ML19319D808

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RO-77-21:on 771215,incore Detector Signals Calculated Nonconservative Positive Power Imbalance Estimates.Caused by Error in Computer Software.Administrative Controls Imposed Until Computer Software Package Revised
ML19319D808
Person / Time
Site: Rancho Seco
Issue date: 12/29/1977
From: Mattimoe J
SACRAMENTO MUNICIPAL UTILITY DISTRICT
To:
Shared Package
ML19319D805 List:
References
NUDOCS 8003250802
Download: ML19319D808 (1)


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,; ember 15,1977, the reactor vendor (3&W) informed the District that an error in l

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..:.sted by incore detectors. Administrative controls i= nosed a 2.2 cereent l

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-- -tion factors for detector and background signals were imoronerly anofied.

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-ation in positive operations imbalance limit is adequate througli appro:.1=ately' l,

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Vendor will supply sof tware change remedving situation within 100 ET?D.

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.. 1*wspapers and wire services notified December 21, 1977 l

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