ENS 50099

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v t e ENS Event
15:24 May 8, 2014
Title	High Pressure Fire Water Sprinkler System B-6 Declared Inoperable
Event Description	At 1024 CDT, on 05-08-2014, the Plant Shift Superintendent was notified that the C-333 High Pressure Fire Water (HPFW) Sprinkler System B-6 had been inspected by Fire Services and 5 sprinkler heads had visible corrosion or paint on them, including 2 heads adjacent to each other. The system configuration was evaluated using EN-C-822-99-047 [Engineering Notice], 'Effects of Impaired Sprinkler Heads on System Operability' and determined that with these heads potentially impaired, a portion of the building would not have sufficient sprinkler coverage. The HPFW system is required to be operable according to TSR LCO [Technical Safety Requirement Limiting Condition for Operation] 2.4.4.5. HPFW Sprinkler System B-6 was declared inoperable and TSR LCO 2.4.4.5 Required Action B was implemented for the area without sprinkler coverage. Based on past testing results, there is a possibility that the heads would have been able to perform their specified safety function. Once the heads are removed from the system, testing will be performed to determine the actual effect on operability. This event is reportable under 10 CFR 76.120(c)(2) as an event in which equipment required by the TSR is disabled or fails to function as designed. The NRC Region II (Marvin Sykes) has been notified of this event. PGDP Assessment and Tracking Report No. ATR-14-0444; PGDP Event Report No. PAD-2014-05; NRC Worksheet No. 50099; Responsible Division: Operations. * * RETRACTION FROM DEREK WARFORD TO VINCE KLCO AT 1932 EDT ON 5/16/2014 * * * Subsequent to the event, the corroded sprinkler heads were replaced with new heads and the removed heads were tested in the laboratory. Based on the test results, one of the adjacent heads that was potentially impaired was determined to be fully functional and in accordance with EN-C-822-99-047, HPFW Sprinkler System B-6 was capable of performing its intended safety function. Since this event does not meet the criteria for a reportable event under 10 CFR 76.120(c)(2) as an event in which equipment required by the TSR is disabled or fails to function as designed, the event notification is being retracted. The NRC Region II (Marvin Sykes) has been notified of this retraction. Notified the R2DO (Desai) and NMSS EO (Csontos).

ENS 50099 +/- *RETRACTED*
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:+5.85 h0.244 days <br />0.0348 weeks <br />0.00801 months <br />)
Opened:	Derek Warford 21:15 May 8, 2014
NRC Officer:	Steve Sandin
Last Updated:	May 16, 2014
50099 - 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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