a critical issue. The purpose of this study is to develop an optimized method for transportation of spent fuels from Kori Nuclear Power Plant’s units 1, 2, 3, and 4 to an assumed interim storage facility by simulating the scenarios using the Flexsim software, which is widely used in logistics and manufacturing applications. The results of the simulation suggest that the optimized transport methods may contribute to the development of delivery schedule of spent fuels in the near future. Furthermore, these methods can be applied to decommissioning plan of nuclear power plants.

Caloptilia Hübner, 1825 is one of the largest genera in Gracillariidae. 314 species have been known around the world. To date, 19 species were known from Korea. In the present study, one species, C. acericola (Kumata, 1966), is newly recognized from South Korea. Caloptilia acericola was first described from Japan and it also distribute Russian Far East. The name of this species was derived from the genus name (Acer, Aceraceae) of its host plant. We redescribed with illustrations of adults and genitalic structures to distinguish the species from the congeneric species in South Korea.

In the present study we report a newly recognized crambid species, Sinibotys butleri (South, 1901). Previously, two species, S. evenoralis and S. obliquilinealis, were known from Korea, but now they are belonged to a genus Torulisquama Zhang, 2010, that was newly erected in a recent study. Sinibotys differs from Torulisquama by having: forewing 36－47.5 mm in length and without unscaled areas; male with transtilla covered with setae and editum bearing dense setae; female with ductus bursae relatively broad and short; corpus bursae and signum much larger. We update taxonomic position of these three species accordingly and compare Sinibotys and Torulisquama morphologically. A Key to species, description of adult, male and female genitalia structures are provided with available information such as collection locality, host plant and distribution range for the species.

Recently, two strains of a novel enterohepatic Helicobacter species, H. equorum, were isolated from fecal samples of two clinically healthy horses in Belgium. The purpose of the present study was to detect the presence of H. equorum infection in fecal samples of adult horses from Jeju Island using polymerase chain reaction (PCR). A total of 86 fecal samples from 31 clinically healthy Thoroughbred horses and 55 horses native to the Jeju Island were evaluated. H. equorum DNA was detected in 10.9% (6/55) of the native-horses, while all the Thoroughbred horses showed negative PCR results. Ages of the H. equorum DNA-positive horses ranged from 2 to 4 years old. To the best of our knowledge, this is the first study of H. equorum detection in fecal samples from horses in Korea.

The species composition of the parasitoid complex and the degree of parasitism by each species were analyzed for Ivela auripes Butler (Lepidoptera, Lymantridae) populations in the increasing phase. Total of 2,177 eggs, larvae and pupae were collected and reared from the Gwangneung forest Pocheon-si, Korea. The most abundant parasitoids from each developmental stage were: a trichogrammatid wasp (Trichogramma kurosuae) from eggs, a braconid wasp (Cotesia melanoscela) from larvae, an ichneumonid wasp (Pimpla disparis) and a tachinid fly (Tachinidae sp.1), each from pupae. 19 other parasitoids, mostly hyperparasitoids, also occurred including Tachinidae sp.2, Pteromalidae sp.1, Ichneumonidae sp.3, and Apechthis capulifera. Illustrations and a list of the species parasitizing of I. auripes are provided.

In the present study, we report two lepidopteran pests on the cones of Abies koreana E. H. Wilson; Cydia sp. of Tortricidae and Dioryctria abietella Denis et Schiffermüller of Pyralidae. Larvae of these species bored tunnels inside the immature cones of the host plant. Damaged cones are easy to spot by reddish brown excretion from the pest entry holes, and the cones severly damaged by the larvae becomes crooked. Damage rate on the cones reached up tp 71% from the collection site. Regarding the two pests, some basic information such as collection records, morphological characters, and ecology were provided.

지하 동굴식 처분장의 건설, 운영 및 중-저준위 방사성폐기물을 처분한 이후 발생하게 되는 오염물질(Rn, CH CO, HS, Radiolysis에 의한 방사능 가스 등)은 적절한 공기량을 필요로 한 곳에 정확히 분배시킬 수 있는 환기시스템에 의해 통제되도록 하여야한다. 특히 지하 처분장은 여러 개의 진입 터널, 저장 터널, 공기 유입-배기 터널, 수직갱 등으로 이루어진 복잡한 회로망의 형태로 나타나기 때문에 이에 적절한 기술적 접근이 필요하다. 본 논문에서는 이러한 환기시스템 구축을 위한 기술적 접근을 위해 미국의 WIPP (Waste Isolation Pilot Plant)처분장과 스웨덴의 SFR (Slutforvar for Reaktoravfall) 중-저준위 처분장을 모델로 하여 두 처분장의 소요환기량을 선정하고 설계상 통풍로의 단면적, 길이, 표면 거칠기 등을 고려한 환기회로를 구성하였으며, 수학적으로 계산되는 각 회로의 저항에 대해 기술하였다. 또한 이를 바탕으로 적절한 선풍기의 용량과 수직갱 운용방안을 설계하였다. 두 처분장의 지형상의 규모 및 환기시설 비교 결과, SFR 처분장에 비해 WIPP 처분장에서와 같이 병렬구조가 많을수록 처분장 전체의 저항이 감소되며 이러한 결과로 환기시스템의 운용비 절감효과를 얻을 수 있다는 결론을 얻었다. 따라서 처분용량 증대를 위한 대단면의 SFR 처분장 구조와 전체 저항 감소를 위한 WIPP 처분장의 병렬구조를 조합한 형태가 가장 합리적이며 효율적인 환기가 이루어질 수 있을 것으로 사료된다.