An NRC-identified non-cited violation (
NCV) of Hatch Unit 1
Technical Specification 5.4, Procedures, was identified when procedures did not include inspection criteria for ice buildup of the Unit 1
nitrogen storage tank piping. The licensees failure to establish controls to ensure that ice buildup on the Unit 1 Containment Atmospheric Dilution (
CAD) subsystem piping did not exceed ten inches was a performance deficiency. The licensee entered the condition into their corrective action plan as CR10296584, and performed de-icing activities to remove the ice buildup. This performance deficiency was more than minor, because ice buildup on the
CAD system may
lead to
CAD subsystem inoperability if left uncorrected. The finding screened as Green because the
CAD subsystem remained
operable. The inspectors determined that this finding had a cross-cutting aspect in the Initiation aspect of the problem identification and resolution area, because the licensee did not initiate a condition report upon initially identifying the issue. [P.1]
