EP 2264716 A3 20110706 - Decontamination method of heat exchanger and decontamination method
Title (en)
Decontamination method of heat exchanger and decontamination method
Title (de)
Dekontaminierungsverfahren für Wärmetauscher und Dekontaminierungsverfahren
Title (fr)
Procédé de décontamination d'un échangeur thermique et procédé de décontamination
Publication
Application
Priority
JP 2009140819 A 20090612
Abstract (en)
[origin: EP2264716A2] To include a step (Step S13) of flowing air into a heat transfer tube (304), and setting a flow rate (Qp) of abrasive particles to be mixed into air based on a pressure loss between an inlet (304a) side and an outlet (304b) side of the heat transfer tube (304); a step (Step S14) of calculating a permissible grinding time (tA) required until a curved portion (a point A) of the heat transfer tube (304) reaches a permissible grinding thickness based on the flow rate (Qp) of the abrasive particles; and a step (Step S15) of flowing air mixed with the abrasive particles into the heat transfer tube (304) for a time that is a half of the permissible grinding time (tA) and then backwardly flowing air mixed with the abrasive particles into the heat transfer tube (304) for a time that is a half of the permissible grinding time (tA).
IPC 8 full level
CPC (source: EP)
G21F 9/004 (2013.01); G21F 9/005 (2013.01); G21F 9/28 (2013.01)
Citation (search report)
- [AP] JP 2010122076 A 20100603 - MITSUBISHI HEAVY IND LTD
- [A] FR 2586322 A1 19870220 - FRAMATOME SA [FR]
- [A] DE 4306631 A1 19940908 - SIEMENS AG [DE]
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK SM TR
Designated extension state (EPC)
BA ME RS
DOCDB simple family (publication)
EP 2264716 A2 20101222; EP 2264716 A3 20110706; EP 2264716 B1 20141105; JP 2010286374 A 20101224; JP 4796173 B2 20111019
DOCDB simple family (application)
EP 10165462 A 20100610; JP 2009140819 A 20090612