ENS 49953

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v t e ENS Event
01:50 Mar 24, 2014
Title	Safety Equipment Potential Failure - High Pressure Fire Water Sprinkler System
Event Description	At 2050 CDT, on 03-23-2014, the Plant Shift Superintendent was notified that the C-333 High Pressure Fire Water (HPFW) Sprinkler System A-16 had been inspected by Fire Services and 11 sprinkler heads had visible corrosion on them, including 4 heads adjacent to each other. The system configuration was evaluated using EN-C-822-99-047, '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 [Technical Safety Review] TSR LCO 2.4.4.5. HPFW system A-16 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 affect 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-14-0324; PGDP Event Report No. PAD-2014-03; NRC Worksheet No. 49953 Responsible Division: Operations TSR LCO 2.4.4.5 Action B requires an hourly fire patrol in the affected area. * RETRACTION ON 3/28/14 AT 1959 EDT FROM JOE BARLETTO TO DONG PARK * * 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 and the operability criteria defined in EN-C-822-99-047, A-16 was capable of performing its intended safety function. The clustered heads were on a single branch line in a ceiling beam pocket. The middle head failed testing, however overlapping coverage was provided by the adjacent heads on both sides. Notified R2DO (Sykes).

ENS 49953 +/-
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:+15.17 h0.632 days <br />0.0903 weeks <br />0.0208 months <br />)
Opened:	Ron Dockery 17:00 Mar 24, 2014
NRC Officer:	Jeff Rotton
Last Updated:	Mar 28, 2014
49953 - 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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