NEA-0921 NOTAM.

NOTAM, Neutronics Hydraulics of BWR in Steady-State Conditions

NAME OR DESIGNATION OF PROGRAM, COMPUTER, DESCRIPTION OF PROGRAM 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 AUTHORS, MATERIAL, CATEGORIES

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1. NAME OR DESIGNATION OF PROGRAM: NOTAM.

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2. COMPUTERS

To submit a request, click below on the link of the version you wish to order. Only liaison officers are authorised to submit online requests. Rules for requesters are available here.

Program name	Package id	Status	Status date
NOTAM	NEA-0921/01	Tested	01-MAR-1990

Machines used:

Package ID	Orig. computer	Test computer
NEA-0921/01	BURROUGHS 7800	CRAY X-MP

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3. DESCRIPTION OF PROGRAM OR FUNCTION

A 3-dimensional neutronic- hydraulic code is designed to make calculations on boiling water reactors in static conditions. With its restart facilities it is possible to make core follow-up calculations.

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4. METHOD OF SOLUTION

The neutronic part of the code is based on nodal theory with coupling coefficients, the so-called Trilux-method. In the hydraulic part the equations of conservation are solved 1-dimensionally along the flow path with one moderator channel and up to 50 coolant channels.

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5. RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM

The number of energy groups is restricted to one and a half while the max. number of nodes is 12,000. Coupling coefficients must be obtained from other codes or by experience.

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6. TYPICAL RUNNING TIME

Running time for sample problem NOTAM/INPUT/S is 60 seconds, e.g. problem NOTAM/INPUT/B 300 seconds.

NEA-0921/01

The test cases included in this package has been run by NEADB on a CRAY-XMP/2800 computer. CPU execution times were 300.5 seconds for 5 steps of the big problem; and 33 seconds for 20 steps of the small problem.

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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-0921/01	01-MAR-1990	Tested at NEADB

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10. REFERENCES:

NEA-0921/01, included references:

- E. Danielsen and B.F. Schougaard:
A Short Description of the Programme - NOTAM
Risoe-I-299 (May 1987)

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11. MACHINE REQUIREMENTS

NEA0921/01: Minimum job size on CRAY-XMP/2800 is 660,000 words.

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12. PROGRAMMING LANGUAGE(S) USED

Package ID	Computer language
NEA-0921/01	FORTRAN-77

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13. OPERATING SYSTEM UNDER WHICH PROGRAM IS EXECUTED: MCP (release 36.6).

NEA-0921/01

COS 1.17 with FORTRAN-77 compiler CFT 1.14 (CRAY-XMP).

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14. OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS:

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15. NAME AND ESTABLISHMENT OF AUTHORS

          E. Danielsen
          Riso National Laboratory
          Department of Energy Technology
          RISO, Denmark

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16. MATERIAL AVAILABLE

NEA-0921/01

File name	File description	Records
NEA0921_01.001	Information file	55
NEA0921_01.002	JCL and control information	16
NEA0921_01.003	NOTAM FORTRAN 77 source	4273
NEA0921_01.004	Big input sample problem	788
NEA0921_01.005	Small input sample problem	675
NEA0921_01.006	Library data file	10392
NEA0921_01.007	Output from big sample problem	2479
NEA0921_01.008	Output from small sample problem	3203

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17. CATEGORIES

G. Radiological Safety, Hazard and Accident Analysis

Keywords: 1-group, BWR reactors, burnup, hydraulics, steady-state conditions, voids.