The following information was provided by the State of
Arkansas via email:
During routine shutter checks performed by the licensee on June 6, 2017, the licensee noted that the shutter would not close.
The gauge is identified as Berthold Model LB 300 L source holder containing 0.189 milliCuries of Cobalt-60.
The gauge remains operational in the normal use location and the RSO will place additional signs in the area. No maintenance is planned in the area that would require closing of the shutter. The RSO has performed a radiation survey to ensure that radiation exposure is maintained at less than 2 mR/hr in the vicinity of the gauge.
The licensee has contacted the technical representative who was expected to be at the facility on July 6, 2017, for other maintenance and will examine this gauge.
In accordance with RH-1502.f.2 (10 CFR 30.50(b)(2)) the malfunctioning shutter is reportable within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />.
The State of Arkansas is awaiting a written report from the licensee and final disposition information for the gauge. The State's event number is AR-2017-003.
- * * UPDATE ON 3/20/2018 AT 1520 EDT FROM STEVE MACK TO DONG PARK * * *
The following was received via e-mail:
A report submitted on July 3, 2017, indicated that the cause of the shutter failure was the exposure to alkaline pulp material and the carbon steel construction of the source holder. The source holder was replaced on January 9, 2018 with a comparable source holder constructed of stainless steel. The Department [Arkansas Department of Health] considers this event to be closed.
Notified R4DO (Groom) and
NMSS Events Notification via email.