RAW management, decontamination techniques and methods used at SSE ChNPP

Transcription

1 RAW management, decontamination techniques and methods used at SSE ChNPP

2 RAW management at ChNPP Interim storage High-level waste (HLW) Low- and intermediatelevel waste (LILW) Below exemption level LLW SLW Geological disposal Near-surface disposal Processing or disposal without radiological restrictions

3 RM and RAW management facilities existing at ChNPP Storage facilities: Liquid waste storage facility; Liquid and solid waste storage facility; Solid waste storage facility; Temporary storage facility for solid HLW; Temporary storage facility for HLW and LIL-LLW. Accumulated LRW: more than m 3; Accumulated SRW: in SWSF m 3 ; in TSF for solid HLW m 3

4 RM and RAW management facilities existing at ChNPP Places of RM and RAW temporary storage: sites for temporary storage of large-sized contaminated equipment; site for temporary storage of process materials (PMTSS); temporary storage facility for oil-fuel mixture in the first generation Diesel Power Plant; warehouse for temporary storage of spent radioactive oil; place for temporary (buffer) placement of VS-2 fragments.

5 Facilities under construction LRW Treatment Plant with capacity of 42 RAW packages per day (200-l drums); SRW Processing Plant with capacity of 3 RAW packages per day (container 3 m 3 ); Upgrades to the Long-length Waste Cutting Facility; Free release - Facility for material release from regulatory control; Installation for Shelter water and evaporated concentrate purification from TUE and organic compounds.

6 Liquid Radioactive Waste Treatment Plant (LRTP) The design capacity of the Plant is 42 drums per day. The technology is based on RAW cementation. The volume of one package is 200 liters.

7 Industrial Complex for Solid Radioactive Waste Management (ICSRM) Lot 0 - temporary storage facility for high-level and low-interimediate-level long-lived waste (TSF for HLW and LIL-LLW); Lot 1 - installation for solid radioactive waste retrieval from SWSF (SWRI); Lot 2 - solid radioactive waste processing plant (SWPP); Lot 3 Engineered near-surface disposal facility for solid radioactive waste (ENSDF).

8 Industrial Complex for Solid Radioactive Waste Management (ICSRM) SWRI design capacity is up to 3 m 3 per day. Operations performed at SWPP: waste receiving (from SWSF and ChNPP facilities), sorting, characterization, fragmentation, compaction, incineration, packaging in containers (3 m 3 ), transportation for disposal to ENSDF.

9 Complex on manufacturing steel drums and reinforced concrete containers for radioactive waste storage / disposal commissioned. Auxiliary facilities

10 Auxiliary facilities Packing sets: 165-l drum (PU-0,165 I) material steel 08 kp; 165-l drum (PU-0,165 II) material steel 12Х18Н10Т; 200-l drum (VU-0,2 III) material steel 12Х18Н10Т; 200-l drum(mb-0,2 IV) material steel 08 kp; Container KZ-3: effective volume 3.0 m 3.

11 Radioactive oil Radioactive water Build.81 (SVO-4) LRW management Main building ISF-1 LWSF (Struct..83) LRTP LSWSF (Build.84) Ash after incineration with other processed SRW in KZ- 3.0 Drums 0.2 m 3 (cemented LRW) ENSDF (Lot-3) SWPP incineration installation

12 Planned streams LRTP Special sewage system s radioactive water management Units 1 and 2 Unit 3 Shelter Object SWPP and SWRI ISF-1 ISF-2 LWSF (Struct.83) LSWSF (Build.84) Installation for purification from TUE and organics Build.87 Build.81 (SVO-4) Pure condensate for ChNPP consumers LRW (evaporation concentrate) in LWSF

13 From LRTP From SO and NSC Solid RAW and PM management ISF-2 Main building RWDF Buryakovka TSF for HLW and LIL-LLW in LSWSF (Lot-0) SWRI and SWPP (Lot-1 and Lot-2) Shelter Object TSF for HLW and LLW (Vektor complex) ENSDF (Lot-3) PMTSS

14 Specificity of ChNPP equipment radioactive contamination Specificity of ChNPP equipment and materials is defined by presence of operational and accident contamination, namely: Operational contamination after the shutdown of reactor and discharge of primary circuit is defined mainly by depositions of radioactive corrosion products at the surface of process equipment. The operational contamination is typical for equipment of reactor, turbine compartments and internal surfaces of special water purification equipment. Accident contamination occurred as a result of 1986 accident radioactive substances having been a part of the release, deposited and fixed at outer surfaces of equipment, building structures, as well as at outer surfaces of ventilation equipment.

15 ChNPP decontamination areas

16 Decontamination techniques and methods used at SSE ChNPP Chemical techniques Electrochemical techniques Physical techniques Steam-ejector Bath (immersion) Abrasive cleaning Jet Immersion (bath) Non-bath (with outer electrode) Hydromechanical Ultrasonic

17 Flow diagram of decontamination Spent decont. solutions LWSF Building 81 RCW Equipment upon request for decontamination Selection of decontaminati on technology Preparation of equipment for decontamination Preparation of decontaminating solution Decontaminati on Washin g Dosimetry measurement Products 18; 41; 42; 43; 57. Products 18; 57 Product 41 No Result achieved Yes Pr. 18 compressed air Pr demineralized water Pr sodium hydroxide Pr. 43 nitric acid Pr steam RCW - radioactively contaminated water RCEM - radioactively contaminated equipment and materials RCEM Sending to consumer Clean equipment

18 Shortcomings of the existing decontamination system 1. The existing decontamination systems enable to perform small-scope decontamination activities mainly for equipment with small dimensions, and do not enable to perform large-scale decontamination of the dismantled equipment with the purpose of its subsequent release from regulatory control. 2. Characteristics of the existing decontamination units equipment do not enable to decontaminate equipment with firmly fixed contamination.

19 Shortcomings of the existing decontamination system 3. The existing decontamination equipment is outdated and its operation leads to significant economic costs and energy consumption, generation of a large amount of secondary waste. 4. Without steam supply from IHP, operation of decontamination baths at areas of Building 87 and Block E is inefficient, while steam-ejector spraying is impossible.

20 Measures taken to address the current problems As part of the Feasibility Study: analysis of the need in new additional facilities for RCEM and RAW management; identification of the necessary facilities/installations for RCEM and RAW management (including their capacity and the necessary technologies); selection of sites for their location.

21 Planned RCEM and RAW management facilities Additional complex for processing of radioactively contaminated equipment and materials will consist of: Unit for RAW acceptance, temporary storage and radiation monitoring; Unit for sorting and fragmentation; Unit for decontamination of metal; Unit for pasportization; Unit for decontamination of large-sized reinforced concrete items; Unit for cable products processing; Unit for metal melting; Temporary storage for containers with LIL-LLW; Temporary storage for containers with HLW; Buffer storage facility for LIL-SLW.

22 Planned facilities for RCEM and RAW management Chemical decontamination facility of ONET company Shot-blasting decontamination box

23 Planned volumes of dismantling activities Building Total weight, t stainless steel, t By specific materials carbon steel, t cast iron, t Unit Unit Unit Auxiliary structures Total nonferrous materials, t

24 RM release from regulatory control at ChNPP Dismantling, processing and release from regulatory control of Unit 1 TH and DPP-1 equipment and structures (Contractors: PE PromMetBud - TH 1; Montazh-Energobud - DPP-1) Dismantled and transported for decontamination, t (from ) Decontami nated, t Referred to RAW, t At decontaminatio n, t Released from regulatory control, t

25 RM release from regulatory control at ChNPP Development of techniques and procedure for RM release from regulatory control will be implemented within the frame of International Technical Assistance (ITA). This project is predecessor for the next project U4.01/11-E Creation of a free release facility at ChNPP signing of a Contract with ENVINET (Czech Republic) on creation of a facility for material release from regulatory control at SSE ChNPP (Project code U4.01/10В+С).

26 Planned flowchart for RCEM and SRW management at ChNPP Main building of ChNPP ChNPP site ISF-1 SO SO site Non-processable LIL- SLW Collection and preliminary sorting of waste arrived at FS&P stage Collection and preliminary sorting of waste during SIP implementation Combustible, compactable LIL-SLW PM Combustible, compactable LIL-SLW Sorting and radiological measurement station Concrete LIL-SLW cables LIL-SLW metal LIL-LLW and HLW Decontamination Insulation removal Fragmentation Insulation LIL-SLW metal Analysis LIL-SLW metal Analysis Decontamination LIL-SLW concrete LIL-SLW metal Released waste Free release facility Melting Released metal waste Analysis LIL-SLW metal RWDF Buryakovka SWSF ISF-2 LRTP PMTSS LIL-SLW, LIL-LLW and HLW RAW retrieval installation SWPP SRW sorting and processing installations LIL-SLW LIL-SLW metal LIL-LLW, HLW ICSRM LIL-SLW TSF for solid HLW Build. 12 TSF for HLW and LIL-LLW Build. 84 ENSDF Geological storage facility for HLW and LIL-LLW TSF for LIL-LLW and HLW in Turbine Hall

27 Thank you for your attention!