Change search
Link to record
Permanent link

Direct link
BETA
Publications (10 of 48) Show all publications
Fjellgaard Mikalsen, R., Hagen, B. C., Steen-Hansen, A., Krause, U. & Frette, V. (2019). Extinguishing Smoldering Fires in Wood Pellets with Water Cooling: An Experimental Study. Fire technology, 25(1), 257-284
Open this publication in new window or tab >>Extinguishing Smoldering Fires in Wood Pellets with Water Cooling: An Experimental Study
Show others...
2019 (English)In: Fire technology, ISSN 0015-2684, E-ISSN 1572-8099, Vol. 25, no 1, p. 257-284Article in journal (Refereed) Published
Abstract [en]

Smoldering fires in stored or transported solid biofuels are very difficult to extinguish. The current study has explored heat extraction from the combustion zone as a method for extinguishing such flameless fires. Heat extraction from the sample was made feasible using water flowing through a metal pipe located inside the sample. The fuel container was a steel cylinder with insulated side walls, open at the top and heated from below. Wood pellets (1.25 kg, 1.8 l) was used as fuel. Results from small-scale experiments provide proof-of-concept of cooling as a new extinguishing method for smoldering fires. During self-sustained smoldering with heat production in the range 0 W to 60 W, the heat loss to the cooling unit was in the range 5 W to 20 W. There were only marginal differences between non-extinguished and extinguished cases. Up-scaling is discussed, cooling could be feasible for preventing smoldering fires in silos.

Keywords
Fuel storage safety Industrial fire, Biofuels, Smoldering, Extinguishment, Fire suppression
National Category
Natural Sciences
Identifiers
urn:nbn:se:ri:diva-36373 (URN)10.1007/s10694-018-0789-9 (DOI)2-s2.0-85056650077 (Scopus ID)
Available from: 2018-11-27 Created: 2018-11-27 Last updated: 2019-01-23Bibliographically approved
Sesseng, C., Storesund, K. & Steen-Hansen, A. (2018). Analysis of 985 fire incidents related to oil- and gas production  on the Norwegian shelf. In: Stein Haugen, Anne Barros, Coen van Gulijk, Trond Kongsvik, Jan Erik Vinnem (Ed.), Safety and Reliability: Safe Societies in a Changing World. Paper presented at Safety and Reliability – Safe Societies in a Changing World: Proceedings of ESREL 2018, June 17-21, 2018, Trondheim, Norway (pp. 1847-1854). , 1
Open this publication in new window or tab >>Analysis of 985 fire incidents related to oil- and gas production  on the Norwegian shelf
2018 (English)In: Safety and Reliability: Safe Societies in a Changing World / [ed] Stein Haugen, Anne Barros, Coen van Gulijk, Trond Kongsvik, Jan Erik Vinnem, 2018, Vol. 1, p. 1847-1854Conference paper, Published paper (Refereed)
Abstract [en]

Fire is a major threat in the petroleum industry. However, little has been published about the fire related incidents that have occurred in the Norwegian petroleum sector. To gain more knowledge, data from 985 incidents in the 1997 - 2014 period has been analysed. Examples of factors studied are type of facility involved, involved area or system, consequences and severity level. The analysis of the fire incidents reveals that even though many incidents are reported, the large majority of these have not imposed risks for severe fire accidents. It has also provided valuable information regarding possible dangerous situations, commonly in-volved areas, types of equipment as well as types of activity that were involved. Twenty-nine percent of the incidents were false alarms, which must be regarded as a high number in an industry where any production stop could be extremely costly.

National Category
Reliability and Maintenance
Identifiers
urn:nbn:se:ri:diva-36548 (URN)2-s2.0-85058105023 (Scopus ID)9780815386827 (ISBN)
Conference
Safety and Reliability – Safe Societies in a Changing World: Proceedings of ESREL 2018, June 17-21, 2018, Trondheim, Norway
Available from: 2018-11-29 Created: 2018-11-29 Last updated: 2019-01-07Bibliographically approved
Sesseng, C., Storesund, K. & Steen-Hansen, A. (2018). Analysis of 985 fire incidents related to oil-and gas production on the Norwegian continental shelf. In: Safety and Reliability - Safe Societies in a Changing World - Proceedings of the 28th International European Safety and Reliability Conference, ESREL 2018: . Paper presented at 28th International European Safety and Reliability Conference, ESREL 2018, 17 June 2018 through 21 June 2018 (pp. 1847-1854).
Open this publication in new window or tab >>Analysis of 985 fire incidents related to oil-and gas production on the Norwegian continental shelf
2018 (English)In: Safety and Reliability - Safe Societies in a Changing World - Proceedings of the 28th International European Safety and Reliability Conference, ESREL 2018, 2018, p. 1847-1854Conference paper, Published paper (Refereed)
Abstract [en]

Fire is a major threat in the petroleum industry. However, little has been published about the fire related incidents that have occurred in the Norwegian petroleum sector. To gain more knowledge, data from 985 incidents in the 1997–2014 period has been analysed. Examples of factors studied are type of facility involved, involved area or system, consequences and severity level. The analysis of the fire incidents reveals that even though many incidents are reported, the large majority of these have not imposed risks for severe fire accidents. It has also provided valuable information regarding possible dangerous situations, commonly involved areas, types of equipment as well as types of activity that were involved. Twenty-nine percent of the incidents were false alarms, which must be regarded as a high number in an industry where any production stop could be extremely costly.

Keywords
Gasoline, Petroleum industry, Reliability, Risk assessment, Dangerous situations, False alarms, Fire accident, Fire incidents, Norwegian continental shelves, Oil and gas production, Petroleum sectors, Fires
National Category
Natural Sciences
Identifiers
urn:nbn:se:ri:diva-37462 (URN)2-s2.0-85058105023 (Scopus ID)9780815386827 (ISBN)
Conference
28th International European Safety and Reliability Conference, ESREL 2018, 17 June 2018 through 21 June 2018
Available from: 2019-01-22 Created: 2019-01-22 Last updated: 2019-01-22Bibliographically approved
Sesseng, C., Storesund, K. & Steen-Hansen, A. (2018). Analysis of fatal fires in Norway over a decade, – A retrospective observational study. In: Safety and Reliability - Safe Societies in a Changing World - Proceedings of the 28th International European Safety and Reliability Conference, ESREL 2018: . Paper presented at 28th International European Safety and Reliability Conference, ESREL 2018, 17 June 2018 through 21 June 2018 (pp. 2837-2844).
Open this publication in new window or tab >>Analysis of fatal fires in Norway over a decade, – A retrospective observational study
2018 (English)In: Safety and Reliability - Safe Societies in a Changing World - Proceedings of the 28th International European Safety and Reliability Conference, ESREL 2018, 2018, p. 2837-2844Conference paper, Published paper (Refereed)
Abstract [en]

Five-hundred-and-seventy-one fatalities were registered in the official fire statistics in Norway between 2005–2014. However, little is known about the victims. This study collected information from several sources to build a holistic database and gain more knowledge about the technical and social aspects of the incidents, forming a basis for more targeted measures. Human behaviour greatly affects the risk of fire, which supports why social aspects of incidents should be considered when identifying risk factors associated with the victims. The results showed a clear distinction between victims above and below the age of 67 with respect to risk factors. For the elderly, reduced mobility, impaired cognitive ability, mental disorders and smoking were observed risk factors. For the younger victims known substance abuse, mental illness, alcoholic influence and smoking were observed, mostly in combination. This shows that fire is a social problem, and should be prevented by initiating customised measures

Keywords
Behavioral research, Diseases, Economic and social effects, Reliability, Social aspects, Cognitive ability, Fire statistics, Human behaviours, Mental disorders, Mental illness, Observational study, Social problems, Substance abuse, Fires
National Category
Natural Sciences
Identifiers
urn:nbn:se:ri:diva-37461 (URN)2-s2.0-85058136726 (Scopus ID)9780815386827 (ISBN)
Conference
28th International European Safety and Reliability Conference, ESREL 2018, 17 June 2018 through 21 June 2018
Available from: 2019-01-22 Created: 2019-01-22 Last updated: 2019-01-22Bibliographically approved
Steen-Hansen, A., Fjellgaard Mikalsen, R. & Jensen, U. E. (2018). Smouldering Combustion inLoose-Fill Wood Fibre Thermal Insulation: An Experimental Study. Fire technology, 54(6), 1585-1608
Open this publication in new window or tab >>Smouldering Combustion inLoose-Fill Wood Fibre Thermal Insulation: An Experimental Study
2018 (English)In: Fire technology, ISSN 0015-2684, E-ISSN 1572-8099, Vol. 54, no 6, p. 1585-1608Article in journal (Refereed) Published
Abstract [en]

A bench-scale experimental setup has been used to study the conditions necessary

for smouldering ignition in four types of loose-fill wood fibre thermal insulation, and

to study the development of the smouldering process. The products varied with regard to

wood species, grain size and fire retardant chemical additives. The test material was

placed in an insulated open top container and heated from below. Temperatures within

the sample and mass loss were measured during the tests. Both the fibre size and the level

of added fire retardant seem to influence the smouldering ignition. Two different types of

smouldering were identified in this study. Materials undergoing smouldering Type 1

obtained maximum temperatures in the range 380C to 440C and a total mass loss of

40 wt% to 50 wt%. Materials undergoing smouldering Type 2 obtained maximum temperatures

in the range 660C to 700C and a total mass loss of 80 wt% to 90 wt%. This

implies that Type 2 smouldering involves secondary char oxidation, which represents a

risk for transition to flaming combustion and thereby a considerable fire hazard. This has

been an exploratory project and the results must therefore be considered as indicative.

The findings may, however, have implications for fire safety in the practical use of loosefill

wood fibre insulation in buildings, and further experimental studies should be performed

with this in mind to obtain more knowledge about the topic.

National Category
Engineering and Technology
Identifiers
urn:nbn:se:ri:diva-34581 (URN)10.1007/s10694-018-0757-4 (DOI)2-s2.0-85050004619 (Scopus ID)
Available from: 2018-08-14 Created: 2018-08-14 Last updated: 2019-01-23Bibliographically approved
Steen-Hansen, A. (2018). Utredning - branntekniske ytelser for kledninger og overflater.
Open this publication in new window or tab >>Utredning - branntekniske ytelser for kledninger og overflater
2018 (Norwegian)Report (Other academic)
Abstract [no]

I denne utredning er de preaksepterte ytelsene som gjelder for kledninger og overflater vurdert, jf. TEK17 § 11-9. Både innvendige og utvendige (fasader) kledninger og overflater er behandlet. Utredningen er gjort med bakgrunn itidligere og eksisterende norsk regelverk, i tillegg har vi også undersøkthvordan kledningsklassene anvendes og tolkes i svenske og danskebyggeregler.

I utredningen er også dagens preaksepterte ytelse, klasse B-s3,d0, for utvendig kledning inkludert hulrom på fasader vurdert, med utgangspunkt i de britiske undersøkelsene etter brannen i Grenfell Tower i London i juni 2017. Det er i tillegg gjort en enkel vurdering av hvordan fasadeløsningene som ble testet i henhold til britisk standard BS 8414-1 ville oppført seg ved testing i henhold til metoden SP FIRE 105.

Utredningen konkluderer med flere anbefalinger til endringer av tekst iveiledningen til TEK17

Abstract [en]

The Norwegian Building Authority (DiBK) has asked RISE Fire Research to review the preaccepted fire performances for coverings and linings in the guidelines to the Norwegian building regulations. Requirements for both interior and exterior coverings and surfaces(façades) have been evaluated.

The review is based on a study of previous and existing Norwegian building regulations, and in addition, we have also examined how the classes for coverings and linings are applied and interpreted in the Swedish and Danish building regulations.

Today's pre-accepted fire performance, class B-s3, d0, for exterior cladding including a cavityon facades is evaluated, based on the British investigations after the fire in Grenfell Tower inLondon in June 2017. A simple assessment of how the façade systems that were tested according to the British standard BS 8414-1 probably would behave if tested according to the method SP FIRE 105.The report concludes with several recommendations on revision of the text in the guidelines to the building regulations TEK17 intended to prevent misunderstandings regarding the fire regulations for coverings and linings.

Publisher
p. 41
Series
RISE Fire Research rapport ; A18 20354:1
National Category
Building Technologies
Identifiers
urn:nbn:se:ri:diva-37673 (URN)
Available from: 2019-01-29 Created: 2019-01-29 Last updated: 2019-01-29Bibliographically approved
Sesseng, C., Storesund, K. & Steen-Hansen, A. (2017). Analyse av dødsbranner i Norge i perioden 2005 - 2014.
Open this publication in new window or tab >>Analyse av dødsbranner i Norge i perioden 2005 - 2014
2017 (Norwegian)Report (Other academic)
Abstract [no]

I denne studien er informasjon fra brannstatistikk og andre kilder fra perioden 2005 – 2014 analysert, for å få mer detaljert kunnskap om hvem som omkommer i brann og hvorfor de omkommer. Dermed kan tiltak iverksettes mer målrettet for å redusere antall omkomne.  Følgende spørsmål er forsøkt besvart i studien: 1. Hvilke risikofaktorer forbindes med de som omkommer i branner i Norge? 2. Hva er årsakene til dødsbranner i Norge? 3. Hvordan kan dødsbranner best forebygges?  I den aktuelle perioden er det registrert 517 branner med 571 omkomne. Vi har kartlagt informasjon fra 347 politirapporter, identifisert 387 omkomne og trukket ut informasjon fra pasientjournalene til 248 av de omkomne.

Publisher
p. 75
Series
RISE rapport ; A17 20176:1
National Category
Natural Sciences
Identifiers
urn:nbn:se:ri:diva-33293 (URN)
Available from: 2018-02-22 Created: 2018-02-22 Last updated: 2018-08-17
Sesseng, C., Storesund, K. & Steen-Hansen, A. (2017). Analysis of fatal fires in Norway in the 2005 – 2014 period.
Open this publication in new window or tab >>Analysis of fatal fires in Norway in the 2005 – 2014 period
2017 (Norwegian)Report (Other academic)
Abstract [en]

In this study, information from fire statistics and other sources has been analyzed to get more detailed knowledge than before about who dies in fires and why. This will help to implement more targeted measures in order to reduce the number of people perishing in fires.  The study attempted to answer the following questions: 1. What risk factors are associated with those who perish in fires in Norway? 2. What are the causes of fatal fires in Norway? 3. How can fatal fires best be prevented?  A total of 517 fires with 571 fatalities are registered in the official fire statistics in the 2005 – 2014 period. We have examined 347 police investigation reports, identified 387 deceased and  extracted information from 248 medical records.

Publisher
p. 73
Series
RISE rapport ; A17 20176:2
National Category
Natural Sciences
Identifiers
urn:nbn:se:ri:diva-33292 (URN)
Available from: 2018-02-22 Created: 2018-02-22 Last updated: 2018-08-17Bibliographically approved
Daaland Wormdahl, E., Hox, K., Steen-Hansen, A., Baker, G. & Ulfsnes, M. K. (2017). Brannsikkerhet i bygg med massivtre.
Open this publication in new window or tab >>Brannsikkerhet i bygg med massivtre
Show others...
2017 (Norwegian)Report (Other academic)
Abstract [no]

I dette prosjektet er det gjennomført et litteraturstudie på brannsikkerhet ved bruk av massivtre i bygninger.   Problemstillingene det ble jobbet med var temperaturforløp i en naturlig brann, selvslokking og forkullingshastighet. Ut fra litteraturstudiet konkluderer vi med at kunnskapen om brannsikkerhet i forbindelse med massivtre i bygninger er mangelfull.  Det er spesielt rundt problemstillinger knyttet til ubeskyttet massivtre, forkullingshastigheter, delaminering og selvslokking det er flere ubesvarte spørsmål, og dette er forhold som kan ha stor innvirkning på brannsikkerheten i bygninger.   Vi anbefaler at det utarbeides retningslinjer for hvordan anvendelse av massivtre skal håndteres i prosjektering og risikoanalyse for nye bygg

Publisher
p. 24
Series
SPFR-rapport ; A17 20229:1
National Category
Natural Sciences
Identifiers
urn:nbn:se:ri:diva-33298 (URN)
Available from: 2018-02-22 Created: 2018-02-22 Last updated: 2018-08-16Bibliographically approved
Fjellgaard Mikalsen, R., Hagen, B. C., Steen-Hansen, A. & Frette, V. (2017). Extinguishing smoldering fires in wood pellets through cooling. In: : . Paper presented at Magdeburg Fire and Explosion Days (MBE) 23-24 March 2017.
Open this publication in new window or tab >>Extinguishing smoldering fires in wood pellets through cooling
2017 (English)Conference paper, Published paper (Other academic)
Abstract [en]

Extinguishing smoldering fires is a severe challenge for fire brigades, and has proven to be difficult even on the lab scale. In this study, the influence of a closed water cooling loop located within the fuel bed was investigated experimentally. Increasing the cooling led to a system less prone to intense combustion at an early stage, and eventually to complete extinguishment of self-sustained smoldering fires. Extinguishment was obtained in half of the cases with maximum cooling. Extinguishment occurred soon after smoldering had been established, giving a significant reduction in fuel consumption compared to the self-sustained smoldering fires that continued to complete burn-out.

National Category
Other Engineering and Technologies
Identifiers
urn:nbn:se:ri:diva-37541 (URN)10.978.300/0562013 (DOI)9783000562013 (ISBN)
Conference
Magdeburg Fire and Explosion Days (MBE) 23-24 March 2017
Available from: 2019-01-23 Created: 2019-01-23 Last updated: 2019-01-29Bibliographically approved
Identifiers
ORCID iD: ORCID iD iconorcid.org/0000-0002-4831-7563

Search in DiVA

Show all publications
v. 2.35.5