Change search
ReferencesLink to record
Permanent link

Direct link
Revealing typifying and assessing flaws and age-related degradation in nuclear power plant containments using the quantitative acoustic emission non-destructive inspection method
Margan Physial Diagnostics.
Department of Nuclear Safety, Stockholm.
2010 (English)In: Scientific Israle, Vol. 12, no 1Article in journal (Refereed) Published
Abstract [en]

Providing safety of reinforced concrete containments is one of the main challenges of the nuclear industry. This is because:

• Concrete degradation, decreasing compressive, tensile and yield strengths, macro- and micro- cracks, fatigue cracks, de-bonding reinforcement, spallation and porosity reduce the fracture toughness, change the magnitude and orientation of the main stresses, and decrease the load-carrying capabilities of structures.

• Dehydration of cement stone, due to temperature, radiation, leaching of calcium hydroxide from the concrete, sulfate attack, alkali-aggregate reaction and subsequent swelling, is evaluated currently by traditional local NDE methods with low accuracy.

• Revealing corrosion location and determination of its type and danger level in reinforced or pre-stressed concrete containments is not performed on a regular basis.

• Movement of soil under the containment base is evaluated only when there are visible indications of damage.

The situation is even worse because existing Non-Destructive Inspection (NDI) methods provide limited information and are not suitable for revealing, identifying and assessment of flaws in structural elements of nuclear power plant containments. To solve the above-mentioned problems, the authors have created and successfully used for different applications the Quantitative Acoustic Emission Non-Destructive Inspection technology (QAE NDI). The results of the investigations presented below demonstrate the capabilities, advantages and limitations of QAE NDI technology for revealing, typifying, and assessing flaws and age-related degradation in nuclear power plant containments.

Place, publisher, year, edition, pages
2010. Vol. 12, no 1
Keyword [en]
Nuclear power plants, Containments, inspection, Quantitative Acoustic Emission Non- Destructive Inspection method
URN: urn:nbn:se:kth:diva-27606OAI: diva2:377415
QC 20101214Available from: 2010-12-14 Created: 2010-12-14 Last updated: 2010-12-20Bibliographically approved
In thesis
1. Understanding the application of knowledge management to the safety critical facilities
Open this publication in new window or tab >>Understanding the application of knowledge management to the safety critical facilities
2010 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

Challenges to the operating nuclear power plants and transport infrastructures are outlined. It is concluded that most aggravating factors are related to knowledge. Thus, of necessity, effective knowledge management is required.

Knowledge management theories are reviewed in their historical perspective as a natural extension and unification of information theories and theories about learning. The first line is identified with names as Wiener, Ashby, Shannon, Jaynes, Dretske, Harkevich. The second line – with Vygotsky, Engeström, Carayannis.

The recent developments of knowledge management theorists as Davenport, Prusak, Drew, Wiig, Zack are considered stressing learning, retaining of knowledge, approaching the state awareness of awareness, and alignment of knowledge management with the strategy of the concerned organizations.

Further, some of the details and results are presented of what is achieved so far. More specifically, knowledge management tools are applied to the practical work activities as event reporting, data collection, condition assessment, verification of safety functions and incident investigation. Obstacles are identified and improvements are proposed.

Finally, it is advised to continue to implement and further develop knowledge management tools in the organizations involved in various aspects of safety critical facilities.

Abstract [sv]

Utmaningar som kärnkraftverken och transportinfrastrukturer står inför har kartlagts. Kartläggningen pekar på att problemen är relaterade till brister i kunskap. Det är därför nödvändigt att fokusera på kunskap och implementera kunskapsmanagement med däri ingående teorier.

Sådana teorier beskrivs i ett historiskt perspektiv. Det framgår att kunskapsmanagement har flera rötter av vilka de viktigaste är informationsteorier och teorier om inlärning. Den första är associerad med namn som Wiener, Ashby, Jaynes, Dretske, Harkevich. Den andra med namn som Vygotsky, Engeström, Carayannis.

Även bidrag från moderna tänkare inom kunskapsmanagement som Davenport, Prusak, Drew, Wiig, Zack utvärderas för att förstå hur de involverade organisationerna kontinuerligt kan lära sig, bevara kunskap, nå medvetande gällande kunskap och integrera kunskapsmanagement med företagsstrategier.

Vidare så presenteras ett urval av resultat för att illustrera vad som har åstadkommits hittills. Kunskapsmanagement-teorier appliceras på verksamheter som erfarenhetsrapportering, databaser, provning, verifiering av säkerhetsfunktioner och utredning av incidenter. Kunskapsmanagement gör det möjligt att identifiera och beskriva brister i de etablerade verksamheterna och att föreslå förbättringar.

Rekommendationen för framtiden är att fortsätta arbetet med implementering och vidareutveckling av kunskapsmanagement för applikationer som är relevanta för kärkraftverk, transportinfrastrukturer och andra säkerhetskritiska anläggningar.

Place, publisher, year, edition, pages
Stockholm: KTH, 2010. x, 23 p.
Trita-BKN. Bulletin, ISSN 1103-4270 ; 105
National Category
Subatomic Physics Building Technologies
urn:nbn:se:kth:diva-27608 (URN)
Public defence
2010-12-15, F3, Lindstedtsvägen 26, KTH, Stockholm, 10:00 (English)
QC 20101214Available from: 2010-12-14 Created: 2010-12-14 Last updated: 2010-12-20Bibliographically approved

Open Access in DiVA

No full text

Search in DiVA

By author/editor
Ilina, Elena

Search outside of DiVA

GoogleGoogle Scholar
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Total: 38 hits
ReferencesLink to record
Permanent link

Direct link