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Title: DISSIMILAR WELDS FOR THE APT SUPERCONDUCTING CAVITY'S CRYOGENIC PLUMBING SYSTEM

Abstract

No abstract prepared.

Authors:
; ;
Publication Date:
Research Org.:
Los Alamos National Lab., Los Alamos, NM (US)
Sponsoring Org.:
US Department of Energy (US)
OSTI Identifier:
787310
Report Number(s):
LA-UR-99-5856
TRN: US0200033
DOE Contract Number:
W-7405-ENG-36
Resource Type:
Conference
Resource Relation:
Conference: Conference title not supplied, Conference location not supplied, Conference dates not supplied; Other Information: PBD: 1 Nov 1999
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; 07 ISOTOPES AND RADIATION SOURCES; CRYOGENIC FLUIDS; PIPES; WELDED JOINTS; SUPERCONDUCTING CAVITY RESONATORS; ACCELERATORS; TRITIUM; ISOTOPE PRODUCTION

Citation Formats

M. J. COLA, D. F. TETER, and ET AL. DISSIMILAR WELDS FOR THE APT SUPERCONDUCTING CAVITY'S CRYOGENIC PLUMBING SYSTEM. United States: N. p., 1999. Web.
M. J. COLA, D. F. TETER, & ET AL. DISSIMILAR WELDS FOR THE APT SUPERCONDUCTING CAVITY'S CRYOGENIC PLUMBING SYSTEM. United States.
M. J. COLA, D. F. TETER, and ET AL. 1999. "DISSIMILAR WELDS FOR THE APT SUPERCONDUCTING CAVITY'S CRYOGENIC PLUMBING SYSTEM". United States. doi:. https://www.osti.gov/servlets/purl/787310.
@article{osti_787310,
title = {DISSIMILAR WELDS FOR THE APT SUPERCONDUCTING CAVITY'S CRYOGENIC PLUMBING SYSTEM},
author = {M. J. COLA and D. F. TETER and ET AL},
abstractNote = {No abstract prepared.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = 1999,
month =
}

Conference:
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  • Failure of dissimilar metal welds (DMW) in superheater and reheater sections is a major cause of forced outage of boilers. Research and development has been in progress at several organizations throughout the world including a major project, RP 1874, sponsored by EPRI. As a result of these efforts the causes of DMW failures are now better known than before. Several viable remedies have been identified. The effects of plant operational variables on damage to the DMWs have been quantified. Methods for assessing the condition of DMWs in the field have been developed. A seminar was organized for the purpose ofmore » reviewing and consolidating all the information available relating to failure causes and remedies for the DMW failure problems. The proceedings from the seminar are presented in this report. The papers have been entered individually into EDB and ERA. (LTN)« less
  • This paper addresses dissimilar metal weld examinations at PWRS. Surveys were conducted to document the dissimilar metal weld configurations at PWR plants and to update the information known about dissimilar metal weld configurations at BWR plants. The experiences which BWR utilities have had with dissimilar metal weld examinations are documented and include: correct identification of IGSCC, indications thought to be IGSCC but were actually fabrication flaws, and difficulties encountered with the examination of dissimilar metal welds after stress improvement. An experimental program was conducted which verified that the longitudinal wave procedures developed for BWRs are also applicable to PWR designs.
  • In high temperature applications, dissimilar welds made with nickel-base alloy filler metals provide extended service lives as compared to similar welds made with stainless steel filler metals. Although considerable refinery experience exists, it is difficult to find published information for pressure boundary welds made with nickel-base filler metal in hot hydrogen and/or H{sub 2}S services. The Amuay Refinery has used nickel base alloy filler metals to join clad piping components in a number of piping applications. This paper details the results of an analysis of clad 1{1/4}Cr-{1/2} Mo steel hydroprocessing reactor effluent piping samples removed from service to assess themore » long term effects of hydrogen and H{sub 2}S on the dissimilar weld. Results of mechanical testing and metallurgical analysis reveal that no significant loss in properties occurred. Details of the weld procedures and weld joint design are provided.« less
  • The more than 20 presentations at this international seminar identified root causes of dissimilar weld failures and suggested solutions to the problem. In addition, they documented industry in-service inspection and repair practices.
  • No abstract prepared.