Management of nickel-based alloy butt welds in the reactor coolant system of Belgian NPPs
Research output: Contribution to report/book/conference proceedings › In-proceedings paper
Institutes & Expert groups
- Tractebel - Engie
- Kerncentrale DOEL NPP - ENGIE Electrabel
Documents & links
Abstract
Following the occurrence of PWSCC events in RPV outlet nozzles welds in V.C. Summer and Ringhals
3 and 4 NPPs in 2000, ENGIE Electrabel set up an enhanced ISI program specifically dedicated to RPV
and pressurizer nozzles butt welds made of nickel-based alloy 182 in Doel 3-4 and Tihange 2-3 PWR
units. Specific non-destructive examinations (NDE) carried out in this framework at an increased frequency
did not reveal any PWSCC indications but some non-growing sub-surface indications have been
detected. It was then decided to mitigate the risk of PWSCC in all pressurizer nozzles butt welds made
of nickel-based alloy 182.
The paper summarizes the strategy implemented by ENGIE Electrabel to manage the risk of PWSCC
in those butt welds.
Details
| Original language | English |
|---|---|
| Title of host publication | Contribution of Materials Investigations and Operating Experience to Light Water NPPs’ Safety, Performance and Reliability |
| Publisher | Unknown |
| Pages | 1-9 |
| Number of pages | 9 |
| Publication status | Published - 17 Sep 2018 |
| Event | 2018 - FONTEVRAUD 9 - Palais des Papes, Avignon , France Duration: 17 Sep 2018 → 20 Sep 2018 http://www.sfen-fontevraud9.org/ |
Conference
| Conference | 2018 - FONTEVRAUD 9 |
|---|---|
| Country | France |
| City | Avignon |
| Period | 2018-09-17 → 2018-09-20 |
| Other | Contribution of Materials Investigations and Operating Experience to LWRs’ Safety, Performance and Reliability |
| Internet address |
Keywords
- Nickel-based alloy, Pressurizer, Reactor Pressure Vessel, Structural Weld Overlay
ID: 4740252