ENS 54896

v t e ENS Event
21:29 Sep 9, 2020
Title		Agreement State Report - Water Loss from Source Storage Pool
Event Description	The following is a synopsis of the report received from the State of Nebraska Division of Radioactive Materials via phone: The licensee reported that while they were responding to a product jam alarm they discovered some water on the floor by the source storage pool. In reviewing the control system operation log, the operators found the system had responded to a low water level by opening the make-up water valve. This is a normal system occurrence due to evaporation from the pool. The make-up valve did not close upon reaching the normal water level, so level in the pool continued to rise. Level reached the high water alarm point which is at the top of the pool. The drain valve opened at the high water alarm point causing level to drop, but some water had already overflowed from the pool onto the surrounding floor. Level continued to lower and upon reaching the low level setpoint the system correctly responded by closing the drain valve and reopening the make-up valve. The level control system then responded correctly and the make-up valve closed when water level returned to normal. The irradiator facility has replaced the level switches and updated the preventative maintenance frequency for the valves and switches to prevent a repeat of this event. The source was never uncovered. No release or personnel exposure occurred.

ENS 54896 +/-
Where
Ne Div Of Radioactive Materials Broken Bow, Nebraska (NRC Region 4)
License number:	04-01-01
Organization:	Ne Div Of Radioactive Materials
Reporting

Agreement State
Time - Person (Reporting Time:+40.45 h1.685 days <br />0.241 weeks <br />0.0554 months <br />)
Opened:	Brian Miller 13:56 Sep 11, 2020
NRC Officer:	Thomas Herrity
Last Updated:	Sep 11, 2020
54896 - NRC Website
v • d • e

v t e Emergency Notification System
Ne Div Of Radioactive Materials with Agreement State
WEEKMONTHYEAR	Agreement State Report - Water Loss from Source Storage Pool	2020-09-09T21:29:00 [Table view]
[ENS list for Ne Div Of Radioactive Materials]

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