PSAM 16 Conference Paper Overview
Welcome to the PSAM 16 Conference paper and speaker overview page.
Lead Author: Jukka Koskenranta Co-author(s): Ilkka Paavola Ilkka.Paavola@fortum.com
Rasmus Hotakainen Rasmus.Hotakainen@fortum.com
| Loviisa nuclear power plant spent fuel storage risk analysis |
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| Spent fuel of Loviisa NPP is stored submerged in water pools of spent fuel storage (SFS) at Loviisa site at least 10 years and up to many decades. First 1 – 2 years the spent fuel is cooled in refuelling pools in reactor buildings. After SFS the spent fuel will be moved to final repository at Olkiluoto. Loviisa NPP PRA covers level 1 and level 2 PRA for reactors and refuelling pools for both unit 1 and 2 and common spent fuel storage for both units. Loviisa NPP PRA covers also all operating and shutdown states and all types of initiating events. Current seismic PRA is outdated and under significant update. Loviisa SFS PRA models SFS with maximum expected heating capacity of current operating license from 2030. Mission times varies from no time to recover up to 2 months. Criteria for result evaluation is fuel exposure or mechanical break. Equipment failures have only minor impact to the risk because of low heating rate. Seismic initiating events cause over 50 % of fuel damage frequency (FDF) and large release frequency. Also early release frequency is considered. FDF 1,9E-7/a is about 1 % of Loviisa unit 1 and 2 core damage frequency. |
Paper JU83 Preview
Author and Presentation Info
Lead Author Name: Jukka Koskenranta (jukka.koskenranta@fortum.com)
Bio: Responsible for Loviisa NPP PRA external hazards. Few last years worked mainly with seismic PRA and seismic hazard. Experience also from many other PRA tasks including e.g. internal initiating events, internal hazards and estimating event probabilities and frequencies. I have mainly worked with level 1 PRA, but also some experience form level 2 PRA.
Country: Finland
Company: Fortum Power and Heat Oy
Job Title: Senior Engineer, Probabilistic Risk Assessment
Bio: Responsible for Loviisa NPP PRA external hazards. Few last years worked mainly with seismic PRA and seismic hazard. Experience also from many other PRA tasks including e.g. internal initiating events, internal hazards and estimating event probabilities and frequencies. I have mainly worked with level 1 PRA, but also some experience form level 2 PRA.
Country: Finland
Company: Fortum Power and Heat Oy
Job Title: Senior Engineer, Probabilistic Risk Assessment