ML20196A897

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Package of Supplementary Info for Topical Rept 045
ML20196A897
Person / Time
Site: Oyster Creek
Issue date: 02/05/1988
From:
GENERAL PUBLIC UTILITIES CORP.
To:
References
NUDOCS 8802050198
Download: ML20196A897 (21)


Text

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  • 7 %nsh OYSTER CREEK NUCLEAR GENERATING STATION TOPICAL REPORT 045 SUPPLEMENTARY INFORMATION 3

A comparison has been performed between M003 & M004 on three transients, namely pressure perturbation, level perturbation, and turbine trip using point kinetics for all transients. Results of the pressure perturbation are shown in Attachment 1, while level perturbation results are 2own in Attachment 2 and the turbine trip in Attachment 3. The transient's description is the same ,

as in TR-045.

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The results show that for mild transients (pressure and level perturbations) the two versions of the code are identical, while for a severe transient (turbine trip) there is a small deviation that showed in pressure, core flow, level and steam flow during the later stages in the transient. Those deviations have no impact on thermal limits or peak pressure because they take place past those limits.

The cause of the deviation was found to be the non-equilibrium pressurizer option used for the upper downcomer when this option was turned off, identical results were obtained. It is believed that the error corrections on this model caused these deviations.

The turbine trip test with point kinetics shown here in no way indicates its validity for reload application since such option is not used by GPUN and it was done for comparison purposes only.

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