GB996458A - Improvements in the hygrometric measurement of the uranium hexafluoride content of gases - Google Patents

Improvements in the hygrometric measurement of the uranium hexafluoride content of gases

Info

Publication number
GB996458A
GB996458A GB2977562A GB2977562A GB996458A GB 996458 A GB996458 A GB 996458A GB 2977562 A GB2977562 A GB 2977562A GB 2977562 A GB2977562 A GB 2977562A GB 996458 A GB996458 A GB 996458A
Authority
GB
United Kingdom
Prior art keywords
gas
content
mirror
dew
head
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
GB2977562A
Inventor
Bijay Saha
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 GB996458A publication Critical patent/GB996458A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N25/00—Investigating or analyzing materials by the use of thermal means
    • G01N25/14—Investigating or analyzing materials by the use of thermal means by using distillation, extraction, sublimation, condensation, freezing, or crystallisation
    • G01N25/142—Investigating or analyzing materials by the use of thermal means by using distillation, extraction, sublimation, condensation, freezing, or crystallisation by condensation
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N25/00—Investigating or analyzing materials by the use of thermal means
    • G01N25/02—Investigating or analyzing materials by the use of thermal means by investigating changes of state or changes of phase; by investigating sintering
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N25/00—Investigating or analyzing materials by the use of thermal means
    • G01N25/56—Investigating or analyzing materials by the use of thermal means by investigating moisture content
    • G01N25/66—Investigating or analyzing materials by the use of thermal means by investigating moisture content by investigating dew-point
    • G01N25/68—Investigating or analyzing materials by the use of thermal means by investigating moisture content by investigating dew-point by varying the temperature of a condensing surface

Abstract

996, 458. Hygrometric determination of the vapour content of gases. COMMISSARIAT A L'ENERGIE ATOMIQUE. Aug. 2, 1962 [Aug. 3, 1961], No. 29775/62. Headings G1B and G1S. A process for measuring the UF 6 content of a permanent gas by means of a dew-point hygrometer 1 comprises passivating the apparatus by the introduction of C1F 3 or F 2 thereinto and subsequently analysing the UF 6 containing gas in the presence of C1F 3 or F 2 . The measuring head 10 of the hygrometer 1 is totally enclosed and has an inlet 8 and outlet 9 for the gas to be analysed. The head 10 has a gold mirror 2, illuminated by a lamp 11, and a photo-electric cell 13. The mirror is coded by a gas entering at 3 and passing through an electromagnetically operated valve 4, needle valve 5 and heat exchanger 6, the cooling gas leaving at 7. A thermocouple 12 is located behind the mirror 2 and the temperature of the mirror is noted by a recorder 16. The output of the cell 13 is connected to an electronically controlled relay 14 fed from a mains supply 15, the relay 14 receiving signals from the photo-electric cell 13 and controlling the valve 4. The passivation of the apparatus allows formation of a protective fluoride layer and prevents decomposition of the UF 6 , and the introduction of the C1F 3 or F 2 , preferably to give a content two to ten times that of UF 6 in the gas to be analysed, allows continuous regeneration of any UF 6 which may decompose in the head 10 and allows the dew-point measurements to be made continuously on a stream of gas e.g. from stuffing boxes or traps in a uranium enrichment plant. The UF 6 content of the gas can be found from the saturated vapour pressure of UF 6 at the dew-point using an empirical formula.
GB2977562A 1961-08-03 1962-08-02 Improvements in the hygrometric measurement of the uranium hexafluoride content of gases Expired GB996458A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR869928A FR1305487A (en) 1961-08-03 1961-08-03 Continuous measurement of uranium hexafluoride content in non-condensable gases

Publications (1)

Publication Number Publication Date
GB996458A true GB996458A (en) 1965-06-30

Family

ID=8760666

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2977562A Expired GB996458A (en) 1961-08-03 1962-08-02 Improvements in the hygrometric measurement of the uranium hexafluoride content of gases

Country Status (4)

Country Link
BE (1) BE620720A (en)
FR (1) FR1305487A (en)
GB (1) GB996458A (en)
LU (1) LU42116A1 (en)

Also Published As

Publication number Publication date
BE620720A (en)
FR1305487A (en) 1962-10-05
LU42116A1 (en) 1962-09-24

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