EMRP JRP ENV54 METROLOGY FOR DECOMMISSIONING NUCLEAR FACILITIES (WP2, WP3)
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1 EMRP JRP ENV54 METROLOGY FOR DECOMMISSIONING NUCLEAR FACILITIES (WP2, WP3) CMI, CEA, ENEA, IFIN-HH, JRC, LNE, MIKES, NPL, PTB, SCK-CEN, STUK, ANDRA, EDF, ENVINET/NUVIA GROUP, REG(ENVINET) Jiri Suran (JRP ENV54 Coordinator) MetroDecom Workshop, November 2015, Trebic, Czech Republic 1
2 Nuclear decommissioning facts Shutdown reactors and facilities (August 2013): power reactors: 89 EU, 143 worldwide research reactors: 46 EU, 142 worldwide fuel facilities: 31 EU, 96 worldwide Operating reactors and facilities (August 2013): power reactors: 137 EU, 437 worldwide research reactors: 61 EU, 246 worldwide fuel facilities: 76 EU, 332 worldwide More than one third of the 137 reactors currently operating in the EU will need to be shut down by GlobalData s report shows that the European commercial nuclear decommissioning market value stands at more than 60,000 million EUR. 2
3 JRP ENV54 MetroDecom benefits The key direct benefit is improvement of capacity, accuracy, reliability and mobility of the measurement, which will result in more reliable decision-making concerning safe release and safe disposal of radioactive wastes into the environment with positive economic impacts. New rapid and precise free release measurement technologies will reduce the quantity of solid waste materials incorrectly sent to repositories (including recyclable) and minimize the disposal costs by about 10%, which would lead to savings of tens of millions of Euros for the decommissioning of a single NPP (1M 3 VLLW, LLW repository = EUR 5,000-30,000). 3
4 MetroDecom WP2, WP3 tasks Develop traceable measurement methods for the pre-selection of wastes prior to measurement for repository acceptance or possible free release Develop and implement free release measurement technologies 4
5 PLASTIC SCINTILLATOR SOLUTION, RADOS RTM 644 5
6 PLASTIC SCINTILLATOR SOLUTION, VF FRM-02 6
7 IGNALINA NPP FREE RELEASE MEASUREMENT FACILITY (FRMF) 7
8 PLASTIC SCINTILLATOR SOLUTION, VF FRM-02B, IGNALINA NPP (FRMF) 8
9 GAMMA SPECTROMETRIC SOLUTION, ENVINET, IGNALINA NPP (FRMF) 9
10 MetroDecom waste measurement system Progress beyond the state of the art New components: Special, new, patented shielding material in the form of modular, unified, reusable, ecological segments from concrete having low natural radionuclide content thus facilitating the easy and economical creation of large, site-optimized low-background facilities (chambers, tunnels); Integrated modular detection arrays: Stirling cycle cooled gamma spectrometric compact modules, plastic scintillators total gamma modules and neutron BF3 modules that collectively facilitate site-optimized detection solutions with high sensitivity, homogeneity scanning and transportability; Integrated collimated gamma irradiator for improved scanning of wastes with heterogeneous composition and density; Special holders that enable the use of various site-specific containers and drums; Universal transport and measurement IP1 and IP2 containers optimized for safe transport and low absorption during measurement, thus eliminating waste reloading; New, universally applicable certified calibration/testing standards and reference materials that facilitate accurate, traceable measurement. 10
11 MetroDecom waste measurement system Progress beyond the state of the art Improved features: A standardized modular, transportable, reusable, site-optimizationenabling concept High throughput (up to 5 t/hr, 10 m3/hr) Individual detection arrays, high sensitivity and wide detection range Adaptation for segregation or free-release measurement purposes Adjustable measurement geometry (optimization for low- and highdensity materials) Comprehensive homogeneity scanning Flow through, without movable doors configuration (high throughput, safety, affordability) Radon daughters background and internal contamination reduction 11
12 METRORWM FRMF EXPERIMENTAL FACILITY - COMPLETED 12
13 METRORWM FRMF EXPERIMENTAL FACILITY - CONSTRUCTION 13
14 METRORWM FRMF EXPERIMENTAL FACILITY - CONSTRUCTION DETAILS 14
15 METRORWM AND METRODECOM SPECIAL BRICKS (OLD AND NEW TYPE) 15
16 METRORWM FRMF FOUR IDM-1 HPGE DETECTOR ASSEMBLY 16
17 METRODECOM HPGE DETECTOR IDM-200V 17
18 METRORWM EXPERIMENTAL FACILITY - INTERNAL DOSE RATE, VALIDATED BY PTB 18
19 METRORWM EXPERIMENTAL FACILITY OUT / IN SPECTRA COMPARISON 19
20 METRORWM EXPERIMENTAL FACILITY BACKGROUND COMPARISON 20
21 METRODECOM MEASUREMENT SYSTEM CONCEPT (INDUSTRIAL FACILITY) spectrometric without lead modular transportable flow through without doors adjustable detectors radon free IP1/2 containers 21
22 METRODECOM MEASUREMENT SYSTEM CONCEPT (INDUSTRIAL FACILITY) 22
23 METRODECOM MEASUREMENT SYSTEM CONCEPT (JRC ISPRA FACILITY) 23
24 METRODECOM MEASUREMENT SYSTEM DESIGN (SPECIAL BRICKS SHIELDING ) 24
25 METRODECOM DESIGN WITH METRODECOM CONTAINER AND 200L DRUM 25
26 METRODECOM DESIGN WITH JRC ISPRA CONTAINER AND 200L DRUM 26
27 METRODECOM DESIGN WITH TWO METRODECOM CONTAINERS (1M 3 TOTAL) 27
28 METRODECOM DESIGN, INTERNAL STRUCTURE 28
29 METRODECOM DESIGN, DETECTION ARRAY (4xHPGE, 4xPLASTIC, 3xNEUTRON) 29
30 METRODECOM WASTE MEASUREMENT SYSTEM CONSTRUCTION, TREBIC (ENVINET ) 30
31 METRODECOM WASTE MEASUREMENT SYSTEM MODEL 31
32 METRODECOM WASTE MEASUREMENT SYSTEM, JRC ISPRA (ISF BUILDING) 32
33 IP-1 METRODECOM CONTAINER 100x120x60CM (~0,5 M3) 33
34 IP-2 METRODECOM CONTAINER 100x120x60CM (~0,5 M3) 34
35 JRC ISPRA CONTAINER AND 200L DRUM HOLDERS 35
36 Scanning irradiation module design 36
37 MC optimization of shielding tunnel Goal: Optimization of shielding tunnel and detectors configuration chamber floor thickness thickness of shielding below conveyor belt thickness of shielding wall length of shielding wall shape of shielding wall Visualizations of the Monte Carlo model. 37
38 MC optimization of segregation detector array Total detection efficiency calculation for different configurations of plastic scintillators for given segregation system tunnel dimensions 4, 8, 12 detectors 3 widths of the detectors 6 different measured materials (steel, wood,...) Examples of different modelled detectors configurations 38
39 MC optimization of scanning irradiation module Optimize of shielding and collimator for given source-to-detector geometry of the scanning facility SELECTED open position MC model of the final design of the source shielding and a collimator. closed position Detector is in the upper part (blue), collimator and shielding in the lower part. Scanned material is in the middle (yellow). Colours: red steel blue lead green air cyan source yellowcontainer 39
40 MC validation of HPGe IDM-200V detector model Development of MC model and validation by comparison using 3 pcs of the detector Relative difference between measured (3 pcs of detector) and simulated detection efficiencies. 40
41 How to ensure benefits for stakeholders and end users? What MetroDecom WP2, WP3 outcomes offer: Improvement of capacity, accuracy, reliability and mobility of the measurement with positive economic impact Opportunities: To launch a new generation of radioactive waste monitors with special shielding in the market To take advantage of FRMF prototype and MetroDecom outcomes for establishment of training and workshop centre for EU waste management stakeholders in JRC Ispra, Italy 41
42 The guaranty of the correctness of the clearance process is important for all stakeholders and end users in the utilisation of radionuclides and nuclear energy.
43 EMRP JRP ENV54 MetroDecom ENV54 objectives and corresponding working packages cover radioactive waste metrology at all stages of the post-operational cycle, from the characterization of solid wastes, to pre-selection, free release, and monitoring within the waste repository. WP No Work Package Name Active JRP-Participants (WP leader in bold) WP1 WP2 WP3 Characterisation of materials present on decommissioning sites Measurement facility for waste segregation Implementation of free release measurement facility on decommissioning site NPL, CEA, CMI, ENEA, IFIN-HH, PTB, SCK-CEN, STUK NUVIA ENVINET, CMI, JRC, PTB, REG(NUVIA ENVINET) CMI, ENEA, NUVIA ENVINET, IFIN-HH, JRC, NPL, REG(NUVIA ENVINET) WP4 Radioactive waste repositories monitoring NPL, ANDRA, EDF, ENEA, LNE, MIKES WP5 Development of reference materials and standard sources PTB, CMI, ENEA, IFIN-HH, JRC, NPL WP6 Creating Impact ENEA, All WP7 JRP management and Coordination CMI, All 43
44 EMRP JRP ENV54 MetroDecom JRP Title and JRP-Coordinator contact details JRP Number JRP Short Name Full JRP Title Coordinating Organisation JRP-Coordinator ENV54 MetroDecom Metrology for decommissioning nuclear facilities Cesky Metrologicky Institut Brno Jiri Suran Address Czech Metrology Institute Inspectorate for Ionizing Radiation, Radiova 1, Prague 10, Czech Republic Phone: Key Dates Start date End date Duration JRP months REG(ENVINET) months 44
45 EMRP JRP ENV54 MetroDecom Financial resources Total eligible costs ( ) EURAMET contribution ( ) Unfunded JRP-Partner contribution (months) Integral REG contribution (months) , ,50 28,0 30,0 45
46 Radionuclide vectors & scaling factors Radionuclide vector general term, univocal definition is missing usually averaged percentage ratio of activity of radionuclides determined by analysis of waste streams samples (sometimes weighted by clearance levels and normalized) Radionuclide vectors calculated without casual correlation analysis (among radionuclides) are not representative if composition of wastes is not stable often used incorrectly for counting rate/activity conversion (non spectrometric devices) during free release measurement Scaling factor ratio between gamma emiting key radionuclides and casually related radionuclides defined by ISO standard 21238:2007 based on correlation between fissile radionuclides and activation radionuclides spectrometric measurement is necessary (activity of key radionuclides determination) IAEA Nuclear Energy Series MW-T-1.18 Determination and Use of Scaling Factors for Waste Characterization in NPPs Scaling factors spectrometric measurement 46
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