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Kafe 바로가기주관연구기관 | 한국원자력연구원 Korea Atomic Energy Research Institute |
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연구책임자 | 최왕규 |
참여연구자 | 양한범 , 원휘준 , 정종헌 , 박상윤 , 문제권 , 황두성 , 윤석본 , 김선병 , 윤인호 , 이기원 , 맹완영 , 김창기 , 박정순 , 이우성 , 정준영 , 김초롱 |
보고서유형 | 1단계보고서 |
발행국가 | 대한민국 |
언어 | 한국어 |
발행년월 | 2015-05 |
과제시작연도 | 2014 |
주관부처 | 미래창조과학부 Ministry of Science, ICT and Future Planning |
등록번호 | TRKO201800009466 |
과제고유번호 | 1711011702 |
사업명 | 원자력기술개발사업 |
DB 구축일자 | 2018-05-26 |
키워드 | 화학제염.일차계통제염.분해처리.나노복합유체.거품 제염.거품 안정성.실리카 나노입자.chemical decontamination.primary system decontamination.decomposition.foam decontamination.foam stability.silica nanoparticle. |
DOI | https://doi.org/10.23000/TRKO201800009466 |
1. 연구개발 목표 및 내용
원자력시설 일차계통 및 대형기기 화학제염 시스템 개발
- 원자력발전소 일차계통 무착화성 화학제염 시스템 개발
- 원자력시설 대형기기 나노복합유체제염 시스템 개발
2. 연구결과
• 원전 일차계통 무착화성 화학제염 공정(HYBRID & HYBRID-D) 개발
- 기존의 유기산 기조의 화학물질을 배제하고 환원성 물질 N2H4 과 Cu+/2+ 금속 촉매효과를 이용한 N2H4/
1. 연구개발 목표 및 내용
원자력시설 일차계통 및 대형기기 화학제염 시스템 개발
- 원자력발전소 일차계통 무착화성 화학제염 시스템 개발
- 원자력시설 대형기기 나노복합유체제염 시스템 개발
2. 연구결과
• 원전 일차계통 무착화성 화학제염 공정(HYBRID & HYBRID-D) 개발
- 기존의 유기산 기조의 화학물질을 배제하고 환원성 물질 N2H4 과 Cu+/2+ 금속 촉매효과를 이용한 N2H4/HNO3/Cu+ 계 무착화성 화학제염제 HYBRID(HYdrazine Base Reductive metal Ion Decontamination)를 개발하였음.
- PWR 조건에서 운전한 FTL 인출 시편의 NP-HYBRID 다단계 화학제염을 통해 매우 우수한 제염성능(제염계수>1,000) 및 대규모 계통 적용성 검증
• 대형기기 및 대면적 제염을 위한 나노복합유체 제염 기술 확보
- 상용실리카 함유 복합유체 제염제에 비해 거품 안정성과 제염성능이 향상된 자체 개발한 용매추출 메조다공성 실리카 함유 복합유체 제염제를 개발하였음
- 서울연구용 원자로 시편에 나노복합유체 제염 기술을 실증함으로써 (DF>10) 국내 원자력 대면적/대형기기 시설 해체에 대비한 제염 원천 기술을 확보하였으며, 제염시 발생하는 이차폐기물의 양을 현저히 저감 예상
(출처 : 보고서 요약서 5p)
Ⅳ. Results and Proposal for Application
1. Development of chelating reagent-free chemical decontamination system for the primary coolant system of nuclear power plants
A new chemical decontamination agent with no use of organic acid or organic chelating agents was developed in KAERI. The c
Ⅳ. Results and Proposal for Application
1. Development of chelating reagent-free chemical decontamination system for the primary coolant system of nuclear power plants
A new chemical decontamination agent with no use of organic acid or organic chelating agents was developed in KAERI. The chemical decontamination agent is composed of hydrazine as a reducing agent, metal ion of Cu2+/Cu+ as a catalyst and inorganic acids such as HNO3 or H2SO4 as a H+ ion donator. This agent was named HYBRID(HYdrazine Based Reductive metal Ion Decontamination) which is the attribute of reducing decontamination agent. With the series of dissolution experiments form magnetite powder, metal oxides (e.g. type 304 stainless steel and Inconel 600) produced under the condition simulating the pressure and temperature of operating reactors and radioactive specimens extracted from operating commercial or research reactor, the dissolution performance of metal oxides and decontamination capability of radionuclides from the specimens have been proven and the optimal composition of chemical agents was derived. Especially the decontamination factor obtained from the FTL(Fuel Test Loop of HANARO research reactor) was exceeded 200, which demonstrated the decontamination performance.
HYBRID decontamination agent was devised to generate less amount of the secondary waste due to the total decomposition of hydrazine into nitrogen and water. To prove this concept, we treated decontamination liquid waste by adding hydrogen peroxide continually not all at once, and confirmed the total decomposition was reached to 100% when the addition of hydrogen peroxide was 30% to the volume of liquid waste.
Besides, HYBRID decontamination agents was claimed highly resistive against the radioactivity which must be inevitably experienced during the decontamination around the reactor vessel. Comparison with other agents used in commercial decontamination technologies such as CAN-DEREM or CORD under 10,000Gy radioactivity supported that HYBRID agents is four fold resistive than other methods with the lowest 6.8 % decomposition but 33 and 45 % for other agents of EDTA and oxalic acid respectively.
2. Development of complex-fluid decontamination system containing nanoparticle for large components of nuclear facilities
Decyl glucoside having a higher foam stability was selected as main surfactant components compared to conventional nonionic surfactant, and mesoporous silica nanoparticles was determined for stabilizer among various silica nanoparticle structures such as mesoporous, core-shell and non-porous structures to increase foam stability. The mesoporous silica nanoparticles prepared by HCl-EtOH solvent extraction were developed by KAERI, featuring to the excellent dispersion and foam stability. The foam decontamination agents containing KAERI silica nanoparticles which has 20% higher foam stability and decontamination efficiency than that of conventional nanoparticles based foaming agents, show high DF over 10 from the demonstration test using contaminated components in KAERI Research Reactor. From above R&D project, the fundamental results concerning the foam decontamination technology has been established to apply to the large components of nuclear facilities.
(출처 : SUMMARY 13p)
과제명(ProjectTitle) : | - |
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연구책임자(Manager) : | - |
과제기간(DetailSeriesProject) : | - |
총연구비 (DetailSeriesProject) : | - |
키워드(keyword) : | - |
과제수행기간(LeadAgency) : | - |
연구목표(Goal) : | - |
연구내용(Abstract) : | - |
기대효과(Effect) : | - |
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