NucPoolSafetyNRC

NucPoolSafetyNRC - http:/www.ans.org/misc/Weber.pdf...

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Ensuring Spent Fuel Pool Safety Michael Weber Deputy Executive Director for Operations U.S. Nuclear Regulatory Commission American Nuclear Society Meeting June 28, 2011 1
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• Nuclear emergency at Fukushima-Daiichi – 3 nuclear reactors – 4 reactor spent fuel pools – 1 common spent fuel pool Insights from Fukushima
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Spent fuel rods stored in spent fuel pools (SFPs) under at least 20 feet of water Typically ~1/4 to 1/3 of fuel in reactor replaced with fresh fuel every 18 to 24 months Spent fuel stored in pools minimum of 5 years 3 U.S. Spent Fuel Pools
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• Spent Fuel Pools (SFP) originally designed for limited storage of spent fuel until removed off-site • Safety of spent fuel in pools achieved primarily by maintaining water inventory, geometry, and soluble boron (PWRs) • Drain down can lead to uncovered fuel, heat-up, and the release of radionuclides 4 U.S. SFP Safety
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events that could damage the thick reinforced pool walls – Frequency of fuel uncovery; 6E-7 to 2E-6/yr. – NUREG-1738 – Consequences have been assessed to be large due to the potential for heatup of all the fuel in the pool – Heatup of the fuel in the pool can lead to
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NucPoolSafetyNRC - http:/www.ans.org/misc/Weber.pdf...

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