ML20126C531
| ML20126C531 | |
| Person / Time | |
|---|---|
| Site: | North Anna  |
| Issue date: | 03/17/1980 |
| From: | VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.) |
| To: | |
| References | |
| NUDOCS 8004030262 | |
| Download: ML20126C531 (1) | |
Text
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24 Four Report 4Lle E.ent Written Follo -Up E' vent:
Pctantial Brealir.g of Guide TcLe Support Pins Cte to Strect Car,uton l
Cracking LER/50 EO D E/0)T-0 i
ifacent st; port pin ingscticns at a iceeigt plant ravaaled stress ccc.o-sion cracVing in Vastingt.GGLe supplied ca.trg1 rad guida _tLCu Sht.I.at't piac whicn had tean solutir.n t e.it treated at t
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Lato. a t a.'y t estii.g ii.da t,..
that susceptaL111ty to ste ess corrosicr. crackir.g den sasai f t h it..m.ning solution test treat.. ant t
(c.4arato a ca.J 1, g SLpi.a.'t pin; wh t u.
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heat traated in the rar. e of 1950;'F to 2 Cal F ilsve little, if any,* pcte., tid for stress corrusica cracif r4 even ur..Gr accelerated tes ti ng coa.u l t t r...:.
A Vestin;t,f.cuse saf ty evaluatica of ti:a pecblen has ccacitcad Liut cc. n ai cr.eration is r.at jacpa.ai2<.d by a o.aeda pin for r;un-lisec 16.id Inw t iu..
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!ior tn A.1..a Pc'.. e St a tica, c a to ts.e s..all f,ap tu t..un is.a
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Lhl guide tLLe and t!.a core pl. ate.
Unit 1 is prerantly cprating in a steady state ccadition at 1C6:. p...ar.
In the r: ear futura L'astingt: cute 1.111 ccudcct al.t..asanic inspectioni, at
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two cperating dcnestic plar.ts,of guidg tLLe scpract pins 14sving to16 tion rat trcat.w.t te.4 natures less ti.an 1E00 h results of ti.a cup [.ai t pin inspectic.n prtgc;.1 as s.cil as the on-Sair., t.aterials test pr ogro. util ce tecnir.e bl.ht furbter cerracti.e acticns, if any, ara r equirud.
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