San Onofre Unit 1 Decommissioning Eric M Goldin

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

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

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

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

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

Project Priorities • Protection of the spent fuel throughout the decommissioning period until DOE acceptance • Industrial health and safety • Disposal 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 requirements • Perform work in a reasonable and prudent manner ISOE-Europe 3/25/04 6

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

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

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SONGS 1 ISFSI Location ISOE-Europe 3/25/04 10

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

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

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

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

ALARA Program Elements • Sitewide: Applies to Operating Units and U 1 – Job Planning – Dose Controls, Administrative Limits – Temporary Shielding – Pre-job Briefings – Dose Estimates • Goal-setting and job performance – Mockups and Training ISOE-Europe 3/25/04 15

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

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

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

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

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

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

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

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

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

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

1. We know what to do with the Class A and Class B/C waste. None of the waste is unique to decommissioning. 2. We know how to handle GTCC and Spent Fuel, and what to do with large components. 3. The new issue is dispositioning the very large volume of potentially clean material. 4. High cost of surveying, decontaminating materials 5. No standards for the clearance of potentially contaminated volumetric materials 6. Routine ALARA programs are adequate for decommissioning, with minor modifications ISOE-Europe 3/25/04 26

Return to 1964 - “Forward to the Past” ISOE-Europe 3/25/04 27