Electric heater for nuclear fuel rod simulators
Creators
Description
The present invention is directed to an electric cartridge-type heater for use as a simulator for a nuclear fuel pin in reactor studies. The heater comprises an elongated cylindrical housing containing a longitudinally extending helically wound heating element with the heating element radially inwardly separated from the housing. Crushed cold-pressed preforms of boron nitride electrically insulate the heating element from the housing while providing good thermal conductivity. Crushed cold-pressed preforms of magnesia or a magnesia-15 percent boron nitride mixture are disposed in the cavity of the helical heating element. The coefficient of thermal expansion of the magnesia or the magnesia-boron nitride mixture is higher than that of the boron nitride disposed about the heating element for urging the boron nitride radially outwardly against the housing during elevated temperatures to assure adequate thermal contact between the housing and the boron nitride
Availability note (English)
U.S. Commissioner of Patents, Washington, D.C. 20231, USA, $.50.Additional details
Additional titles
- Augmented title (English)
- Patent
Publishing Information
- Imprint Pagination
- v p.
- IPC:
- Int. Cl.H05B 3/44.
- IPC
- Int. Cl.H05B 3/44.
- Patent number
- US patent document 4,326,122/A/
INIS
- Country of Publication
- United States
- Country of Input or Organization
- United States
- INIS RN
- 14729074
- Subject category
- S21: SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS;
- Resource subtype / Literary indicator
- Non-conventional Literature
- Descriptors DEI
- BORON NITRIDES; DIELECTRIC MATERIALS; FUEL RODS; HEATERS; HELICAL CONFIGURATION; MAGNESIUM COMPOUNDS; PARTICLES; SIMULATORS; STAINLESS STEELS; TESTING; THERMAL CONDUCTIVITY; ZIRCALOY
- Descriptors DEC
- ALKALINE EARTH METAL COMPOUNDS; ALLOYS; ANALOG SYSTEMS; BORON COMPOUNDS; CARBON ADDITIONS; CHROMIUM ALLOYS; CONFIGURATION; CORROSION RESISTANT ALLOYS; FUEL ELEMENTS; FUNCTIONAL MODELS; IRON ALLOYS; IRON BASE ALLOYS; MATERIALS; NITRIDES; NITROGEN COMPOUNDS; PHYSICAL PROPERTIES; REACTOR COMPONENTS; STEELS; THERMODYNAMIC PROPERTIES; TIN ALLOYS; TRANSITION ELEMENT ALLOYS; ZIRCONIUM ALLOYS; ZIRCONIUM BASE ALLOYS
Optional Information
- Notes
- PAT-APPL-168977.