ENS 50667

v t e ENS Event
03:00 Dec 10, 2014
Title	Fixed Gauge Shutter Stuck in Closed Position
Event Description	At approximately 2200 EST, on December 09, 2014, an area operator attempted to open the shutter on source holder 10071961 (Hemlock identifier). The shutter operation failed with the shutter stuck in the closed position. The operator then contacted an area Equipment Care Operator who verified the shutter would not operate. The area operator informed a day tech of the failed shutter operation on December 10, 2014. Operating the shutter was part of a routine annual calibration PM [preventive maintenance]. The process was previously shut down, therefore, this incident caused no loss of production. The source holder is located at S-457 on HP tank 35600. Fixed gauge: Vega America Source Holder Model SHF 2-B with Cs-137 800 millicurie source. * * UPDATE FROM CHRISTOPHER VAN HAMPLER TO DANIEL MILLS AT 0904 EST ON 12/15/2014 * * * The licensee performed a radiation survey of the fixed gauge which indicated higher than expected radiation readings (40 mR/hr at <30 cm). Based on these readings, the licensee has determined that the shutter is stuck in a partially open position. The licensee has contacted the manufacturer to repair the device. Notified R3DO (Skokowski) and NMSS Events Notification (via email)

ENS 50667 +/-
Where
Hemlock Semiconductor Hemlock, Michigan (NRC Region 3)
License number:	21-32682-01
Organization:	Hemlock Semiconductor
Reporting

10 CFR 30.50(b)(2), Licensed Material Protection Equipment Failure
Time - Person (Reporting Time:+16.72 h0.697 days <br />0.0995 weeks <br />0.0229 months <br />)
Opened:	Kelly Deering 19:43 Dec 10, 2014
NRC Officer:	Jeff Rotton
Last Updated:	Dec 15, 2014
50667 - NRC Website
v • d • e

v t e Emergency Notification System
Hemlock Semiconductor with 10 CFR 30.50(b)(2)
WEEKMONTHYEAR2024-10-07T18:30:00 [Table view]
[ENS list for Hemlock Semiconductor]

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