containment filtered venting system
TRANSCRIPT
Georgi Ignatov – WorleyParsons Nuclear ServicesBeatriz Liebana – Iberdrola Generacion NuclearBulatom 07-June-2018
Containment Filtered Venting System
Successful Implementation
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Containment Filtered Venting System
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▪ What is Containment Filtered Venting System
▪ Purpose: safely depressurize the plant containment in case of severe accident and preserve its integrity by venting the excess of mass and energy
▪ Function: filter the vented flow from radioactive aerosol compounds
▪ Regulatory requirement introduced in Spain as lesson learned from Fukushima incident analysis
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CNC Containment Filtered Venting System
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Cofrentes NPP (CNC)
Type of Reactor Boiling water reactor: BWR/6
Supplier General Electric
Fuel Enriched Uranium Dioxide (UO2)
Nº of fuel elements
624
Thermal Power 3,237 MWt
Gross electrical power
1,092 MWe
Length of Cycle 24 months
Nº of Refuelings 20
Commercial Operation
March 1985
Current Operating Permit
20/03/2021 for 10y period
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CNC Containment Filtered Venting System
▪ Outdoor installed equipment of 1 demister, 3 dry aerosol filters, 2 iodine filters
▪ CFVS is installed as by-pass on existing HCVS
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Demister
# DF (guar.)
Aerosols > 2000 (MPPS)
I2 > 3000
CH3I > 300
Iodine Filters
Aerosol Filters
SS Fibre Filters
Activated Zeolite
Existing HCVS
CFVS Piping
CNC Containment Filter Venting System
▪ WorleyParsons SoW:
▪ system and equipment basic design
▪ equipment detail design
▪ equipment manufacturing, testing and supply
▪ Iberdrola SoW:
▪ piping and foundations detail design
▪ system licensing
▪ piping manufacturing and supply
▪ installation
5Demister
Aerosol Filters
Iodine Filters
Existing HCVS
CFVS Piping
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WorleyParsons Approach for Development
▪ “Install and Forget” – minimize the assembly, installation and maintenance efforts
▪ “Fully Passive” – ensure system operation without involvement of operators or utilities
▪ “To Code” – make all to correspond to pressure vessel code
▪ “Catalog Items” – use of commercially available components and materials with proven operation history
▪ “Qualify Products” – performance of efficiency and integrity tests to qualify the components covering all operational conditions
▪ “Worst Case” – consider worst operational case and apply additional safety margins
▪ “Define limits” – evaluate for all operational and structural cases
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Design of the equipment
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Design of the system
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Design Aerosol Filter Module – Concept Development
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▪ The box - regular ventilation equipment DP<1barg
▪ Heavy box – reinforced ventilation equipment to meet pressure requirements DP<10bar
▪ Filter Pressure Vessel
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Design Aerosol Filter Module
▪ HEPA filtration process using 43pc SS sinter fiber filter elements▪ Filtration grade H13, collection particles size 1-3µm about 18kg per vessel.
DFMPPS=2000▪ Filtration surface ~29m2
▪ Pressure vessel to EN 13445, FEA analyzed to EN 13445-3, Annex C, using DbA method, seismic qualification to IEEE-344
▪ Fully welded, made out of 1.4401 with 40y lifespan under ambient conditions filled with 90%N2
▪ Design parameters:▪ DP 6.7bara
▪ DT 166°C / -17.5°degC▪ D Flow 15kg/s (5 kg/s per vessel)
▪ Operating▪ Various
▪ Weight 1190kg▪ DxH – 2117x1020mm▪ Footprint ~1.4m2
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Design Aerosol Filter Module
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Visually exaggerated Visually exaggerated
Visually exaggerated
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Design Iodine Filter Module
▪ Chemisorption of iodine compounds over the silver zeolite ceramic matrix▪ DFI2=3000 and DFCH3I>300▪ Pressure vessel to EN 13445, FEA analyzed to EN 13445-3, Annex C, using DbA
method, seismic qualification to IEEE-344 ▪ Shell flange to EN 1591-1(EN 13445-3, Annex G)▪ Fully welded vessel made out of 1.4401 with 40y lifespan under ambient
conditions filled with 90%N2
▪ Design parameters:▪ DP 6.7 bar▪ DT166°C / -17.5°C▪ D Flow 15kg/s (7.5 kg/s per vessel)
▪ Operating▪ Various
▪ Weight 3490kg (filled)▪ DxH – 1706x4300mm▪ Footprint <2.5m2
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Design Iodine Filter Module
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Design Demister Module
▪ Moisture and droplet separator via two stage vertical separator▪ Pressure vessel to EN 13445, FEA analyzed to EN 13445-3, Annex C, using Db
A method, seismic qualification to IEEE-344 ▪ Fully welded vessel made out of 1.4401 with 40y lifespan under ambient
conditions filled with 90%N2▪ Design parameters:
▪ DP 6.7bara▪ DT166degC / -17.5degC▪ D Flow 15kg/s (7.5 kg/s per vessel)
▪ Operating▪ Various
▪ Weight 1630kg▪ DxH – 2500x1800▪ Foot print <2.5m2
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Design Demister Module
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Manufacturing
▪ All equipment manufactured and tested to EN 13445
▪ Manufacturing period including materials and components procurement < 6 months
▪ Notified body TUV Nord
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Installation
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Link to video
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Our Solution result in cost effective, designed for easy and fast installation, maintenance free and licensable
Maintenance free Cost effective Easy & fast to install
40% below the
established market price
Small, simple design of the modules, no need for additional civil works
Minimum impact on operation, maintenance and inspection work, no
equipment testing required
Licensable
Meets regulatory requirements
WorleyParsons Approach for Containment Filtered Venting
DISCLAIMER
This presentation has been prepared by a representative of WorleyParsons.
The presentation contains the professional and personal opinions of the presenter, which are given in good faith. As such, opinions presented herein may not always necessarily reflect the position of WorleyParsons as a whole, its officers or executive.
Any forward-looking statements included in this presentation will involve subjective judgment and analysis and are subject to uncertainties, risks and contingencies—many of which are outside the control of, and may be unknown to, WorleyParsons.
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