JOPSS - Search Results

JAEA Reports

Internal dose coefficients for off-site radiological consequence analysis of nuclear reactor accidents

Hato, Shinji*; Homma, Toshimitsu

JAERI-Data/Code 2005-006, 549 Pages, 2005/09

JAERI-Data-Code-2005-006.pdf:33.24MB

The OSCAAR computer code for use in probabilistic accident consequence assessment (Level3PSA) developed at JAERI has calculated dose to the public with internal dose conversion factors based on dosimetric models and biokinetic data provided in ICRP Publication 30. Since ICRP issued age-dependent biokinetic models for a limited set of radioisotopes as ICRP Publication 56, a new Human Respiratory Tract model, age-dependent biokinetic model for other radioisotopes and urinary and faecal excretion models were issued. ICRP has published age-dependent internal dose coefficients for a large set of radionuclides in its publications, but they provided only committed effective dose coefficients for inhalation and ingestion. Since OSCAAR estimated acute and late health effects for public, it needs internal dose coefficients for specific tissues and organs in arbitrary integration times.This report describes a code DSYS developed for calculating dose coefficients based on these new ICRP models. It also provides the internal dose coefficients for 54 radionuclides used in OSCAAR calculations.

Journal Articles

Development of tissue substitutes with high mass density

Kinase, Sakae; Noguchi, Hiroshi; Sakamoto, Yukio; Nakamura, Takashi*; Kimura, Masaya*

Proceedings of 1st Asian and Oceanic Congress for Radiation Protection (AOCRP-1) (CD-ROM), 10 Pages, 2002/10

It is necessary to develop suitable tissue substitutes for the respiratory tract phantom. In the present study, optimum amounts of additive in the base materials were calculated in accordance with the basic data method. On the basis of the method, tissue substitutes with high mass density were made on an experimental basis. The substitutes were examined for the photon transmissions using 16.6 keV K-Xrays from Nb-93m and 59.5 keV gamma-rays from Am-241. It was found that the experimental transmission curves of the tissue substitutes are in good agreement with the calculated ones. Furthermore, mass attenuation coefficients for the tissue substitutes of the JAERI torso phantom were evaluated. It was found that the tissue substitutes are suitable as phantom materials and can simulate the body tissues defined in ICRP Publication.23.

Journal Articles