NEA-0431 SCEPTIC.

SCEPTIC, Pressure Drop, Flow Rate, Heat Transfer, Temperature in Reactor Heat Exchanger

NAME OR DESIGNATION OF PROGRAM, COMPUTER, NATURE OF PHYSICAL PROBLEM SOLVED, METHOD OF SOLUTION, RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM, TYPICAL RUNNING TIME, FEATURES, RELATED AND AUXILIARY PROGRAMS, STATUS, REFERENCES, MACHINE REQUIREMENTS, LANGUAGE, OPERATING SYSTEM OR MONITOR UNDER WHICH PROGRAM IS EXECUTED, OTHER RESTRICTIONS, NAME AND ESTABLISHMENT OF AUTHOR, MATERIAL, CATEGORIES

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1. NAME OR DESIGNATION OF PROGRAM: SCEPTIC.

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2. COMPUTERS

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Program name	Package id	Status	Status date
SCEPTIC	NEA-0431/01	Tested	01-DEC-1975

Machines used:

Package ID	Orig. computer	Test computer
NEA-0431/01	IBM 370 series	IBM 370 series

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3. NATURE OF PHYSICAL PROBLEM SOLVED

SCEPTIC is a program for calculating pressure drop, flow rates, heat transfer rates, and temperature in heat exchangers such as fuel elements of typical gas or liquid cooled nuclear reactors. The effects of turbulent and heat interchange between flow passages are considered.

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4. METHOD OF SOLUTION

The computation procedure amounts to a nodal of lumped parameter type of calculation. The axial mesh size is automatically selected to assure that a prescribed accuracy of results is obtained.

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5. RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM

Maximum number of subchannels is 25, maximum number of heated surfaces is 46.

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6. TYPICAL RUNNING TIME

42 seconds for a sample problem with 9 subchannels on CDC CYBER 72.

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7. UNUSUAL FEATURES: UNUSUAL FEATURES OF THE PROGRAM

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8. RELATED AND AUXILIARY PROGRAMS: SCEPTIC is an extended version of HECTIC-2.

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9. STATUS

Package ID	Status date	Status
NEA-0431/01	01-DEC-1975	Tested at NEADB

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10. REFERENCES

NEA-0431/01, included references:

- N. Kattchee, W.C. Reynolds:
  'HECTIC-II, an IBM 7090 FORTRAN Computer Program for Heat Transfer
  Analysis of Gas or Liquid Cooled Reactor Passages.'
  IDO-28595 - TID-4500. Contract AT(10-1)-880 (Decmber 1962).
- R.A. Cushman:
  'Modifications to HECTIC-II.'
  AE-RTV-561, (February 1966).
- S.O. Eriksson:
  'SCEPTIC - A FORTRAN IV Computer Program for Temperature Analysis
  of Gas or Liquid Cooled Flow Passages with Heated Smooth or
  Roughened Surfaces - A User's Guide.'
  EIR-TM-IN-479 (July 1971).

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11. MACHINE REQUIREMENTS: 75000 octal words on CDC CYBER 72.

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12. PROGRAMMING LANGUAGE(S) USED

Package ID	Computer language
NEA-0431/01	FORTRAN-IV

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13. OPERATING SYSTEM OR MONITOR UNDER WHICH PROGRAM IS EXECUTED: SCOPE 3.2 (CDC 6600). KRONOS (CYBER 72). IBM 370/OS.

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14. OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS

ANY OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS

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15. NAME AND ESTABLISHMENT OF AUTHOR

    N. Kattchee and W.C. Reynolds
    Aerojet General Corporation
    San Ramon, California
    U.S.A.

    S-O Eriksson
    AB Atomenergi
    Nykoeping, Sweden.

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16. MATERIAL AVAILABLE

NEA-0431/01