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clear Waste Disposal Cns~s <br />a spent fuel pool accident to that r~diuactivity contained in only one-third of a <br />reactor cure's inventory nun-cunsen•atively biases the consequences, _ <br />Risk is defined as the product of the probability that an event occurs and its <br />consequences. Both the spent fuel pool accident's probability and its eonse-_•;~,: <br />yuences have been underestimated. Therefore, the spent fuel risk is higher than ~; <br />perceived by the existing assessments. _ ~; =~,~°~• <br />The spent fuel risk is far from unmanageable. tt only require; providing tta- <br />sonable assurance that spent fuel assemblies remain covertari with water.at all <br />times. The nuclear power industry has successfully ke t s ent fuel_`~"~`~r <br />P P asseatLli~. <br />covered with water since Shippingport began commercial operation in 11957. <br />task grows increasingly more difficult as more and more spent fuel assemblies <br />stored at the nuclear power plants. To prevent the safety margin f:oair <br />ing, the nuclear power industry should place greater emphasis on .the' <br />mentatiun monitoring spent fuel pool conditions. Spent foe! storage:nsk <br />ments should reflect actual plant configurations and operating conditions.,. <br />measures should provide reasonable assurance that spent fuel storage at nu <br />power plants presents negligible risk to public health and safety. ip <br />I <br />i~ <br />~~ <br />a <br />\uclear Rr;ularorv Communion. °Reactor Safett• Study: An Assessment of <br />C.S. Commercial Nuclear Po~.•er Plants." WASH-I-WO (NliREG-T~/t)l~t), O <br />Nuclear Regulatory Communion. "Final--Generic Environmental [mpa <br />Handling and Storage and Spenc Light Water Power Reactor Fuei " \L'REC <br />'_. and 3..-~ugunt 19~ 9 <br />P. G. Prasntnus. C. 1'. Kimura. D. B. ~kCallen. R. C. ~lurrav, Lawrence Live <br />Laboratory. and ~1. K. Ra~•indra. R. D. Campbell. P. S. Hashimoto. A.:~l. Yaf <br />ELE Engineering, [nc.. Nuclear Regulatory Cumminsiun, "Seismic Failut$ <br />.~nal~•ses of the Spent Fuel Pads at Two Representative Nuclear Power Planf: <br />1-6, January 19ti9 <br />E. D. Thn~m. Nuclear Regulatory Commission. "Rrwlatorv Analysis for <br />Generic lnsue 83. "Br~•und Destgn Banu Accidents in Spent•Fuel Poots;' I <br />,~prtl lygy. p. ~-~'. <br />Throm, p ;.;. <br />;:;rf <br />d. Da~•ni Rubenntein..~pplied Statuncs Branch. Nuclear Regulatory Commission, bo Rt <br />~luure. Chief. Applied Stahnttcs Branch. Nuclear Regulatory Cummissiun, "PtOb: <br />That the ~r~ct ~lalur ~rcident Uccur~ within Prescribed [nten•als," March 9, 1979. <br />-. John Darb~• to Cnue~i Stare \udrar Re;ularur~• Communion. "Concerns with NRC <br />Re•:~rw5.' March ly. Ivy;, p 11). • <br />~. Thrum. p ES-2. <br />`' Prin,mu. rt al. p ~w <br />Ilt Pras~inu~ rt al. p Dui <br />Y L~'• <br />~~St'..'('ii~.. <br />:~'.r, <br />~r.s~~-~~:.:r .. <br />.• ~,.,; . <br />r .`~ <br />u~.-, <br />,. ~ •... <br />I I Thrum. ~ ~• I <br />12 <br />