ML20040D819

Updated LER 81-002/01X-5:on 810927,prior to Fuel Loading, Engineer Discovered Error in Diagram Used to Locate Vertical Seismic Floor Response Spectra for Use in Plant Equipment & Sys Seismic Design.Unit 2 Diagram Used for Unit 1 Annulus

ML20040D819
Person / Time
Site:	Diablo Canyon
Issue date:	01/25/1982
From:	Baciarelli R PACIFIC GAS & ELECTRIC CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
Shared Package
ML20040D810	List: ML20040D809 ML20040D819
References
LER-81-002-01X, LER-81-2-1X, NUDOCS 8202020284
Download: ML20040D819 (1)

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Engineers, while in the process i grg) g of various design activities, discovered an error in a diagram used to l i m g ocate Vertical Seismic Floor Response (VSFR) spectra for use in plant e ,

t eouioment and systems seismic desion. The potential effect of this i

gg) garror is that some designs may not be in compliance with Hosgri seismic 9,,,g design criteria. i Unit 2 is similarly affected. ' This report is submitted ,

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' in accordance with Technical Specification 6.9.1.12.i.

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, 1 l I 9q ITTTI IDiagram for Unit 2 was erroneously used for Unit I annulus area.

1 EE) t incorrect diagram was used for Unit 1 VSFR spectra.

Affected systems are ,

, b t eing reviewed and modifications, as necessary, performed. This LER is ,

g t_ updated by PGandE semi-monthly status report to the Staff dated Jan. 25,i  !

t1982, submitted as a requirement of Order CLI 81-30 i

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