SUMMARY This document is the program plan for the Effluent Treatment Facility (ETF) dangerous waste tank system integrity management. Corrosion rates and remaining life of the process equipment is estimated to support a planned replacement strategy that minimizes plant shutdowns. The data inputs for managing plant integrity include: Flowsheet chemistry Concentrations of stainless steel corrosion threats (process – chemistry and temperature) are assessed for both historic and future operating campaigns. Laboratory testing The corrosion chemistry is simulated with laboratory work to – estimate general corrosion rates and susceptibility to pitting or cracking. Integrity inspections Data from ultrasonic testing, visual inspections, and leak – checks are documented to assess past and current status of vessel integrity. ETF integrity program The inspection frequency and protocol for future – inspections are established in the context of prior findings and anticipated corrosion rates. Independent Qualified Registered Professional Engineer (IQRPE) assessments – Results from prior IQRPE reviews are referenced and summarized. Relevant integrity inspection data is provided or referenced for the next IQRPE assessment in fiscal year (FY) 2019. This integrity program plan provides an engineering approach to monitor corrosion rates on an ongoing basis and an evolving estimate of the remaining useful life for each process vessel in ETF. Preliminary estimates indicate that the Secondary Waste Receiving Tank B and Second Reverse Osmosis Feed Tank will likely require repair/replacement prior to the completion of the ETF mission. Replacement strategies and materials of construction are identified to support continued operation and future support of the Hanford Waste Treatment and Immobilization Plant. Figure ES-1. Integrity Activities
This document is the program plan for the Effluent Treatment Facility (ETF) dangerous waste tank system integrity management. Corrosion rates and remaining life of the process equipment is estimated to support a planned replacement strategy that minimizes plant shutdowns. The data inputs for managing plant integrity include: Flowsheet chemistry – Concentrations of stainless steel corrosion threats (process chemistry and temperature) are assessed for both historic and future operating campaigns. Laboratory testing – The corrosion chemistry is simulated with laboratory work to estimate general corrosion rates and susceptibility to pitting or cracking. Integrity inspections – Data from ultrasonic testing, visual inspections, and leak checks are documented to assess past and current status of vessel integrity. ETF integrity program – The inspection frequency and protocol for future inspections are established in the context of prior findings and anticipated corrosion rates. Independent Qualified Registered Professional Engineer (IQRPE) assessments – Results from prior IQRPE reviews are referenced and summarized. Relevant integrity inspection data is provided or referenced for the next IQRPE assessment in fiscal year (FY) 2019. This integrity program plan provides an engineering approach to monitor corrosion rates on an ongoing basis and an evolving estimate of the remaining useful life for each process vessel in ETF. Preliminary estimates indicate that the Secondary Waste Receiving Tank B and Second Reverse Osmosis Feed Tank will likely require repair/replacement prior to the completion of the ETF mission. Replacement strategies and materials of construction are identified to support continued operation and future support of the Hanford Waste Treatment and Immobilization Plant. Figure ES-1. Integrity Activities SUMMARY
314321_-_DRAFT_RPP-PLAN-61349_Draft.docx