US3325372A - Neutron source formed as a fast pulsed reactor - Google Patents

Neutron source formed as a fast pulsed reactor Download PDF

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Publication number
US3325372A
US3325372A US381638A US38163864A US3325372A US 3325372 A US3325372 A US 3325372A US 381638 A US381638 A US 381638A US 38163864 A US38163864 A US 38163864A US 3325372 A US3325372 A US 3325372A
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US
United States
Prior art keywords
pulse
window
screen
reactivity
excess
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Expired - Lifetime
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US381638A
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English (en)
Inventor
Kistner Gustav
Misenta Rolf
Raievski Victor
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European Atomic Energy Community Euratom
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European Atomic Energy Community Euratom
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Publication date
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Publication of US3325372A publication Critical patent/US3325372A/en
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    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21C—NUCLEAR REACTORS
    • G21C1/00—Reactor types
    • G21C1/30—Subcritical reactors ; Experimental reactors other than swimming-pool reactors or zero-energy reactors
    • Y—GENERAL 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E30/00—Energy generation of nuclear origin
    • Y02E30/30—Nuclear fission reactors

Definitions

  • the present invention relates to a pulsed neutron source in a reflector, formed as a fast reactor with two neutron outlet windows through the reflector and with screens movable in front of the windows, the screens being made of reactivity increasing materials.
  • This construction already suggested by others, is constructionally and operationally more advantageous than the known Russian system IBR-DUBNA which is for the same purpose but for substantially smaller outputs.
  • the pulsing of the reactivity takes place in two steps. In a first step one screen pulses the reactor at its window in the vicinity of the critical point (pre-pulse) and in a second step the other screen pulses the reactor at its window above the prompt critical point (excess pulse).
  • the screen for the excess pulse thus determines the duration of the reactivity impulse and the screen for the pre-pulse determines the frequency of the neutron impulse. It is aimed to make the impulse duration as small as possible.
  • the same advantageous result in regard to the neutron impulse duration is obtained in reactors with two windows by providing as a window for the excess pulses at least one individual slot which is narrow in relation to the window for the pre-pulse. If the window is replaced by a line of progressively or decreasingly spaced staggered slots and the related screen is correspondingly provided with zones of the same surface of reactivity increasing materials, there is obtained a sufficient reactivity lift and decoupling between the lift width and the impulse width.
  • FIG. 1 is an arrangement with a window and a single slot and Patented June 13, 196i
  • FIG. 2 is an arrangement with a window and a line of slots.
  • reference numeral 10 indicates the reactor core, 11 the window, and 12 the slot according to the invention.
  • the screens 13 and 14 with axes of rotation 15 and 16 move on circular tracks (not shown) in front of the window and slot.
  • Screen 14 is arranged with its length in the direction of movement with respect to the width of the slot. To provide the required reactivity lift it is preferable to make the screen 14 of fissionable material.
  • reference numeral 20 indicates the reactor core
  • 21 the window for the prepulse
  • 22 the slot line for the excess pulses
  • 23 and 24 indicate the screens.
  • the screen 24 is provided with reactivity material only at the Zones 25 corresponding to the slot line 22.
  • the two-window reactor has the advantage over the single window reactor that each of the screens operates as close as possible to the window and can be made thinner.
  • a fast reactor used as a pulsed neutron source wherein the reactor core is located in a reflector, said reflector provided with two neutron out-let windows and with a pre-pulse screen and an excess-pulse screen having synchronized movements and movable in front of the said windows, respectively, said screens composed of reactivity increasing material for pulsing the reactivity, means to operate the pre-pulse screen to bring the reactivity up to the vicinity of the critical point and means to simultaneously operate the excess-pulse screen to bring the reactivity at the other window above the prompt critical point; the improvement wherein the window for the excess-pulse screen is made up of at least one slot which is narrow in relation to the window for the pre-pulse screen.
  • said excess-pulse window is formed by several aligned slots spaced unequidistantly and the excess-pulse screen is provided with zones of reactivity increasing material, the spacing of said zones being such as to correspond to the spacing of the aligned slots of said excess-pulse window.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • General Engineering & Computer Science (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Particle Accelerators (AREA)
  • Structure Of Emergency Protection For Nuclear Reactors (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)
US381638A 1963-08-15 1964-07-10 Neutron source formed as a fast pulsed reactor Expired - Lifetime US3325372A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEE25343A DE1184872B (de) 1963-08-15 1963-08-15 Als schneller Reaktor ausgebildete, gepulste Neutronenquelle

Publications (1)

Publication Number Publication Date
US3325372A true US3325372A (en) 1967-06-13

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ID=7071657

Family Applications (1)

Application Number Title Priority Date Filing Date
US381638A Expired - Lifetime US3325372A (en) 1963-08-15 1964-07-10 Neutron source formed as a fast pulsed reactor

Country Status (8)

Country Link
US (1) US3325372A (de)
BE (1) BE649071A (de)
CH (1) CH423010A (de)
DE (1) DE1184872B (de)
FR (1) FR1514078A (de)
GB (1) GB1071442A (de)
LU (1) LU46332A1 (de)
NL (1) NL6409388A (de)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1234333B (de) 1964-02-13 1967-02-16 Euratom Pulsierungseinrichtung fuer eine als schneller Reaktor ausgebildete gepulste Neutronenquelle
DE1223962B (de) * 1965-02-15 1966-09-01 Euratom Sicherheitsverbindung fuer Pulsationsscheiben in Anlagen zum Pulsen der Reaktivitaet eines Versuchs-Kernreaktors
RU2157005C2 (ru) * 1997-11-19 2000-09-27 Ирдынчеев Люммир Ананьевич Способ получения энергии из дейтерия и его продуктов при совмещении реакций деления и синтеза
EP1024501A4 (de) * 1998-08-13 2001-08-29 Otkrytoe Aktsionernoe Obschest Verfahren zur durchführung einen kernspaltungskettenreaktion mit resonanzneutronen

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2790761A (en) * 1952-05-16 1957-04-30 Leo A Ohlinger Neutronic reactor

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT224768B (de) * 1960-11-25 1962-12-10 Bbc Brown Boveri & Cie Vorrichtung zur Erzeugung kurzzeitiger Neutronenimpulse

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2790761A (en) * 1952-05-16 1957-04-30 Leo A Ohlinger Neutronic reactor

Also Published As

Publication number Publication date
NL6409388A (de) 1965-02-16
GB1071442A (en) 1967-06-07
DE1184872B (de) 1965-01-07
LU46332A1 (de) 1972-01-01
FR1514078A (fr) 1968-02-23
BE649071A (de) 1964-12-10
CH423010A (de) 1966-10-31

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