US4459045A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gamma thermometer with zircaloy barrier
Assignee: Scandpower Inc
•
Filing: 1981-01-29
•
Granted: 1984-07-10
•
Expires: 2001-01-29
Abstract
Abstract Zircaloy metal is utilized to form the heat generating core and internal lining of a high strength pressure barrier for a gamma thermometer. The internal lining which is cross-sectionally smaller than the core, forms a hydrogen gas barrier to prevent deterioration of the low thermal conductivity of the thermal resistance region in the thermometer.
Inventors
- 👤 Robert D. Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:44
CPC Classifications
G; G01; G01T; G01T1/00; G01T1/02; G01T1/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
119 words
A gamma thermometer assembly for a high pressure environment comprising: (a) at least one gamma thermometer, including a gamma radiation absorbing body of cylindrical shape interrupted at axially spaced measurement zones by reduced diameter sections forming thermal resistance gaps, including a multiple junction thermocouple cable mounted within a central bore in said body to supply differential temperature signals reflecting the local heat flow rates at said measurement zones; (b) a pressure barrier of Iconel of sufficient thickness to provide structural strength encompassing said gamma thermometers; and (c) a hydrogen barrier of zircaloy of sufficent thickness to block the passage of hydrogen said hydrogen barrier between said pressure barrier and said gamma thermometer, said hydrogen barrier encompassing said gamma thermometer.
Claim 2
Dependent Claim
119 words
A gamma thermometer assembly for a high pressure environment comprising: (a) at least one gamma thermometer, including a gamma radiation absorbing body of cylindrical shape interrupted at axially spaced measurement zones by reduced diameter sections forming thermal resistance gaps, including a multiple junction thermocouple cable mounted within a central bore in said body to supply differential temperature signals reflecting the local heat flow rates at said measurement zones; (b) a pressure barrier of Iconel of sufficient thickness to provide structural strength encompassing said gamma thermometers; and (c) a hydrogen barrier of zircaloy of sufficent thickness to block the passage of hydrogen said hydrogen barrier between said pressure barrier and said gamma thermometer, said hydrogen barrier encompassing said gamma thermometer.
References Cited (Backward Citations)
US3067604A
Cited
US3077539A
Cited
US3539400A
Cited
US3627633A
Cited
US3411987A
Cited
US3560282A
Cited
US3923552A
Cited
US4298430A
Cited
US4136553A
Cited
FR2420827A1
Cited
DE3022059A1
Cited
US4313792A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-07-10 | 1988-01-09 | 1988-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-07-10 | 1992-01-09 | 1992-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-07-10 | 1996-01-09 | 1996-07-10 | $7700.00 | Window Closed / Lapsed |