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4533514 Nuclear reactor degassing method and degassing system
Ann. nucl. Energy. Vol. 13~ p p V VI, 1986 Pergamon Press Ltd. Printed in Great Britain
NEW PATENTS This Section contains abstracts and, where appropriate, illustrations of recently issued United States patents and published patent applications filed from over 30 countries under the Patent Cooperation Treaty. This information was obtained from recent additions to the Pergamon PATSEARCH ~ online database in accordance with interest profiles developed by the Editors. Further information about Pergamon PATSEARCH" can be obtained from Pergamon InfoLine Inc., 1340 Old Chain Bridge Road, McLean, Virginia 22101 U.S.A. Copies of complete patents announced in this Section are available from Pergamon InfoLine Inc. for $8 per copy• Payment with order is required. Orders outside North America add $2 for air postage. Order by patent number for Pergamon lnfoLine only.
4532104 TRANSPORT AND STORAGE FLASK FOR NUCLEAR FUEL
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Sydney Wearden, John A Gatley, Bold, United Kingdom assigned to British Nuclear Fuels Limited
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A flask for the transport and storage of irradiated nuclear fuel comprises a hollow cylindrical container having cooling fins surrounded by a jacket of neutron shielding material. The jacket can be formed in two semi-cylindrical portions which are hinged together and held tight about the container• The jacket is spaced radially from the extremities of the cooling fins.
The invention is directed to a concrete shielding housing for receiving and storing a transportable fuel element container which is suitable for storage and filled with spent nuclear reactor fuel elements. The clear interior dimensions of the concrete shielding housing are somewhat larger than the outer dimensions of the container. During its temporary storage the fuel element container must be monitored with suitable measuring instruments. In order to make the monitoring as simple as possible, measuring probes are arranged on the inner wall surface of the shielding wall of the concrete shielding housing. The measuring probes are embedded in the concrete and are already in place and ready for use before the fuel element container is loaded into the concrete shielding housing.
4532428 CONCRETE SHIELDING HOUSING FOR RECEIVING AND STORING A NUCLEAR FUEL ELEMENT CONTAINER Hans-Peter Dyck, Harry Spilker, Heinz-Diete Gregor, Burgdorf, Federal Republic Of Germany assigned to Deutsche Gesellschaft fur Wiederaufarbeitung yon Kernbrennstoffen mbH
4533514 NUCLEAR REACTOR DEGASSING METHOD AND DEGASSING SYSTEM Michiyosh Yamamoto, Katsumi Ohsumi, Shinji Mitani, Yoshie Takashima, Hiroo Igarashi, Hitachi, Japan assigned to Hitachi Ltd; Hitachi Engineering Co Ltd
New Patents
VI
spraying operation is not cooled by the heat exchanger in said residual heat removal system.
4534140
~
ANNULAR SLAB FOR CLOSING THE VESSEL OF A FAST NEUTRON NUCLEAR REACTOR
/ / / / / i i /
Claude Malaval, Antony, France assigned to Novatome Control rods are inserted into the core of a nuclear reactor in operation to shut down the reactor output. Before completion of entire control rod insertion, a high-temperature coolant flowing in piping for a reactor water clean-up system is sprayed into the space in the upper portion of the reactor vessel. As the space is under negative pressure, oxygen existing in the water droplets of the sprayed coolant is separated. After completion of entire control rod insertion, a residual heat removal system is operated. The spraying operation is discontinued and a lowtemperature coolant cooled by a heat exchanger in the residual heat removal system is sprayed into said space. The coolant sprayed by said first
24
2B
2O
55
[7 4L,o Annular slab for closing the vessel of a fast nuclear reactor, comprising at least one downwardly divergent frusto-conical sleeve coaxial with the inner and outer sleeves delimiting the slab, dividing the slab envelope into upper and lower parts respectively filled with concrete incorporating metal reinforcements and with concrete for radiation protection.
For information about P A T S E A R C H ~
Pergamon InfoLine Inc. 1340 Old Chain Bridge Road McLean, Virginia 22101 USA Telephone (703) 442-0900 Telex: 90-1811
Pergamon lnfoLine Limited 12 Van@ Street London EC2A 2DE England Telephone (01) 377-4650 Telex: 8814614
Pergamon Press Canada Ltd 150 Consumers Road, Suite 104 Willowdale, Ontario Canada M2J IP9 Telephone (416) 497-8337
NEW PATENTS This Section contains abstracts and, where appropriate, illustrations of recently issued United States patents and published patent applications filed from over 30 countries under the Patent Cooperation Treaty. This information was obtained from recent additions to the Pergamon PATSEARCH ~ online database in accordance with interest profiles developed by the Editors. Further information about Pergamon PATSEARCH" can be obtained from Pergamon InfoLine Inc., 1340 Old Chain Bridge Road, McLean, Virginia 22101 U.S.A. Copies of complete patents announced in this Section are available from Pergamon InfoLine Inc. for $8 per copy• Payment with order is required. Orders outside North America add $2 for air postage. Order by patent number for Pergamon lnfoLine only.
4532104 TRANSPORT AND STORAGE FLASK FOR NUCLEAR FUEL
[- ........ 1
~',
Sydney Wearden, John A Gatley, Bold, United Kingdom assigned to British Nuclear Fuels Limited
(
'/
L
F -IQ r
A flask for the transport and storage of irradiated nuclear fuel comprises a hollow cylindrical container having cooling fins surrounded by a jacket of neutron shielding material. The jacket can be formed in two semi-cylindrical portions which are hinged together and held tight about the container• The jacket is spaced radially from the extremities of the cooling fins.
The invention is directed to a concrete shielding housing for receiving and storing a transportable fuel element container which is suitable for storage and filled with spent nuclear reactor fuel elements. The clear interior dimensions of the concrete shielding housing are somewhat larger than the outer dimensions of the container. During its temporary storage the fuel element container must be monitored with suitable measuring instruments. In order to make the monitoring as simple as possible, measuring probes are arranged on the inner wall surface of the shielding wall of the concrete shielding housing. The measuring probes are embedded in the concrete and are already in place and ready for use before the fuel element container is loaded into the concrete shielding housing.
4532428 CONCRETE SHIELDING HOUSING FOR RECEIVING AND STORING A NUCLEAR FUEL ELEMENT CONTAINER Hans-Peter Dyck, Harry Spilker, Heinz-Diete Gregor, Burgdorf, Federal Republic Of Germany assigned to Deutsche Gesellschaft fur Wiederaufarbeitung yon Kernbrennstoffen mbH
4533514 NUCLEAR REACTOR DEGASSING METHOD AND DEGASSING SYSTEM Michiyosh Yamamoto, Katsumi Ohsumi, Shinji Mitani, Yoshie Takashima, Hiroo Igarashi, Hitachi, Japan assigned to Hitachi Ltd; Hitachi Engineering Co Ltd
New Patents
VI
spraying operation is not cooled by the heat exchanger in said residual heat removal system.
4534140
~
ANNULAR SLAB FOR CLOSING THE VESSEL OF A FAST NEUTRON NUCLEAR REACTOR
/ / / / / i i /
Claude Malaval, Antony, France assigned to Novatome Control rods are inserted into the core of a nuclear reactor in operation to shut down the reactor output. Before completion of entire control rod insertion, a high-temperature coolant flowing in piping for a reactor water clean-up system is sprayed into the space in the upper portion of the reactor vessel. As the space is under negative pressure, oxygen existing in the water droplets of the sprayed coolant is separated. After completion of entire control rod insertion, a residual heat removal system is operated. The spraying operation is discontinued and a lowtemperature coolant cooled by a heat exchanger in the residual heat removal system is sprayed into said space. The coolant sprayed by said first
24
2B
2O
55
[7 4L,o Annular slab for closing the vessel of a fast nuclear reactor, comprising at least one downwardly divergent frusto-conical sleeve coaxial with the inner and outer sleeves delimiting the slab, dividing the slab envelope into upper and lower parts respectively filled with concrete incorporating metal reinforcements and with concrete for radiation protection.
For information about P A T S E A R C H ~
Pergamon InfoLine Inc. 1340 Old Chain Bridge Road McLean, Virginia 22101 USA Telephone (703) 442-0900 Telex: 90-1811
Pergamon lnfoLine Limited 12 Van@ Street London EC2A 2DE England Telephone (01) 377-4650 Telex: 8814614
Pergamon Press Canada Ltd 150 Consumers Road, Suite 104 Willowdale, Ontario Canada M2J IP9 Telephone (416) 497-8337