Radioactive waste is typically disposed of using standard 200 and 320 L drums based on acceptance criteria. However, there have been no cases evaluating the disposal and suitability of 200 L steel drums for RI waste disposal. There has been a lack of prior assessments regarding the disposal and suitability of 200 L steel drums for the disposal of RI waste. Radioactive waste is transported to disposal facilities after disposal in containers, where the drums are loaded and temporarily stored. Subsequently, after repackaging the disposal drums, the repackaged drums are transported to disposal facilities by vehicle or ship for permanent disposal. Disposal containers can be susceptible to damage due to impacts during transportation, handling, and loading, leading to potential damage to the radiation primer coating during loading. Additionally, disposal containers may be subject to damage from electrochemical corrosion, necessitating the enhancement of corrosion resistance. Metal composite coatings can be employed to enhance both abrasion resistance and corrosion resistance. The application of metal composite coatings to disposal containers can improve the durability and radiation shielding performance of radioactive waste disposal containers. The thickness of radioactive waste disposal containers is determined through radioactive shielding analysis during the design process. The designed disposal containers undergo structural analysis, considering loading conditions based on the disposal environment. This paper focuses on evaluating the structural improvements achieved through the implementation of metal composite coatings with the goal of enhancing corrosion and abrasion resistance.

목적 : 천연 항균, 항산화 물질인 망고스틴의 크산톤 화합물로 코팅된 콘택트렌즈를 제조하여 안과적 질환 예 방을 위한 기능성 콘택트렌즈의 물리·화학적 특성을 연구하였다. 방법 : 콘택트렌즈를 제조하여 IPN기술을 통해 감마망고스틴을 코팅하였다. 제조된 렌즈를 ISO와 식약처기준 을 참고하여 광투과율, 함수율, 산소투과율(Dk/t), 항균, 항산화성 실험을 진행하였다. 결과 : 감마망고스틴 코팅 콘택트렌즈의 가시광선투과율은 93%이다. 자외선은 70% 이상 청광은 30% 이상 차 단한다. 항균 실험에서는 감마망고스틴 코팅 콘택트렌즈의 항균성이 일반렌즈에 비해 5배 이상 효과 있고, 항산화 는 시험별 17.49, 28.46, 36.99%의 항산화율을 보였다. 결론 : 감마망고스틴으로 코팅된 콘택트렌즈는 UV와 청광의 차단율이 일반렌즈에 비해 매우 뛰어나다. 또한, 일반렌즈에 없는 항균, 항산화 활성을 보여 안과적 질환을 예방할 수 있을 것으로 보인다.

Flammulina velutipes belonging to white rot fungi is one of the commercially important edible mushrooms and is produced in large quantities due to the introduction of a automated and mechanized cultivation system in Korea. Despite the chief item of export among edible mushrooms, Flammulina velutipes has the lowest distribution rate of domestic cultivar, estimated that about 20 percent. As the result that most white cultivars of Flammulina velutipes produced and exported in Korea were introduced from Japan, farmers pay a large amount of royalties. Therefore, we try to develop a new pure domestic cultivars as a substitute for Japanese cultivars. To breed both white and gold superior strains, we selected the crossing mother groups including 10 white strains of ASI 4198 etc. and 7 brown strains of ASI 4049 etc. and mated each of the 17 strains by mon-mon hybridization. 19 white and 14 brown strains were chosen through two selection experiment over 2014 2016. In the third selection experiment this year, we finally selected one white(Fv 16 c 37) and the other gold(Fv 15 a 31) strain. Two selected strains were cultivated in the same environmental conditions. Spawn running period on the sawdust substrate required 30days at 20°C. The cultivation period and optimum temperature were 12±1 days at 14°C for primordia formation, 5 days at 4°C for inhibition phase, and 14±1 days at 7°C for fruiting body development. The length of pilei and stipes in two selected strains and Megumi as a control Japanese cultivar harvested in optimal stage was as follows: 10.5±0.81mm and 139.7±4.23mm in Fv 16 c 37, 10.8±0.43mm and 128..2±7.31mm in Fv 15 a 31, and 10.9±0.41mm and 141.8±4.64mm in Megumi respectively. The Yield of Fv 16 c 37, Fv 15 a 31 and Megumi was 271.2±11.84g, 237.7±9.05g and 270.7±16.87g per 1100ml in bottle cultivation.

The production scale of mushroom cultivation in Korea is approximately 600 billion won, which is 1.6% of the Korean gross agricultural output. Annually, ca. 190,000 tons of mushrooms are harvested in Korea. The oyster mushroom is one of the most favorite and commonly consumed mushrooms in Korea. In case of breeding, the protoplast fusion technique of the oyster mushroom, P. ostreatus was first commercialized in the world. To develop the high temperature varieties, various examinations were accomplished. Protoplast fusion of abalone mushroom, high temperature, and oyster mushroom, popular mushroom, were attempted. 2 strains of P.ostreatus and 2 strains of P.abalonus were fused to each other by protoplast isolation. Fusion strains were investigated by random amplified polymorphic DNA(RAPD) marker, and selected strains were cultivated at 25°C after completing the mycelial growth. As a result of sawdust bag cultivation, most of strains showed the fruiting body, but the morphological characteristics among them were not significant different. However, these protoplast fusion strains were expected as new parents strains to develop varieties.

‘Baekseung’, a new variety of Flammulina velutipes, was bred by mating two monokaryotic strains isolated from KMCC 4210 and KMCC 4216 in Mushroom Research Division, Baekseung ARES in 2016. Baekseung showed fast mycelial growth and high mycelial density on MEA (Malt Extract Agar) media for 7days of incubation. Spawn running period on the sawdust substrate required 30days at 25°C. The cultivation period and optimum temperature were 11±1 days at 14°C for primordia formation and 14±1 days at 7°C for fruiting body development. The length of pilei and stipes in Baekseung harvested in optimal stage exhibited 11.3±0.4㎜ and 89.2±7.1㎜ and Megumi harvested in optimal stage showed 8.2±1.0㎜ and 95.9±5.0㎜ respectively. Yield of Baekseung and Megumi strain grown of sawdust substrate was 153.7±12.5g and 150.5±29.7g per 850ml in bottle cultivation. The inferred tree exhibited the difference of phylogenetic relationship between the Korean white fruiting body strains such as Baekseung, Uri1ho, Fv-14-a-38, and Fv-14-a-51 and the Japanese white fruiting body strain Megumi.