ND 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 2001 to June 2009 has been undertaken for details of leaks and fires at nuclear installations. This identifies the relevant information in the tables. Such data are not available for the period before January 2001."Notes:""1. 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.""2. A 'fire' has been interpreted as being a situation where ignition of material has taken place on the licensed site or instances of smouldering there where such ignition could not reasonably be ruled out given the information in the record."<Table width="100%" summary="" cellspacing="3" cellpadding="3" border="0"><thead><tr><th>Coolant leaks to environment</th></tr></thead><TR><TD></TD><TD>Site</TD><TD>Incident</TD></TR><TR><TD>2001</TD><TD></TD><TD></TD></TR><TR><TD>14 March</TD><TD>Dungeness A</TD><TD>Carbon dioxide leak from high pressure pump on carbon dioxide plant</TD></TR><TR><TD>26 October</TD><TD>Hinkley Point B</TD><TD>Cooling water leak from turbine alternator 7 excitor</TD></TR><TR><TD>3 November</TD><TD>Heysham 1</TD><TD>Cooling water leak to turbine generator</TD></TR><TR><TD>3 December</TD><TD>Rosyth</TD><TD>Loss of coolant from primary circuit clean-up resin column</TD></TR><TR><TD></TD><TD></TD><TD></TD></TR><TR><TD>2002</TD><TD></TD><TD></TD></TR><TR><TD>6 February</TD><TD>Oldbury</TD><TD>Reactor 2 cooling water pipe failure</TD></TR><TR><TD>27 February</TD><TD>Hinkley point B</TD><TD>Leak of tritiated water from reactor bypass gas plant</TD></TR><TR><TD>31 March</TD><TD>Torness</TD><TD>Carbon dioxide leak from refuelling machine</TD></TR><TR><TD>14 May</TD><TD>Sizewell B</TD><TD>Indication of historic leak of primary coolant from control rod drive mechanism housing</TD></TR><TR><TD>26 June</TD><TD>Hunterston B</TD><TD>Leak of carbon dioxide from gas bypass plant</TD></TR><TR><TD>26 November</TD><TD>Hunterston B</TD><TD>Condenser leak on turbo generator 7</TD></TR><TR><TD>18 December</TD><TD>Hinkley point B</TD><TD>Leak of tritiated water from break tank</TD></TR><TR><TD>25 December</TD><TD>Dungeness B</TD><TD>Steam leak on reactor</TD></TR><TR><TD></TD><TD></TD><TD></TD></TR><TR><TD>2003</TD><TD></TD><TD></TD></TR><TR><TD>31 January</TD><TD>Heysham 2</TD><TD>Steam leak on boiler half unit valve</TD></TR><TR><TD>19 February</TD><TD>Heysham 1</TD><TD>Release of cooling water from buffer store tube vent valve</TD></TR><TR><TD>1 March</TD><TD>Dungeness B</TD><TD>Carbon dioxide leak from flange on clean side of reactor gas pressurising unit</TD></TR><TR><TD>16 March</TD><TD>Hunterston B</TD><TD>Steam leak in the supply pipe work to Unit 7 main boiler feed pump</TD></TR><TR><TD>3 April</TD><TD>Hunterston B</TD><TD>Clean carbon dioxide leak from failed bursting disc on gas bypass plant on Reactor 3</TD></TR><TR><TD>13 May</TD><TD>Dungeness A</TD><TD>Leak from LP feed water pipe to R1 boilers</TD></TR><TR><TD>15 July</TD><TD>Heysham 1</TD><TD>Carbon dioxide leak from pressure transducer on refuelling machine</TD></TR><TR><TD>27 July</TD><TD>Dungeness B</TD><TD>Leak of water from base of flask E97</TD></TR><TR><TD>14 August</TD><TD>Wylfa</TD><TD>Leak from a Boiler 1 feed water line flange</TD></TR><TR><TD>29 September</TD><TD>Dungeness A</TD><TD>Clean carbon dioxide leak from pipe work in R1 ponds area</TD></TR><TR><TD>7 December</TD><TD>Heysham 1</TD><TD>Leak of water from two failed joints in fuel route emergency cooling water 'A' main</TD></TR><TR><TD></TD><TD></TD><TD></TD></TR><TR><TD>2004</TD><TD></TD><TD></TD></TR><TR><TD>2 February</TD><TD>Oldbury</TD><TD>Leak from LF feed main stub pipe</TD></TR><TR><TD>30 March</TD><TD>Sizewell A</TD><TD>Carbon dioxide release through failed vacuum pump oil separator</TD></TR><TR><TD>31 March</TD><TD>Hunterston B</TD><TD>Leak from auxiliary cooling water pipe flange</TD></TR><TR><TD>7 April</TD><TD>Hunterston B</TD><TD>Carbon dioxide release from the gas bypass plant autoclave room vacuum pump</TD></TR><TR><TD>14 April</TD><TD>Hartlepool</TD><TD>Leak through crack in heat exchanger flange</TD></TR><TR><TD>19 April</TD><TD>Heysham 1</TD><TD>Carbon dioxide leak from west storage plant</TD></TR><TR><TD>5 May</TD><TD>Hunterston B</TD><TD>Cooling water leak from generator yellow phase enclosure</TD></TR><TR><TD>11 May</TD><TD>Hinkley Point B</TD><TD>Carbon dioxide leak from storage tank</TD></TR><TR><TD>16 May</TD><TD>Hinkley Point B</TD><TD>Leak from Reactor 4 condensate system</TD></TR><TR><TD>9 June</TD><TD>Hartlepool</TD><TD>Leak of tritiated water from radioactive effluent treatment plant</TD></TR><TR><TD>13 June</TD><TD>Torness</TD><TD>Carbon dioxide leak from storage tank</TD></TR><TR><TD>14 July</TD><TD>Sellafield</TD><TD>Leaking water from flask nappy in B205</TD></TR><TR><TD>14 July</TD><TD>Hunterston B</TD><TD>Carbon dioxide leak from storage tank bursting disc</TD></TR><TR><TD>21 July</TD><TD>Hinkley Point B</TD><TD>Carbon Dioxide leak from blowdown route</TD></TR><TR><TD>25 July</TD><TD>Heysham 1</TD><TD>Carbon Dioxide found in pressure vessel tendon box</TD></TR><TR><TD>3 August</TD><TD>Heysham 2</TD><TD>Carbon Dioxide leak from ring main</TD></TR><TR><TD>9 September</TD><TD>Hartlepool</TD><TD>Leak in low pressure back up cooling system pipe work</TD></TR><TR><TD>18 November</TD><TD>Heysham 1</TD><TD>Alternator hydrogen coolant leak</TD></TR><TR><TD>26 November</TD><TD>Heysham 2</TD><TD>Oil leak from transformer</TD></TR><TR><TD></TD><TD></TD><TD></TD></TR><TR><TD>2005</TD><TD></TD><TD></TD></TR><TR><TD>1 January</TD><TD>Heysham 2</TD><TD>Steam leak on Turbine Generator 7</TD></TR><TR><TD>5 February</TD><TD>Hinkley Point B</TD><TD>Carbon dioxide leak from tank</TD></TR><TR><TD>19 February</TD><TD>Hinkley Point B</TD><TD>Carbon dioxide leak from tank</TD></TR><TR><TD>25 February</TD><TD>Torness</TD><TD>Carbon dioxide leak through in-service inspection penetration</TD></TR><TR><TD>15 March</TD><TD>Torness</TD><TD>Carbon dioxide leak from ring main</TD></TR><TR><TD>25 June</TD><TD>Dungeness A</TD><TD>Carbon dioxide leak from main CO2 plant</TD></TR><TR><TD>4 July</TD><TD>Sellafield</TD><TD>Damp patch discovered adjacent to B30 pond wall</TD></TR><TR><TD>25 July</TD><TD>Oldbury</TD><TD>Steam leak through thermocouple pocket of Boiler 4 on Reactor 1</TD></TR><TR><TD>4 August</TD><TD>Hinkley Point B</TD><TD>Carbon dioxide leak from vaporiser valve</TD></TR><TR><TD>30 October</TD><TD>Dungeness A</TD><TD>Carbon dioxide leak through failed isolation valve to pressure gauge</TD></TR><TR><TD></TD><TD></TD><TD></TD></TR><TR><TD>2006</TD><TD></TD><TD></TD></TR><TR><TD>30 January</TD><TD>Sellafield</TD><TD>Leak of dosed cooling water from B832 cooling tower</TD></TR><TR><TD>18 February</TD><TD>Sellafield</TD><TD>Leak of pond water through expansion joint above the stainless steel seal in B310 AGR storage pond</TD></TR><TR><TD>24 March</TD><TD>Hunterston B</TD><TD>Carbon dioxide leak in pipe trench</TD></TR><TR><TD>11 September</TD><TD>Hinkley point B</TD><TD>Carbon dioxide leak from supply pump</TD></TR><TR><TD>23 September</TD><TD>Hartlepool</TD><TD>Alternator hydrogen coolant leak</TD></TR><TR><TD>26 September</TD><TD>Hartlepool</TD><TD>Fracture of emergency cooling water main</TD></TR><TR><TD>2 October</TD><TD>Dungeness B</TD><TD>Auxiliary cooling water pipe work leak</TD></TR><TR><TD>15 October</TD><TD>Sizewell A</TD><TD>Steam leak from Turbine Alternator 1</TD></TR><TR><TD>18 November</TD><TD>Heysham 2</TD><TD>Steam leak from Reactor 7</TD></TR><TR><TD></TD><TD></TD><TD></TD></TR><TR><TD>2007</TD><TD></TD><TD></TD></TR><TR><TD>7 January</TD><TD>Sizewell A</TD><TD>Fracture of pond recirculating water system pipe work</TD></TR><TR><TD>18 January</TD><TD>Sellafield</TD><TD>Waste Vitrification Plant electrical inductor cooling water leak</TD></TR><TR><TD>1 March</TD><TD>Hinkley Point B</TD><TD>Carbon dioxide leak outside plant room</TD></TR><TR><TD>26 March</TD><TD>Dungeness B</TD><TD>Carbon dioxide leak in reactor basement</TD></TR><TR><TD>1 June</TD><TD>Hunterston B</TD><TD>Leak from condensate booster pump</TD></TR><TR><TD>2 June</TD><TD>Heysham 2</TD><TD>Leak in low pressure feed heater pipe work</TD></TR><TR><TD>18 July</TD><TD>Dungeness B</TD><TD>Leak of tritiated water Identified</TD></TR><TR><TD>19 September</TD><TD>Hartlepool</TD><TD>Leak of pressure vessel cooling water identified on boiler closure unit</TD></TR><TR><TD>28 September</TD><TD>Hunterston B</TD><TD>Steam leaks in high pressure gland pipe work</TD></TR><TR><TD>26 September</TD><TD>Dungeness B</TD><TD>Carbon dioxide leak from storage tank</TD></TR><TR><TD>27 October</TD><TD>Oldbury</TD><TD>Carbon dioxide leak from fuelling machine</TD></TR><TR><TD></TD><TD></TD><TD></TD></TR><TR><TD>2008</TD><TD></TD><TD></TD></TR><TR><TD>19 February</TD><TD>Oldbury</TD><TD>Carbon dioxide leak from storage tank</TD></TR><TR><TD>20 February</TD><TD>Torness</TD><TD>Carbon dioxide leak from gas bypass plant</TD></TR><TR><TD>26 June</TD><TD>Heysham 2</TD><TD>Steam leak in gland steam drain line</TD></TR><TR><TD>26 July</TD><TD>Heysham 1</TD><TD>Carbon dioxide leak from storage tank</TD></TR><TR><TD>7 October</TD><TD>Wylfa</TD><TD>Carbon dioxide leak from storage tank</TD></TR><TR><TD>23 December</TD><TD>Torness</TD><TD>Carbon dioxide leak from valve in the fuel machine standby CO2 coolant supplys</TD></TR><TR><TD></TD><TD></TD><TD></TD></TR><TR><TD>2009</TD><TD></TD><TD></TD></TR><TR><TD>24 April</TD><TD>Hartlepool</TD><TD>Hydrogen leak from Unit 2 alternator frame</TD></TR><TR><TD>26 May</TD><TD>Heysham 1</TD><TD>Turbine cooling water leak</TD></TR><TR><TD>28 May</TD><TD>Hinkley Point B</TD><TD>Pressure vessel cooling water leak from Reactor 4 sump</TD></TR></Table><Table width="100%" summary="" cellspacing="3" cellpadding="3" border="0"><thead><tr><th>Fire</th></tr></thead><TR><TD></TD><TD>Site</TD><TD>Incident</TD></TR><TR><TD>2001</TD><TD></TD><TD></TD></TR><TR><TD>18 January</TD><TD>Hunterston B</TD><TD>Control transformer fire in gas circulator workshop</TD></TR><TR><TD>14 February</TD><TD>Hunterston A</TD><TD>Fire in pit in charge machine maintenance building</TD></TR><TR><TD>18 February</TD><TD>Dungeness A</TD><TD>Fire near No. 1 bearing</TD></TR><TR><TD>14 March</TD><TD>Sellafield</TD><TD>Fire during sawing of camera frame</TD></TR><TR><TD>19 May</TD><TD>Dungeness A</TD><TD>Fire in region of slip ring and alternator on turbo-alternator 2</TD></TR><TR><TD>14 June</TD><TD>Hunterston B</TD><TD>Fire in lagging below pump main bearing</TD></TR><TR><TD>16 June</TD><TD>Harwell</TD><TD>Fire in fan assembly in electrical trunking on Helios 1 linear accelerator facility</TD></TR><TR><TD>20 June</TD><TD>Dounreay</TD><TD>Sodium/potassium fire in Dounreay Fast Reactor sphere</TD></TR><TR><TD>4 July</TD><TD>Sellafield</TD><TD>Fire in portable beta-in-air activity monitor</TD></TR><TR><TD>11 July</TD><TD>Amersham</TD><TD>Fire in administration building</TD></TR><TR><TD>18 July</TD><TD>Dounreay</TD><TD>Fire in sodium/potassium heating loop on Dounreay Fast Reactor</TD></TR><TR><TD>27 July</TD><TD>Berkeley Centre</TD><TD>Sodium and natural uranium fire in fume cupboard</TD></TR><TR><TD>30 August</TD><TD>Harwell</TD><TD>Fire in building 424</TD></TR><TR><TD>27 September</TD><TD>Hunterston B</TD><TD>Air circulation fan motor fire in electrical switch room</TD></TR><TR><TD>23 October</TD><TD>Dungeness B</TD><TD>Fire in canteen deep fat fryer</TD></TR><TR><TD>24 October</TD><TD>Heysham 2</TD><TD>Fire in incinerator fire box</TD></TR><TR><TD>30 October</TD><TD>Dounreay</TD><TD>Uranium residue fire in a D1202 glovebox</TD></TR><TR><TD>14 November</TD><TD>Wylfa</TD><TD>Fire in services switchboard transformer</TD></TR><TR><TD>1 December</TD><TD>Heysham 1</TD><TD>Fire on scaffolding in turbine hall basement</TD></TR><TR><TD>3 December</TD><TD>Hunterston B</TD><TD>Light fitting fire in outage planning building</TD></TR><TR><TD></TD><TD></TD><TD></TD></TR><TR><TD>2002</TD><TD></TD><TD></TD></TR><TR><TD>9 March</TD><TD>Hinkley Point B</TD><TD>Lagging fire on Turbine 8 steam drain lines</TD></TR><TR><TD>11 April</TD><TD>Dungeness B</TD><TD>Smouldering lagging on turbine (1)</TD></TR><TR><TD>11 April</TD><TD>Dungeness B</TD><TD>Smouldering lagging on turbine (2)</TD></TR><TR><TD>29 May</TD><TD>Dounreay</TD><TD>Fire in D1207 roof void</TD></TR><TR><TD>12 July</TD><TD>Oldbury</TD><TD>Circulator lagging fire</TD></TR><TR><TD>13 August</TD><TD>Berkeley Centre</TD><TD>Fire in multiplexor unit</TD></TR><TR><TD>27 November</TD><TD>Hunterston B</TD><TD>Fire in light fitting</TD></TR><TR><TD>21 December</TD><TD>Heysham 1</TD><TD>Fire in turbine electrical terminal box</TD></TR><TR><TD></TD><TD></TD><TD></TD></TR><TR><TD>2003</TD><TD></TD><TD></TD></TR><TR><TD>10 January</TD><TD>Hunterston B</TD><TD>Bearing fire in Main Control Building air conditioning compressor</TD></TR><TR><TD>27 January</TD><TD>Heysham 1</TD><TD>Ignition of expansion joint on pile cap</TD></TR><TR><TD>15 February</TD><TD>Dounreay</TD><TD>Waste drum fire in DN026 waste store</TD></TR><TR><TD>25 April</TD><TD>Heysham 2</TD><TD>Bearing fire in Turbine 8</TD></TR><TR><TD>8 June</TD><TD>Hunterston B</TD><TD>Fire in 415 V electrical supply board</TD></TR><TR><TD>8 July</TD><TD>Heysham 2</TD><TD>Lagging fire on main boiler feed pump</TD></TR><TR><TD>11 July</TD><TD>Dungeness B</TD><TD>Boiler feed pump primary oil pump fire</TD></TR><TR><TD>15 July</TD><TD>Harwell</TD><TD>Fire in B220 Laboratory GB38 fume cupboard</TD></TR><TR><TD>17 July</TD><TD>Wylfa</TD><TD>Light fitting fire above TA1</TD></TR><TR><TD>30 July</TD><TD>Rolls Royce Manufacturing</TD><TD>Swarf fire during machining in Clean Shop</TD></TR><TR><TD>28 August</TD><TD>Barrow</TD><TD>Smouldering plastic during burning-off operation</TD></TR><TR><TD>2 October</TD><TD>Hinkley Point B</TD><TD>Debris fire in R3 Circulator Hall</TD></TR><TR><TD>4 October</TD><TD>Heysham 2</TD><TD>Lagging fire between bearings 4 and 5 of turbine 8</TD></TR><TR><TD>24 October</TD><TD>Devonport</TD><TD>Welding fire in sonar transducer space</TD></TR><TR><TD>16 December</TD><TD>BNFL Capenhurst</TD><TD>Fire in pit beneath smelter</TD></TR><TR><TD></TD><TD></TD><TD></TD></TR><TR><TD>2004</TD><TD></TD><TD></TD></TR><TR><TD>13 January</TD><TD>Sellafield</TD><TD>Two Magnox fuel decanning fires in Fuel Handling Plant</TD></TR><TR><TD>22 January</TD><TD>Hunterston B</TD><TD>Fire in reactor building lift motor room</TD></TR><TR><TD>5 February</TD><TD>Bradwell</TD><TD>Fire in portable water pump to showers in turbine hall</TD></TR><TR><TD>7 March</TD><TD>Hunterston A</TD><TD>Vacuum cleaner motor fire</TD></TR><TR><TD>27 May</TD><TD>Hunterston B</TD><TD>Electric motor fire in low level waste building annex</TD></TR><TR><TD>13 June</TD><TD>Heysham 2</TD><TD>Power supply cubicle fire</TD></TR><TR><TD>17 June</TD><TD>Hinkley Point B</TD><TD>Smouldering wash water pump drive belt</TD></TR><TR><TD>20 July</TD><TD>Berkeley</TD><TD>Fire in building C24</TD></TR><TR><TD>4 October</TD><TD>Hunterston B</TD><TD>Main boiler feed pump lagging fire</TD></TR><TR><TD>13 October</TD><TD>Sizewell A</TD><TD>Inboard pump bearing fire</TD></TR><TR><TD>28 October</TD><TD>Drigg</TD><TD>Combustion of loose waste material</TD></TR><TR><TD>17 November</TD><TD>Bradwell</TD><TD>Fire in reactor building electrical socket</TD></TR><TR><TD></TD><TD></TD><TD></TD></TR><TR><TD>2005</TD><TD></TD><TD></TD></TR><TR><TD>4 February</TD><TD>Heysham 1</TD><TD>Smouldering lagging on turbine</TD></TR><TR><TD>8 March</TD><TD>Heysham 2</TD><TD>Fire on reactor basement sump pump</TD></TR><TR><TD>22 April</TD><TD>Harwell</TD><TD>Capacitor fire in building 459</TD></TR><TR><TD>22 June</TD><TD>Torness</TD><TD>Variable frequency output transformer fire</TD></TR><TR><TD>30 June</TD><TD>Barrow</TD><TD>Portacabin fire</TD></TR><TR><TD>14 July</TD><TD>Heysham 2</TD><TD>Fire in bearing of fuel handling plant extract fan</TD></TR><TR><TD>16 September</TD><TD>Torness</TD><TD>Fire in purge air compressor No. 2</TD></TR><TR><TD>31 October</TD><TD>Dungeness A</TD><TD>Fire in bulk group 4 LF power supply</TD></TR><TR><TD></TD><TD></TD><TD></TD></TR><TR><TD>2006</TD><TD></TD><TD></TD></TR><TR><TD>23 January</TD><TD>Sellafield</TD><TD>Smoking bitumen seal around pipe on Combined Heat and Power Plant turbine</TD></TR><TR><TD>24 March</TD><TD>Dounreay</TD><TD>Hydrogen ignition during waste cutting operation in Prototype Fast Reactor</TD></TR><TR><TD>21 April</TD><TD>Springfields</TD><TD>Uranium shredder fire in building 338</TD></TR><TR><TD>23 October</TD><TD>Heysham 2</TD><TD>Smouldering leak management tray beside hot turbine reheat pipework</TD></TR><TR><TD>23 December</TD><TD>Burghfieid</TD><TD>Smouldering cable in plant room</TD></TR><TR><TD></TD><TD></TD><TD></TD></TR><TR><TD>2007</TD><TD></TD><TD></TD></TR><TR><TD>1 February</TD><TD>Hinkley Point B</TD><TD>Fire in bund of gas circulator lube system</TD></TR><TR><TD>2 June</TD><TD>Hunterston B</TD><TD>Bearing fire on turbogenerator 7</TD></TR><TR><TD>12 August</TD><TD>Heysham 2</TD><TD>Bearing fire in cooling water pump</TD></TR><TR><TD></TD><TD></TD><TD></TD></TR><TR><TD>2008</TD><TD></TD><TD></TD></TR><TR><TD>7 January</TD><TD>Dounreay</TD><TD>Fire in office suite of D1208</TD></TR><TR><TD>13 March</TD><TD>GE Healthcare</TD><TD>Fire in inactive recycling plant</TD></TR><TR><TD>15 June</TD><TD>Rolls Royce Manufacturing</TD><TD>Fire in glove box</TD></TR><TR><TD>2 December</TD><TD>Hartlepool</TD><TD>Aerosol can fire</TD></TR><TR><TD>3 December</TD><TD>Trawsfynydd</TD><TD>Convector heater fire in ponds office</TD></TR><TR><TD></TD><TD></TD><TD></TD></TR><TR><TD>2009</TD><TD></TD><TD></TD></TR><TR><TD>12 March</TD><TD>Heysham 1</TD><TD>Lagging smoke/fire</TD></TR><TR><TD>15 March</TD><TD>GE Healthcare</TD><TD>Fire in services spine duct</TD></TR><TR><TD>31 March</TD><TD>Barrow</TD><TD>Fire on the casing of Astute Boat 2 during welding/grinding operations</TD></TR><TR><TD>18 April</TD><TD>Barrow</TD><TD>Fire on the bridge fin of Astute Boat 1</TD></TR><TR><TD>29 April</TD><TD>Oldbury</TD><TD>Smoking air circuit breaker</TD></TR><TR><TD>18 May</TD><TD>Wylfa</TD><TD>Fire in Turbine alternator</TD></TR></Table>