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Title: Weld Repair of a Stamped Pressure Vessel in a Radiologically Controlled Zone

In September 2012 an ASME B&PVC Section VIII stamped pressure vessel located at the DOE Hanford Site Effluent Treatment Facility (ETF) developed a through-wall leak. The vessel, a steam/brine heat exchanger, operated in a radiologically controlled zone (by the CH2MHill PRC or CHPRC), had been in service for approximately 17 years. The heat exchanger is part of a single train evaporator process and its failure caused the entire system to be shut down, significantly impacting facility operations. This paper describes the activities associated with failure characterization, technical decision making/planning for repair by welding, logistical challenges associated with performing work in a radiologically controlled zone, performing the repair, and administrative considerations related to ASME code requirements.
Authors:
 [1] ;  [2] ;  [3]
  1. Fluor Enterprises, Inc.
  2. CH2MHill Plateau Remediation Company
  3. Fluor Government Group
Publication Date:
OSTI Identifier:
1092549
Report Number(s):
HNF-55802-FP Rev 0
DOE Contract Number:
DE-AC06-08RL14788
Resource Type:
Conference
Resource Relation:
Conference: Nuclear Power International (NPI) Conference 2013 11/11/2013 Orlando, FL
Research Org:
HNF (Hanford Site (HNF), Richland, WA (United States))
Sponsoring Org:
USDOE Office of Environmental Management (EM)
Country of Publication:
United States
Language:
English
Subject:
12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES; 42 ENGINEERING