Published February 1998 | Version v1
Report Metadata-only

The Effect of Grain Size on FGR and PCMI in High Burnup Fuel (IFA-534.14) (Preliminary Results)

Creators

Description

Fission gas release and cladding elongation data of four high burnup (∼52 MWd/kgUO2) PWR fuel rods with three different grain size (8.5,22.1 and 38.0 μm) have been preliminary analysed and compared in the IFA-534.14 experiment for the first month of irradiation. The fuel rods are re-fabricated from segments base irradiated in a commercial nuclear power plant. The re-instrumentation includes bellows pressure transducers and cladding elongation sensors. The rods were bumped to a LHGR of ∼30 kW/m in the Halden reactor. The fission gas release results indicates that rod 19 (grain size 8.5 μm) have experienced a higher degree of fission gas atom diffusion to grain boundaries during the base irradiation than rod 18 (grain size 22.1 μm). This fission gas is subsequently released to the free volume of the rods during the power bumps in the Halden reactor. After one month of irradiation the fission gas release is ∼3 % in rod 18 and ∼8 % in rod 19. The point of interaction for pellet cladding mechanical interaction (PCMI) is at a linear heat rate just above 20 kW/m for both rod 20 (grain size 22.1 μm) and rod 21 (grain size 38.0 μm). (author)

Availability note (English)

Available from IFE, PO Box 173, 1751 Halden Norway

Additional details

Publishing Information

Imprint Pagination
7 p.
Report number
HWR--561

INIS

Country of Publication
Norway
Country of Input or Organization
Norway
INIS RN
35032631
Subject category
S21: SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS;
Resource subtype / Literary indicator
Non-conventional Literature
Descriptors DEI
BURNUP; ENERGY; FISSION PRODUCT RELEASE; GRAIN SIZE; HBWR REACTOR; INTERNATIONAL COOPERATION; NUCLEAR FUELS; OECD
Descriptors DEC
BHWR TYPE REACTORS; COOPERATION; ENERGY SOURCES; ENRICHED URANIUM REACTORS; EXPERIMENTAL REACTORS; FUELS; HEAVY WATER COOLED REACTORS; HEAVY WATER MODERATED REACTORS; INTERNATIONAL ORGANIZATIONS; MATERIALS; MICROSTRUCTURE; POWER REACTORS; REACTOR MATERIALS; REACTORS; RESEARCH AND TEST REACTORS; SIZE; TANK TYPE REACTORS; THERMAL REACTORS

Optional Information

Notes
9 refs., 8 figs.