Spectral analysis of some fission neutron sources with the SOHO code from BONNER sphere data
Description
For several tests fission neutron sources particularly 252Cf bare and D2O moderated, we present some spectral analysis results obtained with the new iterative code SOHO from BONNER spheres data. The approximative solutions are obtained upon discretization of the Fredholm Equation of the first kind whose Resolution Function is experimentally known and mathematically defined by the Log-Normal Hypothesis given in our previous reports CEA-N--2241 (1981) and CEA-R--5181 (1982). The iterative procedure solve systems of non-exact homogeneous linear equations QX = e (by optimum liquidation of the residuals esub(i) with positivity constraint and absolute convergence, leading to an appropriate physical solution with a relative error in our tests typically of the order of a fraction of one percent for the INPUT - OUTPUT Data. For the applications to Health Physics the SOHO Code has been programmed for use with a HP-41 CV calculator
Availability note (English)
MF available from INIS under the Report Number.Abstract (French)
Pour plusieurs sources neutroniques tests de fission, particulierement 252Cf nue et moderes sous D2O, nous presentons quelques resultats d'analyse spectrale obtenus avec le nouveau code iteratif SOHO a partir des donnees des spheres de BONNER. Les solutions approchees sont obtenues apres discretisation de l'equation integrale de Fredholm de premiere espece dont la Fonction de Resolution est experimentalement connue et mathematiquement definie par l'Hypothese Log-Normale donnee dans nos precedents rapports CEA-N--2241 (1981) et CEA-R--5181 (1982). La procedure iterative resoud des systemes d'equations lineaires homogenes non exacte QX = e (par la liquidation optimale des residus esub(i) avec une condition imposee de positivite et une convergence absolue, conduisant a une solution physiquement appropriee et une erreur relative pour les tests typiquement de l'ordre d'une fraction du pourcent entre les donnees d'entree et de sortie. Pour les applications a la Radioprotection, le Code SOHO a ete programme pour son utilisation avec un calculateur HP-41 CVFiles
17038297.pdf
Files
(788.5 kB)
| Name | Size | Download all |
|---|---|---|
|
md5:12889e28efa1fbfc325d15cf256c9d38
|
788.5 kB | Preview Download |
Additional details
Additional titles
- Original title (French)
- Analyse spectrale de quelques sources neutroniques de fission avec le code ''SOHO'' et les spheres de BONNER
Publishing Information
- Imprint Pagination
- 52 p.
- Report number
- CEA-N--2425
INIS
- Country of Publication
- France
- Country of Input or Organization
- France
- INIS RN
- 17038297
- Subject category
- S73: NUCLEAR PHYSICS AND RADIATION PHYSICS;
- Resource subtype / Literary indicator
- Numerical Data
- Descriptors DEI
- BONNER SPHERE SPECTROMETERS; CALIFORNIUM 252; EVALUATED DATA; FISSION NEUTRONS; FREDHOLM EQUATION; HPRR REACTOR; NEUTRON DOSIMETRY; NEUTRON SOURCES; NEUTRON SPECTRA; S CODES
- Descriptors DEC
- ACTINIDE NUCLEI; AIR COOLED REACTORS; ALPHA DECAY RADIOISOTOPES; BARYONS; CALIFORNIUM ISOTOPES; COMPUTER CODES; DATA; DOSIMETRY; ELEMENTARY PARTICLES; ENRICHED URANIUM REACTORS; EPITHERMAL REACTORS; EQUATIONS; EVEN-EVEN NUCLEI; FAST REACTORS; FERMIONS; GAS COOLED REACTORS; HADRONS; HEAVY NUCLEI; INFORMATION; INTEGRAL EQUATIONS; ISOTOPES; MEASURING INSTRUMENTS; NEUTRON SPECTROMETERS; NEUTRONS; NUCLEI; NUCLEONS; NUMERICAL DATA; PARTICLE SOURCES; PULSED REACTORS; RADIATION SOURCES; RADIOISOTOPES; REACTORS; RESEARCH AND TEST REACTORS; RESEARCH REACTORS; SPECTRA; SPECTROMETERS; YEARS LIVING RADIOISOTOPES