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Title: Technical basis for cases N-629 and N-631 as an alternative for RTNDT reference temperature

Abstract

ASME Code Cases N-629/N-631, published in 1999, provided an important new approach to allow material specific, measured fracture toughness curves for ferritic steels in the code applications. This has enabled some of the nuclear power plants whose reactor pressure vessel materials reached a certain threshold level based on overly conservative rules to use an alternative RTNDT to justify continued operation of their plants. These code cases have been approved by the US Nuclear Regulatory Commission and these have been proposed to be codified in Appendix A and Appendix G of the ASME Boiler and Pressure Vessel Code. This paper summarizes the basis of this approach for the record.

Authors:
 [1];  [2]
  1. ORNL
  2. ATI Consulting, Pinehurst, NC
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
Work for Others (WFO); USDOE Office of Nuclear Energy (NE)
OSTI Identifier:
931797
DOE Contract Number:
DE-AC05-00OR22725
Resource Type:
Conference
Resource Relation:
Conference: 2007 ASME Pressure Vessels and Piping Conference, San Antonio, TX, USA, 20070722, 20070726
Country of Publication:
United States
Language:
English
Subject:
21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS; 36 MATERIALS SCIENCE; BOILERS; FERRITIC STEELS; FRACTURE PROPERTIES; NUCLEAR POWER PLANTS; PRESSURE VESSELS

Citation Formats

Merkle, John Graham, and Server, W. L. Technical basis for cases N-629 and N-631 as an alternative for RTNDT reference temperature. United States: N. p., 2007. Web.
Merkle, John Graham, & Server, W. L. Technical basis for cases N-629 and N-631 as an alternative for RTNDT reference temperature. United States.
Merkle, John Graham, and Server, W. L. Mon . "Technical basis for cases N-629 and N-631 as an alternative for RTNDT reference temperature". United States. doi:.
@article{osti_931797,
title = {Technical basis for cases N-629 and N-631 as an alternative for RTNDT reference temperature},
author = {Merkle, John Graham and Server, W. L.},
abstractNote = {ASME Code Cases N-629/N-631, published in 1999, provided an important new approach to allow material specific, measured fracture toughness curves for ferritic steels in the code applications. This has enabled some of the nuclear power plants whose reactor pressure vessel materials reached a certain threshold level based on overly conservative rules to use an alternative RTNDT to justify continued operation of their plants. These code cases have been approved by the US Nuclear Regulatory Commission and these have been proposed to be codified in Appendix A and Appendix G of the ASME Boiler and Pressure Vessel Code. This paper summarizes the basis of this approach for the record.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Mon Jan 01 00:00:00 EST 2007},
month = {Mon Jan 01 00:00:00 EST 2007}
}

Conference:
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