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1. (WO1997016832) PASSIVE EMERGENCY HYDROGEN MITIGATION SYSTEM FOR WATER-COOLED NUCLEAR REACTORS
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/1997/016832 International Application No.: PCT/CA1996/000715
Publication Date: 09.05.1997 International Filing Date: 28.10.1996
Chapter 2 Demand Filed: 27.05.1997
IPC:
G21C 9/06 (2006.01) ,G21C 19/317 (2006.01)
G PHYSICS
21
NUCLEAR PHYSICS; NUCLEAR ENGINEERING
C
NUCLEAR REACTORS
9
Emergency protection arrangements structurally associated with the reactor
04
Means for suppressing fires
06
Means for preventing accumulation of explosives gases, e.g. recombiners
G PHYSICS
21
NUCLEAR PHYSICS; NUCLEAR ENGINEERING
C
NUCLEAR REACTORS
19
Arrangements for treating, for handling, or for facilitating the handling of, fuel or other materials which are used within the reactor, e.g. within its pressure vessel
28
Arrangements for introducing fluent material into the reactor core; Arrangements for removing fluent material from the reactor core
30
with continuous purification of circulating fluent material, e.g. by extraction of fission products
317
Recombination devices for radiolytic dissociation products
Applicants:
ATOMIC ENERGY OF CANADA LIMITED [CA/CA]; 344 Slater Street Ottawa, Ontario K1A 0S4, CA
Inventors:
SPINKS, Norman, J.; US
Agent:
AITKEN, David, W.; Osler, Hoskin & Harcourt Suite 1500 50 O'Connor Street Ottawa, Ontario K1P 6L2, CA
Priority Data:
08/550,66231.10.1995US
Title (EN) PASSIVE EMERGENCY HYDROGEN MITIGATION SYSTEM FOR WATER-COOLED NUCLEAR REACTORS
(FR) SYSTEME PASSIF D'ELIMINATION D'URGENCE DE L'HYDROGENE POUR LES REACTEURS NUCLEAIRES REFROIDIS A L'EAU
Abstract:
(EN) An improved system for passively removing hydrogen inside containment in a nuclear reactor in the event of a loss of coolant accident by means of catalytic hydrogen recombination. A baffle wall (26) located inside containment is used to establish within containment an air upflow path and an air downflow path in convective exchange. The air upflow is past the area (22) of the coolant lines and is effective to entrain hydrogen from the break, and the air downflow path is in the area (28) adjacent the containment wall (12). The air upflow path downstream of the coolant lines is ducted so as to confine the entrained hydrogen to the ducted air upflow path, and catalytic hydrogen recombiners are located in the ducted air upflow path for recombining said entrained hydrogen with oxygen in said ducted air upflow.
(FR) La présente invention concerne une amélioration du système passif éliminant recombinaison catalytique l'hydrogène de l'enceinte de confinement d'un réacteur nucléaire en cas perte accidentelle de fluide caloporteur. Un déflecteur (26) à l'intérieur de l'enceinte de confinement y entretient un flux d'air ascendant et un flux d'air descendant entre lesquels s'établit un échange par convection. Au niveau de la zone (22) des tubes de fluide caloporteur, le flux d'air ascendant entraîne l'hydrogène issu de la fissure, le flux d'air redescendant en passant au niveau de la zone (28) voisine de la paroi de confinement (12). En aval des tubes de fluide caloporteur, la circulation du flux d'air ascendant est canalisée de façon à confiner l'hydrogène entraîné vers la circulation d'air ascendant canalisé. Les modules de recombinaison catalytique d'hydrogène disposés dans la circulation d'air ascendant canalisé recombinent avec l'oxygène du flux d'air ascendant canalisé l'hydrogène déjà entraîné.
Designated States: AL, AM, AT, AU, AZ, BB, BG, BR, BY, CA, CH, CN, CZ, DE, DK, EE, ES, FI, GB, GE, HU, IL, IS, JP, KE, KG, KR, KZ, LK, LR, LS, LT, LU, LV, MD, MG, MK, MN, MW, MX, NO, NZ, PL, PT, RO, RU, SD, SE, SG, SI, SK, TJ, TM, TR, TT, UA, UG, UZ, VN
African Regional Intellectual Property Organization (ARIPO) (KE, LS, MW, SD, SZ, UG)
Eurasian Patent Organization (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM)
European Patent Office (AT, BE, CH, DE, DK, ES, FI, FR, GB, GR, IE, IT, LU, MC, NL, PT, SE)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, ML, MR, NE, SN, TD, TG)
Publication Language: English (EN)
Filing Language: English (EN)
Also published as:
EP0858663JP2007121313RU02154314JPH11514447 CN1201550CA2236093
KR1019990067183AU1996072734