On July 1, 2014, at approximately 1500 EDT, as a result of an investigation into a report that the electronics associated with the air operated source controller of a J. L. Shepherd Model 149 Neutron Calibrator was not working properly, it was concluded that the electronics for the air operated source controller had failed. The failure would have allowed the source to be withdrawn without the electronic circuit being energized. The original source contained 8.5 Ci of Pu-Be. The calibrator is designed to expose a neutron source on a signal from a control circuit using air to withdraw the source. In this event, source withdrawal was initiated when air was aligned without the control circuit being energized; the air was immediately isolated preventing the source from being withdrawn. The calibrator has been removed from service due to the control circuit failure. The source is in the safe position, tagged and locked with the air line disabled. This failure did not result in any personnel exposure.
This is reportable under 10 CFR 70.50(b)(2) since the circuit is required by design to be operable when the calibrator is used. The cause of the failure has not been determined at this time.
The affected calibrator is not part of any installed plant equipment and has no impact on plant operation.
The licensee has notified the NRC Resident Inspector.
The licensee will notify the
New York Public Service Commission.
