Nuclear leaks and fires

And they say these nuclear power stations are safe!

Nuclear Installations: Accidents

Mr Weir: To ask the Secretary of State for Energy and Climate Change what (a) coolant leaks and (b) fires have been recorded at each UK nuclear installation in each of the last five years. [45017]
Charles Hendry: The Nuclear Installations Inspectorate of the Health and Safety Executive (HSE/NII) screens incident reports made by licensees to identify those which have had the potential to challenge a nuclear safety system. A search of the raw input data for such screening from January 2005 to the end of December 2010 has been undertaken for details of leaks and fires at nuclear installations.
A 'coolant leak' has been interpreted as being a loss of coolant, including clean coolant, from an item of plant into the working environment of the licensed site. Coolant itself has been interpreted as being water, carbon dioxide or hydrogen on a power station, and water elsewhere.
A 'fire' has been interpreted as being a situation where ignition of material has taken place on the licensed site or instances of smouldering where such ignition could not reasonably be ruled out given the information in the record.

Coolant leaks
Date	Installation	Incident
2005
1 January	Heysham 2	Steam leak on Turbine Generator 7
5 February	Hinkley Point B	Carbon dioxide leak from tank
19 February	Hinkley Point B	Carbon dioxide leak from tank
25 February	Torness	Carbon dioxide leak through in-service inspection penetration
15 March	Torness	Carbon dioxide leak from ring main
25 June	Dungeness A	Carbon dioxide leak from main CO2 plant
4 July	Sellafield	Damp patch discovered adjacent to B30 pond wall
25 July	Oldbury	Steam leak through thermocouple pocket of Boiler 4 on Reactor 1
4 August	Hinkley Point B	Carbon dioxide leak from vaporiser valve
30 October	Dungeness A	Carbon dioxide leak through failed isolation valve to pressure gauge
2006
30 January	Sellafield	Leak of dosed cooling water from B832 cooling tower
18 February	Sellafield	Leak of pond water through expansion joint above the stainless steel seal in B310 AGR storage pond
24 March	Hunterston B	Carbon dioxide leak in pipe trench
11 September	Hinkley point B	Carbon dioxide leak from supply pump
8 Mar 2011 : Column 975W
23 September	Hartlepool	Alternator hydrogen coolant leak
26 September	Hartlepool	Fracture of emergency cooling water main
2 October	Dungeness B	Auxiliary cooling water pipe work leak
15 October	Sizewell A	Steam leak from Turbine Alternator 1
18 November	Heysham 2	Steam leak from Reactor 7
2007
7 January	Sizewell A	Fracture of pond recirculating water system pipe work
18 January	Sellafield	Waste Vitrification Plant electrical inductor cooling water leak
1 March	Hinkley Point B	Carbon dioxide leak outside plant room
26 March	Dungeness B	Carbon dioxide leak in reactor basement
1 June	Hunterston B	Leak from condensate booster pump
2 June	Heysham 2	Leak in low pressure feed heater pipe work
18 July	Dungeness B	Leak of tritiated water identified
19 September	Hartlepool	Leak of pressure vessel cooling water identified on boiler closure unit
26 September	Dungeness B	Carbon dioxide leak from storage tank
28 September	Hunterston B	Steam leaks in high pressure gland pipe work
27 October	Oldbury	Carbon dioxide leak from fuelling machine
2008
19 February	Oldbury	Carbon dioxide leak from storage tank
20 February	Torness	Carbon dioxide leak from gas bypass plant
26 June	Heysham 2	Steam leak in gland steam drain line
26 July	Heysham 1	Carbon dioxide leak from storage tank
7 October	Wylfa	Carbon dioxide leak from storage tank
23 December	Torness	Carbon dioxide leak from valve in the fuel machine standby CO2 coolant supply.
2009
24 April	Hartlepool	Hydrogen leak from Unit 2 alternator frame
26 May	Heysham 1	Turbine cooling water leak
28 May	Hinkley Point B	Pressure vessel cooling water leak from Reactor 4 sump
25 June	Heysham 2	Loss of Hydrogen from turbo alternator
8 July	Torness	Leak from spent fuel pond cooling water system
9 December	Sellafield	Fuel pond chiller water leakage
21 December	Heysham 1	Back up cooling water leak soon after start up
2010
22 January	Sellafield	Leakage of cooling water to active storage tanks
7 June	Dungeness B	Gland steam leak after start up
26 October	Heysham 1	Small water leak from buffer store drain line
8 November	Heysham 1	Emergency cooling water pipe failure and leak

Fire
Date	Site	Incident
2005
4 February	Heysham 1	Smouldering lagging on turbine
8 March	Heysham 2	Fire on reactor basement sump pump
22 April	Harwell	Capacitor fire in building 459
22 June	Torness	Variable frequency output transformer fire
30 June	Barrow	Portacabin fire
8 Mar 2011 : Column 976W
14 July	Heysham 2	Fire in bearing of fuel handling plant extract fan
16 September	Torness	Fire in purge air compressor no. 2
31 October	Dungeness A	Fire in bulk group 4 LF power supply
2006
23 January	Sellafield	Smoking bitumen seal around pipe on Combined Heat and Power Plant turbine
24 March	Dounreay	Hydrogen ignition during waste cutting operation in Prototype Fast Reactor
21 April	Springfields	Uranium shredder fire in building 338
23 October	Heysham 2	Smouldering leak management tray beside hot turbine reheat pipe work
23 December	Burghfield	Smouldering cable in plant room
2007
1 February	Hinkley Point B	Fire in bund of gas circulator lube system
2 June	Hunterston B	Bearing fire on turbo generator 7
12 August	Heysham 2	Bearing fire in cooling water pump
2008
7 January	Dounreay	Fire in office suite of D1208
13 March	GE Healthcare	Fire in inactive recycling plant
15 June	Rolls Royce Manufacturing	Fire in glove box
2 December	Hartlepool	Aerosol can fire
3 December	Trawsfynydd	convector heater fire in ponds office
2009
12 March	Heysham 1	Lagging smoke/fire
15 March	GE Healthcare	Fire in services spine duct
31 March	Barrow	Fire on the casing of Astute Boat 2 during welding/grinding operations
18 April	Barrow	Fire on the bridge fin of Astute Boat I
29 April	Oldbury	Smoking air circuit breaker
18 May	Wylfa	Fire in Turbine alternator
22 July	Sellafield	Extract fan bearing fire
23November	Dungeness B	Boiler annex hydraulic fluid caught fire
2010
28 May	Dounreay	Small in cell fire of sodium residues
2 July	Sizewell B	Fire in ductwork in heating and ventilation building
4 July	Aldermaston	Solvent fire minor bums to one person
2 August	Oldbury	Lagging fire near turbo alternator
22 September	Sizewell B	Condensate pump fire
30 September	Wylfa	Smouldering electrical contactor in Turbine Hall
25 October	Hinkley Point B	Fire in circulator workshop
8 December	Heysham 2	Bearing failure causing smoke in services building