DEVELOPMENT OF TEMPERATURE PROTECTIVE CIRCUITS FOR THE HNPF FUEL CHANNEL EXIT

Technical Report · Sun Jan 15 04:00:00 EST 1961

OSTI ID:4088142

Brown, D E; Dunsmore, C L

The HNPF plant protective system includes circuits with the function of precluding unsafe high temperathre and sustained fast changes in fuel-channel coolant-exit temperatures, either in the increasing or decreasing direction. The development of the fuel-channel-exit high temperature and rate change of temperature circuits resulted in a transistorized system of plug-in components of high reliability. The circuits were designed, where possible, for fail-safe operation in case of component malfunction and for ease of maintenance and calibration. In addition to providing shutdown or scram signals, these circuits also provide setback and alarm signals. The setpoints for scram, setback, and alarm are each independently adjustable. These circuits monitor an iron- constantan thermocouple locatod at the outlet of a fuel cluster in the reactor. In the actual protective system, three identical circuits are used in a 1-out-of" 3 coincidence arrangement to enhance the over-all reliability. (auth)

• Research Organization: Atomics International. Div. of North American Aviation, Inc., Canoga Park, Calif.
• DOE Contract Number: AT(11-1)-GEN-8
• NSA Number: NSA-15-011168
• OSTI ID: 4088142
• Report Number(s): NAA-SR-5313(Rev.)
• Country of Publication: United States
• Language: English

Related Subjects

ALARM SYSTEMS
CIRCUITS
COINCIDENCE METHODS
COOLANTS
COPPER ALLOYS
ENGINEERING AND EQUIPMENT
HIGH TEMPERATURE
IRON ALLOYS
MAINTENANCE
MEASURED VALUES
MONITORING
NICKEL ALLOYS
SAFETY
TEMPERATURE
THERMOCOUPLES
TRANSISTORS