ML19323C357

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RO 50-336/80-18:during Ongoing Hanger Base Plate Analysis Required by IE Bulletin 79-02,discovered That Several Svc Water Support Hangers Did Not Provide Factor of Safety Greater than Two.Repair Work on 12 Hangers Is Underway
ML19323C357
Person / Time
Site: Millstone 
Issue date: 05/09/1980
From: Opeka J
NORTHEAST NUCLEAR ENERGY CO.
To:
References
IEB-79-02, IEB-79-2, NUDOCS 8005150389
Download: ML19323C357 (1)


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P.ay 0, 1980 F:7-2 4391 Mr. Em/ce H. Grier M rector, Region I Mf fee of In spectir.n and GTforcemnt II. 9. r:.> clear fro;ulatory Coa,f ssion 631 P. irk Avenue Kiu.t of I'rvssia, Penr.sylv.infa 19405 F.scili ty Or.ornting t.femca 76. D?R-65 f..A r;...co:

n9eEct tio.53-336 Reysrtshie Occurrc+ce 50-335/n0-1f5 i'.:ar Hr. Grier:

This lettor provir:os c.r.ti T1 cation of ReportiSTo Occtrrrence CD-78 p.srue. int to ti,e rWrirc. cnts of NiiTGton2 l'ait ? ApNndix A Technical The report en.cerr.s the <f f scavery Spc<.1 f ica tinac, Soction 3.1.C.T.not sp>c1fically coir.fr~t red in the SMT or Techntca o f cor.d4 r som th..t re;uirc rewdini actica r,r corrwctive Nasures T.t-ci f f ra tf or.+,

Wi! Ton, to pec/ent the existence or develo;rar.t of n unscafe co.

ti.o on-5pirq hanger be. o-plate enolysis for f;RC IE Uulictin c

pe rf r-j it vsas (,aterT;ined that several wrvica water support bsnqurs 79-07, Thereforo, did nat per,vir~a a factor of safety greater than twn.

f,cth c.orvice watre hexfors were ct.?ciared fraperab7e Watch resulted to plant operation par Technical Sr+cificatina 3.0.3 sir,co conditions

>..-rc f p exces of thma addenscott in the Actfoe 5tnteraent of Twchnical 5;a.ct rIcetion 3.7.4.1.

AccordingTy, props. rating w:re rede to procs.-d to placa tha pinnt in cold sh;steftwa within 30 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br />.

P (7 7) herners, in addi tfon is nua protoc-din <J on t>;eiv:

b p*ir wark to forther invest 44ticns in accordance with IE Eulletin 79-02.

1*urtbar iv.~on stion will ba provid,:t in the twa wd4 rgart.

Yours truly.

NOP,TEi/.ST FNCLE/.2 FrifiGY CM' PAW d lr-.-

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