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1. (WO1990015417) PERMANENT REFUELING POOL SEAL
Latest bibliographic data on file with the International Bureau   

Pub. No.: WO/1990/015417 International Application No.: PCT/US1990/002086
Publication Date: 13.12.1990 International Filing Date: 16.04.1990
Chapter 2 Demand Filed: 04.12.1990
IPC:
G21C 13/028 (2006.01)
G PHYSICS
21
NUCLEAR PHYSICS; NUCLEAR ENGINEERING
C
NUCLEAR REACTORS
13
Pressure vessels; Containment vessels; Containment in general
02
Details
028
Seals, e.g. for pressure vessels or containment vessels
Applicants: COMBUSTION ENGINEERING, INC.[US/US]; 1000 Prospect Hill Road Windsor, CT 06095, US
Inventors: McDONALD, Michael, Shawn; US
ROEBELEN, George, Joseph; US
BROOKINS, Robert, Harry; US
SIEGEL, Edward, Arnold; US
SCHUKEI, Glenn, Elwin; US
AYRES, David, John; US
Agent: MULHOLLAND, John, H. ; ABB Combustion Engineering Nuclear Power Combustion Engineering, Inc. 1000 Prospect Hill Road Windsor, CT 06095, US
Priority Data:
363,73209.06.1989US
Title (EN) PERMANENT REFUELING POOL SEAL
(FR) SYSTEME D'ETANCHEITE PERMANENT POUR PISCINE DE RECHARGEMENT
Abstract:
(EN) A permanent pool seal and neutron shield (30) for providing an effective water barrier over the annular space (28) between a nuclear reactor vessel flange (24) and a surrounding annular ledge (22) includes annular deck sections (32) supported on spaced ribs (46). Flexible membranes (50, 52) on the deck section peripheries accommodate relative movement. Openings (42), each with a removable plug structure which includes cover (44) and tapered can (60), provide vessel cavity (14) with ventilation and maintenance access. All cans (60) and similar containers (56 and 59) under the deck structure and flange (24) contain a shielding material (58) in the form of a boron-containing concrete. Supported below the cans is refractory insulating material (54).
(FR) Un système permanent d'étanchéité et de bouclier neutronique pour piscine (30) assure une barrière d'eau efficace au-dessus de l'espace annulaire (28) entre un rebord de cuve de réacteur nucléaire (24) et une plate-forme annulaire circonvoisine (22), et comporte des sections annulaires de tablier (32) supportées sur des nervures espacées (46). Des membranes souples (50, 52) sur les périphéries de section de tablier permettent un mouvement relatif. Des ouvertures (42), chacune pourvue d'une structure d'obturation amovible qui comprend un couvercle (44) et une gaine conique (60), assurent la ventilation de la cavité de réacteur (14) et l'accès pour la maintenance. Toutes les gaines (60) et des récipients similaires (56 et 59) situés sous la structure de tablier et le rebord (24) contiennent un matériau de blindage (58) sous forme de béton renfermant du bore. Un matériau isolant réfractaire (54) est supporté au-dessous des gaines.
Designated States: FI, KR
European Patent Office (EPO) (AT, BE, CH, DE, DK, ES, FR, GB, IT, LU, NL, SE)
Publication Language: English (EN)
Filing Language: English (EN)