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Mobile Emergency Cooling System for Decay Heat Removal: Cooling Tower Designs for Forsmark NPP
2019 (English)Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

This master thesis has been conducted at Forsmark nuclear power plant. In nuclear power plants, safety is one of the most important tasks. After the Fukushima-accident, Forsmarks Kraftgrupp AB investigated the possibility to have additional emergency cooling systems. This thesis aims to investigate the use of cooling towers as mobile emergency cooling system for decay heat removal for the nuclear reactors at Forsmark NPP.

The advantages and disadvantages of different cooling tower types were looked at. To achieve mobility, some restraints were considered such as dimensions and weight. In the design of cooling towers, experimental values are used. As these crucial data are missing, a backfitting from actual designs was done to derivate the missing data.

The results of this thesis show that wet cooling towers are in this case more effective than dry cooling towers. The wet cooling towers cover in the best scenario up to 38MW which is 10 times higher than what can be achieved with the dry cooling tower. That covers the maximal decay heat released in the reactor F3 12 hours after a shutdown.

Place, publisher, year, edition, pages
2019. , p. 55
Series
UPTEC ES, ISSN 1650-8300 ; 18 032
Keywords [en]
Cooling tower, decay heat, nuclear power plant, cooling system, mobile, Forsmark, Merkel's number
Keywords [sv]
Kyltorn, kylsystem, resteffekt, kärnkraft, Forsmark, mobilt, Merkels nummer
National Category
Energy Systems Energy Engineering
Identifiers
URN: urn:nbn:se:uu:diva-400203OAI: oai:DiVA.org:uu-400203DiVA, id: diva2:1380499
External cooperation
Forsmarks Kraftgrupp AB
Educational program
Master Programme in Energy Systems Engineering
Presentation
2019-06-12, Å80101, Ångströmlaboratoriet, Lägerhyddsvägen 1, Uppsala, 01:44 (English)
Supervisors
Examiners
Available from: 2019-12-19 Created: 2019-12-19 Last updated: 2019-12-19Bibliographically approved

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CiteExportLink to record
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