ML20085C589

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Responds Further to AEC Re Verification of Wall Thickness of Certain Valves.Response Deals W/Browns Ferry Only.Valves Important to Safety Tabulated
ML20085C589
Person / Time
Site: Browns Ferry, Sequoyah, 05000000
Issue date: 09/29/1972
From: Gilleland J
TENNESSEE VALLEY AUTHORITY
To: Jennifer Davis
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML082390163 List:
References
NUDOCS 8307110009
Download: ML20085C589 (4)


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1 IceluP d alst in t he l h ting in the enclosure tra valvec W eh l

hidthi 1.all shi e':nerr ea ' mured tnd vitnected, but for thicn we h rte nc - c ccrda of wel] thick' < mea cinec thin rac not recyired by the cadcr end rpecifictt ic:7 'mder vhich ti."se vulvec purchtsci "er th:.;

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_.c of the planc rnd tentstive schedu2es for their i:npleir.c ntation to deronstrcte th.t the.rall thicknerres of the nupplica valve:

r.cet the requirm.ts of the upecifications an ' codes u 1Cer vhi ch T, hey i:ere prehened.

A pr';ecoure for r.easurement o f the valvec t Lhe site vill be r.ac, n'caile.ble to your inspector after the Lboy. cited date.

Ue believe that your in ".iry rhculd not apply to for ed-bo.3y c

valver since th<-ir, alls re norr:.all" thicker thart required, and achinin;; inherently instren a Creater degree of uniformity than doca the c;sti::c t echn que.

'Je alco believe that year inquiry r.hculd to li:r.ited to "r_lycn for vater lines having gfl20lM h?'Ab88R'oQgggg, f"}

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. Mr. Jchn G. Tavic Cep k ber 2h 1972 4

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i nomino.1 pipe aizes rrrenter than two inches and to vn1vra for c r anu:c.1 pipe citee (;reater than four inches.

l nt e nt lires hailu l

The feed'.7at er ry:" a= In capable of r.93 ntair.ing pressur:' vessel l

vnter level for bred:: in lines *:mller than theae.

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We pronnse to li='.t our ' arification pregrm1 to ccut valves enly anti te verliy wall bichnacces er valvec Intr;er than two inchen i

nominal pir.e cite in water linen m.d lart;er than four inches nomi-L nal pipe sine in steen.. lines, i

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We hope these res;cnnes vill be suticractory.

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