10 CFR 72.150 requires that each licensee shall prescribe activities affecting quality by documented instructions, procedures, or drawings of a type appropriate to the circumstances and shall require that these instructions, procedures, and drawings be followed. Holtec HI-STORM Certificate of Compliance 72-1014 Amendment 5, Final Safety Analysis Report for the HI-STORM 100 Cask System, Revision 7, Section 2.1.9.1.2, specifies the required
helium backfill pressure range for loaded canisters. Contrary to the above,
PSEG selected the incorrect
helium backfill pressure range table in Attachment 9 of SC.MD-FR.DCS-0006(Q), Sealing, Drying, and Backfilling of a loaded multi-purpose canister (
MPC) for two
MPCs, one on June 20, 2016, and the other on June 25, 2016. The NRC inspectors evaluated this violation as having very low safety significance because a thermal analysis performed by Holtec determined the resulting
fuel cladding temperatures and the cask/MPC component temperatures would not exceed the applicable design limits for normal long-term storage with the current
helium pressure. In accordance with the
NRC Enforcement Policy Section 2.2, Part 72, Independent Spent Fuel Storage Installation inspection findings follow the traditional enforcement process and are not dispositioned through the reactor oversight process or the
significance determination process. The violation was determined to be a
Severity Level IV violation of the NRC requirements. The licensee entered the issue into their
CAP as NOTF 20735208. This
Severity Level IV violation was treated as a
NCV, consistent with Section 2.3.2.a of the
NRC Enforcement Policy. CAs for this issue included the Holtec thermal analysis and a revision of the
MPC loading procedure SC.MD-FR.DCS-0006, Sealing, Drying, and Backfilling of a Loaded
MPC.
