Dose estimation in early stage of CANDU-6 severe accident using RODOS system
Creators
- 1. Department of Applied Physics, Horia Hulubei National Institute for Physics and Nuclear Engineering, PO Box MG-6, RO-76900 Bucharest (Romania)
Description
Development and application of models for accident consequences requires comprehensive information about the air and ground surface contamination due to atmospheric dispersion and deposition processes. By using the RODOS expert system we made an evaluation of Complementary Cumulative Frequency Distribution (CCFD) for three important radionuclides (I-131, Cs-137, H-3) released in postulated CANDU-6 severe accident, Late Core Disassembly (LCD) and Partial Melt (PM). To obtain the CCFD functions 240 meteorological scenarios were taken into consideration; radionuclide concentrations were calculated in a 2 to 8 km zone around the CANDU reactor. The ground deposition CCFD curve for H-3 and the curve of CCFD vs. I-131 dose rate are presented for the case of LCD accident. Similar CCFD curves for Cs-137 in a case of LCD accident and I-131 and Cs-137 in a case of PM accident were obtained. Due to the large amount of D2O contained in CANDU core, a significant amount of tritium is generated and in a case of a LCD event the entire amount of tritium is released from the containment and becomes a source of radioactivity. (authors)
Availability note (English)
Available from author(s) or from Office of Documentation, Publication and Printing, Horia Hulubei National Institute for Physics and Nuclear Engineering, PO Box MG-6, RO-76900 Bucharest (RO)Additional details
Publishing Information
- Imprint Title
- NIPNE-Scientific Report 1997
- Imprint Pagination
- 285 p.
- Journal Page Range
- p. 180
- ISSN
- 1454-2714
- Report number
- IFIN-HH-AR--1997
INIS
- Country of Publication
- Romania
- Country of Input or Organization
- Romania
- INIS RN
- 31032911
- Subject category
- S21: SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS; S22: GENERAL STUDIES OF NUCLEAR REACTORS; S61: RADIATION PROTECTION AND DOSIMETRY;
- Resource subtype / Literary indicator
- Non-conventional Literature, Progress Report
- Descriptors DEI
- CANDU TYPE REACTORS; EMERGENCY PLANS; EXPERT SYSTEMS; FALLOUT DEPOSITS; HEAVY WATER; PROGRESS REPORT; RADIATION MONITORING; REACTOR ACCIDENTS; TRITIUM
- Descriptors DEC
- ACCIDENTS; BETA DECAY RADIOISOTOPES; BETA-MINUS DECAY RADIOISOTOPES; DEUTERIUM COMPOUNDS; DOCUMENT TYPES; FALLOUT; HEAVY WATER MODERATED REACTORS; HYDROGEN COMPOUNDS; HYDROGEN ISOTOPES; ISOTOPES; LIGHT NUCLEI; MONITORING; NUCLEI; ODD-EVEN NUCLEI; OXYGEN COMPOUNDS; POWER REACTORS; PRESSURE TUBE REACTORS; RADIOISOTOPES; REACTORS; THERMAL REACTORS; WATER; YEARS LIVING RADIOISOTOPES
Optional Information
- Notes
- 2 refs., 2 figs