skip to main content

Title: Structure interaction due to thermal bowing of shrouds in steam generator of gas-cooled reactor

The design of the gas-cooled reactor steam generators includes a tube bundle support plate system which restrains and supports the helical tubes in the steam generator. The support system consists of an array of radially oriented, perforated plates through which the helical tube coils are wound. These support plates have tabs on their edges which fit into vertical slots in the inner and outer shrouds. When the helical tube bundle and support plates are installed in the steam generator, they most likely cannot fit evenly between the inner and outer shrouds. This imperfection leads to different gaps between two extreme sides of the tube bundle and the shrouds. With different gaps through the tube bundle height, the helium flow experiences different cooling effects from the tube bundle. Hence, the temperature distribution in the shrouds will be non-uniform circumferentially since their surrounding helium flow temperatures are varied. These non-uniform temperatures in the shrouds result in the phenomenon of thermal bowing of shrouds.
Authors:
Publication Date:
OSTI Identifier:
6348455
Report Number(s):
UCRL-85617; CONF-810801-46
TRN: 81-012079
DOE Contract Number:
W-7405-ENG-48
Resource Type:
Conference
Resource Relation:
Conference: 6. international conference on structural mechanics in reactor technology, Paris, France, 17 Aug 1981
Research Org:
Lawrence Livermore National Lab., CA (USA)
Country of Publication:
United States
Language:
English
Subject:
21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS; HTGR TYPE REACTORS; STEAM GENERATORS; SUPPORTS; DEFORMATION; TEMPERATURE DISTRIBUTION; THERMAL STRESSES; BOILERS; GAS COOLED REACTORS; GRAPHITE MODERATED REACTORS; MECHANICAL STRUCTURES; REACTORS; STRESSES; VAPOR GENERATORS 210300* -- Power Reactors, Nonbreeding, Graphite Moderated