ENS 43305

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v t e ENS Event
00:15 Apr 17, 2007
Title	Large Water Leak on High Pressure Fire Water System
Event Description	At 1915, on 04/16/07, the Plant Shift Superintendent was notified of a large water leak on High Pressure Fire Water system. This system provides water for fire suppression to the plants process buildings. An alarm was received indicating a drop in the level of High Pressure Fire Water (HPFW) elevated tank. The buildings were contacted to look for a large water leak and the leak was quickly located inside the C-337 process building. The exact system leaking was not apparent as the leak was under the building concrete floor. To stop the leak the HPFW pumps supporting the system were shutdown and the sectional valves outside the building were closed. This action made the HPFW system for all process buildings inoperable. LCO actions 2.4.4.8 and 2.4.4.6 were entered. The leak was determined to be on C-337 system C-12 and this system and the two adjacent systems were isolated and all other previously isolated valves were reopened. The HPFW pumps were restarted and the HPFW elevated tank was refilled to the TSR required level. These actions restored HPFW operability to the other areas in the plant at 2101 hours0.0243 days <br />0.584 hours <br />0.00347 weeks <br />7.994305e-4 months <br />. TSR required hourly fire patrols were initiated for the affected area in C-337. The leak is located on an underground eight inch header under the alarm and actuation controls for system C-12 inside the building. This is being reported as an event in which equipment is disabled or fail to function as designed when the equipment is required by a TSR to be available and operable and either should have been operating or should have operated on demand, and no redundant equipment is available. The licensee stated that this leak caused substantial damage to the concrete pad on the floor of the building. No structural damage is believe to have occurred but the concrete pad with have to be completely removed, the piping repaired, and eroded earth backfilled. A new concrete pad will then likely need to be poured. Nearly half a million gallons of water may have been lost through the break before it was isolated. The licensee has checked the site outfalls and no contamination was detected. The licensee notified the NRC Resident Inspector.

ENS 43305 +/-
Where
Paducah Gaseous Diffusion Plant Paducah, Kentucky (NRC Region 2)
License number:	GDP-1
Reporting

10 CFR 76.120(c)(2)
Time - Person (Reporting Time:+11.35 h0.473 days <br />0.0676 weeks <br />0.0155 months <br />)
Opened:	Billy Wallace 11:36 Apr 17, 2007
NRC Officer:	Bill Huffman
Last Updated:	Apr 17, 2007
43305 - NRC Website
v • d • e

v t e Emergency Notification System
Paducah Gaseous Diffusion Plant with 10 CFR 76.120(c)(2)
WEEKMONTHYEAR2014-05-08T15:24:00 [Table view]
[ENS list for Paducah Gaseous Diffusion Plant]

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