The following information was summarized from the report submitted by TriVis via facsimile:
David Bland, President of TriVis Inc. reported that two contract Non-Destructive Evaluation (NDE) Level II examiners, employed by TriVis, failed to meet NDE procedural requirements for weld testing on the Outer Top Cover Plate (OTCP) on six Transnuclear Model NUHOMS-61BTH Dry Shield Canisters (DSC) at the Monticello Nuclear Generating Plant.
An NRC inspector observed part of this activity and questioned whether the dwell times for the penetrant and developer used by a NDE Level II employee of TriVis were sufficient to meet procedural requirements. Upon evaluating recorded video of the work location, it was determined that the dwell times for both the penetrant and the developer of the OTCP weld on DSC #16 were not in compliance with the TriVis NDE LPT [Liquid Penetrant Test] Procedure. An extent of condition review of previous LPT exams conducted on DSCs 11 through 16 revealed additional examinations that were not in compliance with the dwell times specified by the procedure as well as other procedural discrepancies.
All six DSCs were declared inoperable at the time of discovery. All work activities associated with dry fuel storage at Monticello were stopped. A timeline and corrective actions are being developed by TriVis and the licensee.
The two NDE Level II examiners were not previously employed by TriVis and did not perform any other NDE activities at Monticello.
Evaluations will be completed by January 31, 2014 or a follow-up interim report will be submitted.
The licensee notified the NRC Resident Inspector.
- * * UPDATE FROM MIKE SOUTH TO DANIEL MILLS ON 1/29/14 AT 0945 EDT * * *
The following information was selected from the report submitted by TriVis via facsimile:
TriVis has completed its evaluation of the activity and determined that it is limited to procedural non-compliance on DSCs 11 through 16 at [Monticello] only. Based on the results of the evaluation, TriVis believes the procedural non-compliance did not adversely affect the health and safety of the public and does not constitute a substantial safety hazard.
Notified R3DO (Sheldon), and
NRR Part 21 Group (via email).