ML19309H926

LER 80-004/03L-0:on 800417,during Seismic Analysis of as-built safety-related Sys Per IE Bulletin 79-14, Discovered Overstressed Condition in Component Cooling Sys Piping.Caused by Lack of Support Upstream of Juncture

ML19309H926
Person / Time
Site:	Point Beach
Issue date:	05/05/1980
From:	Fay C WISCONSIN ELECTRIC POWER CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML19309H923	List: ML19309H922 ML19309H926
References
IEB-79-14, LER-80-004-03L-01, LER-80-4-3L-1, NUDOCS 8005200667
Download: ML19309H926 (1)

Text

NRC F OIM 3si6 U. S. NUCLE A3 CE!UL ATCGY COMMISSION (7 77)

, LICENSEE EVENT REPORT 8005200G(p]

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7 LICENSEE COOE 14 15 LICENSE NUM8ER 25 26 LICENSE TYPE Jo 57 CA T $8 CON'T a

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7 8 60 61 Dot.K E7 NUM8ER wt 69 EVENT OATE 74 75 af PORT DATE 80 EVENT DESCRIPTION AND PROBABLE CONSEQUENCES h lo 12'l lDuring seismic analysis of as-built safetv-related nininc systems in I F5TT] laccordance with IEB 79-14, an overstressed condition in the component i F5Tl lcooling system piping was discovered. The high stress area was at a l IOisIIstub end weld which joined the discharge of the two pumps. This iunc- 1 10161 Iture has a very large stress intensification factor which resulted in a I

['0T71 6 [ safe shutdown earthquake condition stress of 46,400 psi. This is l l O ia i l greater than the allowable of 27,000 osi but less than the tensile of I 7

s 960,000 ps kSTEu S CAuSE CAuSE CovP. VALVE CODE CODE SU8 CODE COMPONENT CODE SUSCODE SUSCOOE ITTTl 7 8 Iw IB l@ LB_J@ l A lh l P l Il p l E l XIX lh [_Djh (J,j h 9 to 11 12 13 18 19 20 SEQUENTIAL OCCURRENCE REPORT REVISeON LEn nt EVENTVEAR REPOR T NO. COOE TYPE NO.

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42 43 CAUSE DESCRIPTION ANO CORRECTIVE ACTIONS h l i l o l B piping support will be added crior to startuo followine the evistina l m Irefueling shutdown. This support will be added between t'eo vn 1 m j ne I g lupstream of the juncture, similar to Unit 1, and will be sufficient to I g l reduce seismic and all other stresses to allowable levels. This dis- I gig Icovery is reportable per IEB 79-14 and in accordance with T.S . 15.6 4.2 $.2.

7 8 9 90 STA S  % POWE R OTHER STATUS DIS O RY DISCOVERY DESCRIPTION y l H l@ l 0l 0 ] 0 l@l N/A l l C l@l IE Bulletin 79-14 Insoection l

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80 LOSS OF OR DAMAGE TO FACILITY Q TYPE OESCRIPTION  %/

Ii 191 7 8 9 LZJ@lto N/A l 80 PU8LICITY DESCRIPTION NRC USE ONLY

• ISSUEO y l N lhl N/A l llllllllllllII 7 8 9 to 68 69 80 3 NAME OF PREPARER C. W. Fay PHONE: 414/277-2811 {

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