Aller au contenu principal
  • Paul Scherrer Institut PSI
  • PSI Research, Labs & User Services

Digital User Office

  • Digital User Office
  • DE
  • EN
  • FR
Paul Scherrer Institut (PSI)
Rechercher
Paul Scherrer Institut (PSI)

Hauptnavigation

  • Research at PSIOuvrir ce point de menu principal
    • Research Initiatives
    • Ethics and Research integrity
    • Scientific Highlights
    • Scientific Events
    • Scientific Career
    • PSI-FELLOW
    • PSI Data Policy
  • Research Divisions and LabsOuvrir ce point de menu principal
    • Overview
    • Research with Neutrons and Muons
    • Photon Science
    • Energy and Environment
    • Nuclear Energy and Safety
    • Biology and Chemistry
    • Scientific Computing, Theory and Data
    • Large Research Facilities
  • Facilities and InstrumentsOuvrir ce point de menu principal
    • Overview
    • Large Research Facilities
    • Facilities
    • PSI Facility Newsletter
  • PSI User ServicesOuvrir ce point de menu principal
    • User Office
    • Methods at the PSI User Facilities
    • Proposals for beam time
    • Proposal Deadlines
    • Data Analysis Service (PSD)
    • EU support programmes
  • New ProjectsOuvrir ce point de menu principal
    • SLS 2.0
    • IMPACT
  • DE
  • EN
  • FR

Digital User Office (mobile)

  • Digital User Office

Vous êtes ici:

  1. PSI Home
  2. Labs & User Services
  3. NES
  4. LNM
  5. Research Programs
  6. Materials Ageing & Structural Integrity
  7. PARENT

Navigation secondaire

Laboratory for Nuclear Materials

  • About LNM
  • Events
  • Organisation / People
  • Research Programs Sous-menu élargi
    • Advanced Nuclear Materials
    • Nuclear Fuels
      • H-Uptake
      • Cladding Mechanics
      • Fuel Burn-Up
      • Cross-Cut Synchrotron
    • Materials Ageing & Structural Integrity Sous-menu élargi
      • ZINC
      • PLiM
      • PROBAB
      • SAFE
      • DIAGNOSTICS
      • Helium Effects on IASCC
      • PARENT
      • NORA
      • CPFEM
  • Experimental Facilities
    • Hotlab
    • Hydrogenation
    • SINQ Target Irradiation Program (STIP)
    • In-situ Creep under Irradiation Facility
    • Electron Microscopy Facility
    • Metallography
    • Mechanical Testing
    • Corrosion Testing
    • Non-Destructive Characterization
    • Beamline Techniques at SINQ/SLS
  • Teaching and Education
    • List of PhD Theses
    • List of Master Theses
  • Advisory Committee
  • Partners / Links
  • Publications
  • Scientific Highlights

Info message

Ce contenu n'est pas disponible en français.

PARENT (Program to Assess the Reliability of Emerging Nondestructive Techniques)

Figure 1: PSI NDT Test Bodies with Real SCC Cracks and Their Characterization by Various NDT Techniques
Figure 1: PSI NDT Test Bodies with Real SCC Cracks and Their Characterization by Various NDT Techniques
In recent years several stress corrosion cracking (SCC) incidents occurred in Alloy 182/82 dissimilar metal welds (DMWs) in BWRs and PWRs, which seriously challenged the integrity of the primary coolant circuit in some cases. The detection and, in particular, sizing of such SCC defects in DMWs by current non-destructive testing (NDT) methods are both subjected to relevant uncertainties and errors. Crack depth is often significantly underestimated by NDT.

A Swiss consortium of ENSI, PSI, ALSTOM, EMPA and SVTI is participating in the international PARENT program (2011 - 2015), which is dealing with the assessment and quantification of established and new emerging and promising NDT techniques to detect and assess SCC flaws in DMWs. This multinational program is lead by the US NRC and includes regulators, industrial groups and research institutions and started in 2011. In the frame of PARENT, ALSTOM, SVTI and EMPA participate in open and closed round robin programs with different mock-up welds configurations containing artificial defects (EDM notches, fatigue cracks, SCC cracks). The PSI contribution was the challenging task to generate NDT test bodies with different realistic BWR and PWR SCC crack configurations, which can be used to systematically evaluate the limitations of different emerging ultrasonic and eddy current testing methods (UT & ECT) in an open round robin program (location and size of flaws are known by the NDT teams). These are the sole test bodies with real SCC cracks, but they have a simple geometry that significantly facilitates the NDT. In total nine test bodies with SCC and fatigue cracks were fabricated. The generation of NDT test bodies with SCC cracks was extremely time consuming and expensive, in particular in PWR environment, and involved test durations of up to six months! All the SCC cracks in the test bodies were characterized by a special high resolution mechanized UT immersion technique at ALSTOM in Switzerland (Figure 1).

The preliminary results with the PSI specimens clearly reveal that reliable sizing of real SCC defects with state-of-the-art techniques will be rather challenging and related to significant uncertainties. After the termination of the round robin programs, PSI will open selected NDT test bodies and fully characterize the cracks by detailed metallo- and fractography.

Sidebar

Contact

Hans-Peter Seifert

Paul Scherrer Institute
OHSA B09
CH-5232 Villigen PSI

Telephone:
+41 56 310 4402
E-mail:
hans-peter.seifert@psi.ch

top

Pied de page

Paul Scherrer Institut

Forschungsstrasse 111
5232 Villigen PSI
Suisse

Téléphone: +41 56 310 21 11
Téléfax: +41 56 310 21 99

Comment nous trouver 
Contact

Centre de visiteurs psi forum
Laboratoire élèves iLab (en allemand)
Centre de protonthérapie
Centre de Formation du PSI
PSI Guest House (en anglais)
PSI Gastronomie (en allemand)
psi forum shop

Service & Support

  • Annuaire
  • User Office
  • Accelerator Status
  • Publications du PSI
  • Fournisseurs
  • E-facture
  • Computing (en anglais)
  • Sicherheit (en allemand)

Carrière

  • Travailler au PSI
  • Offres d'emploi
  • Formation initiale et formation continue
  • Career Center
  • Formation professionnelle (en allemand)
  • Centre de Formation du PSI

Pour les médias

  • Le PSI en bref
  • Chiffres et faits
  • Le coin médias
  • Communiqués de presse
  • Réseaux sociaux

Suivez le PSI: Twitter (in English) LinkedIn Youtube Facebook Instagram Issuu RSS

Footer legal

  • Impressum
  • Conditions d'utilisation
  • Login éditeurs