Processing System Upgrade at the Farley Nuclear Plant #20328 - PowerPoint PPT Presentation

AVANTech I N C O R P O R A T E D AVANTech's Liquid RadWaste (LRW) Processing System Upgrade at the Farley Nuclear Plant – #20328 WM2020 Conference, March 8 - 12, Phoenix, AZ AVANTech: Mark Ping , Larry Beets, James Braun www.avantechinc.com

Previous System ◼ Standard Media Based Demineralizer System ◼ Up-front Granular Activated Carbon (GAC) ◼ Standard Ion Exchange Resin ◼ Specialty Media (optional) ◼ Chemical Injection (optional) ◼ Minimal Shielding ◼ Manually Operated (no automation) ◼ No integrated waste handling (manual sluice to waste container) 2

New System - Key Technologies ◼ Oxidation: Ozone ◼ Suspended Solids Removal: Ultra-Filtration (UF) ◼ Dissolved Solids Removal: Reverse Osmosis (RO) - Double Pass ◼ Ion Exchange: Selective Medias ◼ RO Reject Disposition: Dried to Solids ◼ Solids Drying Technology: Paddle Dryer 3

AVANTech UF Installations 4

AVANTech RO Installations 5

Simplified Process Flow Diagram Reject TUF™ Membranes Recycle Carbon WPS™ PASS 1 Filter Ozone Rough Destruct Waste Ozone Ion Exchange Holdup 50 Generator Tanks CF TUF™ Recirc Tank Carbon Bed TUF™ SKID Solids RWRO™ Pass 1 Reject Recycle WPS™ PASS 2 Ion Selective RWRO™ Exchange SKID Solid 15 Concentrate Sludge CF Tank Tank Pass 1 Permeate RWRO™ Pass 2 Liquid Radwaste System (LRS) Plant Patented RWRO™ Process Discharge Tank 6

General Layout 7

Why Ozonation? ◼ Destroy organics in LRW water ◼ Minimizes RO cleanings ◼ Most powerful oxidizer permitted ◼ No chemical handling ◼ No residue chemicals to treat/dispose ◼ Short half life – excess decays quickly ◼ Used as cleaning agent for Tubular Ultra-Filtration (TUF™) 8

Ozone System 9

Why Ultra-Filtration? ◼ Removes essentially all solids/colloids ◼ Removes essentially all oils/greases ◼ Ultimate protection of RO ◼ Cross-flow minimizes fouling ◼ Easily cleaned with ozone ◼ Minimizes waste volume 10

TUF™ Advantages ◼ Continuous cross-flow cleaning of membrane surfaces ◼ Higher overall flux ◼ Protection for the RO ◼ Ozone cleaning ◼ High surface area in a small package 11

TUF™ Module ◼ TUF™ Module Cutaway ◼ TUF™ Module Array 12

TUF™ Turbidimeter ◼ Provides “quantitative” protection for the RO ◼ 100% reproducible NTU value ◼ 0.001 NTU Sensitivity ◼ Low Maintenance Design ◼ Long-lasting LED Light Sources ◼ Advanced System Diagnostics 13

TUF™ System 14

Why Two-Pass (Double-Pass) RO? ◼ Reduces Ion Exchange polishing media consumption ◼ 1 st Pass acts as a roughing RO ◼ Allows 2 nd Pass to act as a polishing RO ◼ Ability to adjust pH without fouling if necessary ◼ Minimize reject volume for treatment ◼ Maximize quality of effluent 15

RadWaste Reverse Osmosis (RWRO™) ◼ Two-Pass RWRO™ ◼ Two-Pass RWRO™ Pressure Vessels 16

Waste Processing System (WPS™) ◼ Provides ion exchange polishing for RWRO™ ◼ Destroys residual ozone prior to RWRO™ ◼ Utilizes selective media to polish ◼ Easy processing logic changes or vessel isolation ◼ Loading/sluicing simplified and effective 17

WPS™ Modular Ion Exchange System 18

WPS™ (cont’d) ◼ WPS™ Meters & Sample Sink ◼ WPS™ PVs Rear View 19

Reject Treatment ◼ Paddle Dryer: ◼ Paddle Dryer with High Integrity Container (HIC) ✓ Deals with all types of waste ✓ Provides smallest radwaste volume ✓ More capital intensive ✓ Automatic/unattended operation ✓ Deposits waste in easy-to-handle waste containers 20

Solids Handling System (SHS) 21

Paddle Dryer ◼ Paddle Dryer without Insulation ◼ Paddle Dryer Top Section 22

Paddle Dryer - Waste Processing Various video captures of the drying process (looking inside the dryer) 23

Heat Transfer System (HTS) 24

Chilled Water System 25

Inline Analytical Instrumentation ◼ Multiple conductivity probes ◼ Multiple pH probes ◼ Turbidity for fine particulate monitoring ◼ ORP (Oxidation Reduction Potential) probes to support ozone system control 26

Process Automation ◼ Completely automated operation ◼ Local Touch Screen ✓ Full Local and Remote HMI Control ✓ Auto sequential startup/shutdown ✓ Balance system operation ✓ Unattended operation possible ◼ Process optimization built-in ◼ Complete safeguards with shutdowns ◼ Data logging for historical trending ◼ Report generation ◼ Management overview of system from computer 27

Example of the HMI Screens 28

History & Reporting Functions ◼ Capable of trending performance data ◼ Allows optimization of equipment ◼ Contributes to management overview reports ◼ Helps with maintenance planning 29

Millicuries per Million Gallons Released 151.03 160 145.05 140 111.4 120 105.42 100 90.48 85.66 80 2019 60 was a Plant Performance 40 26.54 Record 20 6.92 0 2012 2013 2014 2015 2016 2017 2018 2019 30

CONCLUSION ◼ Effluent Water Quality ✓ Processed over 4,731,765 L (1,250,000 gallons) since startup. ✓ All effluent < MDA ( less than Minimum Detectable Activity ) - a plant record. ◼ Waste Generation ✓ Only ~1.42 m³ (~50 ft³) of spent media has been transferred to the waste container. ✓ It is expected that the waste container will NOT require replacement until 2021. ◼ Operation ✓ Farley’s decision to add the full-time dedicated AVANTech Technician has ensured the successful performance of the LRS will continue with minimal interruptions, minimal waste generation, while producing <MDA effluent water. 31