Direkt zum Inhalt
  • Paul Scherrer Institut PSI
  • PSI Research, Labs & User Services

Digital User Office

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

Hauptnavigation

  • Research at PSIÖffnen dieses Hauptmenu Punktes
    • Research Initiatives
    • Research Integrity
    • Scientific Highlights
    • Scientific Events
    • Scientific Career
    • PSI-FELLOW
    • PSI Data Policy
  • Research Divisions and LabsÖffnen dieses Hauptmenu Punktes
    • Overview
    • Research with Neutrons and Muons
    • Photon Science
    • Energy and Environment
    • Nuclear Energy and Safety
    • Biology and Chemistry
    • Large Research Facilities
  • Facilities and InstrumentsÖffnen dieses Hauptmenu Punktes
    • Overview
    • Large Research Facilities
    • Facilities
    • PSI Facility Newsletter
  • PSI User ServicesÖffnen dieses Hauptmenu Punktes
    • User Office
    • Methods at the PSI User Facilities
    • Proposals for beam time
    • Proposal Deadlines
    • Data Analysis Service (PSD)
    • EU support programmes
  • DE
  • EN
  • FR

Digital User Office (mobile)

  • Digital User Office

Sie befinden sich hier:

  1. PSI Home
  2. Labs & User Services
  3. NES
  4. LRT
  5. Sacre
  6. Projects
  7. FCVS

Sekundäre Navigation

Severe Accident Research Group

  • Team
  • Facilities
  • Projects
  • Scientific Highlight
  • Tools
  • Teaching and Education
    • PhD Theses
  • Journal Publications
    • Journals 2021
    • Journal 2020
    • Journal 2019
    • Journal 2018
    • Journal 2017
    • Journal 2016
    • Journal 2015
    • Journal 2014
    • Journal 2013
    • Journal 2012
    • Journal 2011
    • Journal 2010
    • Journal 2005
  • Conference Articles
    • Conference Articles 2021
    • Conference Articles 2020
    • Conference Articles 2019
    • Conference Articles 2018
    • Conference Articles 2017
    • Conference Articles 2016
    • Conference Articles 2013
    • Conference Articles 2012
    • Conference Articles 2011
    • Conference Articles 2006-2010
    • Conference Articles 2001-2005
    • Conference Articles 2000 and before
  • International Reports
  • Public News

Info message

Dieser Inhalt ist nicht auf Deutsch verfügbar.

Filtered Containment Venting Systems (FCVS)

The filtered containment venting system is recognized to be an efficient measure to reduce release of radioactivity to the environment in the accident sequences when the containment pressure needs to be reduced to avoid failure of the containment. Many reactors worldwide, and all the Swiss nuclear power plants (NPP) have installed FCVS. After the Fukushima accidents many additional countries have required FCVSs to be installed in their reactors. This project is an experimental investigation of the source term mitigation using FCVS with a focus on wet scrubbers. The wet scrubber systems are generally accepted as having a very high collection efficiency for aerosols under their optimum operation conditions, even though they have a minimum collection efficiency in the particle size range 0.2-0.3 µm (aerodynamic diameter). However, when the conditions are not in the optimal range due to, e.g., decreased water inventory, or the flow rate is outside of the design range, the collection efficiency of the scrubbers decreases. In addition, radioactivity may escape from the scrubbers if droplets are entrained from the pool surface carrying soluble compounds with them, e.g., Cs, and I. Droplet formation may be expected under very high flow rates in the scrubbers, or under boiling conditions due to long-term containment depressurization through the FCVS. Iodine retention for both molecular iodine and organic iodide species in the pools during several venting cycles as well as under varying conditions in the pool, e.g., hot pool, low pH, are further open issues. This project focuses on some of the topics which have not been thoroughly addressed in earlier work:
  • Aerosol retention in the FCVS when the flow rate through the FCVS is very low and the inertial forces acting on the particles close to the injection point are relatively small
  • Aerosol retention in the FCVS when the flow rate through the FCVS is very high and droplet formation on the pool surface may occur
  • Aerosol retention when the water in the FCVS is boiling, and increased release of fission products may occur due to carry-over of soluble material in the droplets and steam
  • Iodine retention during multiple venting cycles
  • Long-term behavior of iodine in the scrubber solution
  • Test of additives in the water to retain organic iodine

Mit Sidebar

Contact

Research Division
Nuclear Energy and Safety (NES)
Laboratory for Reactor-Physics and Thermal-Hydraulics (LRT)
Paul Scherrer Institute
5232 Villigen PSI
Switzerland

Group Leader a.i.
Dr. Detlef Suckow

Office: OHSA/C04
+41 56 310 4145
detlef.suckow@psi.ch

Members Area

top

Fussbereich

Paul Scherrer Institut

Forschungsstrasse 111
5232 Villigen PSI
Schweiz

Telefon: +41 56 310 21 11
Telefax: +41 56 310 21 99

Der Weg zu uns
Kontaktformular

Besucherzentrum psi forum
Schülerlabor iLab
Zentrum für Protonentherapie
PSI Bildungszentrum
PSI Guest House (in english)
PSI Gastronomie

Service & Support

  • Telefonbuch/​Personensuche
  • User Office
  • Accelerator Status
  • Publikationen des PSI
  • Lieferanten
  • E-Rechnung
  • Computing
  • Sicherheit

Karriere

  • Arbeiten am PSI
  • Stellenangebote
  • Aus- und Weiterbildung
  • Berufsbildung
  • PSI Bildungszentrum

Für die Medien

  • Das PSI in Kürze
  • Zahlen und Fakten
  • Medienkontakt
  • Medienmitteilungen
  • Social Media Newsroom

Folgen Sie uns: Twitter (deutsch) LinkedIn Youtube Issuu RSS

Footer legal

  • Impressum
  • Nutzungsbedingungen
  • Editoren-Login