ML19309E149

Proposed Revision to Tech Spec,Section 5.7.1,re Seismic Classification

ML19309E149
Person / Time
Site:	Trojan File:Portland General Electric icon.png
Issue date:	04/14/1980
From:	PORTLAND GENERAL ELECTRIC CO.
To:
Shared Package
ML19309E145	List: ML19309E144 ML19309E146 ML19309E149
References
TAC-07551, TAC-11299, TAC-7551, NUDOCS 8004180470
Download: ML19309E149 (1)

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Attachmtnt 21-1 Page 1 of 1 DESIGN FEATURES

5. 7 SEISMIC CLASSIFICATION 5.7.1 Those structures, systems and components identified as Category I Items in Section 3.2.1 of the FSAR shall be designed and maintained to the original design provisions contained in Section 3.7 of the FSAR with allowance for normal degradation pursuant to the applicable Surveillance Reauirements except for the Control Building Complex which is subject to Specifications 5.7.2.1 and 5.7.2.2.

5.7.2.1 The Control-Auxiliary-Fuel Building Complex (Complex) shall be designed and maintained to the design provisions contained in PGE-1020,

" Report on Design Modifications for the Trojan Control Building", as supple-mented by the documentation listed in condition 2.C.(11) of the Operating License with allowance for normal degradation pursuant to the applicable Surveillance Requirements, i

5.7.2.2 No modifications which will result in a net:

(a) 1 percent increase in lateral shear forces on any story of the Complex; (b) I percent decrease in lateral shear resistance of any story of the Complex; (c) 5 percent increase in combined interstructure displacements between the Control and Turbine Buildings; or (d) 5 percent reduction in clear space between the Turbine and Control Buildings shall be performed without prior approval of the Director of Nuclear Reactor Regulation.

The modifications to the Control Building approved in License Condition 2.C.(11) are not subject to the above limitations.

An increase in equipment weight not to exceed 10 percent on a per story, per building basis is permissible and excluded from consideration under this specification.

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