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Title: Cavity closure arrangement for high pressure vessels

A closure arrangement for a pressure vessel such as the pressure vessel of a high temperature gas-cooled reactor wherein a liner is disposed within a cavity penetration in the reactor vessel and defines an access opening therein. A closure is adapted for sealing relation with an annular mounting flange formed on the penetration liner and has a plurality of radially movable locking blocks thereon having outer serrations adapted for releasable interlocking engagement with serrations formed internally of the upper end of the penetration liner so as to effect high strength closure hold-down. In one embodiment, ramping surfaces are formed on the locking block serrations to bias the closure into sealed relation with the mounting flange when the locking blocks are actuated to locking positions.
  1. (San Diego, CA)
Publication Date:
OSTI Identifier:
Report Number(s):
US 4303177
DOE Contract Number:
Resource Type:
Research Org:
Country of Publication:
United States
cavity; closure; arrangement; pressure; vessels; closure; arrangement; pressure; vessel; pressure; vessel; temperature; gas-cooled; reactor; liner; disposed; cavity; penetration; reactor; vessel; defines; access; therein; closure; adapted; sealing; relation; annular; mounting; flange; formed; penetration; liner; plurality; radially; movable; locking; blocks; thereon; outer; serrations; adapted; releasable; interlocking; engagement; serrations; formed; internally; upper; penetration; liner; effect; strength; closure; hold-down; embodiment; ramping; surfaces; formed; locking; block; serrations; bias; closure; sealed; relation; mounting; flange; locking; blocks; actuated; locking; positions; gas-cooled reactor; temperature gas-cooled; temperature gas; reactor vessel; pressure vessel; pressure vessel; pressure vessel; pressure vessels; sealing relation; sealed relation; closure arrangement; closure arrangement; cooled reactor /220/292/376/976/