ML041210099

License Termination Plan Meeting Slides

ML041210099
Person / Time
Site:	Rancho Seco
Issue date:	04/28/2004
From:	Sacramento Municipal Utility District (SMUD)
To:	NRC/FSME
References
-RFPFR
Download: ML041210099 (32)

Text

Rancho Seco Nuclear Generating Station License Termination Plan Meeting with NRC April 28, 2004

Purpose of the Meeting

• Open lines of communication with the NRC

• Review site features and decommissioning status

• Discuss current decommissioning goals

• Discuss LTP development

• Obtain NRC feedback

• Discuss future interactions 2

Agenda

• Rancho Seco Features

• Decommissioning Approach

• Decommissioning Status

• Project Organization

• License Termination Approach

• HSA /Site Characterization

• Dose Modeling

• Final Status Survey

• Projected Schedule

• Future Meetings Steve Redeker Steve Redeker Dennis Gardiner Dennis Gardiner Dennis Gardiner Einar Ronningen Einar Ronningen Einar Ronningen Bob Jones Bob Jones 3

Rancho Seco Operations Babcock & Wilcox Reactor 963 MWe Initial criticality September 1974 1975 Began commercial operation April Numbers of fuel cycles 7

Shut down permanently Effective Full Power Days Received POL June 1989 2,149 (<6 yrs.)

March 1992 Began dismantlement Completed dry fuel transfer February 1997 August 2002 4

Rancho Seco Site Features

• 2,480 acre owner-controlled area

- Industrial Area - 87 acres

- ISFSI (site-specific 10 CFR Part 72 license) - 9/10 acre

- Photovoltaic plant - 50 acres 500 MWe gas-fired plant (under construction) - 30 acres

- Rancho Seco switchyard is a major intertie with the Western Grid 560 acre park with 160 acre-feet recreational lake 100 acres are impacted I

• Dry site (i.e., no major waterways nearby)

• Deep water table (140 - 160 feet; very little recharge from local rainfall)

• SMUD will retain site ownership 5

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Decoommi ss ioning Approach

• Started dismantlement activities in 1997

• Small staff 100 SMUD (including Security)

- -80 Contractors

• No radioactive waste ever sent to Barnwell

• License Termination Plan: phased approach

- Phase I (2008)

• Complete major physical activities

• Store Class B & C radioactive waste onsite

• Release site except Interim Onsite Storage Building (IOSB)

• Possibly defer Reactor Building based on characterization

- Phase 11 (2030)

• Release remainder of site

• license termination 14

Decommissioning Approach

• Major concrete buildings will remain in place

• SMUD will continue to use the site (office buildings, gas plant, etc.) for other utility-related activities

• Public interest 15

Major Activities & Status

• Turbine Building - system removal completed

• Reactor Building - system removal 9 1 % complete

• Auxiliary Building - equipment removal 88%

complete

• Reactor Vessel & Internals

- Reactor Vessel Head cut into 5 pieces & shipped to Envirocare for disposal

- Internals segmentation contract to Transnuclear, Inc. is pending 16

Major Activities & Status (continued)

• Pressurizer removed for disposal March 2004

• Spent fuel pool water processing completed

• Spent Fuel Pool Liner removal continues

• Radioactive waste shipped to Envirocare for disposal 17

Major Decommissioning Activities Dry Fuel Storage S

S Non-Radioli Turbine Bldg Tank Farm Auxiliary Blde-

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Reactor Buildina M

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• Large Components _

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Phase I Site Relk la Phase 11 iase I

Site Release 1/97 1/98 1/99 1/00 1/01 1/02 1/03 1/04 1/05 1/06 1/07 1/08 1/09 ; f 1/31 18

Remaining Major Tasks

• Reactor Vessel Project

- Internals (2004-2005)

- Vessel (2005-2006)

• Steam Generators (2005-2006)

• Spent Fuel Building & Pool

• Systems and components

- Buried & Embedded Piping

- Ventilation

• Building decontamination

• Final Status Surveys 19

Total Remaining Costs

• Total work remaining: $222.4M

• Trust fund: $91M

• Annual funding rate: $27M

• Last payment in 2008

• SMUD Board of Directors has authority to adjust funding rate (i.e., not PUC regulated) 20

Rancho Seco Organization Quality Assurance I

James Shetler AGM, Energy Supply I Steve Redeker Manager, Nuclear Pbnt Closure and Decommissioning I

I 1

I Dennis Gardiner James Field Project Manager Su'perintendent, Nudear Decommissioning j

Engineering, Pbnt Support l

l Geof Roberts Michael Bua Superintendent Superntendent, Nudear Nuclear Maintenane RPChemistqy

-I-Jeny Deiezenski Superintendent, Nudear Quality, Licensing & Administration 21

Proj ect Organization Leslie England Coordinator, Project Controls Decommissioning 22

License Ternination Approach

• Phase I

- Complete major decommissioning activities

- Submit LTP to NRC

- FSS for site except Interim Onsite Storage Building

• Phase II

- Store Class B & C radioactive waste in Interim Onsite Storage Building (IOSB)

- Ship Class B & C waste for disposal

- FSS for Interim Onsite Storage Building

• Survey to MARSSIM guidance and site-specific DCGLs

- 25 mrem/yr (for all pathways included in dose model)

- ALARA 23

LTP Development

• Consistent with NRC Guidance Documents

- Regulatory Guide 1.179 - LTP format & content

- NUREG-1 700 - Standard Review Plan for LTPs

- NUREG-1757 - NMSS Decommissioning Guidance

• Use previous industry experience

• Developed RAI database

• Maintain ongoing communications with NRC

• Incorporate NRC feedback

• Minimize NRC RAIs 24

HSA and Site Characterization

• HSA considers:

- Prior site survey data 10 CFR 50.75(g) required records

- Personnel interviews (150 observations)

• HSA provides input into site characterization

• The HSA report will be summarized in the LTP

• Site Characterization:

- Identifies ongoing sampling and measurement needs

- Provides the basis for area and survey unit classification

- Supports remediation planning 25

Site Characterization Summary

• No known groundwater contamination

• Reactor Building activated concrete

• Impacted soil

- Onsite

- Outside of Industrial Area from liquid effluent releases

• Sub-surface soil contamination 26

27

Dose Modeling

• SMUD will retain site ownership and continue to use site

• Industrial worker scenario

- structures

- soils

• Computer Codes

- RESRAD

- RESRAD-BUILD

- DandD

• Probabilistic Mode for sensitivity analysis 28

Dose Modeling (cont.)

• Basis for site-specific input parameters

- Radionuclide mix

- Geology, hydrology, meteorology, etc.

• Hydrogeology

- Previous studies

• Original siting

• Proposed evaporation pond

- Bring in a hydrogeologist

• Confirm no groundwater contamination

• Additional wells based on hydrogeologist recommendations

• NRC guidance

- NUREG-1757, Volume 2-Decommissioning guidance NUREG/CR-5512 - computer code comparisons

- NUREG/CR-6697 - probablistic distributions for RESRAD 29

Final Status Survey Development

• Based on MARSSIM

- DQO process

- Survey unit classification

• Anticipated site conditions at time of FSS

- Major concrete structures in place

- Temporary buildings removed

- Maintain site as an industrial facility

• Monitoring instrumentation

• FSS plan contained in LTP 30

Projected Schedule Submit LTP June 2005 Public meeting NRC issue RAIs RAI response October 2005 March 2006 June 2006 NRC approves LTP Complete Phase I - FSS Complete Phase II - dispose of Class B & C waste; FSS for IOSB December 2006 December 2008 Based on suitable disposal site (2030) 31

Future Meeting Topics

• Site Characterization

• Dose Modeling

• Hydrogeologic investigations and groundwater monitoring

• Final Status Survey

• Routine conference calls to discuss status and resolve issues

• NRC visit to Rancho Seco site 32