This violation of very low safety significant was identified by the licensee and has been entered into the licensee corrective action program and is being treated as an
NCV, consistent with Section 2.3.2 of the
Enforcement Policy. Violation: NAC-Magnastor Certificate of Compliance 1031, Amendment 2, Technical Specifications
SR 3.1.1.2 requires, in part, that the transportable storage canister (
TSC) be backfilled with helium in the range of 0.694-0.802 g/liter prior to transport operations. Contrary to the above, on June 4, 2018, the licensee transported Magnastor cask 45 to the independent spent fuel storage installation pad with the
TSC backfilled to approximately 0.85-0.89 g/liter due to the use of out of tolerance flow meters during backfilling operations. Significance/Severity Level: The inspectors determined that traditional enforcement is applicable for this
NCV as it involved requirements pertaining to
ISFSI operations and therefore the reactor oversight process is not applicable. The
NCV was determined to be a
Severity Level IV violation as it did not involve willfulness, was identified by the licensee, and was determined to be of minimal safety significance as the over fill of helium did not exceed any design parameters of the
TSC during the transport operations.Corrective Action Reference: This issue was entered into the licensees corrective action program as NCR 2211048, Potentially Exceeding Magnastor Helium Density Upper Range.
