ML19312D254

Responds to IE Bulletin 79-14, Seismic Analysis for As- Buile Safety-Related Piping Sys. Util Has Developed & Is Implementing Program to Ensure That Final Seismic Analyses Will Be Based on as-built Configuration of Plant

ML19312D254
Person / Time
Site:	Farley
Issue date:	01/15/1980
From:	Clayton F ALABAMA POWER CO.
To:	James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
References
IEB-79-14, NUDOCS 8003240072
Download: ML19312D254 (3)

Text

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'3 g. Alabama Power Company 600 North 18th Street -

'3* -. Post Office Box 2641 t ggg Birmingham. Atbomo 35291 - 8 Telephone 205 333-5341 ,,g gllR C g g

' I. /; f]y ,., '5 O, I: y g ... y s$ioNcWrhSnt AlabamaPower CC Jagg l, yl the southem electrc system January 15, 1980 Docket 50-364 IEB 79-14 Mr. James P. O'Reilly, Director U. S. Nuclear Regulatory Ctenission Office of Inspection & Enforcerent Begion II - 101 Marietta Street Suite 3100 Atlanta, Georgia 30303

Dear S'r:

i Alabama Power Ompany subnits the enclosed additional informaticn on the subject IE Bulletin for Farley Unit 2 as ommitted in my letter to you dated November 2,1979.

If you have any questions, please advise.

Yours very truly, l l

bvI t b.Clayton,)Jr.

FICjr/HRF/mnb cc: Mr. R. A. 'Ihamas Mr. G. F. Trowbridge Office of I&E i Divn. of Cbnstruction Inspection Washington, D. C.

Mr. M. D. Hunt, I&E, Region II i l

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Enclosure 1 --Response to I. E. Bu11etin 79-14: Farley Unit 2 Unit. 2 of the Farley. Nuclear Plant is still under construction and the final seismic-analyses have not been performed. An inspection of the existing plant configuration for the purposes of confirming the seismic analyses input information in existing design documents is not possible. However, Alabama Power Company has developed and is implementing a program to ensure that the

-final: seismic analyses will be based on the as-built configuration of the plant.

The scope of this program includes all safety related piping 2h inches in' diameter and greater and all seismic Category I. piping, regardless of size, which was dynamically analyzed by computer. The river water system which is common to both Unit 1 (operating) and Unit 2 is excluded since it was addressed under the Unit 179-14 program.

Through field inspection, Alabama Power is producing verified as-built information which will be used as input to the final seismic analyses. The field verified as-built- information and other design documents will include the following:

a.) pipe run geometry (length and direction) b.) location on the pipes of the following

1. valves

2. in-line pumps

3. pipe hangers

4. pipe restraints

.5. pipe anchors.

6. welded attachments 7.) floor and wall penetrations l 8.) piping welds (ASME Class 1 piping systems only) 9.)' any other in-line equipment 10.)- branch lines, drains, etc.

.c.) valve information

-1.) , valve-identification number 2.) valve' configuration 3.) extended operator orientation f 4.) valve weight (will be obtained from vendor supplied data)

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d.) ~ penetration information

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L1.) : penetration identification' number 2.)~ piping fixed at the penetration 3.) piping' free to move 4.) grouted or sealed sleeve 5.) clearances-e.)

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pipe support information-

-1.) support identification number 2.)~ directionL(restraint or load' carrying direction) 3.) type (spring, ~ snubber, rigid, structure frame)

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4.) size, orientation' and configuration of members and base plate (s).

Insulation will.be removed where necessary either to ' inspect welding on '

ASME Class 1 piping ' systems or to obtain any other required measurer.ents (e.g.

welded attachments). The field verified as-built information will be used to perform seismic analyses.. The sample package'of design documents for the  !

pressurizer relief line provided in the August 2,1979 response for Unit 1 is representative of the typ._a of design input information being generated by the valkdown.

, When a seismic analysis of the verified as-built information identifies an inspection element which is not consistent with analytical requirements (e.g. over-deflection of a hanger resulting :b2 excessive pipe wall stresses),

the designer.will' issue a change notice specifying the required corrective action.

- Alabama Power will supply the designer with a new field verified as-built after completing the corrective action. _This new as-built will be used as a revised input for the seismic analysis. i I' . 'The inspections _and analyses described above will be scheduled with.the-current construction activities in order to facilitate the inspections and eliminate  ;

unnecessary' duplication of. efforts.

. Existing FNP. Quality Control Procedures during the construction phase provide

adequate confidence ~that any changes in inspection elements occurring after the ,

' field inspection will be documented utilizing a Field Change Request and/or a

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Non-Conformance Report _ requiring designer approval. After receipt of an operating slicense for Unit ~2-the controls indicated in Attachment 2'of the October 5, 1979

- response-for Uhit 1 will. also be: applicable for Unit 2.

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