Sodium/Silica. Sodium and Silica Measurements Reduce Corrosion and Deposition. Introduction. Sodium Analyzers. 2300Na Sodium Analyzer

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1 Introduction Trace Contamination Measurement Sodium/Silica Sodium and Silica Measurements Reduce Corrosion and Deposition Long-term efficient power generation requires careful surveillance to guard against corrosive and depositing conditions and to assure conformance with EPRI, VGB or other guidelines. Our sodium and silica analyzers provide highly sensitive monitoring of steam quality to prevent corrosion and deposition on turbines. These analyzers are also excellent for detecting condenser leaks and condensate polisher breakthroughs. s The Thornton 2300Na and 2301Na s offer a new design for a traditional measurement for pure water treatment and power cycle chemistry monitoring, providing assurance of water purity to minimize corrosion. Early detection of trace contamination is enabled with minimal operator supervision. The sample passes through an overflow assembly that assures precise pressure and flow regulation. The flowrate is set by a needle valve and rotameter at only 40 ml/min, saving pure water and reagent. DIPA vapor diffuses into the sample without contamination through gas-permeable tubing. The reagent raises the ph of the sample to approximately 11 ph to enable the ion-selective electrode to respond only to sodium ion concentration. The 2301Na Analyzer enables use of either DIPA or Ammonium hydroxide for this purpose. The sample passes through the sodium sensor flow tube and into the larger flow chamber containing a combination probe including the reference electrode, a ph electrode and temperature compensator. The ph measurement is always displayed, providing in-process confirmation that the correct amount of reagent has been added to the sample. The reference and temperature compensator are shared with the sodium measurement. The sample then passes to drain. Electrodes incorporate Intelligent Sensor Management capability which stores all identification, calibration, and real-time predictive maintenance data within the sensor. 2300Na 2301Na Measurement Range ,000 ppb ,000 ppb Grab Sample Yes Add-on Option Calibration Unattended, Automatic Manual Automatic Na Sensor Conditioning Yes No ph Check* Yes Yes Low Electrode Etching Frequency Yes Yes Low Reagent Consumption Yes Yes Reagent Used DIPA DIPA or NH4OH Accuracy Enclosure ±10% of reading; ±0.05ppb DIPA Fully enclosed, Full or Half Door models *ph Check assures reagent addition is taking place for interference- free measurement ±10% of reading; ±0.1ppb DIPA ±10% of reading; ±0.1ppb NH4OH Full enclosure or Panel assembly models 2300Na The 2300Na provides automatic, walkaway calibration with automatic sensor conditioning which saves time and assures reliable operation. A choice of enclosures are available to keep controls protected in dirty environments or conveniently accessible in clean areas. 2301Na The 2301Na offers a panel-mounted design with available feature options such as grab sample, filtration, and analyzer enclosure allowing the user to select those that best fit their need. The 2301Na also allows for either DIPA or ammonium hydroxide to be used as a reagent to comply with your plant operations and safety needs. 64 METTLER TOLEDO US and Canada

2 2800Si Silica Analyzer The Thornton 2800Si Silica Anaylzer is a reliable on-line instrument designed specifically for pure water treatment and power cycle chemistry monitoring. This Analyzer provides assurance of water purity to optimize ion exchange production of pure water and to minimize silica deposition in turbines. Early detection of trace contamination is enabled with minimal operator supervision. The analyzer allows sample to pass through an overflow assembly ensuring that a fresh sample is available to start each measurement cycle. A rinse period purges the previous sample from the reaction/ measurement chamber and fills it with the fresh sample. The measurement is zeroed. Then, reagents are metered in and reaction time allowed to produce a color change proportional to silica concentration. Where phosphates are present, an additional reagent is included to minimize interference. The measurement is made, the display and outputs are updated and the cycle repeats. The operator can configure the measurement interval to optimize the tradeoff of response time vs. reagent consumption. The 2800Si conforms to ASTM Test Method D Na 2301Na 2800Si Silica Analyzer METTLER TOLEDO US and Canada 65

3 Trace Contamination Measurement Sodium 2300Na Trace Sodium Sensitivity, Low Maintenance, Fully Automated The METTLER TOLEDO Thornton 2300Na offers a new approach for a traditional measurement in pure water treatment and power cycle chemistry monitoring. This Analyzer provides assurance of water purity to minimize corrosion and maximize water production. Early detection of trace contamination is enabled with minimal operator supervision. Features/Benefits Fully automatic, unattended calibration assures reliable operation while saving technician time Reagent addition confirmation by ph assures consistent measurement results Convenient grab sample measurement for additional samples and QC checks for other areas of the plant Slow and complete reagent consumption saves reagent costs and eliminates waste disposal issues Simultaneous display of sodium, adjusted ph, temperature and calibration progress provides convenient analyzer and sample status at a glance, saving operator time Automated electrode conditioning with each calibration minimizes the need for electrode etching Choice of two enclosures: full locking door for dirty plant environments or with controls conveniently accessible for clean sample rooms Four analog outputs for sodium, ph and temperature with choice of scaling enables full integration into data acquisition or control systems / Thornton Specifications Measurements Range, sodium ,000 ppb or equivalent ppm, auto ranging Resolution, sodium 4 digits with decimal, autoranging; ppb in lowest range Accuracy, sodium 0 % of reading ± 0.05 ppb Response time (90 %) 5 min Update rate once per second Reagent consumption diisopropylamine, DIPA, approximately 1 L per 3 months; more at higher temperatures and for cation exchange samples Sample ph Sample flowrate > 40 ml / min (> 20 ml / min for cation exchange samples) excess to drain Sample temperature 10 to 45 C ( F) Sample pressure bar(g) (5 100 psig) Calibration Automatic, unattended 3 point known addition; manual 1 or 2 point Electrode conditioning Part of auto cal sequence Grab sample measurement Included Range, ph ph, reagent conditioned sample Range, temperature (Ambient) C ( F) 66 METTLER TOLEDO US and Canada

4 Microelectr. Outputs Analog outputs For sodium, conditioned ph, temperature; four powered 0/4 20 ma, 22 ma alarm, 500 ohm max load, not for use with externally powered circuits Analog output scaling Linear, bi linear, logarithmic (1,2,3 or 4 decades) or auto ranging Analog output accuracy ± 0.05 ma Relay contacts two unpowered, SPDT, 250 VAC/30VDC, 3 A resistive freely assignable to setpoints for sodium, ph, temperature or calibration indication for sample sequencer; other relays used for auto cal Installation//Enclosure Operator interface 4 line backlit LCD, 5 tactile keys; simultaneous display of sodium, conditioned ph, auto cal status (temperature optional) Connections Sample inlet: 1 / 4" or 6 mm OD tube SS compression fitting Drain hose: mm (¾ 1"), 2 m (6 ft) length included VAC, Hz, 25 W; on power loss all settings are retained Dimensions HWD Enclosures: mm ( ") Weight 27 kg (60 lbs) Ambient operating temperature 5 50 C ( F) Humidity % non condensing Ratings/approvals CE, culus pending Ordering Information Description Order No. 2300Na, with partial door for clean sample room Na, with full dust & water resistant enclosure Required Startup Kit for 2300Na Includes 1 L of 100 ppm sodium calibration standard solution, 250 ml of 7 and 10 ph buffer solutions and etch solutions, for 6 months of operation. (Diisopropylamine {DIPA} reagent must be sold separately) Diisopropylamine (DIPA) reagent, 2L ** (for 6 months normal operation; less time at elevated temperature or for cation exchange application) Service, Startup* Service, Spare Parts and Accessories Consumables kit 1 year - Includes sodium and ph/reference electrode, air filters, sample filter, diffusion tubing, 4L of 100 ppm calibration standard, etch solution, 250 ml of 7 and 10 ph buffer solution Replacement sodium electrode Replacement ph/reference electrode Solution, 1L of 100 ppm calibration standard Solution, 4L of 100 ppm calibration standard Standard solution are 100 ppm as sodium, using sodium chloride * METTLER TOLEDO strongly recommends that all sodium analyzer quotes include startup service ** Part number available only in the USA. In other countries consult your local METTLER TOLEDO pure water analytics representative for local sourcing Typical Applications Ultrapure water monitoring at sub-ppb sodium levels Pure water treatment cation exchange monitoring detects the first break through of sodium steam quality monitoring protects turbines from sodium attack condensate monitoring detects small leaks early to allow time to plan corrective action Bottom Dimensions 38.1 mm ( 1.50") 69.8 mm (2.75") 50.8 mm (2.00") 63.1 mm (2.48") mm (6.65") 17.8 mm ( 0.7") 20.5 mm ( 0.81") 20.5 mm ( 0.81") 39.9 mm ( 1.57") 184 mm (7.25") 79 mm (3.11") 49 mm (1.93") 17 mm (0.67") 19 mm (0.75") * 190 [7.50"] for , as shown dotted METTLER TOLEDO US and Canada 67

5 Trace Contamination Measurement Sodium NEW! 2301Na Trace Sodium Sensitivity, Reliable Measurement, Solid Value The METTLER TOLEDO Thornton 2301Na offers a panel-mounted design for sodium measurement in pure water treatment and power cycle chemistry monitoring. With key technological advances, this analyzer ensures reliable measurement of water purity to minimize corrosion. The 2301Na Analyzer offers solid value and add-on features to enhance capabilities according to your needs. Features/Benefits Wide measurement range: 0.07ppb-100,000ppb assures early detection of trace contamination Choice of reagent, DIPA or Ammonium Hydroxide to better comply with plant safety requirements ph check verifies reagent delivery assuring reliability of measurement Two models available, a panel-mounted assembly or lockable full-door enclosure Controlled, efficient reagent consumption eliminates waste disposal issues Low maintenance ensures low cost of ownership Grab Sample capability is available as an add-on option for testing samples in other areas fo the plant Specifications Measurements Range, sodium ,000 ppb or equivalent ppm, auto ranging Resolution, sodium 4 digits with decimal, autoranging; ppb in lowest range Accuracy, sodium ± 10% of reading ± 0.1 ppb, typical; using DIPA as reagent ± 10% of reading ± 1 ppb, typical; using ammonium hydroxide as reagent Response time (90 %) 5 min Update rate once per second Reagent consumption diisopropylamine (DIPA), or ammonium hydroxide, approximately 0.7 L fillings per 2 months; more at higher temperatures and for cation exchange samples Sample ph Sample flowrate > 40 ml / min (> 20 ml / min for cation exchange samples) excess to drain Sample temperature 5-50 C ( F) Sample pressure bar(g) (5 100 psig) Calibration Manual 3 point known addition; manual 1 or 2 point Grab sample measurement Available option Range, ph 0 14 ph, reagent conditioned sample Range, temperature C ( F) / Thornton 68 METTLER TOLEDO US and Canada

6 Microelectr. Outputs Analog outputs For sodium, conditioned ph, temperature; four powered 0/4 20 ma, 22 ma alarm, 500 ohm max load, not for use with externally powered circuits Analog output scaling Linear, bi linear, logarithmic (1,2,3 or 4 decades) or auto ranging Analog output accuracy ± 0.05 ma Relay contacts two unpowered, SPDT, 250 VAC/30VDC, 3 A resistive freely assignable to setpoints for sodium, ph, temperature Range, temperature C ( F) Resolution, temperature Adjustable 0.01 to 1 C/ F Installation//Enclosure Operator interface 4 line backlit LCD, 5 tactile keys; simultaneous display of sodium, conditioned ph, cal status (temperature optional) Connections Sample inlet: 1 / 4" or 6 mm OD tube PP compression fitting Drain hose: 19 x 25.4 mm (¾ x1"), 2 m (6 ft) length included VAC, Hz, 25 W; on power loss all settings are retained without batteries Dimensions HWD 851 x 450 x165 mm (33.5 x x 6.5") Weight 4.5 kg (10 lbs) Ambient operating temperature 5 50 C ( F) Humidity % non condensing Ratings/approvals CE, UL, IP65 Ordering Information Description Order No. 2301Na panel assembly Na with full door enclosure Accessories and Consumables Consumables kit 1 year - Includes sodium and ph electrodes, air filters, sample filter, diffusion tubing, calibration kit, 7 and 10 ph buffer solutions Calibration kit 1 year - Includes 120mL of 100ppm calibration standard, 60 ml of conditioning solution, etch kit Diisopropylamine (DIPA) Ammonium Hydroxide 30% Key Applications Make Up Water: Detects cation breakthroughs of sodium ions signaling exhaustion of cation resin. Condenser and Polisher: Warns of cation breakthrough and condenser leakage. Economizer: Detects sodium carryover into inlet water before it enters the boiler. Superheater: Detects sodium carryover into steam to protect turbines.? Did You Know The 2300 Sodium Analyzer provides walk-away calibration and automatic sensor calibration METTLER TOLEDO US and Canada 69