Effect of flow pattern in a supersonic nozzle reactor on product branching ratio for UV photolysis of UF6/CH4 mixtures

Kuga, Yoshikazu; Satooka, Sakae; Takeuchi, Kazuo

doi:10.1007/bf01833799

Cited by 1 publication

(1 citation statement)

References 7 publications

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“…노즐의 성능은 수축비(Contraction ratio), 수축각 (Contraction angle), 형상비(Aspect ratio), 입구길이비 (Inlet length ratio)등에 밀접한 영향을 받는다 [7][8][9][10][11]. 노즐설계와 관련된 계산식 및 반 실험식은 다음과 같다.…”

Section: 고압 분사 노즐 설계unclassified

Design of Sludge Washing Apparatus in Steam Generator and Control Method

Kim¹,

Bae²,

Kwon³

2010

The Journal of the Korea Contents Association

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In the case of operating steam generators for long periods in nuclear power plants, sludge is accumulated inside the steam generator. This phenomenon could adversely affect the operation of the steam generator. This paper is about the design of a sludge washing apparatus which can remove the sludge efficiently and the control methods of the apparatus.In this paper, to design the sludge washing apparatus, firstly, we design nozzles for spraying high-pressure water through applying mathematical models and lab tests. Secondly, we establish the mathematical theory for performance parameters required to drive the sludge washing apparatus. Thirdly, we design physical structures of the apparatus based on the established performance parameters. Finally, we present the control methods of the apparatus.The sludge washing apparatus presented in this paper moves along the walls of the steam generator according to cracks in the tube array, and spray the high pressure water to remove the sludge. By this way, a relatively large amount of sludge formed in the inner surfaces can be washed very effectively.■ keyword :|Steam Generator|Sludge Washing Apparatus|High Pressure Spray Nozzle|

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Section: 고압 분사 노즐 설계unclassified