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Modelling and simulation the radioactive source-term of fission products in PWR type reactors; Modelagem e simulacao do termo-fonte radioativo de produtos de fissao em reatores nucleares do tipo PWR

Abstract

The source-term was defined with the purpose the quantify all radioactive nuclides released the nuclear reactor in the case of accidents. Nowadays the source-term is limited to the coolant of the primary circuit of reactors and may be measured or modelled with computer coders such as the TFP developed in this work. The calculational process is based on the linear chain techniques used in the CINDER-2 code. The TFP code considers forms of fission products release from the fuel pellet: Recoil, Knockout and Migration. The release from the gap to the coolant fluid is determined from the ratio between activity measured in the coolant and calculated activity in the gap. Considered the operational data of SURRY-1 reactor, the TFP code was run to obtain the source=term of this reactor. From the measured activities it was verified the reliability level of the model and the employed computational logic. The accuracy of the calculated quantities were compared to the measured data was considered satisfactory. (author)
Publication Date:
Jul 01, 1996
Product Type:
Thesis/Dissertation
Report Number:
INIS-BR-3759
Reference Number:
EDB-00:107212
Resource Relation:
Other Information: TH: Tese (M.Sc.); 102 refs., 27 figs., 17 tabs; PBD: 1996
Subject:
54 ENVIRONMENTAL SCIENCES; C CODES; COMPUTERIZED SIMULATION; COOLANTS; FISSION PRODUCT RELEASE; FISSION PRODUCTS; FUEL PELLETS; KNOCK-OUT REACTIONS; NUCLEAR DATA COLLECTIONS; RECOILS; SOURCE TERMS; SURRY-1 REACTOR; T CODES; URANIUM DIOXIDE
OSTI ID:
20047998
Research Organizations:
Instituto de Pesquisas Energeticas e Nucleares (IPEN), Sao Paulo, SP (Brazil)
Country of Origin:
Brazil
Language:
Portuguese
Other Identifying Numbers:
TRN: BR0039987011550
Availability:
Available from INIS in electronic form
Submitting Site:
BRN
Size:
119 pages
Announcement Date:

Citation Formats

Porfirio, Rogilson Nazare da Silva. Modelling and simulation the radioactive source-term of fission products in PWR type reactors; Modelagem e simulacao do termo-fonte radioativo de produtos de fissao em reatores nucleares do tipo PWR. Brazil: N. p., 1996. Web.
Porfirio, Rogilson Nazare da Silva. Modelling and simulation the radioactive source-term of fission products in PWR type reactors; Modelagem e simulacao do termo-fonte radioativo de produtos de fissao em reatores nucleares do tipo PWR. Brazil.
Porfirio, Rogilson Nazare da Silva. 1996. "Modelling and simulation the radioactive source-term of fission products in PWR type reactors; Modelagem e simulacao do termo-fonte radioativo de produtos de fissao em reatores nucleares do tipo PWR." Brazil.
@misc{etde_20047998,
title = {Modelling and simulation the radioactive source-term of fission products in PWR type reactors; Modelagem e simulacao do termo-fonte radioativo de produtos de fissao em reatores nucleares do tipo PWR}
author = {Porfirio, Rogilson Nazare da Silva}
abstractNote = {The source-term was defined with the purpose the quantify all radioactive nuclides released the nuclear reactor in the case of accidents. Nowadays the source-term is limited to the coolant of the primary circuit of reactors and may be measured or modelled with computer coders such as the TFP developed in this work. The calculational process is based on the linear chain techniques used in the CINDER-2 code. The TFP code considers forms of fission products release from the fuel pellet: Recoil, Knockout and Migration. The release from the gap to the coolant fluid is determined from the ratio between activity measured in the coolant and calculated activity in the gap. Considered the operational data of SURRY-1 reactor, the TFP code was run to obtain the source=term of this reactor. From the measured activities it was verified the reliability level of the model and the employed computational logic. The accuracy of the calculated quantities were compared to the measured data was considered satisfactory. (author)}
place = {Brazil}
year = {1996}
month = {Jul}
}