Title:
加圧水型原子炉の洗浄方法
Document Type and Number:
Japanese Patent JP4309346
Kind Code:
B2
Abstract:
A method for cleaning steam generating devices of a pressurized water reactor treats the devices on their secondary sides at high pressure and high temperature. An aqueous cleaning solution is employed with EDTA, a reducing agent, and an alkalizing agent. Morpholine is used as the alkalization agent. A molar morpholine-concentration, which is at least as great as the molar concentration of EDTA, is selected. Hydrazine and/or formaldehyde are/is used as the reducing agent at a ratio to EDTA between 1:6 and 1:1.
Inventors:
Bitter, Conrad
Holwedel, Urzula
Schuss, Zirvia
Holwedel, Urzula
Schuss, Zirvia
Application Number:
JP2004530205A
Publication Date:
August 05, 2009
Filing Date:
August 19, 2003
Export Citation:
Assignee:
Areva Empe Gezel Shaft Mitt Beschlenktel Haftung
International Classes:
G21F9/28; B08B7/00; F28G9/00; G21C19/02; G21F9/00; G21F
Domestic Patent References:
| JP60213896A | ||||
| JP63143276A |
Attorney, Agent or Firm:
Iwao Yamaguchi