Studies on the analyses for the scale of FGD process |
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Authors: | Email author" target="_blank">Kyeongsook?KimEmail author Sukran?Yang Haeran?Song Heemoon?Eum |
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Affiliation: | (1) Radiation & Environment Group, Nuclear Power Laboratory, KEPRI, 103-16, Munji, Yusung, 305-345 Daejeon, Korea |
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Abstract: | During the period of preventive maintenance of the Ulsan power plant, the scale was sampled from riser pipes, sparger pipes
and other important parts in the FGD facilities. Various analyses such as concentration analysis, surface morphology, and
crystal structure have been performed on the scale sample. The riser pipe scale was a gypsum dihydrate form. The sparger pipe
scale was different from two units, namely, gypsum dihydrate form was obtained from that of unit 6; on the other hand, 1 to
1 ratio of gypsum dihydrate form and anhydrate form was elucidated from that of unit 4. Next, the analyses of GCP spray nozzle
head scale, gas-cooling zone scale, and BUF inlet duct scale were focused on the effect of base material. On the basis of
the analytical results, we expect to elucidate the formation process of the scale, and finally to improve the FGD process. |
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Keywords: | FGD Scale Sparger Pipe Riser Pipe GCP Spray Nozzle Head Gas-Cooling Zone |
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