05000263/FIN-2015008-04
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Finding | |
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| Title | Licensee-Identified Violation |
| Description | Title 10 CFR 72.158, Control of special processes, requires, in part, that licensees establish measures to ensure that special processes, including welding... and nondestructive testing, are controlled and accomplished by qualified personnel using qualified procedures in accordance with applicable codes, standards, specifications, criteria, and other special requirements. Contrary to the above, the licensee identified on May 10, 2014, the licensee failed to perform verifications of a calibrated leak test instrument used on DSC lid to shell welds in accordance with Procedure TN 61BT-61BTH-HSMLD, Helium Leak Testing for NUHOMS Systems, Revision 1. Procedure TN 61BT-61BTHHSMLD, Revision 1, performs helium leak tests to demonstrate compliance with TS 1.2.4.a, 61BTH DSC Helium Leak rate of Inner Seal Weld. Additionally, contrary to 10 CFR 72.158, on April 2, 2014, the licensee failed to ensure enough filler material was deposited to achieve the minimum depth of the shell to outer top cover plate weld on DSC 16 in accordance with Procedure 12751-MNGP-OPS, Spent Fuel Cask Welding: 61BT/BTH NUHOMS Canisters, Revision 0. Instructions for welding operations are provided in Procedure 12751 MNGP-OPS, Revision 0, to ensure in field fabrication is performed in accordance with the Final Safety Analysis Report design basis drawings. During a nuclear oversight review of 2013 dry cask storage loading operations, the licensee identified that the helium mass spectrometer leak detection, calibrated leak instrument verification stabilizations, were not performed in accordance with TN 61BT-61BTH-HSMLD, Revision 1. Specifically TN 61BT-61BTH-HSMLD, Revision 1, Steps 8.3 and 8.4, require the user to determine the final instrument indicated leakage rate with the calibrated standard open and closed. The procedure step requires the user to ensure the system stabilizes while determining these results. TN 61BT-61BTH-HSMLD, Revision 1, Note 2, defines a stable signal as no more than a 1.0 E-8 std cm3/sec deviation in the indicated signal in 60 seconds. The licensee determined that for DSC 11, 12, 14, 15 and 16, stabilization times were less than 60 seconds. Specifically for DSC 12, stabilization times with the calibrated standard open were performed in 24 seconds, and stabilization times with the calibrated standard closed were performed in 22 seconds. |
| Site: | Monticello  |
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| Report | IR 05000263/2015008 Section 4OA7 |
| Date counted | Sep 30, 2015 (2015Q3) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | Licensee-identified |
| Inspection Procedure: | |
| Inspectors (proximate) | M Learn P Zurawski R Edwards R Orlikowski |
| Violation of: | Technical Specification - Procedures Technical Specification |
| INPO aspect | |
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Finding - Monticello - IR 05000263/2015008 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Monticello) @ 2015Q3
Self-Identified List (Monticello)
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