containment filtered venting system

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)


▪ 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)


▪ 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.

WorleyParsons and all associated entities and representatives make no representation or warranty as to the accuracy, reliability or completeness of information in this document and do not take responsibility for updating any information or correcting any error or omission that may become apparent after this document has been issued.

To the extent permitted by law, WorleyParsons and its officers, employees, related bodies and agents disclaim all liability—direct, indirect or consequential (and whether or not arising out of the negligence, default or lack of care of WorleyParsons and/or any of its agents)—for any loss or damage suffered by a recipient or other persons arising out of, or in connection with, any use or reliance on this presentation or information.

containment filtered venting system

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