June 2016

Targeted Assessment of the Waste Treatment and Immobilization Plant High-Level Waste Facility Radioactive Liquid Waste Disposal System Safety Basis Change Package

The Office of Nuclear Safety and Environmental Assessments, within the U.S. Department of Energy's (DOE) independent Office of Enterprise Assessments (EA), conducted an assessment of the Hanford Site Waste Treatment and Immobilization Plant (WTP) preliminary documented safety analysis (PDSA) change package for the redesign of the High-Level Waste Facility radioactive liquid waste disposal system.  This assessment is part of a broader EA assessment to evaluate the multi-year Bechtel National, Inc. (BNI) activities associated with upgrading the High-Level Waste Facility PDSA.  The High-Level Waste Facility is a hazard category 2 nuclear facility designed to vitrify high-level waste received from the Pretreatment Facility and is an integral part of WTP.  BNI is designing and constructing the High-Level Waste Facility under the direction and oversight of the DOE Office of River Protection (ORP).