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2008 ISOE EUROPEAN SYMPOSIUM. FI

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1 2008 ISOE EUROPEAN SYMPOSIUM. FI

2 2008 ISOE EUROPEAN SYMPOSIUM. FI
ALARA in the Dismantling of Nuclear Facilities Alejandro Rodríguez (ENRESA) 2008 ISOE EUROPEAN SYMPOSIUM. FI

3 In 1984, the Spanish Parliament took the decision to create a public company to undertake the management of the radioactive wastes generated in Spain and the dismantling of nuclear power plants. As a result the Empresa Nacional de Residuos Radiactivos, S.A. (ENRESA) was set up. This is a public non profit-making company whose shareholders are the Centre for Energy-related, Environmental and Technological Research (CIEMAT) and the State Industrial Holding Company SEPI. The main missions of ENRESA may be summarized as follows: Removal, transport, treatment, storage and disposal and control of the radioactive wastes generated in Spain. Dismantling of disused nuclear and radioactive facilities. Environmental restoration of uranium mines. Research and development.

4 “Closing the circle” Feedback in ALARA Process
PLANNING ALARA Forecasting Contractor/Performer RP&S Service OPERATING EXPERIENCE Feedback Verification of Criteria Preliminary data Compilation of information Specific training ALARA Study ALARA Group Meeting PREPARATORY PHASE SUBSEQUENT REVIEW Lessons learned Comparison with Forecasts ALARA Group Meeting Final ALARA Report CONTROL in PERFORMANCE Work Supervision Radiological Surveillance Dose evolution tracking ALARA Group Meetings Corrective actions 2008 ISOE EUROPEAN SYMPOSIUM. FI

5 ALARA COMMISSION (Management Level)
ENRESA ALARA ORGANISATION ALARA COMMISSION (Management Level) Director El Cabril Facility TECHNICAL DIVISION OTHER DIVISIONS CHAIRMAN enresa ALARA COMMISSION Management Level Vandellós NPP Installation Safety Department Decommissioning and Projects LMRW RP&S Serv. Manager RPTU Manager Special Activities FUNCTIONS and RESPONSIBILITIES Promotion of ALARA culture Approval and backing for Objectives Provision of resources Meets twice at year Reports to MANAGEMENT Committee Implicit to the concept of ALARA is the need for strong support from the Management in its widest sense, as well as its direct participation in the Programme implemented. The Management is responsible for ensuring compliance with the requirements of the competent authority, and in so doing may delegate certain functions to its subordinates, acting via the hierarchical framework. 2008 ISOE EUROPEAN SYMPOSIUM. FI

6 Decommissioning of Uranium Mines & Mills
Spanish Decommissioning Experience Decommissioning of Uranium Mines & Mills Andújar uranium mill, since March 1995 in Surveillance Period, with a minimum duration of 10 years Works period: from 1991 to 1995 Budget: 24 M€ M3 Restored: Initial situation Final situation 2008 ISOE EUROPEAN SYMPOSIUM. FI

7 Decommissioning of NPP´s: Vandellós-I Project
Spanish Decommissioning Experience Decommissioning of NPP´s: Vandellós-I Project Works Period: from 1998 to 2003 Budget: € Materials Involved: t Radwastes: t 2008 ISOE EUROPEAN SYMPOSIUM. FI

8 Decommissioning of Research Facilities
Spanish Decommissioning Experience Decommissioning of Research Facilities CIEMAT (Spanish Centre for Energy related, Environmental and Technological Research) Research Reactor Pilot Reprocessing Plant Conditioning and Storage Plant for Liquid Waste Dismantling works start in 2006 and will be completed by 2009 Budget: € Material Involved: t Radwastes: 460 t Research Reactor Liquid Radioactive Waste Storage Reprocessing Plant Liquid Radioactive Waste Conditioning Plant 2008 ISOE EUROPEAN SYMPOSIUM. FI

9 Decommissioning of NPP´s: Zorita Project
Spanish Decommissioning Experience Decommissioning of NPP´s: Zorita Project General Data Reactor Type: PWR Westinghouse One Loop Gross Electrical Power:160 MWe Containment Type: Dry Containment Construction: Reinforced Concrete with steel dome Spent Fuel Pool: Inside Containment Works Period Expected: from 2009 to 2015 Budget: 135 M€ Material Involved: t. Radwastes: 4031 t. 2008 ISOE EUROPEAN SYMPOSIUM. FI

10 2008 ISOE EUROPEAN SYMPOSIUM. FI
ALARA in Decommissioning The application of the ALARA principle and the Radiation Protection in decommissioning do not imply any significant novelty with respect to the way it is applied at other operating facilities. Although in practice several differences arise: The organization should be adapted to the new objectives of the project . The physical configuration of the facility is modified continuously: Loss of structural confinements (loss of isolation) Modification of the systems (Effluents, radiation surveillance, etc) The radiological status of the facility is continuously modified, and the radiological risks too Modification of the routes for personnel and materials Variation of the control areas 2008 ISOE EUROPEAN SYMPOSIUM. FI

11 2008 ISOE EUROPEAN SYMPOSIUM. FI
Vandellós I NPP Decommissioning Case. Evolution of Radiological Controlled Areas Finally these three next slides shows you a lot of data from the point of view: RP Opeartive Area, Radiological Measuremets Area, Environment Area 2008 ISOE EUROPEAN SYMPOSIUM. FI 2008 ISOE EUROPEAN SYMPOSIUM.FI

12 FUNCTIONS and RESPONSIBILITIES V1-NPP ALARA ORGANISATION
Vandellós I NPP Decommissioning Case. ALARA Organization (1) FUNCTIONS and RESPONSIBILITIES Dose objective proposals (V1-NPP) Periodically informed on: practices, ALARA studies, and Training Programmes, Analysis of results obtained Corrective actions Reporting to ALARA Commission Coordination V1-NPP Organisation Approval of indicators Participation and attendance in Training Meets (4 times/year) V1-NPP ALARA ORGANISATION Manager Vandellós-1 ALARA COMMITTEE ALARA Technical Manager RP&S Service Other Services and Areas Managers ENG+PO+PERF ALARA COORDINATOR ALARA AREA ALARA Technician 2008 ISOE EUROPEAN SYMPOSIUM. FI

13 FUNCTIONS and RESPONSIBILITIES
Vandellós I NPP Decommissioning Case. ALARA Organization (2) FUNCTIONS and RESPONSIBILITIES Set up through meeting, Proposals for improvements to be implemented, Reports to V1-NPP Management, Coordination of activities, Analysis of specific activities and Planning of specific tasks, Performance of the following: work tracking, and results analysis, Proposals for necessary improvements. 2008 ISOE EUROPEAN SYMPOSIUM. FI

14 2008 ISOE EUROPEAN SYMPOSIUM. FI
Vandellós I NPP Decommissioning Case. Criteria CRITERIA for identification of work subject to specific ALARA Tracking CONCEPT/CRITERION VALUE OBSERVATIONS 1.- Collective dose (mSvm) 10 Total Per RWP 2.- Maximum individual dose (mSv) 2 3.- Dose Rate (mSv/h) 1 In Area 4.- Removal superficial contamination Work Zones 4.1.- Beta-Gamma (Bq/cm2) 200 Accessible 4.2.- Alpha (Bq/cm2) 20 Surfaces 5.- Air-borne contamination (LDCA) 6.- Zone Classification Red Zone 7.- Duration of work (H-p) 1.200 Total Per RWP/WAR limited occupation zone 8.- On request by RP&S Service 2008 ISOE EUROPEAN SYMPOSIUM. FI

15 2008 ISOE EUROPEAN SYMPOSIUM. FI
Vandellós I NPP Decommissioning Case. Results ALARA Meetings during the project Year 1998 1999 2000 2001 2002 2003 Total ALARA COMMITEE N/A 4 5 2 19 ALARA GROUP 3 12 22 32 16 8 93 ALARA Meetings during the project 30 Studies have been performed ALARA Dose Total collective dose of the project 552,95 m. mSv Total collective dose of the dismantling activities 354,67 m. mSv Collective dose regulated under ALARA studies 261,67 m. mSv The 74% of the dose of dismantling operations has been controlled under the ALARA studies 2008 ISOE EUROPEAN SYMPOSIUM. FI

16 2008 ISOE EUROPEAN SYMPOSIUM. FI
Vandellós I NPP Decommissioning Case. Results 2008 ISOE EUROPEAN SYMPOSIUM. FI

17 2008 ISOE EUROPEAN SYMPOSIUM. FI
Vandellós I NPP Decommissioning Case. Cumulated Collective Dose 700 603,391 354,674 552,152 428,200 197,478 100 200 300 400 500 600 1998-T1 1998-T2 1998-T3 1998-T4 1999-T1 1999-T2 1999-T3 1999-T4 2000-T1 2000-T2 2000-T3 2000-T4 2001-T1 2001-T2 2001-T3 2001-T4 2002-T1 2002-T2 2002-T3 2002-T4 2003-T1 2003-T2 2003-T3 2003-T4 TIME man.mSv TOTAL PLANNED DOSE PDC TOTAL PDC (CONTRACTORS) TOTAL DOSE-DLD (CONTRACTORS+STAFF) TOTAL DOSE-TLD TOTAL DOSE-DLD (STAFF) Finally these three next slides shows you a lot of data from the point of view: RP Opeartive Area, Radiological Measuremets Area, Environment Area 2008 ISOE EUROPEAN SYMPOSIUM. FI 2008 ISOE EUROPEAN SYMPOSIUM.FI

18 Vandellós I NPP Decommissioning Case. Lessons Learned
RP CONTROLS and STANDARDS TRAINING and QUALIFICATION STEPWISE CONFIGURATION AND DEPRESSURE SYSTEMS VENTILATION STAGES OF UNDRESSING HERMETIC SEALING OF WORK AREAS EQUIPMENT AND SYSTEMS FOR CONTINUOUS SURVEILLANCE CONTROL BY BIOANALYSIS AND NASAL SMEARS 2008 ISOE EUROPEAN SYMPOSIUM. FI 2008 ISOE EUROPEAN SYMPOSIUM.FI

19 2008 ISOE EUROPEAN SYMPOSIUM. FI

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