scram.uncertainty: Fault Tree Uncertainty Analysis Acquired from SCRAM

Description Usage Arguments Details Value References Examples

View source: R/scram.uncertainty.R

Description

Interconnection with SCRAM by transferred XML files permits stochastic calculation of uncertainty factors for cut sets.

Usage

1
scram.uncertainty(DF, ntrials=1000, nbin=20, show=c(FALSE, FALSE))

Arguments

DF

A fault tree dataframe such as returned from ftree.make or related add... functions. Fault tree basic elements must be either probability or exposed types, INHIBIT gates will be converted to AND. Fault tree shall not contain PRIORITY, ALARM nor VOTE gates, voting is [to be] handled by the atleast gate type.

ntrials

The quantity of stochastic trials to be run for analysis.

nbin

The number of histogram bins to accumulate output results. This specification will also set the number of quantiles calculated.

show

A logigal vector determining whether to display [1] a histogram or [2] a plot of upper and lower bounds by quantile obtained from uncertainty analysis.

Details

"And one ring to bind them all ..." This function calls ftree2mef, callSCRAM, and readSCRAMuncertainty appropriately for the entered ftree object. Temporary files for SCRAM input and output are produced in the process. Graphical output is generated from readSCRAMuncertainty. For larger models with extensive trials additional graphics calls should be more efficiently made on readSCRAMuncertainty directly.

Value

Returns a list containing $probability, $quantiles, and $histogram data from uncertainty analysis.

References

Rauzy, Antoine, et. al. (2013) Open PSA Model Exchange Format v2.0 open-psa.org

Limnios, Nikolaos (2007) Fault Trees ISTE Ltd.

Nicholls, David [Editor] (2005) System Reliability Toolkit Reliability information Analysis Center

O'Connor, Patrick D.T. (1991) Practical Reliability Engineering John Wiley & Sons

Fussell, J., Vesely, W.E. (1972) A New Method for Obtaining Cut Sets for Fault Trees Transactions ANS, No. 15

Ericson, Clifton A. II (2011) Fault Tree Analysis Primer CreateSpace Inc.

Vesely, W.E., Goldberg, F.F., Roberts, N.H., Haasl, D.F. (1981) Fault Tree Handbook U.S. Nuclear Regulatory Commission

Vesely, W.E., Stamatelato, M., Dugan, J., Fragola, J., Minarick, J., Railsback, J. (2002) Fault Tree Handbook with Aerospace Applications NASA

Doelp, L.C., Lee, G.K., Linney, R.E., Ormsby R.W. (1984) Quantitative fault tree analysis: Gate-by-gate method Plant/Operations Progress Volume 3, Issue 4 American Institute of Chemical Engineers

Examples

1
## This function is completely device dependent.

jto888/FaultTree.SCRAM documentation built on Aug. 14, 2017, 10:32 p.m.