ANITA-2007 is a code package for the activation characterisation of materials exposed to neutrons in fusion machines. The main component of the package is the activation code ANITA-4U that computes the radioactive inventory of a material exposed to neutron irradiation, continuous or stepwise. It provides activity, atomic density, decay heat, biological hazard, clearance index and gamma-ray source spectra at shut down and at different cooling times. Main improvements with respect to the previous release of the activation code package (the ANITA-2000) are: the possibility to choose among updated neutron activation data libraries, the evaluation of the decay gamma source in the Vitamin-J 42- energy group structure and the introduction of updated clearance levels data (derived from the IAEA Safety Guide, No. RS-G-1.7). Different 175-group neutron activation libraries (based on FENDL/A-2.0, EAF-2003, and EAF-2005.1 neutron activation cross section data) are included in ANITA-2007 code package. The decay, hazard and clearance data library includes decay data based on the FENDL/D-2.0, hazard data based on the ICRP-72 committed effective dose equivalent from inhalation and ingestion (in Sv/Bq) of radio-nuclides and two sets of clearance levels data (the first set contains the “unconditional clearance levels”, based on IAEA-TECDOC-855 and the second one contains the updated values based on IAEA Safety Guide, No. RS-G-1.7). The gamma library (in the 42- Vitamin-J energy group structure) is based on the FENDL/D-2.0 evaluated decay data file. Up to 2000 irradiation time intervals can be considered and a different neutron loading can be used for each irradiation time interval. The updated code package ANITA-2007 has been tested by running sample problems and comparing the results with those obtained with ANITA-2000 and with EASY-2005 code packages. No differences between ANITA-2007 and ANITA-2000 activation parameters calculations and discrepancies within 1% between ANITA-2007 and EASY-2005.1 results have been found. The ANITA-2007 code package version running on a PC (Windows 98, 2000,XP) is actually distributed by ENEA. A CD-Rom containing the executable file ANITA-4U, all the necessary data libraries, the how-to-use manual and few test-case problems will be made available, after ENEA approval, upon request to: Dr. Tonio Pinna, ENEA FUS/TEC - Fusion Technology, Safety & Environment Section, Via Enrico Fermi 45, I-00044, Frascati (Rome), Italy. Email: pinna@frascati.enea.it.
G. Cambi, D.G. Cepraga, M. Frisoni (2007). ANITA-2007 Activation code package: main features and validation. FRASCATI (ROMA) : ENEA.
ANITA-2007 Activation code package: main features and validation
CAMBI, GILIO;
2007
Abstract
ANITA-2007 is a code package for the activation characterisation of materials exposed to neutrons in fusion machines. The main component of the package is the activation code ANITA-4U that computes the radioactive inventory of a material exposed to neutron irradiation, continuous or stepwise. It provides activity, atomic density, decay heat, biological hazard, clearance index and gamma-ray source spectra at shut down and at different cooling times. Main improvements with respect to the previous release of the activation code package (the ANITA-2000) are: the possibility to choose among updated neutron activation data libraries, the evaluation of the decay gamma source in the Vitamin-J 42- energy group structure and the introduction of updated clearance levels data (derived from the IAEA Safety Guide, No. RS-G-1.7). Different 175-group neutron activation libraries (based on FENDL/A-2.0, EAF-2003, and EAF-2005.1 neutron activation cross section data) are included in ANITA-2007 code package. The decay, hazard and clearance data library includes decay data based on the FENDL/D-2.0, hazard data based on the ICRP-72 committed effective dose equivalent from inhalation and ingestion (in Sv/Bq) of radio-nuclides and two sets of clearance levels data (the first set contains the “unconditional clearance levels”, based on IAEA-TECDOC-855 and the second one contains the updated values based on IAEA Safety Guide, No. RS-G-1.7). The gamma library (in the 42- Vitamin-J energy group structure) is based on the FENDL/D-2.0 evaluated decay data file. Up to 2000 irradiation time intervals can be considered and a different neutron loading can be used for each irradiation time interval. The updated code package ANITA-2007 has been tested by running sample problems and comparing the results with those obtained with ANITA-2000 and with EASY-2005 code packages. No differences between ANITA-2007 and ANITA-2000 activation parameters calculations and discrepancies within 1% between ANITA-2007 and EASY-2005.1 results have been found. The ANITA-2007 code package version running on a PC (Windows 98, 2000,XP) is actually distributed by ENEA. A CD-Rom containing the executable file ANITA-4U, all the necessary data libraries, the how-to-use manual and few test-case problems will be made available, after ENEA approval, upon request to: Dr. Tonio Pinna, ENEA FUS/TEC - Fusion Technology, Safety & Environment Section, Via Enrico Fermi 45, I-00044, Frascati (Rome), Italy. Email: pinna@frascati.enea.it.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
