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20 July 2009 : Column 1023W—continued

20 July 2009 : Column 1024W

20 July 2009 : Column 1025W

20 July 2009 : Column 1026W

Coolant leaks to environment
	Site	Incident
2001
14 March	Dungeness A	Carbon dioxide leak from high pressure pump on carbon dioxide plant
26 October	Hinkley Point B	Cooling water leak from turbine alternator 7 excitor
3 November	Heysham 1	Cooling water leak to turbine generator
3 December	Rosyth	Loss of coolant from primary circuit clean-up resin column
2002
6 February	Oldbury	Reactor 2 cooling water pipe failure
27 February	Hinkley point B	Leak of tritiated water from reactor bypass gas plant
31 March	Torness	Carbon dioxide leak from refuelling machine
14 May	Sizewell B	Indication of historic leak of primary coolant from control rod drive mechanism housing
26 June	Hunterston B	Leak of carbon dioxide from gas bypass plant
26 November	Hunterston B	Condenser leak on turbo generator 7
18 December	Hinkley point B	Leak of tritiated water from break tank
25 December	Dungeness B	Steam leak on reactor
2003
31 January	Heysham 2	Steam leak on boiler half unit valve
19 February	Heysham 1	Release of cooling water from buffer store tube vent valve
1 March	Dungeness B	Carbon dioxide leak from flange on clean side of reactor gas pressurising unit
16 March	Hunterston B	Steam leak in the supply pipe work to Unit 7 main boiler feed pump
3 April	Hunterston B	Clean carbon dioxide leak from failed bursting disc on gas bypass plant on Reactor 3
13 May	Dungeness A	Leak from LP feed water pipe to R1 boilers
15 July	Heysham 1	Carbon dioxide leak from pressure transducer on refuelling machine
27 July	Dungeness B	Leak of water from base of flask E97
14 August	Wylfa	Leak from a Boiler 1 feed water line flange
29 September	Dungeness A	Clean carbon dioxide leak from pipe work in R1 ponds area
7 December	Heysham 1	Leak of water from two failed joints in fuel route emergency cooling water 'A' main
2004
2 February	Oldbury	Leak from LF feed main stub pipe
30 March	Sizewell A	Carbon dioxide release through failed vacuum pump oil separator
31 March	Hunterston B	Leak from auxiliary cooling water pipe flange
7 April	Hunterston B	Carbon dioxide release from the gas bypass plant autoclave room vacuum pump
14 April	Hartlepool	Leak through crack in heat exchanger flange
19 April	Heysham 1	Carbon dioxide leak from west storage plant
5 May	Hunterston B	Cooling water leak from generator yellow phase enclosure
11 May	Hinkley Point B	Carbon dioxide leak from storage tank
16 May	Hinkley Point B	Leak from Reactor 4 condensate system
9 June	Hartlepool	Leak of tritiated water from radioactive effluent treatment plant
13 June	Torness	Carbon dioxide leak from storage tank
14 July	Sellafield	Leaking water from flask nappy in B205
14 July	Hunterston B	Carbon dioxide leak from storage tank bursting disc
21 July	Hinkley Point B	Carbon Dioxide leak from blowdown route
25 July	Heysham 1	Carbon Dioxide found in pressure vessel tendon box
3 August	Heysham 2	Carbon Dioxide leak from ring main
9 September	Hartlepool	Leak in low pressure back up cooling system pipe work
18 November	Heysham 1	Alternator hydrogen coolant leak
26 November	Heysham 2	Oil leak from transformer
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
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
28 September	Hunterston B	Steam leaks in high pressure gland pipe work
26 September	Dungeness B	Carbon dioxide leak from storage tank
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 supplys
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

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