Published November 2008 | Version v1
Report Open

Development of a Fission Products Release Analysis Code COPA-FPREL

Creators

Description

A computer code, COPA-FPREL, has been developed to estimate the releases of fission products from a high temperature gas-cooled reactor (HTGR) fuel under normal and accident conditions. The COPA-FPREL code treats the migration of fission product in a coated fuel particle and a fuel element, and the leakage into a coolant using a finite difference method. In the finite difference method, the kernel, buffer and the coating layers of a coated fuel particle are divided into small intervals, respectively. A Fickian diffusion equation including birth rates is applied to the intervals. The fuel element is also divided into various small intervals, respectively. A Fickian diffusion equation including source terms is applied to the intervals. For the isotopes Cs-137, Sr-90 and Ag-110m, the fractional releases from a TRISO-coated fuel particle, a pebble and a fuel block under heating and irradiation were calculated using the COPA-FPREL

Availability note (English)

Available from INIS in electronic form; Also available from KAERI

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Additional details

Publishing Information

Imprint Pagination
99 p.
Report number
KAERI/TR--3649/2008

INIS

Country of Publication
Korea, Republic of
Country of Input or Organization
Korea, Republic of
INIS RN
40070090
Subject category
S21: SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS;
Descriptors DEI
C CODES; COATED FUEL PARTICLES; DIFFUSION; FISSION PRODUCT RELEASE; FUEL ELEMENTS; HTGR TYPE REACTORS; LEAKS; SOURCE TERMS
Descriptors DEC
COMPUTER CODES; FUEL PARTICLES; GAS COOLED REACTORS; GRAPHITE MODERATED REACTORS; REACTOR COMPONENTS; REACTORS

Optional Information

Notes
16 refs, 16 figs, 10 tabs