JPS646892A - Core internal structure of nuclear reactor - Google Patents

Core internal structure of nuclear reactor

Info

Publication number
JPS646892A
JPS646892A JP62162676A JP16267687A JPS646892A JP S646892 A JPS646892 A JP S646892A JP 62162676 A JP62162676 A JP 62162676A JP 16267687 A JP16267687 A JP 16267687A JP S646892 A JPS646892 A JP S646892A
Authority
JP
Japan
Prior art keywords
during
pipe
shut
piping
reactivity during
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP62162676A
Other languages
Japanese (ja)
Inventor
Yasuhiro Masuhara
Osamu Yokomizo
Takaaki Mochida
Shinichi Kashiwai
Akio Tomiyama
Shunji Nakao
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP62162676A priority Critical patent/JPS646892A/en
Publication of JPS646892A publication Critical patent/JPS646892A/en
Pending legal-status Critical Current

Links

Classifications

    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E30/00Energy generation of nuclear origin
    • Y02E30/30Nuclear fission reactors

Landscapes

  • Monitoring And Testing Of Nuclear Reactors (AREA)

Abstract

PURPOSE:To increase burnup and to improve fuel economy by decreasing a difference in reactivity during the operation and shut-down of a nuclear reactor and increasing the reactivity during the operation. CONSTITUTION:The top end of a neutron moderating pipe 6 filled internally with an inert gas is closed and a communicating hole 4 for opening the bottom part is provided thereto. An internal piping 7 running through the top end and bottom end of the neutron moderating pipe is provided and a moderator is passed in this piping 7. Fins 8 for steam condensation are provided in the upper part. Double pipes or an internal pipe provided with a spray part in the upper part which is not the through-piping 7 is equally satisfactory. The inert gas is thereby compressed by cooling water and the neutron is moderated over the entire length of the fuel rod during the normal operation. The average density in the pipe is decreased during the shut-down of the reactor. The difference in the reactivity during the shut-down and the operation is thereby eliminated and, therefore, the uranium to water ratio during the operation is increased and the reactivity during the operation is improved; in addition, there are no moving parts and, therefore, the reliability is enhanced.
JP62162676A 1987-06-30 1987-06-30 Core internal structure of nuclear reactor Pending JPS646892A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62162676A JPS646892A (en) 1987-06-30 1987-06-30 Core internal structure of nuclear reactor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62162676A JPS646892A (en) 1987-06-30 1987-06-30 Core internal structure of nuclear reactor

Publications (1)

Publication Number Publication Date
JPS646892A true JPS646892A (en) 1989-01-11

Family

ID=15759173

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62162676A Pending JPS646892A (en) 1987-06-30 1987-06-30 Core internal structure of nuclear reactor

Country Status (1)

Country Link
JP (1) JPS646892A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010151573A (en) * 2008-12-25 2010-07-08 Global Nuclear Fuel-Japan Co Ltd Fuel assembly and boiling water reactor
JP2015500993A (en) * 2011-12-06 2015-01-08 テラパワー, エルエルシー Reactivity control device and control method in nuclear fission reactor, nuclear fission reactor, and method for manufacturing reactivity control device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010151573A (en) * 2008-12-25 2010-07-08 Global Nuclear Fuel-Japan Co Ltd Fuel assembly and boiling water reactor
JP2015500993A (en) * 2011-12-06 2015-01-08 テラパワー, エルエルシー Reactivity control device and control method in nuclear fission reactor, nuclear fission reactor, and method for manufacturing reactivity control device

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