ENS 55832

v t e ENS Event
21:40 Apr 7, 2022
Title	Proportional Counter Failure
Event Description	The following information was received from the Washington State Department of Health via email: The Radiation Protection Manager (RPM) for US Ecology (USE) notified the Washington State Department of Health (WDOH) on April 7, 2022, at 1440 PDT, of equipment which failed to function as designed in accordance with WAC 246-221-250 (2)(d). This was identified during an internal surveillance of the calibration program by the licensee. Specifically, the equipment is a Canberra Series 5 Extreme Low Background Alpha Beta Proportional counter (XLB). The spreadsheet used to calculate alpha efficiency to determine alpha activity from smears and air samples was off by 1 percent. The error for this matter will require USE to review all data from September 2021 through April 6, 2022. The preliminary cause was identified as a human performance error. An investigation is ongoing to determine the impact to health and safety. WDOH is planning a follow up investigation the week of May 9, 2022, to follow up for this matter. No media attention currently. WA incident no.: WMS-INC-22-01

ENS 55832 +/-
Where
Us Ecology Washington Inc. Richland, Washington (NRC Region 4)
License number:	WN-I019-2
Organization:	Wa Office Of Radiation Protection
Reporting

Agreement State
Time - Person (Reporting Time:+16.5 h0.688 days <br />0.0982 weeks <br />0.0226 months <br />)
Opened:	Gregorio Rosado 14:10 Apr 8, 2022
NRC Officer:	Brian Lin
Last Updated:	Apr 8, 2022
55832 - NRC Website
v • d • e

v t e Emergency Notification System
Us Ecology Washington Inc. with Agreement State
WEEKMONTHYEAR2022-04-07T21:40:00 [Table view]
[ENS list for Us Ecology Washington Inc.]

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