GB950946A - Improvements in or relating to period meters for nuclear reactors - Google Patents

Improvements in or relating to period meters for nuclear reactors

Info

Publication number
GB950946A
GB950946A GB35906/60A GB3590660A GB950946A GB 950946 A GB950946 A GB 950946A GB 35906/60 A GB35906/60 A GB 35906/60A GB 3590660 A GB3590660 A GB 3590660A GB 950946 A GB950946 A GB 950946A
Authority
GB
United Kingdom
Prior art keywords
amplifier
output
capacitor
period
differentiating
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.)
Expired
Application number
GB35906/60A
Inventor
Donald Harrison
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.)
UNTIED KINGDOM ATOMIC ENERGY A
UK Atomic Energy Authority
Original Assignee
UNTIED KINGDOM ATOMIC ENERGY A
UK Atomic Energy Authority
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
Priority to NL270376D priority Critical patent/NL270376A/xx
Application filed by UNTIED KINGDOM ATOMIC ENERGY A, UK Atomic Energy Authority filed Critical UNTIED KINGDOM ATOMIC ENERGY A
Priority to GB35906/60A priority patent/GB950946A/en
Priority to DEU8405A priority patent/DE1181334B/en
Publication of GB950946A publication Critical patent/GB950946A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01T—MEASUREMENT OF NUCLEAR OR X-RADIATION
    • G01T1/00—Measuring X-radiation, gamma radiation, corpuscular radiation, or cosmic radiation
    • G01T1/30—Measuring half-life of a radioactive substance
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06G—ANALOGUE COMPUTERS
    • G06G7/00—Devices in which the computing operation is performed by varying electric or magnetic quantities
    • G06G7/12—Arrangements for performing computing operations, e.g. operational amplifiers
    • G06G7/18—Arrangements for performing computing operations, e.g. operational amplifiers for integration or differentiation; for forming integrals
    • G06G7/184—Arrangements for performing computing operations, e.g. operational amplifiers for integration or differentiation; for forming integrals using capacitive elements
    • G06G7/186—Arrangements for performing computing operations, e.g. operational amplifiers for integration or differentiation; for forming integrals using capacitive elements using an operational amplifier comprising a capacitor or a resistor in the feedback loop
    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21C—NUCLEAR REACTORS
    • G21C17/00—Monitoring; Testing ; Maintaining
    • G21C17/14—Period meters
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Mathematical Physics (AREA)
  • General Physics & Mathematics (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Plasma & Fusion (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Molecular Biology (AREA)
  • General Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Software Systems (AREA)
  • Computer Hardware Design (AREA)
  • Health & Medical Sciences (AREA)
  • Amplifiers (AREA)
  • Measurement Of Radiation (AREA)

Abstract

950,946. Period meters. UNITED KINGDOM ATOMIC ENERGY AUTHORITY. Oct. 13, 1961 [Oct.19, 1960], No. 35906/60. Heading G1A. [Also in Division G4] In a nuclear-reactor period meter comprising an ionization chamber 1 followed by a logarithmic amplifier 2 whose output is applied to a differentiating amplifier 3 to give an indication of reactor period on meter M, and in which differentiation in amplifier 3 is effected by means of series input capacitor C 1 and negative feedback resistor R 2 associated with a linear D.C. amplifier 4, the smoothing time-constant of the differentiating amplifier 3, which is provided by means of resistor R1 and capacitor C 2 , is varied in accordance with the output of the logarithmic amplifier 2 by means of a connection therefrom to a voltagesensitive resistance element 5 which determines the extent to which capacitor C 3 modifies the effective value of smoothing capacitor C 2 whereby the smoothing time-constant of the differentiating amplifier 3 is reduced as the output of the logarithmic amplifier 2 increases. In a preferred arrangement, Fig. 2 (not shown), the resistance element 5 is constituted by a pair of silicon diodes so fed in push-pull by the output of amplifier 2 that their resistance falls as the output of the amplifier increases. Specification 906, 068 is referred to.
GB35906/60A 1960-10-19 1960-10-19 Improvements in or relating to period meters for nuclear reactors Expired GB950946A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
NL270376D NL270376A (en) 1960-10-19
GB35906/60A GB950946A (en) 1960-10-19 1960-10-19 Improvements in or relating to period meters for nuclear reactors
DEU8405A DE1181334B (en) 1960-10-19 1961-10-18 Nuclear reactor period meter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB35906/60A GB950946A (en) 1960-10-19 1960-10-19 Improvements in or relating to period meters for nuclear reactors

Publications (1)

Publication Number Publication Date
GB950946A true GB950946A (en) 1964-03-04

Family

ID=10382858

Family Applications (1)

Application Number Title Priority Date Filing Date
GB35906/60A Expired GB950946A (en) 1960-10-19 1960-10-19 Improvements in or relating to period meters for nuclear reactors

Country Status (3)

Country Link
DE (1) DE1181334B (en)
GB (1) GB950946A (en)
NL (1) NL270376A (en)

Also Published As

Publication number Publication date
NL270376A (en)
DE1181334B (en) 1964-11-12

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