ML19270G419

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Responds to IE Bulletin 79-07.Discusses Methods of Analysis, Program Listings,Program Verification & Plan of Action & Impact.Computer Code Listing Encl
ML19270G419
Person / Time
Site: Pilgrim
Issue date: 04/24/1979
From: Andognini G
BOSTON EDISON CO.
To: Grier B
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
References
79-78, NUDOCS 7906070002
Download: ML19270G419 (3)


Text

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RECo. Ltr. # 79-78

a. c= m--- n Apell 24, 1979 Mr. Boyce M. Criar off. ice of Inspectics and Enforcement Region I U.S. Muclear Regulatory Commission 631 Park Avenue King of Prussia, Pa. 19406 USNRC Office of Inspection and Enforcement Bulleti,n Number 79-07 Cent'emen:

We fallowing information is provided in response to the subj ect bulletia:-

ltem 1 Hethods of Analysis a) The BAPS computer program, used by Ceneral Electric for the seismic analysia of the Pilgrim 1 main steam and recirculation piping com-bined directional seismic responses by algehrnic sur b) No other computer program used in either the original design of, or suhsequent modifications to, safety related piping systems on Pilgrim 1 used any of the meti.ods listed in the subject bulletin.

Icea 2 Program Listingts Ma huve requested that CE provide a complete listing of the DAPS program. As soon as we receive it we will forward chia. to you as reques4:ed.

Item 3 Program Vecif-ication Attachman.t A ltats the originators of all computer programs used on the safety related piping systems at Pilgrim 1 as well as the ver-ificacion code used for each.

Irem 4 Plan of Actfon and Impact a) In order to confirm that the affected piping (i.e.. the main atsam and recirculation piping) meets code requirements, it has been remnalyzed by Canaral Electric Co. using the PISYS cesputer program, which com-bines directional resposses in an acceptable manner. This reevaluation, which is a preliminary analysis at this point, confirms that piping stresses meet ASME Code allowable. A sununary of the veriflestion pro-cadere for the FISYS program is being prepared by CE and will be f or-verdad to you as soon as we receive it.

79060700o2_

D.E.,urier 4f24/79

. :Pasa 2 . .. .

.,11 tem 4

. b) t Sesed. on .this.remnalysisg. vec have.4etstatned that tha ,espehiltty of ithn: plant to..inefely utr.harand m. .sef.smic event.. has not been. zfixcted; c7.'dthe Jabove ment.ioned ruanalysia; was perfocmed on tha. pip,ing rf ss i.. as originally desianed.. . Wrif.icat-ion .thur the psesent condiguras f on

cf'.tha- systema does noe affect thmee .grreliminary .conchraions la in

.. process.

d)r.c Boston.Blison engineers u.ill be. dimenssing with. Cancral. Electric 2.his

. .ueek che hilowins:

1).. ,the. adequacy .anct cepleteness of sche. P.LSTS remnalysis;

. (1). s meconfinntion:.that in no: case arm code allouable

. scremmen, ezecedecL; .and

- .111) . 'eme aM 13hment' of .t. plan:snst scheduls far: .oempletion of

..the. detailed.finalaraport.

. We trust .that this .information.. is responsive to your resca. in. the .aubject hullecia.. If.vecran be of. any: f ttr:ther aeristance pl. nase. contac.t us at your convenis.sce.

Very 1.ruly: yours.

M(L2

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Attachment A

. ..s : . ..' , . . . . .

Conrputer, code I.isting Code Written By verified By

1) DAPS Cencral Electric Co. 1.ater
2) ME-672 Bechtel Power Corp. PISOL (EDS Nuclear) .

PIPESD (UC Berkley &

John A. Blume & Assoc.)

TPIPE (PHP Systems Eng-insering Inc.)

3) PISOL EDS Nuclear NUPIPE (Nuclear Services Corp.) PIPESD, ADLPIPE *

(Arthur D. 1.ittle Corp)

ME 101 (Bechtel Power corp)

4) TMRSAP Teledyne Engineering ADLPIPE (Por Single Services Direction Earthquake Response)
5) NUPIPE  % clear Services Corp. ADLPIPE (For Single Direction Earthquake Response)

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