Agenda - 11-17-1998 - 5a - Laserfiche WebLink

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Nuclear Waste Disposal Cnsrs Veat Dueta Dr er Drywall to RPV to Dr well Y Reactor Building Bellows Separator ~ Eellowa Pool _ .., ~ Drywall ~\ Draia Reactor Vessel ' \ .,.;.:. ;,; '.` Double ,:..:: . Gated RP Reactor Well ~~ Fuel Pool ~J. ' ~'~% ~~``-~"`Removable / ' .Shield Plugs -'i Low Point Drain 15 'Y ' i~ Retura Diffuser ~'~ :-~, ~ ~~~~ r: ~~ '"" Gated . - Fuel Poal •Drywellt RPV to Dry7wel~ Bellowa Seal To Leak Detection Figure 8-i Reactor Well Seals reactor vessel flange level within 2U minutes, flooding the containment with :-~ approximately 2UU,000 gallons. [f a spent fuel assembly had been in transit at the ; time, it could have been partially or completely uncovered with potentially high '` radiatiun levels, fuel cladding failure and radioactivity release. In addition, if the ,a fuel transfer tube had been open, the spent fuel pout could have drained to a level =.= that would have uncovered the top of the irradiated fuel assemblies in the stor- '~ a;e racks.'` The inflatable seal on the gate to the transfer canal between the Unit 1 and i; the [trait 2 spent fuel pools at the Edwin I. Hatch C`fuclear Pl<int deflated in :j December 1u56 after the air supply to the seals was mistakenly isolated. Nearly y 111,000 gallons leaked from the spent fuel pools into the transfer canal, lowering ;~ the SFP level five feet. The leak was nut identified fur several hours because a leak detection instrument vas inoperable at the time. Georgia Power determined that ~~ the leakage path ~uuld ha~•e drained the spent heel pool to the bottom of the transfer canal, lea~•in~ only hvu feet of ~~•ater over the top of irradiated fuel a~semblie~ to the ~tura~e rack>. The radiatiun field at the spent fuel pool railing ~~ uuld hay ~ been 11111 Rem - hr in that ~undihun, primarily from the control blades r l.t