Ändra sökning
RefereraExporteraLänk till posten
Permanent länk

Direktlänk
Referera
Referensformat
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annat format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annat språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf
Sensitivity Study of Steam Explosion Characteristics to Uncertain Input Parameters Using TEXAS-V Code
KTH, Skolan för teknikvetenskap (SCI), Fysik, Kärnkraftssäkerhet.
KTH, Skolan för teknikvetenskap (SCI), Fysik, Kärnkraftssäkerhet.ORCID-id: 0000-0002-9123-2944
KTH, Skolan för teknikvetenskap (SCI), Fysik, Kärnkraftssäkerhet.ORCID-id: 0000-0002-0683-9136
KTH, Skolan för teknikvetenskap (SCI), Fysik, Kärnkraftssäkerhet.ORCID-id: 0000-0001-7816-8442
2014 (Engelska)Ingår i: NUTHOS10, Paper-1293, Okinawa, Japan, 2014, Atomic Energy Society of Japan , 2014Konferensbidrag, Publicerat paper (Refereegranskat)
Abstract [en]

Release of core melt from failed reactor vessel into a pool of water is adopted in several existing designs of light water reactors (LWRs) as an element of severe accident mitigation strategy. Corium melt is expected to fragment, solidify and form a debris bed coolable by natural circulation. However, steam explosion can occur upon melt release threatening containment integrity and potentially leading to large early release of radioactive products to the environment. There are many factors and parameters that could be considered for prediction of the fuel-coolant interaction (FCI) energetics, but it is not clear which of them are the most influential and should be addressed in risk analysis. The goal of this work is to assess importance of different uncertain input parameters used in FCI code TEXAS-V for prediction of the steam explosion energetics. Both aleatory uncertainty in characteristics of melt release scenarios and water pool conditions, and epistemic uncertainty in modeling are considered. Ranges of the uncertain parameters are selected based on the available information about prototypic severe accident conditions in a reference design of a Nordic BWR. Sensitivity analysis with Morris method is implemented using coupled TEXAS-V and DAKOTA codes. In total 12 input parameters were studied and 2 melt release scenarios were considered. Each scenario is based on 60,000 of TEXAS-V runs. Sensitivity study identified the most influential input parameters, and those which have no statistically significant effect on the explosion energetics. Details of approach to robust usage of TEXAS-V input, statistical enveloping of TEXAS-V output and interpretation of the results are discussed in the paper. We also provide probability density function (PDF) of steam explosion impulse estimated using TEXAS-V for reference Nordic BWR. It can be used for assessment of the uncertainty ranges of steam explosion loads for given ranges of input parameters.

Ort, förlag, år, upplaga, sidor
Atomic Energy Society of Japan , 2014.
Nyckelord [en]
Severe accident, ex-vessel steam explosion, Morris diagrams
Nationell ämneskategori
Övrig annan teknik
Identifikatorer
URN: urn:nbn:se:kth:diva-164065OAI: oai:DiVA.org:kth-164065DiVA, id: diva2:803086
Konferens
NUTHOS10,Okinawa, Japan, Dec. 14-18, 2014
Anmärkning

QC 20150427

Tillgänglig från: 2015-04-13 Skapad: 2015-04-13 Senast uppdaterad: 2015-04-27Bibliografiskt granskad

Open Access i DiVA

fulltext(1225 kB)152 nedladdningar
Filinformation
Filnamn FULLTEXT01.pdfFilstorlek 1225 kBChecksumma SHA-512
d028b8bba84a28a1d2b1a5db5941fd5293e1f3d439e337cc7df306f7ba4367a4363d6a396c30d893181e56839be977f2b61509906918fc79652008c069f59561
Typ fulltextMimetyp application/pdf

Övriga länkar

Conference website

Personposter BETA

Basso, SimoneKudinov, PavelBechta, Sevostian

Sök vidare i DiVA

Av författaren/redaktören
Grishchenko, DmitryBasso, SimoneKudinov, PavelBechta, Sevostian
Av organisationen
Kärnkraftssäkerhet
Övrig annan teknik

Sök vidare utanför DiVA

GoogleGoogle Scholar
Totalt: 152 nedladdningar
Antalet nedladdningar är summan av nedladdningar för alla fulltexter. Det kan inkludera t.ex tidigare versioner som nu inte längre är tillgängliga.

urn-nbn

Altmetricpoäng

urn-nbn
Totalt: 218 träffar
RefereraExporteraLänk till posten
Permanent länk

Direktlänk
Referera
Referensformat
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annat format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annat språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf