Diffusion theory of fission gas migration in irradiated nuclear fuel UO2

Forsberg, Karl; Massih, Ali R

doi:10.1016/0022-3115(85)90071-6

Cited by 106 publications

(63 citation statements)

References 8 publications

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“…The simple model of Forsberg and Massih (1985) is attractive because it incorporates all these features while remaining efficient and relatively easy to program. Therefore, a modified version of this model (named MASSIH) was programmed for use in FRAPCON-3.…”

Section: Experimental Evidence For Grain-boundary Gas Storage and Relmentioning

confidence: 99%

FRAPCON-3: Modifications to fuel rod material properties and performance models for high-burnup application

Lanning¹,

Beyer²,

Painter³

1997

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Section: Experimental Evidence For Grain-boundary Gas Storage and Relmentioning

confidence: 99%

FRAPCON-3: Modifications to fuel rod material properties and performance models for high-burnup application

Lanning¹,

Beyer²,

Painter³

1997

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“…leading to a time delav in release of aasesaenerated in the fuel. Two versions of a two-kaae model developed by ~o r s g e r~ a i d Massih [2] were implemented using Mathcad fi]. The orisinal Forsbers and Massih model 121 and a modified version of the Forsbem and ~a-ssih model t k t is used in a comme&ally available fuel performance code-(FRAPCON-3) [4] were examined.…”

Section: Jan 2 3 2008mentioning

confidence: 99%

“…The values are based on the following approximation [2]: constant and that q is constant over the interval AT. The &ncentrations of gas atoms can be determined using an iterative process; i.e., gas concentrations are calculated using q, and then a new q is determined using these gas concentrations.…”

Section: An and B Are As Followsmentioning

confidence: 99%

“…The standard commercial fuel performance code.FRAPCON-3, uses a modified version of the Forsberg and Massih equations [2] to calculated fission gas release. The modifications to the Forsberg and Massih model allow the FRAPCON-3 fission gas release model to circumvent deficiencies present in the Forsberg and Massih model while retaining its efficient solution algorithm [14].…”

Section: An and B Are As Followsmentioning

confidence: 99%

“…FitMult is a multiplier used for optimization by PNNL (FitMult= 300) while the term in the parenthesis is the term used by Forsberg and Massih (h4*pB, Eq20 and 21) to describe resolution [2]. Equations 25 through 32 were entered into Mathcad and used to solve for gas release.…”

Section: An and B Are As Followsmentioning

confidence: 99%

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Modeling of Fission Gas Release in UO2

Krohn¹

2006

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A lwo-stage gas release model was examined to determine if it could provide a physically realistic and accurate model for fission gas release under Prometheus conditions. The single-stage Booth model [I], which is often used to calculate fission aas release. is considered to be oversimolified and not reoresentative of the mechanisms that occur during fission gas release. TWO-&age gas release models require saturation at the grain boundaries before aas is release. leading to a time delav in release of aasesaenerated in the fuel. Two versions of a two-kaae model developed by ~o r s g e r~ a i d Massih [2] were implemented using Mathcad fi]. The orisinal Forsbers and Massih model 121 and a modified version of the Forsbem and ~a-ssih model t k t is used in a comme&ally available fuel performance code- (FRAPCON-3) [4] were examined. After an examination of these models, it is apparent that without further development and validation neither of these models should be used to calculate fission gas release under Prometheus-type conditions. There is too much uncertainty in the input parameters used in the models. In addition. the data used to tune the modified Forsberg and Massih model (FRAPCON-3) was collected under commercial reactor conditions, which will have higher fission rates relative to Prometheus conditions [4].Introduction:

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