CURRENT STATUS OF THE DEVELOPMENT OF A NEW LILW REPOSITORY IN ROMANIA

Transcription

1 Ministry of Economy Nuclear Agency and Radioactive Waste CURRENT STATUS OF THE DEVELOPMENT OF A NEW LILW REPOSITORY IN ROMANIA Antonius GHEORGHE-SORESCU Senior advisor, ANDR NucInfoDay 2017, Acceptanţa publică, o etapa esenţială în derularea proiectului DFDSMA, septembrie 2017, Consiliul Judetean Constanţa

2 CONTENT INTRODUCTION LEGISLATIVE AND REGULATORY SYSTEM SHORT HISTORY OF THE REPOSITORY PROGRAM MAIN CURRENT ASPECTS OF THE REPOSITORY PROGRAM NEXT STEPS IN THE DEVELOPMENT OF THE REPOSITORY CONCLUSIONS 2

3 Legislative and regulatory system NATIONAL COMMISSION FOR NUCLEAR ACTIVITIES CONTROL (CNCAN) regulatory body in the nuclear field NUCLEAR AGENCY AND RADIOACTIVE WASTE (ANDR) Promoter of the nuclear energy development in Romania (power and non power applications), exclusively for peaceful purposes Responsible for disposal of spent nuclear fuel (SNF) and radioactive waste (RW), and ensure at national level the coordination of the nuclear installations decommissioning processes Waste producers manage their own radioactive waste from its generation until disposal 3

4 ANDR Established in August 2004; Specialized body of the central public administration financed mainly by waste producers; Under authority of the Ministry of Economy; Elaborates and update at least every 5 year the National Strategy for safe management of radioactive waste; Develop and implement technical solutions for safe disposal both of spent nuclear fuel and radioactive waste; Maintain an update inventory of RW. 4

5 Basic principle Basic principle of radioactive waste disposal in Romania (CNCAN, Norms regarding classification of RW, 2005): VLLW: less complex arrangement than LILW-SL; LILW-SL: near surface disposal facility; LILW-LL and SNF: geological repository; SNF is considered RW; Import of RW is forbidden. 5

6 National strategy on the safety of SNF management and on the safety of RW management Legend: Red arrows: SNF; Yellow arrows LILW-LL; Blue arrows: LILW-SL. The red boxes are infrastructure that is planned but not yet built, subject to further approvals 6

7 DFDSMA Repository Program Short history 7

8 Authorization procedure of near surface disposal facilities The phases associated with the life of a repository are (Order 400/2005, CNCAN): Siting (SAR, description of the conceptual design, conceptual plan for closure, site selection studies, environmental agreement, management system conceptual plan, any other document request by CNCAN); Construction (revised SAR, preoperational environment monitoring program, management system conceptual plan, any other document requested by CNCAN); Operation (SAR, technical operating procedures, program of control of systems on the safety, revised conceptual plan for closure, waste acceptance criteria, limits and condition for operating, intervention plan in case of radiological events, environmental licence, any other document requested by CNCAN); Closure (SAR, environment monitoring program, detailed closure plan, limits and conditions for closure, program of control of systems and components on the safety in post closure, any other document requested by CNCAN) Active institutional control (SAR, environment monitoring program, program of control of systems and components on the safety in post closure, any other document requested by CNCAN) 8

9 Siting process in brief (1/2) 1992 The Dobrogea region was selected in a regional mapping stage; the site selection process identified 37 potentially sites; Nuclearelectrica National Company supported a R&D program for siting a new LILW repository for Cernavoda NPP sites were suitable (Saligny, Cernavoda and Mireasa); candidate sites were selected (Cernavoda and Saligny); 1997 Preference was given to Saligny site 1998 Nuclearelectrica submitted to CNCAN a site license application; CNCAN requested for the environmental agreement and made requirements and comments for the review of the safety assessment; The site selection process slowed down after 1998, due to mostly nontechnical reasons ANDRAD requested the assistance of the IAEA through WATRP to assess the development of the repository; 9

10 Siting process in brief (2/2) 2009 A WATRP peer review of ANDRAD s documentation and technical programme for the development of a near-surface repository for lowand intermediate-level radioactive waste at Saligny, Romania The following activities were undertaken taking into account the recommendations issued by the WATRP mission: A preoperational monitoring programme for Saligny site was elaborated; The Saligny site was characterized; The conceptual design of the new LILW/SL disposal facility was reviewed; The waste inventory to be disposed of at Saligny new LILW/SL disposal facility was updated; The safety assessment report was reviewed; A feasibility study for the Saligny new LILW disposal facility was elaborated. 10

11 IAEA WATRP peer review missions The overall conclusions 2007 The Saligny site has a reasonable prospect of being a suitable site for disposal of short-lived low- and intermediate-level wastes [ ] significant technical progress has been made by ANDRAD in recent years, against a background of resource limitations. [ ] nothing indicates that construction of a safely engineered nearsurface disposal facility would not be possible at Saligny 11

12 MAIN CURRENT ASPECTS OF THE REPOSITORY PROGRAM 12

13 General information Cernavoda NPP Saligny site Toward Cernavod a site Saligny Village Waste inventory: LILW/SL with certain quantities of LL radionuclides generated by operation and decommissioning of 4 nuclear power units at Cernavoda NPP. 2 scenarios: 25 and 50 years of operation / unit. Site: Saligny site located between Cernavoda NPP and Saligny village (in the exclusion area of NPP). Land owners: Saligny Local Council and private owners (42ha disposal facility, 23ha repository) Disposal concept: Surface facility with multiple barriers 13

14 Saligny site investigations An geological and hydrogeological site model was developed, taking into account the new data obtained during the site investigations; The Saligny site Database developed in ANDR in the last years. 14

15 Raw waste Conditioned waste Reference scenario: 40 cells ( DM) m3 of final waste. Envelop scenario (conservative) 64 cells ( DM); m3 of final waste. Envelop scenario: estimated volumes of operational radioactive waste considered in reference scenario multiplied with 2 15

16 Disposal system - Administrative building Functions: Reception of the documents; Control the personnel and vehicles access; Control the physical protection of the repository; Administration of the objective; Ensuring the first aid in case of an accident; Public information point. The administrative building is a public building. The distance between the building and disposal cells should be estimated by the calculation to obtain 1 msv/year for administrative people. The surface of the administrative building is close to 1300m² in 2 levels. 16

17 Disposal system - The maintenance and common service building Functions: Assure the maintenance of all equipment; Provide power distribution; Storage of equipment and materials. The building area is 906m². All utilities (electricity; water etc) will arrive in this building.. 17

18 Disposal system Disposal cells Functions: Accommodate the waste. Inside dimensions of a cell: 27,9 m x 15,2 m x 5,1 m 18

19 Disposal cell Process 1/4 19

20 Disposal cell Process 2/4 Disposal module handling 20

21 Disposal cell Process 3/4 Fulfill the disposal cell with sand Roof concrete slab 21

22 Disposal cell Process 4/4 Wall closing 22

23 Disposal cell Final covering 23

24 CURRENT SAFETY ISSUES AND FINDINGS CNCAN requirements: to develop a Safety Case, which include all integrated documents necessary to support the siting license. Safety Assessment Report (SAR) developed for the siting stage of the repository is the main technical support documentation for the siting license. Safety Assessment Report of DFDSMA contains the evaluation of the normal and alternative evolution scenarios of the DFDSMA, both in the operational and post closure phases. Also, the impacts of the scenarios on the repository workers, public and the environment were evaluated. Normal evolution scenarios Alternative evolution scenarios Public Professionally exposed personnel 1 msv/y dose limit 0.3 msv/y- dose constraint (CNCAN Order no. 400/2005) 20 msv/y dose limit (CNCAN Order no. 14/2000) 5 msv/y dose constraint (design) 1 msv/y dose limit 0.3 msv/y- dose constraint (CNCAN Order no. 400/2005) 50 msv/y (Council Directive 96/29/EURATOM) 5 msv/y dose constraint (design) 24

25 Main conclusion of the safety assessment The results of the safety assessment demonstrate trough significant safety margins, the fact that Saligny site and the repository meet the characteristics that correspond to CNCAN s requirements. Calculations have shown that values of the effective dose likely to be received by the workers and by the population are below the limits imposed by CNCAN. 25

26 Estimated Costs for the new LILW/SL repository Total initial investment (infrastructure and first 8 cells): 75 M Total cost envelop scenario (64 cells): 344 M Financed by ANDR according to GD 1080/ prices 26

27 The way ahead - Approval of technical-economic indicators related to the near surface repository investment objective; - Start of the public procurement process for owner engineering (OE) services related to the near surface repository in order to get the construction licence (2018); - Start of the public procurement process for engineering, procurement and construction (EPC) contract type related to the construction of the 8 cells and the infrastructure (2020); The works related to the construction of the 8 cells, representing the basic investment, should start by 2020 aiming to put into operation the disposal facility by Finnally the repository should have 64 disposal cells coresponding to approx m3 of conditioned waste to accomodate. 27

28 CONCLUSIONS In the last period, the efforts of ANDR were focused to develop the integrated technical documentation necessary to be submitted to CNCAN. The evolution scenarios were evaluated, for normal and abnormal situations, for all repository lifetime periods. The radiation dose possible to be received by the repository workers or by the members of public are lower than the established dose constraints and dose limits. The Saligny site was investigated in order to decide if it can be adequate to host a near surface repository. Taking into account the performed evaluations, one can conclude that the Saligny site has the potential to be suitable for a near surface repository because there are no obvious deficiencies in respect with the specific safety requirements. 28

29 THANK YOU FOR YOUR ATTENTION! Contact ANDR: Bucureşti Bucharest OFFICE Str. I.D. Mendeleev, nr , sector 1 Tel.: , Fax: Mioveni OFFICE Str. Câmpului, nr. 1, CP , jud. Argeş Tel.: Fax: contact@nuclearagency.ro Str. I.D. Mendeleev, nr , sector 1 Tel.: , Fax: