Spent Fuel Pool Level Instrumentation EA-12-0051 /...
Transcript of Spent Fuel Pool Level Instrumentation EA-12-0051 /...
Spent Fuel Pool Level Instrumentation EA-12-0051 / Rec. 7.1 Your Contact: Heiner Dornburg, Product Manager AREVA, Inc. 7207 IBM Drive - Charlotte, NC 28262 Cell: (704) 390-5831 E-Mail: [email protected]
SFP Level Instrumentation SFP Order Milestones
5/31/2012 – NRC issues draft ISG 6/29/2012 – Industry comments on draft ISG 8/31/2012 – NRC issues ISG 2/28/2013 – Plants submit plans to NRC – ask for relief, if needed Response to RAIs, may get plant specific orders 12/31/2016 – (or 2 refueling cycles after ISG issued, whichever is first) – full implementation
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3rd Post Fukushima Expert Round Table – SFP Instrumentation – J. Scecina / H. Dornburg/ N. Wilkie - p.3
One fixed primary channel, one fixed or portable backup Even though not required, it may be prudent to employ diverse
technologies between primary and backup Diverse technologies present a stronger argument for system
survivability A portable channel might be cheaper to install but will require
procedures for when and how to deploy it • FLEX will also provide portable level instrumentation
Separation and independence between channels Missile shielding via building recesses and corners Much of the shielding will be provided by the pool structure itself How will missiles be analyzed? Will NRC expect an analysis?
SFP Level Instrumentation Requirements Discussion 1/3
SFP Level Instrumentation Post Event SFP Status Fukushima
Unit 3 Unit 4
3rd Post Fukushima Expert Round Table – SFP Instrumentation – J. Scecina / H. Dornburg/ N. Wilkie - p.4
Presentation title – Presenter/ref. - 26 April 2012 - p.5
SFP Level Instrumentation Requirements Discussion 2/3
Seismic mounting Instrument shall maintain design configuration during
maximum seismic event Seismic Cat 1 requirement conspicuously absent from order
Alternate power connection independent of plant AC and DC power distribution, i.e., portable generators or replaceable batteries Procedure and training to be provided for connecting to
alternate sources Are two independent portable generators (or generator +
battery) needed to retain channel independence?
Testing and calibration capabilities shall be provided as part of the instrument design In-situ calibration capability of fixed channel would save labor
versus remove, calibrate, replace method
3rd Post Fukushima Expert Round Table – SFP Instrumentation – J. Scecina / H. Dornburg/ N. Wilkie - p.6
SFP Level Instrumentation Requirements Discussion 3/3
Display location may be the control room, alternate shutdown panel, or other “appropriate” and accessible location Powering the system from the display location may allow the
best solution for locating the alternate power source or easiest battery replacement What constitutes an appropriate versus inappropriate location? How is accessibility determined, what is it based on?
Display either continuously or on demand Pushbutton at display for taking momentary readings after loss
of normal power can prolong battery life and makes using small batteries feasible.
Training and procedures for instrument testing, calibration and use
Instrument requirements are well defined. NRC guidance is needed for some installation related questions.
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SFP Level Instrumentation Installation Aspects
Mounting solutions Mounting of a device alongside the fuel assemblies Space near the transfer mechanism Access to pool – available trenches for conduit or pipe Are floor penetrations needed Mounting to liner
Locating the equipment Wet vs. dry measurement Protection of electronics and any organic parts
Adjacent rooms for electronics Wall penetration for waveguide
Location(s) for level indication Control room / Alternate shutdown panel / Other
Measuring range – to top of fuel elements or deeper
3rd Post Fukushima Expert Round Table – SFP Instrumentation – J. Scecina / H. Dornburg/ N. Wilkie - p.8
SFP Level Instrumentation AREVA SFP Instrumentation Solutions
AREVA can provide a wide variety of SFP Instrumentation solutions, including: Through-air radar (VEGA) Water level pressure transducer, fixed and portable (AREVA) Magnetic float + reed switches (AREVA) Guided wave radar (VEGA)
AREVA recommendations are: Primary channel, fixed:
through air radar or fixed pressure transducer Secondary channel fixed: diverse solution to channel 1 Secondary channel portable: port. pressure transducer
3rd Post Fukushima Expert Round Table – SFP Instrumentation – J. Scecina / H. Dornburg/ N. Wilkie - p.9
A strain gauge is mounted to the inside of a stainless steel housing Higher water level means more pressure on the housing, leading to elongation of the strain gauge The resulting change in electric resistance is translated into the water level information For calibration, a defined pressure is applied to the transducer in situ
Presentation title – Presenter/ref. - 26 April 2012 - p.10
SFP Level Instrumentation How It Works: Pressure Transducer
Calibration pressure tube
Tube for wiring
Fixed Installed Transducer
Temperature 250º F Humidity Saturated Steam Accident Radiation TBD Accuracy ± 0.25% F.S. Temperature Error Zero: ± 0.005% F.S/Deg. F
Span: ± 0.005% F.S/Deg. F Available Length As Required Calibration In-situ via pressure calibrator Maintenance None
Not to scale!
A simple, fully analog solution with 4…20mA standard output & display.
Mounted outside of pool.
Mounted using AREVA’s proprietary underwater adhesive bonding, NO welding, drilling or diving required.
3rd Post Fukushima Expert Round Table – SFP Instrumentation – J. Scecina / H. Dornburg/ N. Wilkie - p.11
SFP Level Instrumentation AREVA Pressure Transducer
Rugged. Simple. Designed specifically for NPP Requirements.
3rd Post Fukushima Expert Round Table – SFP Instrumentation – J. Scecina / H. Dornburg/ N. Wilkie - p.12
Portable Transducer
Temperature 250º F Humidity Saturated Steam Accident Radiation TBD Accuracy ± 0.25% F.S. Temperature Error Zero: ± 0.005% F.S/Deg. F
Span: ± 0.005% F.S/Deg. F Available Length As Required Calibration Bench calibrate via
pressure calibrator Maintenance None Deployment Unreel MI Cable and drop
transducer to defined depth, connect to comb. readout/power unit.
Simple post-event installation portable channel.
3rd Post Fukushima Expert Round Table – SFP Instrumentation – J. Scecina / H. Dornburg/ N. Wilkie - p.13
SFP Level Instrumentation Advantages of Pressure Transducer
Very simple, very few parts Fully analog, no software involved Can be used as a portable device Extremely low power consumption No electronics or organic parts in SFP room No maintenance needed (calibration only) In-situ calibration, no removal from pool No work close to pool except for turning the fixed transducer to its calibration position
3rd Post Fukushima Expert Round Table – SFP Instrumentation – J. Scecina / H. Dornburg/ N. Wilkie - p.14
A Solution developed for SFP in Nuclear Plants.
SFP Level Instrumentation How It Works: Through-Air Radar
Live demonstration of Radar and Transducer will be available starting in May at AREVA’s SFP mockup in Lynchburg, VA!
A packet of microwave pulses are transmitted by the antenna system This pulse is reflected by the water and received by the same antenna system The running time of the RADAR pulse from emission to reception is proportional to the distance to the water surface. „Distance to water surface“ is translated into the level information.
3rd Post Fukushima Expert Round Table – SFP Instrumentation – J. Scecina / H. Dornburg/ N. Wilkie - p.15
Fixed Installed Through-Air Radar
Temperature: ∼700º F (Waveguide tube/ stilling well). 160º F electronics/readout (located at end of ≤ 100’ waveguide tube outside of SFP room). Humidity: Saturated Steam Accident Radiation: N/A (only metal in SFP room) Accuracy: ± 0.39% in. Temperature Error: None Calibration: Not required, no drift With swivel flange in situ. Maintenance: None Software: SIL2 certified per IEC61508 Power consumption: Extr. Low: 0.5W. Periodic wake-up feature and on demand measurem.
≤ 100ft waveguide, 1-2”
Radiation + temp. shield
Not to scale.
Nothing in the pool. Simple. Highly accurate. No organic parts in the SFP room. Proven.
Pool
Fuel
Ele
men
t
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VEGA Through-Air Radar with Bent Waveguide
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VEGA Through-Air Radar with Bent Waveguide
Hawaii Lava Level Measurement
3rd Post Fukushima Expert Round Table – SFP Instrumentation – J. Scecina / H. Dornburg/ N. Wilkie - p.18
SFP Level Instrumentation Advantages of the VEGA Radar Solution
No parts in the pool. Liner not touched, no in-pool mounting, independent from pool water forces. IEC 61508 SIL 2 (Safety Integrity Level) Design Certification, Seismic Cat 1 No need for under water work for calibration or cleaning. No moving parts, very few parts in total (horn, pipe, electronics) very simple overall. No organic parts or electronics in the SFP room (horn and pipe are all stainless steel) Independent from room pressure changes. Very flexible mounting (floor, wall, ceiling) Bent waveguide tube is not larger than any other connection with its protection Very rugged: explosion proof, all metal housing, waveguide tube can be thick walled for missile protection. Measurement forgives pipe dents. Extremely low power consumption, can be operated using two standard 9V batteries. No calibration needed; very simple if desired (swivel flange to turn horn for calibration) Widely used, mature devices (300.000+ sold worldwide) Easy and long-term qualified service and spare parts availability. Most Reliable, 50+ Year MTBF Self Diagnosing (Smart Error Messages)
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AREVA SFP Level Measurement Solution
Transmitter and Display Model Options
Accumulator (Battery Pack)
New set of electronics for side chamber
Implementing Production in Cincinnati
Manuals available
Hazardous areas Certs
> 60 hours in continuous mode, Months or Years with Standard Intermittent Measurement Option
Accumulator Haz Location Approach
Ex ia Ex d
ia
VEGADIS 64
Specifications 4…20mA Input Loop-Powered 5-Digit, 0.7” (17.8mm) Upper Display 7 Alphanumeric Character, 0.4 (10.2mm) Lower Display Thru-Glass Button Programming Password Protection 32-Point, Square Root, or Exponential Linearization Loop or External DC-Powered Backlight Standard 3.0V Drop (6.0V with Backlight) Explosion-Proof, IP68, NEMA 4X Enclosure Flange for Wall or Pipe Mounting HART Protocol Transparent Operates from -40 to 75ºC 7-Digit Totalizer Rate in Units per Second, Minute, Hour, or Day Open Collector Pulse or Alarm Output
VEGADIS 64
Easy Wiring and Setup
The meter is factory calibrated for milliamps prior to shipment.
The calibration is certified to NIST standards.
DIS64.UDAX DIS64.UDAA
AREVA is VEGA’s Exclusive Channel for the Nuclear Power Market
Agreement in Place
Exclusive Partner: VEGA Americas, Inc. Largest installed level measurement base of any supplier
worldwide. Control Magazine's 2012 Readers' Choice Awards 1st or 2nd
place in 7 of 12 categories. Winner in Nuclear Level Measurement. Through-air radar references in Hanford Waste Treatment
Plant and at Savanna River Site. Over 60 years of experience.
SFP Level Instrumentation Strength Through Teamwork
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SFP Level Instrumentation Level Measurement Principles
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Through Air Radar and Water Level Pressure Transducer are AREVA’s Suggested Solutions. We can also deliver others.
Through-air Radar Transducer Float Guided Wave Rad. Hydrostatic Bubbler HJTC / HRTDIn/ Out of Water nothing in pool in w ater in w ater in w ater in w ater in w ater in w ater
Possible Plugging no no filter air systemsSFP Liner Protection nothing in pool glue mounting glue mounting? subm. mount subm. mount subm. mount subm. mount
Overall simplicity w aveguide pipe fully analog float, many p. guide protect. elect. + air syst. many partsMoving Parts none none float compressor
Missile Protection pipe dent forgiving small large + robust sensitive small smallAtmos. Press. Comp. Req'd no yes no yes yes
Know n Technical Issues no no no coax cable cable reliab., mainten. steam effectAffected by radiation no no no coax cable sensor sensor
Affected by Steam no no no sensor liquid column sensorIntrinsic Safety/Hydrogen yes yes yes comp., press. air
SIL/Safety Rated SIL 2*, Cat.1 seism. Cat. 1 seismic SR** IEC SIL*Easy Calibration sw ivel f lange in situ long tool remove sensor?
Seismic Withstand very good very good float assy floating guide compr., reg'ltrMTBF very good very good many parts org. cable compr., reg'ltr many parts
Best Fit Technology yes yes
AREVA Delivery Capab. - -
Key = Good *Software Integrity Level per IEC 61508= Medium or unknown ** AREVA device SR for use in Europe= Poor
Advantages and Benefits AREVA ‘User Group’ Approach
Pooling of ideas and know-how before work begins Choice of most efficient approach Regular and event-triggered meetings Source of input and feedback Faster progress Cost sharing for same or similar activities. Lower cost Future Exchange of Experience, Spares. Better operation, maintenance and long-term support.
Faster, Easier, Better, more Cost Effective. Solutions for Less Money.
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SFP Instrumentation User Group Approach 1/2
1. Preparation Phase: Requirements Analysis and Technology Demo (Lynchburg, VA) Introduction on NRC requirements and available technical solutions:
• Technical data • Demonstration of working models (LYB SFP) • Manufacturing and testing locations and QA • Delivery model and lead times • Installation and commissioning details and support • Maintenance requirements • Budgetary Price and Schedule (Pre-Study, Hardware, EPC)
Challenge questions, Q&A regarding every topic. Utility/site specific requirements (technical, schedule, approach for
implementation) SFP details (size, room and pool photos/drawings, accessibility, …) Discussion of Pre-Study: Expected deliverables
Documented summary of requirements
User Group
Contract
3rd Post Fukushima Expert Round Table – SFP Instrumentation – J. Scecina / H. Dornburg/ N. Wilkie - p.29
2. Study Phase (Plant location?) Results of SFP walk-downs (one for each plant/pool type) – plant specifics Mounting of sensors, connections and display. Implementation of the portable solution, if any. Status of Scoping Studies: presentation, discussion. Goal for the completion of the studies.
3. Mod-Package Phase (Charlotte, NC) Final Sensor and mounting solutions, detailed configuration of the systems. Details for mod-package phase. Site implementation details.
4. Implementation Phase (VEGA Technical Center) Manufacturing, FAT, QA planning On-site work approach Training
5. Completion Lessons learned exchange Transfer into support phase
SFP Instrumentation User Group Approach 2/2 User Group
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SFP Level Instrumentation Solution Strategy
Scoping Study
• Concept design, incl. mounting, cable routing, pwr. supply, display. Definition of scope of supplies. Scheduling, budgeting.
• Benefit: Maximized certainty, optimized project basis.
Mod. Package
• Plant specific detail design. Ideally provided as part of EPC contract. • Benefit: Modif. package done by AREVA supports correct input for
product manufacturing and provides a single point of accountability.
Hardware Delivery
• Choices. Proven solutions adapted to plant specific needs. • Augmented quality, fully tested. Proven properties. The right documentation. • Benefit: All requirements fulfilled. Solution without in-pool mounting,
Implemen-tation
• Training. Site installation and commissioning by AREVA DZ LLC or customer resources with AREVA field engineer.
• Benefit: Complete, seamless solution by AREVA, clear responsibilities.
Maximized Certainty and Lowest Installed Cost.
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Why AREVA? More available choices. You will get the right solution for your specific needs. The strongest team. Combined strengths of the nuclear leader and the #1 in level measurement! AREVA has all the needed engineering and the product
quality augmentation capabilities under one roof. VEGA provides unparalleled level measurement expertise.
Complete solution capability means one-stop-shopping for everything you need. We have proven our willingness and ability to support you before the sale. You can trust in us also being there after it – for quick and efficient plant life support.
We Want to Earn Your Business in SFP Level Instrumentation.
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Spent Fuel Pool Level Instrumentation EA-12-0051 / Rec. 7.1 Jim Scecina, Product Engineer Heiner Dornburg/ Product Manager N. Wilkie, Manager Special Business Charlotte, NC - April 17, 2012