DISMANTLING OF BRENNILIS NPP – FRANCE specific EQUIPMENT

PARTNERS MAINT COMPANY LTD

International Nuclear Forum "BULGARIAN NUCLEAR ENERGY - NATIONAL, REGIONAL AND WORLD ENERGY SAFETY “, Varna, 2-4 June 2011



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Brennilis reactor is an experimental reactor moderated with heavy water and cooled with carbon dioxide (HWGCR). The reactor was to have a power of 70 MW.

The startup occurred in 1967.

In 1985 the reactor was decommissioned.



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Brennilis marks the first dismantling of a complete nuclear power station in France. EDF and CEA announced intention to make a transparent process so that it can be used as a model for dismantling of other plants later.

The process is divided into 3 phases:Phase 1

This phase was launched in 1985, similar to a refueling outage the fuel is moved to the spent fuel pool, but new fuel is not loaded, and the fuel on site is evacuated.

Phase 2Phase 2 started in 1997, consisting of:

• decontamination and disassembling of the buildings except for the reactor itself.

• evacuation of the nuclear waste. In 2005 phase 2 officially finished.

Phase 3Phase 3 which is currently underway, consist of:

• dismantling of the heat exchangers.• dismantling of the Reactor pressure vessel (RPV) – ONET

TECHNOLOGIES leader of consortium ONET TECHNOLOGIES/NUKEM TECHNOLOGIES.

• demolition of the containment (Reactor building).



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The equipment is designed for operation in a chamber for treatment of radioactive waste (CDI) and will be installed in place in the Brennilis nuclear power plant in France. The equipment will perform specific operations and is designed to comply with the requirements of individual technical specifications prepared by consortium GМЕ (ONET TECHNOLOGIES/NUKEM TECHNOLOGIES).



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The scope of work assigned to PMC by ONET TECHNOLOGIES is the executive studies, manufacturing, factory acceptance tests and delivery on site for following equipment:

• Elevator;• “Renard” trolley;• 5m3 trolley;• Characterization trolley;• Hoisting devices and rack;• Sorting table.



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The main designing requirements are the following:• Several types of packages (weight and

dimensions);• Interface with civil construction;• Low speed for all movements;• Operations in remote control;• Maintenance of equipment;• Life time of equipments;• Operation in radioactive environment;• High accuracy of positioning;• Equipment to be designed in accordance with

Machinery directive 2006/42 and FEM.1.001.



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• Lack of sufficient input data for the civil construction – considering the specific conditions due to the place of operation and considering the specific technological processes due to the functions of the whole system for treatment of radioactive waste it is necessary to modify and change the use of some areas of the reactor building.

• Difficulties with limited space – the tight equipment overall dimensions are predetermined by the limited space assumed for operation execution and incorporation of the systems in the design.



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• High dose rate – operation in environment with high ionizing radiation, protection of the equipment, endurance to frequent decontamination treatment, structure designed form units which are convenient for

maintenance.



DESIGN SOLUTIONSDEVELOPMENT OF THE DESIGN CONCEPTS IN

COMPARISON TO THE ONET TECHNOLOGIES TECHNICAL SPECIFICATIONS



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ONET TECHNOLOGIES DESIGN PMC DESIGN IN COLLABORATION WITH ONET TECHNOLOGIES



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PMC DESIGN IN COLLABORATION WITH ONET TECHNOLOGIES

Main technical characteristicsLoad carrying capacity 10 tSpeed of movement 2 m/min Overall dimensions 2190 x 1600 x 16450 mmPlatform dimensions 1450 x 1450 mmPlatform height from the floor 860 mm

Elevator is designed to carry three types of containers between four levels in the rector building.



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ONET TECHNOLOGIES DESIGN




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“Renard” trolley performs transportation of three types of containers. The loading/unloading operations are performed by the trolley itself and are controlled from control room.

Basic trolley “Renard”

Load carrying capacity 10 tNominal lifting capacity 5,5 tLifting height 2250 mmLifting speed 1 m/min Maximum traveling speed 4,47 m/minRail span 1,2 m Trolley traveling distance 28,7 mOverall dimensions 3091 х 1430 х 2188 mm

Small trolley “Renard”

Load carrying capacity 10 tLifting height 150 mmLifting speed 0,13 m/min Traveling speed 3,76 m/minTrolley traveling distance 8 mOverall dimensions 1300 х 1340 х 365,5 mm

Main technical characteristics



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Main technical characteristicsLoad carrying capacity 23 tLifting height 103 mmLifting speed 0,12 m/min Traveling speed 5 m/minRail span 1,4 m Trolley traveling distance 22 mOverall dimensions 2555 x 1800 x 1291 mm

The 5m3 trolley is designed for operation with two types of containers: container 5m3 and container R73.



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The Characterization trolley is designed for operation with seven types of containers.

Main technical characteristicsLoad carrying capacity 3 tPlatform rotation speed 5 rpm Traveling speed 5 m/minRail span 1,5 m Trolley traveling distance 4,7 mOverall dimensions 2151 x 1694 x 1524,5 mm



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Five hoisting devices are designed. Each hoisting device is designed for operation with a specific type of basket. The weight of the heaviest basket is 3 t.



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PMC DESIGN IN COLLABORATION WITH ONET

TECHNOLOGIES

The rack is designed for storage of these 5 hoisting devices and protection lid for auxiliary coupling mechanism intended for their attaching to the crane.




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Main technical characteristicsLoad carrying capacity 1,6 tDynamic loading of the grid 1 tOverall dimensions 1200 x 2270 x 600 mm

The Sorting table is designed for containing the waste unloaded from the baskets OT and NUKEM.



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The main control mode of the whole equipment during the process of nuclear reactor dismantling is intended to be from control room via Ethernet communication.

The reliable and synchronized operation of the devices is realized by utilization of contemporary technologies and concepts.

The equipment is also able to operate in maintenance mode and emergency mode during which the control is accomplished by local control panels.



THANK YOU FOR YOUR ATTENTION !

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DISMANTLING OF BRENNILIS NPP – FRANCE specific EQUIPMENT