This document describes the hazards and operability (HAZOP) analysis performed for the activities associated with the storage of Spent Nuclear Fuel (SNF) sludge at the T Plant. The safety authorization basis for the T Plant for SNF sludge storage is defined as those aspects of facility design and operational requirements relied upon by DOE to authorize operations. The safety authorization basis for the current T Plant activities is described in HNF-SD-W-ISB-006, Rev 2, Interim Safety Basisfor Solid Waste Facilities (T Plant) (ISB) and associated amendments and engineering change notices. In addition the authorization basis includes other document as summarized in Section 1.3.