NESC9580 RICKI.

1. NAME OR DESIGNATION OF PROGRAM:  RICKI.

3. DESCRIPTION OF PROGRAM OR FUNCTION

RICKI is an interactive program for analysis of gamma spectra containing one or more peaks with possible multiplets. Algorithms are incorporated for peak fitting, analysis, and nuclide identification. Comprehensive output keeps the user informed of the analysis as it proceeds and presents the results. User-selectable options for plotting and neutron activation analysis are available to control this analysis. RICKI was developed to analyze spectra from examinations of severe fuel damage specimens. Two features included to streamline the analysis of Three Mile Island (TMI) core bore data are the edit of averaged activities and the output file created for generating a spreadsheet. Activity editing allows the user to select which gamma lines are used for a specific nuclide in average activity calculations. Contributions from peak areas which result from overlapping lines of two or more nuclides may be removed. For each averaged activity an edited activity file record is written containing the nuclide name, averaged activity, activity standard deviation, scan start position, and scan end position.

4. METHOD OF SOLUTION

The peak search algorithm utilizes an optimized second derivative filter for efficient and reliable determination of peak location. A linear Gaussian fitting technique, which is a modified version of Mukoyama's linear least squares fitting method in which the centroid, sigma, and peak height are free parameters, is used to calculate peak areas. An estimated background is computed for each peak using Gunnink's method. Nuclide activities are computed by matching centroids with nuclide library entries and averaging the activity calculated for each matching peak.

5. RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM

Maxima of -
     500 gamma library entries
      80 peaks/spectrum

6. TYPICAL RUNNING TIME:  Running time varies from 20 seconds to 5
minutes.

7. UNUSUAL FEATURES OF THE PROGRAM:

8. RELATED AND AUXILIARY PROGRAMS

RICKI was developed from CINA, a simpler fitting and peak integration program. The CINA gamma line library and menu sections are retained in RICKI. Auxiliary programs  GAMLIB, EFFCAL, and SPECMOD provide gamma library maintenance, detector efficiency table generation, and spectrum error correction, respectively. Auxiliary program CORESORT converts TMI core bore scan data to the format of a listing of activity versus scan position for each nuclide and produces a spreadsheet input file (nuclide activity listed by scan position) readable by LOTUS 1-2-3.
RICKI is not intended to replace large-scale gamma analysis codes such as GAUSS8, GAMANAL (NESC 9654), or SAMPO, but provides rapid, accurate analysis for cases where detailed peak shapes and other parameters may not be known.

10. REFERENCES:

- A.E. Proctor:
  An Implementation of the Pulse Injection Technique for Dead-Time
  and Pile-up Corrections in Gamma Spectroscopy Suitable for
  Automated Systems
  EG&G Idaho (October 1986)
- M. Birgersson:
  RICKI Flexible Disk Cartridge Description and Implementation
  Information
  NESC Note 88-27 (December 31, 1987)
- A.E. Proctor:
  RICKI: A Compact Gamma Analysis Code for the IBM Personal Computer
  EGG-PHY-7545 (February 1987)
- A.E. Proctor:
  RICKI: A Compact Gamma Analysis Code for the IBM Personal Computer
  Addendum to EGG-PHY-7545

11. MACHINE REQUIREMENTS

An IBM PC, preferably equipped with math coprocessor and an enhanced graphics adapter, a minimum of two floppy disk drives, and an EPSON FX-286 or compatible printer for graphics printing. A hard disk is desirable to obtain reasonable nuclide sorting time.

Main storage requirements on an IBM PC/AT are as follows: RICKI and RICKI2: 175K; GAMLIB: 75K; EFFCAL: 95K; SPECMOD: 90K; CORESORT: 50K.

13. OPERATING SYSTEM UNDER WHICH PROGRAM IS EXECUTED:  DOS 3.1.

The program ran under MSDOS version 3.30. The compiler  Microsoft QuickBASIC version 4.00 and linker Microsoft Linker 3.63.08 were used.

14. OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS

Because some DOS systems do not allow more than three open files, two RICKI  source files are provided. RICKI2 edits the averaged activities and  procedures output file (the fourth open file) for use by the CORESORT spreadsheet generation program. RICKI, which does not perform this editing, opens only three files.

15. NAME AND ESTABLISHMENT OF AUTHORS: , A.E. Proctor, EG&G Idaho, Inc.

File name	File description	Records
NESC9580_01.001	Information file	133
NESC9580_01.002	Spectral data file	848
NESC9580_01.003	Spectral data file	848
NESC9580_01.004	Calibration efficiency table	21
NESC9580_01.005	Calibration library	0
NESC9580_01.006	Core efficiency table	11
NESC9580_01.007	CORESORT BASIC source	401
NESC9580_01.008	CORESORT executable file	0
NESC9580_01.009	EFFCAL BASIC source	884
NESC9580_01.010	EFFCAL executable file	0
NESC9580_01.011	EFFCAL compilation listing	1038
NESC9580_01.012	EFFCAL load map	25
NESC9580_01.013	GAMLIB BASIC source	705
NESC9580_01.014	GAMLIB executable file	0
NESC9580_01.015	GAMLIB compilation listing	811
NESC9580_01.016	GAMLIB load map	25
NESC9580_01.017	Gamma library spectrum calculation file 1	0
NESC9580_01.018	Gamma library spectrum calculation file 2	9
NESC9580_01.019	Test efficiency table for rods	20
NESC9580_01.020	RICKI BASIC source	2297
NESC9580_01.021	RICKI executable file	0
NESC9580_01.022	RICKI load map	25
NESC9580_01.023	RICKI2 BASIC source	2364
NESC9580_01.024	RICKI2 executable module	0
NESC9580_01.025	Rod efficiency table with Ce/Eu strip stand.	20
NESC9580_01.026	SPECMOD BASIC source	918
NESC9580_01.027	SPECMOD executable file	0
NESC9580_01.028	SPECMOD compilating listing	1075
NESC9580_01.029	SPECMOD load map	25
NESC9580_01.030	Efficiency table	1
NESC9580_01.031	Demonstration efficiency table	7
NESC9580_01.032	Test parameter file	19
NESC9580_01.033	Thorium library	0
NESC9580_01.034	TMI peak identification library	0
NESC9580_01.035	File containing parameters for spect. analy.	19
NESC9580_01.036	DOS file-names	36