Kernkraftwerk Stade FRAMATOME ANP Kernkraftwerk Stade FULL SYSTEM

Kernkraftwerk Stade FRAMATOME ANP

Kernkraftwerk Stade FULL SYSTEM DECONTAMINATION (FSD) OF THE PWR STADE PRIOR TO DECOMMISSIONING AREVA Group Christoph Stiepani (Framatome ANP*) Wolfgang Schappert (E. ON Kernkraftwerk Stade) Essen, March 15 -17, 2006 * Framatome ANP, an AREVA and Siemens company FRAMATOME ANP

Why FSD prior to Decommissioning? Kernkraftwerk Stade > > > > > ALARA reasons Active waste is concentrated on resins Increase material volume for free release process Waste minimization during post-treatments No sophisticated disassembling techniques required Simplified health physics measures Minimize space onsite for post-treatments and storage Facilitate and speed up authority approval process Decommissioning schedule shortened High Cost Savings FRAMATOME ANP Christoph Stiepani – Services - FSD Stade – Essen March 15 -17, 2006 3

When FSD? Kernkraftwerk Stade FSD shall be planned as early as possible after final shut down Why? Functionality / integrity of systems and components Plant personnel available with intimate plant knowledge and operation skills FRAMATOME ANP Christoph Stiepani – Services - FSD Stade – Essen March 15 -17, 2006 4

E. ON NPP Stade Decision for FSD Kernkraftwerk Stade KKS Decontamination Workshop June 2003 - Review of all decontamination technologies on world market available - NPP Field Experiences - Maine Yankee (USA) - Reprocessing Plant WAK (Germany) - Muehlheim Kärlich (Germany) - Connecticut Yankee (USA) - Wuergassen (Germany) - Barsebaeck (Sweden) FRAMATOME ANP Christoph Stiepani – Services - FSD Stade – Essen March 15 -17, 2006 Decision for Framatome with CORD® Family and AMDA® 5

Why FSD with CORD Family and AMDA? Kernkraftwerk Stade > High experience and qualification of process, equipment and personal (more then 500 applications since 1976) > > Excellent references world wide High decontamination factors High material compatibility CORD Family can be tailored to all circumstances (e. g. base materials) > High acceptance by authorities > Minimum waste > Controlled base metal attack can be initiated if required (Framatome patented process) > Decon chemical decomposed with UV (Framatome patented process) > No chelates on resin waste > Simple AMDA interface NPP systems to be operated during FSD FRAMATOME ANP Christoph Stiepani – Services - FSD Stade – Essen March 15 -17, 2006 6

Framatome’s Decontamination References Kernkraftwerk Stade FRAMATOME ANP Christoph Stiepani – Services - FSD Stade – Essen March 15 -17, 2006 7

CORD Family Concept Kernkraftwerk Stade FRAMATOME ANP Christoph Stiepani – Services - FSD Stade – Essen March 15 -17, 2006 8

CORD Family Concept Kernkraftwerk Stade FRAMATOME ANP Christoph Stiepani – Services - FSD Stade – Essen March 15 -17, 2006 9

Framatome Decontamination Process HP/CORD UV Kernkraftwerk Stade FRAMATOME ANP Christoph Stiepani – Services - FSD Stade – Essen March 15 -17, 2006 10

Framatome Decontamination Equipment AMDA Kernkraftwerk Stade FRAMATOME ANP Christoph Stiepani – Services - FSD Stade – Essen March 15 -17, 2006 11

AMDA Control Panel for FSD at Stade Kernkraftwerk Stade FRAMATOME ANP Christoph Stiepani – Services - FSD Stade – Essen March 15 -17, 2006 12

Work Sequence Kernkraftwerk Stade > Phase 1: Feasibility Study § § § Target definition § Demonstration of decon effectiveness on NPP Stade active samples Analysis of boundary conditions Compilation of decontamination concept (process engineering and decontamination process) > Phase 2: Compilation of Detailed Procedures § § § Process related detailed process planning Work sequence plan Scope of responsibilities etc. > Phase 3: Performance Preparation § § Hardware / chemical procurement Qualification / training > Phase 4: Decontamination Performance FRAMATOME ANP Christoph Stiepani – Services - FSD Stade – Essen March 15 -17, 2006 13

Nuclear Power Plant Stade - Characteristics Kernkraftwerk Stade > PWR 4 loop design > Net performance 680 MW > Years of operation 1972 to 2003 > Reactor Supplier: Siemens Decommissioning Start 2005 FRAMATOME ANP Christoph Stiepani – Services - FSD Stade – Essen March 15 -17, 2006 14

FSD Stade – Decontamination Targets Kernkraftwerk Stade > Minimization of dose rate at components and systems § Minimization of personnel exposure during decommissioning planning § Minimization of personnel exposure during disassembling and posttreatments > No significant change in gamma/alpha ratio > Facilitate further disassembling / transport (SGs are key components) > Maximize material volume for free release process FRAMATOME ANP Christoph Stiepani – Services - FSD Stade – Essen March 15 -17, 2006 15

FSD at PWR Stade Decontamination Scope - System Data Kernkraftwerk Stade FRAMATOME ANP Base Material System Area ( approximate values ) m² ft² Incoloy 800 Steam Generator (SG) 12, 000 129, 000 Austenitic weld cladding SG channel heads, loop, RCP 1, 000 10, 700 Austenitic Cr. Ni steel Service and auxiliary systems 4, 000 43, 000 Christoph Stiepani – Services - FSD Stade – Essen March 15 -17, 2006 16

FSD at PWR Stade Flow Principle Kernkraftwerk Stade System Volume: 310 m³ (81, 900 gal) FRAMATOME ANP Christoph Stiepani – Services - FSD Stade – Essen March 15 -17, 2006 17

FSD at PWR Stade Results for Corrosion Products – Activity and DFs Kernkraftwerk Stade After 4 Cycles HP/CORD UV Dissolution of Corrosion Products and Activity Total corrosion products 609 kg Total activity 2, 7 E 13 Bq (730 Ci) with >90% Co-60 Decontamination Factors DF overall > 58 *) DF Primary circuit > 74 *) DF SG tube section > 160 *) DF auxiliary systems > 38 *) DF ambient dose rate (DRF) > 75 *) Gamma / ALPHA ratio No significant range *) Final dose rate measurements without shielding. Actual decontamination factors are much higher. FRAMATOME ANP Christoph Stiepani – Services - FSD Stade – Essen March 15 -17, 2006 18

High Planning Safety for Applying HP/CORD UV Kernkraftwerk Stade Activity inventory Planning Actual 2, 5 E 14 Bq 2, 7 E 13 Bq (conservative planning value) Corrosion products inventory 645 kg 609 kg Ion exchange resins 16 m³ 15, 4 m³ Personal Dose Exposure 90 m. Sv (226, 6 m. Sv)* 96, 5 m. Sv (152, 5 m. Sv)* * including additional activities FRAMATOME ANP Christoph Stiepani – Services - FSD Stade – Essen March 15 -17, 2006 19

FSD at PWR Stade Results for achieved DF at SG Tubing Area Kernkraftwerk Stade Average DF of DF 160 is dominated by interference of plugged tubes of SG 3 FRAMATOME ANP Christoph Stiepani – Services - FSD Stade – Essen March 15 -17, 2006 20

FSD at PWR Stade SG 3 - Position Plugged Tubes Kernkraftwerk Stade Tube Plugging Year 16% plugged tubes FRAMATOME ANP Christoph Stiepani – Services - FSD Stade – Essen March 15 -17, 2006 21

FSD at PWR Stade Dose Rates of SG 3 (16% plugged tubes) before and after Decontamination Kernkraftwerk Stade Dose Rates before FSD red marking: SG secondary side full black marking: SG secondary side empty Dose Rates after FSD with HP/CORD UV red marking: SG secondary side empty blue marking: SG secondary side full FRAMATOME ANP Christoph Stiepani – Services - FSD Stade – Essen March 15 -17, 2006 22

FSD at PWR Stade Dose Rates of SG 1, 2, 4 (2% plugged tubes) after Decontamination Kernkraftwerk Stade Tube Plugging year Dose Rates after FSD with HP/CORD UV Dose Rates before Decontamination in a range of 1, 800 to 2, 800 µSv/h Dose Rates between 5 and 20 µSv/h; except plugged tube area FRAMATOME ANP Christoph Stiepani – Services - FSD Stade – Essen March 15 -17, 2006 23

Decon Factors and Dose Rates after 4 HP/CORD UV Cycles Loop 4 Kernkraftwerk Stade Note: All dose rates in m. Sv/h; *dose rate estimated by KKS radiation protection SG hot leg SG cold leg Before 2, 8* After 0, 008 DF 373* Before 1, 8* After 0, 006 DF 300* SG hot leg Before 1, 8 After 0, 005 DF 400 SG cold leg Before 2, 8 After 0, 008 DF 373 Before 0, 9 After 0, 061 DF 15 Before 0, 25 After 0, 02 DF 13 Before 1, 3 After 0, 023 DF 57 Before 1, 7 After 0, 055 DF 31 FRAMATOME ANP Christoph Stiepani – Services - FSD Stade – Essen March 15 -17, 2006 Before 0, 15 After 0, 01 DF 15 24

Dose Rate in SG Water Boxes (before and after Decontamination) Kernkraftwerk Stade FRAMATOME ANP Christoph Stiepani – Services - FSD Stade – Essen March 15 -17, 2006 25

SG Channel Head after Decontamination Kernkraftwerk Stade Smearable Contamination << 50 Bq/cm² Co-60 as minimum FRAMATOME ANP Christoph Stiepani – Services - FSD Stade – Essen March 15 -17, 2006 26

FSD of the PWR Stade Decontamination Results – Ambient Dose Rates Kernkraftwerk Stade DRF without Interference: 120 FRAMATOME ANP Christoph Stiepani – Services - FSD Stade – Essen March 15 -17, 2006 27

Conclusion -1 Kernkraftwerk Stade > Decon Circuit Stade with a volume of 310 m³ and a surface of 18, 000 m² represents one of the largest decontamination systems > HP / CORD UV gives excellent results for primary circuit and auxiliary systems All decontamination targets surpassed or met > Outstanding results, especially for DRF with > 75 no other decontamination came even close > Very low surface contamination after decontamination (<< 50 Bq/cm² Co-60 as minimum) > Excellent teamwork between Stade and Framatome during all phases of the project ensured successful performance FRAMATOME ANP Christoph Stiepani – Services - FSD Stade – Essen March 15 -17, 2006 28

Conclusion -2 Kernkraftwerk Stade > FSD is a must before any Decommissioning Activities > FSD performance as early as possible after final shut down > Extreme low ambient dose rates with HP/CORD UV > Extreme low contact dose of components with HP/CORD UV > No sophisticated disassembling techniques required after FSD > Approval by authority is more simplified > Free release of heavy components is facilitated > Waste generation during following disassembling / treatment minimized > High cost benefits for customer FRAMATOME ANP Christoph Stiepani – Services - FSD Stade – Essen March 15 -17, 2006 29

Assignability of FSD Stade on NPPs in Operation Kernkraftwerk Stade > HP/CORD UV is a standard decon process for operational NPPs § § Process applicable for all NPP designs High material compatibility > HP/CORD UV already applied for 6 FSD in NPPs in operation § § 1 VVER (AEE design) 5 BWR (GE, ABB, Toshiba design) > FSD also in NPPs in operation for sustainable dose management § § § Ambient dose reduction and dose reduction on components / systems Low recontamination rate Combination of FSD and following water chemistry measures is recommended FRAMATOME ANP Christoph Stiepani – Services - FSD Stade – Essen March 15 -17, 2006 30

Positive Effect of FSD on Personnel Exposure for NPPs in Operation Kernkraftwerk Stade FRAMATOME ANP Christoph Stiepani – Services - FSD Stade – Essen March 15 -17, 2006 31