Release of iodine and noble gas fission products from defected fuel elements during reactor shutdown and start-up

Journal Article · Sat Dec 01 00:00:00 EST 1990 · Nuclear Technology; (United States)

OSTI ID:5105113

Lewis, B J; Bonin, H W ^[1]; MacDonald, R D ^[2]

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1. Royal Military College of Canada, Dept. of Chemistry and Chemical Engineering, Kingston, Ontario (CA)
2. Atomic Energy of Canada Ltd., Chalk River, ON (Canada). Chalk River Nuclear Labs.

This paper provides data from a single defected fuel element operating in-reactor are used to develop a physically based model for describing the increased release of iodine and noble gas fission products to the primary coolant following a reactor shutdown and start-up. Iodines are only released on reactor shutdown, whereas both species are observed on start-up. a dependence on the decay constant of {lambda} {sup {minus}3/2} is typically observed for these transient releases, indicative of a source of release from fuel cracking with little holdup due to transport in the fuel to-sheath gap.

• OSTI ID: 5105113
• Journal Information: Nuclear Technology; (United States), Vol. 92:3; ISSN 0029-5450
• Country of Publication: United States
• Language: English

Related Subjects

22 GENERAL STUDIES OF NUCLEAR REACTORS
FUEL ELEMENTS
DESIGN
TRANSIENT OVERPOWER ACCIDENTS
FISSION PRODUCT RELEASE
IODINE
RARE GASES
REACTOR SHUTDOWN
REACTOR START-UP
ACCIDENTS
ELEMENTS
FLUIDS
GASES
HALOGENS
NONMETALS
OPERATION
REACTOR ACCIDENTS
REACTOR COMPONENTS
REACTOR OPERATION
SHUTDOWN
START-UP
220900* - Nuclear Reactor Technology- Reactor Safety
220500 - Nuclear Reactor Technology- Environmental Aspects
220400 - Nuclear Reactor Technology- Control Systems