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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2017.6
- 수록면
- 668 - 674 (7page)
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초록· 키워드
오류제보하기
Experimental verification of boron species in fuel CRUD (Chalk River Unidentified Deposit) would provideessential and important information about the root cause of CRUD-induced power shifts (CIPS). Todate, only bonaccordite and elemental boron were reported to exist in fuel CRUD in CIPS-troubledpressurized water reactor (PWR) cores and lithium tetraborate to exist in simulated PWR fuel CRUDfrom some autoclave tests. We have reevaluated previous analysis of similar threadlike crystals alongwith examining some similar threadlike crystals from CRUD samples collected from a PWR cycle that hadno indications of CIPS. These threadlike crystals have a typical [Ni]/[Fe] atomic ratio of ~2 and similarcrystal morphology as the one (bonaccordite) reported previously. In addition to electron diffractionstudy, we have applied electron energy loss spectroscopy to determine boron content in such a crystaland found a good agreement with that of bonaccordite. Surprisingly, such crystals seem to appear also oncorroded surfaces of Alloy 600 that was exposed to simulated PWR primary water with a dissolvedhydrogen level of 5 mL H2/kg H2O, but absent when exposed under 75 mL H2/kg H2O condition. It remainsto be verified as to what extent and in which chemical environment this phase would be formed inPWR primary systems.
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참고문헌 (14)
참고문헌 신청
J. A. Sawicki / 1988 / Callaway Cycle 9 as they relate to the severe AOA observed for this core / J. Nucl. Mater 374:249~269
J. A. Sawicki / 2010 / Analyzes of crud deposits on fuel rods in PWRs using M€ossbauer spectroscopy / J. Nucl. Mater 402:24~129
J. A. Sawicki / 2012 / Electron diffraction on bonaccordite Ni2FeBO5 particles formed on fuel pins in PWRs / J. Nucl. Mater 424:277~278
J. Chen / 2014 / Characterization of fuel deposits from Ringhals unit 4 / Presented at International Conference on Water Chemistry of Nuclear Reactor Systems
B. Bengtsson / 2014 / Precipitation of iron species on the cold side of PWR steam generator and its possible correlation to dose rate elevation / Presented at International Conference on Water Chemistry of Nuclear Reactor Systems
J. A. Sawicki / 2010 / Analyzes of crud deposits on fuel rods in PWRs using M€ossbauer spectroscopy / J. Nucl. Mater 402:24~129
J. A. Sawicki / 2012 / Electron diffraction on bonaccordite Ni2FeBO5 particles formed on fuel pins in PWRs / J. Nucl. Mater 424:277~278
J. Chen / 2014 / Characterization of fuel deposits from Ringhals unit 4 / Presented at International Conference on Water Chemistry of Nuclear Reactor Systems
B. Bengtsson / 2014 / Precipitation of iron species on the cold side of PWR steam generator and its possible correlation to dose rate elevation / Presented at International Conference on Water Chemistry of Nuclear Reactor Systems
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