ISOE-Europe 3/25/04 1 San Onofre Unit 1 Decommissioning Eric M. Goldin Eric M. Goldin Southern California Edison Company

ISOE-Europe 3/25/04 2 San Onofre Nuclear Generating Station (SONGS)

ISOE-Europe 3/25/04 3 SONGS 1 History First Generation Westinghouse 3-loop PWR 450 MWeFirst Generation Westinghouse 3-loop PWR 450 MWe Operated January 1968 – November 1992Operated January 1968 – November 1992 ContainmentContainment –1” thick steel sphere –3’ steel-reinforced concrete Sphere Enclosure Building Collocated with SONGS 2 and 3, 1100 MWe eachCollocated with SONGS 2 and 3, 1100 MWe each –CE PWRs, commercial 1983 and 1984

ISOE-Europe 3/25/04 4 SONGS 1 Decommissioning Strategy/Evolution After shutdown (11/92), Operating License converted to Possession Only LicenseAfter shutdown (11/92), Operating License converted to Possession Only License Systems categorized: Required for Operation (RO) or Not Required for Operation (NRO)Systems categorized: Required for Operation (RO) or Not Required for Operation (NRO) Unit placed in SAFSTOR with intention to wait for SONGS Units 2 & 3Unit placed in SAFSTOR with intention to wait for SONGS Units 2 & 3 Early industry experience demonstrated acceptable decommissioning methodsEarly industry experience demonstrated acceptable decommissioning methods 1996 SCE Team investigates Options/Costs/Benefits of commencing D&D in near term1996 SCE Team investigates Options/Costs/Benefits of commencing D&D in near term 1997 Decision to move forward with SONGS 1 D&D planning1997 Decision to move forward with SONGS 1 D&D planning

ISOE-Europe 3/25/04 5 Reduce customer costsReduce customer costs –Lower fuel storage costs –Known LLRW burial costs Reduce an uncertain customer liabilityReduce an uncertain customer liability Decommissioning can be accomplished safely using proven technologiesDecommissioning can be accomplished safely using proven technologies Availability of skilled workforce knowledgeable of SONGS Unit 1Availability of skilled workforce knowledgeable of SONGS Unit 1 Adequacy of Decommissioning Trust FundAdequacy of Decommissioning Trust Fund Basis for Decision to Begin Decommissioning

ISOE-Europe 3/25/04 6 Protection of the spent fuel throughout the decommissioning period until DOE acceptanceProtection of the spent fuel throughout the decommissioning period until DOE acceptance Industrial health and safetyIndustrial health and safety Disposal of radioactive and hazardous waste to the highest standards practical to ensure long term public health and safetyDisposal of radioactive and hazardous waste to the highest standards practical to ensure long term public health and safety Insure compliance (and the public perception of compliance) with all state and federal requirementsInsure compliance (and the public perception of compliance) with all state and federal requirements Perform work in a reasonable and prudent mannerPerform work in a reasonable and prudent manner Project Priorities

ISOE-Europe 3/25/04 7 Major Activities Initial PlanningInitial Planning Separation, Cold and DarkSeparation, Cold and Dark Building DemolitionBuilding Demolition Reactor Internals SegmentationReactor Internals Segmentation Large Component RemovalLarge Component Removal ISFSI Construction, Spent Fuel MonitoringISFSI Construction, Spent Fuel Monitoring License TerminationLicense Termination

ISOE-Europe 3/25/04 8 Limited Real Estate

ISOE-Europe 3/25/04 9

10 SONGS 1 ISFSI Location

ISOE-Europe 3/25/04 11 Control Building Demolition

ISOE-Europe 3/25/04 12 Control Room Panels, Final View

ISOE-Europe 3/25/04 13 Cutting up the Turbine Rotor

ISOE-Europe 3/25/04 14 Reactor Vessel Internals Segmentation

ISOE-Europe 3/25/04 15 ALARA Program Elements Sitewide: Applies to Operating Units and U1Sitewide: Applies to Operating Units and U1 –Job Planning –Dose Controls, Administrative Limits –Temporary Shielding –Pre-job Briefings –Dose Estimates Goal-setting and job performanceGoal-setting and job performance –Mockups and Training

ISOE-Europe 3/25/04 16 Unit 1 ALARA Issues Removed high dose components firstRemoved high dose components first Temporary shieldingTemporary shielding –Greater loading than operating units –Simpler approval process Airborne contaminationAirborne contamination –Reduced beta/gamma component, relative increase in alpha emitters

ISOE-Europe 3/25/04 17 Major Projects and Exposure Totals

ISOE-Europe 3/25/04 18 Radiation Exposure Summary

ISOE-Europe 3/25/04 19 Typical materials for a decommissioning project:

ISOE-Europe 3/25/04 20 LLRW Shipments to date

ISOE-Europe 3/25/04 21 Large Component Removal Reactor Pressure VesselReactor Pressure Vessel –Reactor Pressure Vessel Head Three Steam GeneratorsThree Steam Generators PressurizerPressurizer –S/G and PZR by rail –RPV Head by truck –RPV shipment delayed indefinitely

ISOE-Europe 3/25/04 22 RPV out of Sphere

ISOE-Europe 3/25/04 23 Steam Generator Removal

ISOE-Europe 3/25/04 24 Reactor Vessel Head Lift

ISOE-Europe 3/25/04 25 Disposal of Large Components

ISOE-Europe 3/25/04 26   We know what to do with the Class A and Class B/C waste. None of the waste is unique to decommissioning.   We know how to handle GTCC and Spent Fuel, and what to do with large components.   The new issue is dispositioning the very large volume of potentially clean material.   High cost of surveying, decontaminating materials   No standards for the clearance of potentially contaminated volumetric materials   Routine ALARA programs are adequate for decommissioning, with minor modifications

ISOE-Europe 3/25/04 27 Return to “Forward to the Past”