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Fogging on Diesel Generator at Bugey Nuclear Power Station


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EDF
EPC contractor : Spie Nuclear

The project forms part of the periodic review of operating temperatures imposed by the following the heatwave of 2003. It aims to increase the available power of the Emergency Generating Set (GES LHG/LHH) of the BUGEY power plant, in the following scenario: Emergency Heatwave + External Voltage Failure (MDTE) in operation for 6 hours + Aggravating "Loss of a GHG".

The CP0 ENSNEA050052 ind.B hot weather reference for Bugey considers a maximum outside temperature of 44.4°C during a heatwave for a maximum duration of 6 hours.

GHG refers to the Diesel Engine (which supplies mechanical power) and Alternator (which converts the mechanical power of the diesel into electrical power). mechanical power into electrical power).

 

 

The service provided by AX System in partnership with Spie Nucléaire consists of supplying a mist cooling system to lower the temperature of the various air streams entering the plant. mist cooling system to lower the temperature of the various air streams entering the LHG/LHH Emergency in the LHG/LHH emergency power units at the BUGEY site, namely :

  • ventilation air from the diesel engine air cooler room
  • the combustion air from the diesel engines (via the ventilation air in the diesel room).

Each unit at the Bugey site has 2 GHGs (LHG for lane A and LHH for lane B). The Bugey site site therefore has 8 GHGs to be equipped with a misting system. The misting system lowers the temperature of the ventilation air in the dryer room by around 8.5°C. the temperature of the ventilation air in the air cooler room and that of the combustion air in the emergency power units.

The diesel supply includes, but is not limited to :

  • a network of pipes and valves
  • a misting “station” comprising the main hydraulic equipment (motor-driven pump unit, demineralised water filter, solenoid valves, pressure reducer, etc.) demineralised water filter, solenoid valves, pressure reducer, etc),
  • spray booms,
  • a legionella treatment system,
  • an autonomous control and command system (cabinet) to which sensors and actuators are connected.

EDF qualification required :

  • Boilermaking, pipework >; Work >; Welding >; ESP welding
  • Boilermaking, pipework >; Intervention >; Maintenance of complete support systems >; Supporting
  • Valves >; Non-return valves >; Manufacturing Group 3
  • Valves >; Pressure reducing valves >; Manufacturing Group 3
  • Valves >; Isolation valves >; Manufacturing Group 3

Quality assurance:

The service is carried out under cover of the Licensee’s Quality Assurance (Case 1 of UTO note 85/114).
This service falls within the scope of the modifications for the VD4 900 periodic review.
The material provisions valued for the misting function are important elements for safety (EIPS) in the context of the periodic review. safety (EIPS) within the meaning of the Order of 7 February 2012 laying down the general rules governing nuclear installations. These provisions are subject to :
– design and manufacture under quality assurance,
– qualification under the INB decree,
– suitability for periodic testing
– monitoring throughout the lifetime of the installation.
The misting system is classified as IPS-NC, and the case will be carried out in accordance with the EN/NF standards in force. standards.
The Machine Directive 2006/42/EC is applicable.
The requirements of the environmental decision are applicable (Decision no. 2013-DC-0360 of the French Nuclear Safety Authority (ASN) of (ASN) of 16 July 2013 relating to the control of nuisances and impact on health and the
the environment of basic nuclear installations for the storage of hazardous products).
The new equipment must not have any adverse effects on the EIPS (compliance with the earthquake event).

 

The CP0 ENSNEA050052 ind.B hot weather reference for Bugey considers a maximum outside temperature of 44.4°C during a heatwave for a maximum duration of 6 hours.

GHG refers to the Diesel Engine (which supplies mechanical power) and Alternator (which converts the mechanical power of the diesel into electrical power). mechanical power into electrical power).

 

 

The service provided by AX System in partnership with Spie Nucléaire consists of supplying a mist cooling system to lower the temperature of the various air streams entering the plant. mist cooling system to lower the temperature of the various air streams entering the LHG/LHH Emergency in the LHG/LHH emergency power units at the BUGEY site, namely :

  • ventilation air from the diesel engine air cooler room
  • the combustion air from the diesel engines (via the ventilation air in the diesel room).

Each unit at the Bugey site has 2 GHGs (LHG for lane A and LHH for lane B). The Bugey site site therefore has 8 GHGs to be equipped with a misting system. The misting system lowers the temperature of the ventilation air in the dryer room by around 8.5°C. the temperature of the ventilation air in the air cooler room and that of the combustion air in the emergency power units.

The diesel supply includes, but is not limited to :

  • a network of pipes and valves
  • a misting “station” comprising the main hydraulic equipment (motor-driven pump unit, demineralised water filter, solenoid valves, pressure reducer, etc.) demineralised water filter, solenoid valves, pressure reducer, etc),
  • spray booms,
  • a legionella treatment system,
  • an autonomous control and command system (cabinet) to which sensors and actuators are connected.

EDF qualification required :

  • Boilermaking, pipework >; Work >; Welding >; ESP welding
  • Boilermaking, pipework >; Intervention >; Maintenance of complete support systems >; Supporting
  • Valves >; Non-return valves >; Manufacturing Group 3
  • Valves >; Pressure reducing valves >; Manufacturing Group 3
  • Valves >; Isolation valves >; Manufacturing Group 3

Quality assurance:

The service is carried out under cover of the Licensee’s Quality Assurance (Case 1 of UTO note 85/114).
This service falls within the scope of the modifications for the VD4 900 periodic review.
The material provisions valued for the misting function are important elements for safety (EIPS) in the context of the periodic review. safety (EIPS) within the meaning of the Order of 7 February 2012 laying down the general rules governing nuclear installations. These provisions are subject to :
– design and manufacture under quality assurance,
– qualification under the INB decree,
– suitability for periodic testing
– monitoring throughout the lifetime of the installation.
The misting system is classified as IPS-NC, and the case will be carried out in accordance with the EN/NF standards in force. standards.
The Machine Directive 2006/42/EC is applicable.
The requirements of the environmental decision are applicable (Decision no. 2013-DC-0360 of the French Nuclear Safety Authority (ASN) of (ASN) of 16 July 2013 relating to the control of nuisances and impact on health and the
the environment of basic nuclear installations for the storage of hazardous products).
The new equipment must not have any adverse effects on the EIPS (compliance with the earthquake event).

 

Technical Specification Book (TSB) and Technical Rules Book (CRT) applicable to :

TSB – Pumping units 41.C.088 2020 ind 02
TSB – Piping 53.C.030 2020 ind 01
TSB – Pipe Support 53.C.026 2014 ind 04
TSB – Nuclear Power Plant Valves 45.C.015 2020 ind 02
TSB – Cleanliness of equipment not manufactured to RCCM requirements 91.C.108 2020 ind 02
TSB – LV Asynchronous Motors for Nuclear Power Plants 74.C.014 2016 ind 05
TSB – Wiring for nuclear power plants, general clauses 74.C.030 2015 ind 03
TSB – Earthing and bonding systems for nuclear power plants 74.C.058 2017 ind 03

CRT – Electrical Cables for Nuclear Power Plants 74.C.068 2014 ind 01
CRT – Management of electromagnetic interference (EMI) 84.C.020 2017 ind 00
CRT – Fixing of supports in Civil Engineering 91.C.075 2019 ind 03
CRT – Installation of analogue and all-or-nothing (T.O.R) sensors 82.C.012 2021 Ind 05
CRT – Welding of Qc equipment not manufactured according to RCC-M 91.C.117 2021 ind 01

Other applicable documents

Chemical specifications for products and materials usable in power plants (PMUC) – D309515012254
ind A (ind.B at the preliminary stage)
Methodology for calculating anchors in accordance with RCC-CW
RCC-E – Edition January 2012: Design and construction rules for electrical equipment in PWR PWR (Pressurised Water Reactor) nuclear islands
EN 13480: Metal industrial piping
NF C 15100: Low-voltage electrical installation (2015 version)


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