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Title: Machining Test Specimens from Harvested Zion RPV Segments for Through Wall Attenuation Studies

Abstract

The decommissioning of the Zion Units 1 and 2 Nuclear Generating Station (NGS) in Zion, Illinois presents a special opportunity for developing a better understanding of materials degradation and other issues associated with extending the lifetime of existing Nuclear Power Plants (NPPs) beyond 60 years of service. In support of extended service and current operations of the US nuclear reactor fleet, the Oak Ridge National Laboratory (ORNL), through the Department of Energy (DOE), Light Water Reactor Sustainability (LWRS) Program, is coordinating and contracting with Zion Solutions, LLC, a subsidiary of Energy Solutions, the selective procurement of materials, structures, and components from the decommissioned reactors. In this paper, we will discuss the acquisition of segments of the Zion Unit 2 Reactor Pressure Vessel (RPV), the cutting of these segments into sections and blocks from the beltline and upper vertical welds and plate material, the current status of machining those blocks into mechanical (Charpy, compact tension, and tensile) test specimens and coupons for chemical and microstructural (TEM, APT, SANS, and nano indention) characterization, as well as the current test plans and possible collaborative projects. Access to service-irradiated RPV welds and plate sections will allow through wall attenuation studies to be performed, whichmore » will be used to assess current radiation damage models (Rosseel et al. (2012) and Rosseel et al. (2015)).« less

Authors:
 [1];  [1];  [1]
  1. ORNL
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1214500
DOE Contract Number:
DE-AC05-00OR22725
Resource Type:
Conference
Resource Relation:
Conference: SMiRT 23, Manchester, United Kingdom, 20150809, 20150814
Country of Publication:
United States
Language:
English
Subject:
Reactor Pressure Vessel; Attenuation; transition temperature shift

Citation Formats

Rosseel, Thomas M, Sokolov, Mikhail A, and Nanstad, Randy K. Machining Test Specimens from Harvested Zion RPV Segments for Through Wall Attenuation Studies. United States: N. p., 2015. Web.
Rosseel, Thomas M, Sokolov, Mikhail A, & Nanstad, Randy K. Machining Test Specimens from Harvested Zion RPV Segments for Through Wall Attenuation Studies. United States.
Rosseel, Thomas M, Sokolov, Mikhail A, and Nanstad, Randy K. Thu . "Machining Test Specimens from Harvested Zion RPV Segments for Through Wall Attenuation Studies". United States. doi:.
@article{osti_1214500,
title = {Machining Test Specimens from Harvested Zion RPV Segments for Through Wall Attenuation Studies},
author = {Rosseel, Thomas M and Sokolov, Mikhail A and Nanstad, Randy K},
abstractNote = {The decommissioning of the Zion Units 1 and 2 Nuclear Generating Station (NGS) in Zion, Illinois presents a special opportunity for developing a better understanding of materials degradation and other issues associated with extending the lifetime of existing Nuclear Power Plants (NPPs) beyond 60 years of service. In support of extended service and current operations of the US nuclear reactor fleet, the Oak Ridge National Laboratory (ORNL), through the Department of Energy (DOE), Light Water Reactor Sustainability (LWRS) Program, is coordinating and contracting with Zion Solutions, LLC, a subsidiary of Energy Solutions, the selective procurement of materials, structures, and components from the decommissioned reactors. In this paper, we will discuss the acquisition of segments of the Zion Unit 2 Reactor Pressure Vessel (RPV), the cutting of these segments into sections and blocks from the beltline and upper vertical welds and plate material, the current status of machining those blocks into mechanical (Charpy, compact tension, and tensile) test specimens and coupons for chemical and microstructural (TEM, APT, SANS, and nano indention) characterization, as well as the current test plans and possible collaborative projects. Access to service-irradiated RPV welds and plate sections will allow through wall attenuation studies to be performed, which will be used to assess current radiation damage models (Rosseel et al. (2012) and Rosseel et al. (2015)).},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Thu Jan 01 00:00:00 EST 2015},
month = {Thu Jan 01 00:00:00 EST 2015}
}

Conference:
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