자원리싸이클링 (Resources Recycling)

  • 제26권5호
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  • Pages.97-104
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  • 2017
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  • 2765-3439(pISSN)
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  • 2765-3447(eISSN)
한국자원리싸이클링학회 (The Korean Institute of Resources Recycling)
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BaF2 침전 공정을 통한 폐산세정액 내 Zr 회수 시 잔존 Ba 및 Zr이 산세정에 미치는 영향

The Effects of the Residual Ba and Zr on the Acid Pickling in Case of the Recovering of Zr in Pickling Waste Acid through the BaF2 Precipitation Process

  • 안창모 (한전원자력연료(주)) ;
  • 최정훈 (충남대학교 신소재공학과) ;
  • 한슬기 (한국원자력연구원) ;
  • 박철호 (한전원자력연료(주)) ;
  • 강종원 (한전원자력연료(주)) ;
  • 이영준 (충남대학교 급속응고신소재연구소) ;
  • 이종현 (충남대학교 신소재공학과)
  • An, Chang Mo (KEPCO Nuclear Fuel Company, Ltd. Tube Forming Team) ;
  • Choi, Jeong Hun (Graduate School of Department of Materials Science & Engineering, Chungnam National University) ;
  • Han, Seul Ki (KAERI (Korea Atomic Energy Research Institute)) ;
  • Park, Chul Ho (KEPCO Nuclear Fuel Company, Ltd. Tube Forming Team) ;
  • Kahng, Jong Won (KEPCO Nuclear Fuel Company, Ltd. Tube Forming Team) ;
  • Lee, Young Jun (RASOM, Chungnam National University) ;
  • Lee, Jong Hyeon (Graduate School of Department of Materials Science & Engineering, Chungnam National University)
  • 투고 : 2017.08.30
  • 심사 : 2017.10.17
  • 발행 : 2017.10.31
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초록

핵연료 피복관(지르코늄 합금)은 필거링, 세정, 산 세정 및 열처리공정을 거쳐 만든다. 튜브 표면의 산화층과 불순물을 제거하기 위하여 산 세정(酸 洗淨, Acid pickling) 공정이 요구된다. 이때 산세 공정 중 불산과 질산의 혼합 산(酸) 용액으로부터 용해된 Zr이 농축된 폐산은 중화반응을 거쳐 전량 폐기 처리 된다. 본 연구에서는 $BaF_2$ 침전 공정을 통해 재생산된 산세 용액의 잔존 불순물(Ba)이 산세에 미치는 영향을 관찰하였다. 이와 더불어 실제 핵연료 피복관의 산세 공정에 적합한 재생산 제조를 위한 잔존 Ba 및 Zr의 농도 저감 실험을 실시하여 최적 침전 공정 조건을 도출하였으며, 핵연료 피복관의 산세 공정을 모사한 파일럿 플랜트 산세공정 장치에서 재생산된 산세용액을 사용하여 피복관의 산세 효율을 AFM 분석을 통해 관찰하였다.

Nuclear fuel cladding tubes are manufactured through pilgering and the annealing process. In order to remove the oxidized layer and impurities on the surface of the tube, a pickling process is required. Zirconium (Zr) is dissolved in a HF and $HNO_3$ acid mixture during the process and the pickling waste acid, including the dissolved Zr, is completely discarded after neutralization. This study observes the effects of the residual impurities (Ba) in the pickling solution regenerated from the $BaF_2$ precipitation process on the waste pickling solution. In addition, the concentration of Ba and Zr for the actual nuclear fuel cladding tube process was optimized. The regenerated pickling solution was tested through a pilot plant pickling process device that simulates the commercial pickling process of nuclear fuel cladding tubes, and the pickling efficiency was analyzed through AFM analysis of the roughness of the cladding tube surface.

키워드

참고문헌

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