NEA-0671 NORCOOL.

NORCOOL, BWR LOCA Analysis with Thermal Non-Equilibrium and Counter Current Flow

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

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1. NAME OR DESIGNATION OF PROGRAM: NORCOOL.

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2. COMPUTERS

To submit a request, click below on the link of the version you wish to order. Rules for end-users are available here.

Program name	Package id	Status	Status date
NORCOOL-I	NEA-0671/02	Tested	14-JAN-1982

Machines used:

Package ID	Orig. computer	Test computer
NEA-0671/02	CDC CYBER 174	CDC CYBER 174

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3. DESCRIPTION OF PROBLEM OR FUNCTION

NORCOOL-I is a model for the behaviour of a BWR under LOCA conditions, and is a result of a joint Nordic cooperation. It contains a simplified, fixed geometry model of a BWR, models for the heat conduction in the fuel rods and the structural materials, and for the two-phase flow.

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4. METHOD OF SOLUTION

The model for the two-phase flow consists of a model for the continuous water region (single phase water and bubbly flow) and a model for the dispersed annular flow region. Each of the models is based on a one-dimensional, separate description of the phases, which allows for thermal non-equilibrium and counter current flow, and a special tracing of the two-phase level between the two regions is performed.

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5. RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM:

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6. TYPICAL RUNNING TIME

NEA-DB executed the test case on CDC CYBER 174 without segmentation in 272 seconds.

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7. UNUSUAL FEATURES OF THE PROGRAM:

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8. RELATED AND AUXILIARY PROGRAMS:

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9. STATUS

Package ID	Status date	Status
NEA-0671/02	14-JAN-1982	Tested at NEADB

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10. REFERENCES:

NEA-0671/02, included references:

- Poul Astrup:
  NORCOOL-I. A Programme for Analysis of BWR Emergency Core Cooling
  by Top Spray and Reflooding. Input Description. NORHAV-D-82 (3/81)
- N. Bech:
  Numerical Methods for the Hydrodinamic Equations used in the
  Reflood Part of NORCOOL-I.  NORHAV-D-63 (March 1978, Rev. 3/1983)
- J.G. Munthe Andersen et al.:
  A Model for Analysis of a BWR under LOCA Conditions Part II.
  Program Description.  NORHAV-D-33  (October 1977)

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11. MACHINE REQUIREMENTS

Main storage (CDC CYBER 174): 275,000 octal words (no segmentation)
257,000 octal words (segmentation).

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12. PROGRAMMING LANGUAGE(S) USED

Package ID	Computer language
NEA-0671/02	FORTRAN-IV

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13. OPERATING SYSTEM UNDER WHICH PROGRAM IS EXECUTED:
NOS Level 501 (CDC CYBER 174).

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14. OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS:

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15. NAME AND ESTABLISHMENT OF AUTHOR

      Risoe National Laboratory
      DK-4000 Roskilde
      Denmark

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16. MATERIAL AVAILABLE

NEA-0671/02

File name	File description	Records
NEA0671_02.002	INFORMATION	54
NEA0671_02.003	NORCOOL-I SOURCE	20756
NEA0671_02.004	NORCOOL-I JCL FOR TEST CASE 1 + SEG. CARDS	52
NEA0671_02.005	NORCOOL-I INPUT FOR TEST CASE 1	188
NEA0671_02.006	NORCOOL-I OUTPUT OF TEST CASE 1	4689
NEA0671_02.007	NORLIN SOURCE (F4,AUX. OF NORCOOL-I)	614
NEA0671_02.008	NORLIN JCL FOR TEST CASE 2	10
NEA0671_02.009	NORLIN INPUT FOR TEST CASE 2	188
NEA0671_02.010	NORLIN OUTPUT OF TEST CASE 2	464
NEA0671_02.011	NORDIM1 SOURCE (F4,AUX. OF NORCOOL-I)	848
NEA0671_02.012	NORDIM1 JCL FOR TEST CASE 3	14
NEA0671_02.013	NORDIM1 INPUT FOR TEST CASE 3	188
NEA0671_02.014	NORDIM1 OUTPUT OF TEST CASE 3	300