ML20125D719
| ML20125D719 | |
| Person / Time | |
|---|---|
| Site: | Washington Public Power Supply System |
| Issue date: | 12/17/1979 |
| From: | Taylor J BABCOCK & WILCOX CO. |
| To: | |
| Shared Package | |
| ML20125D715 | List: |
| References | |
| REF-PT21-79-186-000 NUDOCS 8001150483 | |
| Download: ML20125D719 (4) | |
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Te.eoS:ns: (8343 3541111 Decetber 17, 1979 The Office of tne Director of Inspection and Enforcer, ant U.S. liuclesr T.cgulatory Co :,ission Washington, D.C.
20555 Attention: Mr. E. B. Blaci. wood Gentleren:
Furcuant with the retuirarents 'of 10 CFR II, this written report is a folic;-u: of a verbal report.-sce at 1:' 0 PM C,ece.rer 14, 1979, to Mr. E. B. Blach: cod by telec:n concerning :efects in a c:re fleed.
syste:n isolation valve and possible defects in six (6) decay heat-reroval isolation valves supplied to 'a'ashington Pt,lic Pcuer Sucply Sys ter.s. Tne report was r. ace for Mr. J. H. P.acMillan. Vice Presicent, fhiclear Power Generation Division. BabcccF. & Wilcox Cr:pany. Old Forest P.oad, P. O. Sox 1250, Lynchburg, Virginia 24505, by O. Utrs and T. L. Balcain of tne Coreany's Licensing Section. ::r. Mac lillan was inforced of this reportamie concern at 8:20 A'i, Decer.ber 14, 1979.
The report was of tuo visual linear defects discovered by the canufacturer inside the b:cy of a c re ficoding syste. isolation valve.
4CF-VIA sucatied to Wasnington Public Pewar Suroly System by the WKM Civision of ACF Indust. ries, houston, Texas, uncer B&W Co: pany centract nu-t>er 620 0032 for unit W:;P.:. This valve nad been returned to VI':J by VTPSS at our direction for rework of an internal relief valve. The report is cace uncer 10 CFP. 21 of a defect in a basic cer:>cnent used.to
'ritigate the conse:;uences of accicents which could result in potential cf fsite exposures."
Ad:'Itf onally, the rep:rt covers unacceptable Indicaticas in six (6) oc:ay heat re oval system isolatica valves four.d by WFPSS by tie ASP,E Section XI preservice baseline inspectien. Tnese indications were noted by visual inspection and/cr penetrant tests in tne inlet and outlet ccnduits of the follwing isolation valves:
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The BNote A WNea Comtaar i ts:43!nhet! 1867 90022>52.
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4 Babe:ckc\\'/decx
,Th_e Of fice or the Direet:r of inspect 1co' and inforcerant Fag: 2 Cece:ber 17,1979 These indi:ations are being re;:rted under 10 CTP. 21 as pessible defects i
in basic co ;:nonts desiened "to assure tne ir.tegrity of the reactor ecolant pressure :an ary".
Tnese valves were also su: plied to WFP55 oy WKli Division of ACf Industries, Houston, Texas uncer SE! Cc..p:ny contracts 62G-0023 and 620 0032.
No UrM valves have been su; plied by Babcock & Wilcox Co pany to any of our Operating Plants. B&W has su: plied 48 valves.snufacturec by VX,$1 for backlog centracts. 'ihey are:
e 2 decay heat cceler outlet control valves for Per,<er -
Authority of the SL te of l:ew York under c:ntract c20-0031
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.' s 4 decay hes: cooler cutlet control valves for TVA under c 4 tract 620 0013 and 620 0016 - Bellefonte Units 1 and 2 12 isolation valves and 2 decey heat ecoler cen:rol 4
valves for Portland General Electric, under c.ntracts 320-0024 and 520-0330 for Pebble Springs 1 and,2 e 24 isolation valves and 4 decay heat cesler outlet centrol valves supplied b WPP55 on contract 620-0023 and 620-0022 for WI;P 1 & 4.
All custo.ers who are beino se: plied WrJ4 valves have been notified of this 2
cencern and will be kept advised of the progress of investigations and selected fixes.
A pregram is being d:vele:ed and. initiated by BC! Co-cany, WFPSS, and VrJi to atter:t to determine er:bacle cause anc extent of tnese defects and indications and.to deter.ine ac:cstsble fixes. The follo.e-up action plan will inclue: assurance of the acteotability of all 48 valvas supplied p B12 Co:pany contracts by 'aTJ1 A list of the Wrd valves sus; lied by 21'.! with notation of the valves Vita d:fccts or indications and a sketch snowing core ficod valve defccts are attacned.
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Jarcs H. Thylor PMnager, L.icensing JdT:dsf Attcch.
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HKf1 Valves with Possible Ocrects Valve Valve Item Class Ihstynation Sys tem / Plan t Dafect Noted Dy_
i:t D: cay lleat Caic-U Class 1 DI - Y12A 011R/ Unit i Visual and PT Re.vval System Discovered Isolation valves
.by !!PP55 DI - V120 DIR/ Unit 1 PT Class 1 4 DI - V110 DIR/ Unit 4 Visual and PT VilA DIR/ Unit 4 Visual and PT V12A DIR/ Unit 4 Visual and PT.
V120 DIR/ Unit 4 Visual and PT I
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. Core Flooding
' Class 2 4 CF - IA CF/Unt t 4 Visual linear j' j - System Isolation Discovered l
cracks plus
,.I Valves by WXf t radiography l
WKtt Total Valve Count doctlog Contracts i
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PASNY 2 - All decay heat cooler outlet control valves i
TVA 4 - All deccy heat cooler outlet control valves j
PGE 14 - 121 solation valves + 2 decay licat cooler outlet control l valves j
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s HPPSS 28 - 24 isolation: valves + 4 decay lical cooler outlet control valves 48 ilKit Valves
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