GB1374168A - Source-holders and their manufacture - Google Patents

Source-holders and their manufacture

Info

Publication number
GB1374168A
GB1374168A GB2830872A GB2830872A GB1374168A GB 1374168 A GB1374168 A GB 1374168A GB 2830872 A GB2830872 A GB 2830872A GB 2830872 A GB2830872 A GB 2830872A GB 1374168 A GB1374168 A GB 1374168A
Authority
GB
United Kingdom
Prior art keywords
source
holders
brazing
membrane
cover
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
GB2830872A
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.)
Commissariat a lEnergie Atomique et aux Energies Alternatives CEA
Original Assignee
Commissariat a lEnergie Atomique CEA
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 Commissariat a lEnergie Atomique CEA filed Critical Commissariat a lEnergie Atomique CEA
Publication of GB1374168A publication Critical patent/GB1374168A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21G—CONVERSION OF CHEMICAL ELEMENTS; RADIOACTIVE SOURCES
    • G21G4/00—Radioactive sources
    • G21G4/04—Radioactive sources other than neutron sources
    • G21G4/06—Radioactive sources other than neutron sources characterised by constructional features

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)

Abstract

1374168 Brazing OOMMISSZRIAT A L' ENERGIE ATOMIQUE 16 June 1972 [18 June 1971] 28308/72 Heading B3R [Also in Divisions B4 and G1] A radioactive source-holder, e.g. an alphasource-holder, comprises a cover 11, a body 13 and a membrane 15, all of stainless steel, the membrane 15 which has a thickness of approx. 6 microns extending across aligned openings 17, 19 in the cover 11 and the body 13, respectively, the latter having annular lips 21, 23, respectively, between which the membrane 15 is clamped, the membrane 15 being brazed to portions of the cover 11 and the body 13 situated outwardly of the lips. Fusible packings 29, 31 consisting for example, of rings cut out of a sheet of eutectic alloy of 72% Ag and 28% Cu (mp. 779‹ C.) are placed before brazing in annular grooves 25, 27 in the cover 11 and the body 13, respectively. Some ten source-holders 9 are then stacked together with intermediate and end spacer units 39, 41 and 43, which serve to increase the thermal inertia of the membranes and prevent adjacent source-holders from fusing together, between the checkplates 35, 37 of a clamp formed of a material, e.g. molybdenum, having a coefficient of thermal expansion lower than that of the source-holders. Brazing is carried out under a vacuum of 10<SP>-4</SP> Pascal with a rate of rise and fall of temperature of 15‹ C./ minute and a brazing stage of 15 mins., the complete thermal brazing cycle being from 4 to 5 hours. Finally, the external diameter of the source-holders is machined to the line 33, and the source-holders are then checked forgastightness under helium test in a device such as that of Fig. 8 (not shown).
GB2830872A 1971-06-18 1972-06-16 Source-holders and their manufacture Expired GB1374168A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7122300A FR2147784B1 (en) 1971-06-18 1971-06-18

Publications (1)

Publication Number Publication Date
GB1374168A true GB1374168A (en) 1974-11-20

Family

ID=9078915

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2830872A Expired GB1374168A (en) 1971-06-18 1972-06-16 Source-holders and their manufacture

Country Status (4)

Country Link
BE (1) BE784651A (en)
FR (1) FR2147784B1 (en)
GB (1) GB1374168A (en)
IT (1) IT959317B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2139407A (en) * 1981-02-07 1984-11-07 Wiederaufarbeitung Von Kernbre Device for closing a storage container for radioactive materials
CN106482451A (en) * 2016-09-23 2017-03-08 广东核电合营有限公司 The vacuum drying of spentnuclear fuel storage and helium charging unit

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2139407A (en) * 1981-02-07 1984-11-07 Wiederaufarbeitung Von Kernbre Device for closing a storage container for radioactive materials
US4638134A (en) * 1981-02-07 1987-01-20 Deutsche Gesellschaft Device for evacuating, filling and closing final storage containers for radioactive materials
CN106482451A (en) * 2016-09-23 2017-03-08 广东核电合营有限公司 The vacuum drying of spentnuclear fuel storage and helium charging unit
CN106482451B (en) * 2016-09-23 2022-05-27 广东核电合营有限公司 Vacuum drying and helium filling device for spent fuel storage and transportation container

Also Published As

Publication number Publication date
IT959317B (en) 1973-11-10
BE784651A (en) 1972-10-02
FR2147784B1 (en) 1974-06-21
FR2147784A1 (en) 1973-03-11

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees