05000263/LER-1977-031

LER 77-31:on 771013,noted Torus Internal Catwalk Sections Not Attached in Same Manner.All Locations Will Be Upgraded to Design Requirements Prior to End of outage.W/771027 Ltr

ML20056B862
Person / Time
Site:	Monticello
Issue date:	10/27/1977
From:	Goranson R, Mayer L NORTHERN STATES POWER CO.
To:	James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
References
LER-77-31, NUDOCS 9102130514
Download: ML20056B862 (2)

LER-2077-031,

Event date:
Report date:
2632077031R00 - NRC Website

text

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LICENSEE EVENT REPORT s

CCNTACL ScOCK l l l l l l l (PLEA E PZIOT *LL CElulRE*J CFCCM ATKC) 1 6

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. ! UCENst NuvBla y E T FE D1 l M! N l M l Nl P ! 1 l 7 89 14 l0l0l-l0l0l0lDi l-l0 l 0 25l 15 l4 l 1 l1 l Il 1l l0l1l 26 33 31 32 ca'!;Cov [.3[ sb[E$ CCC(ET NUMBE A EVENT OaTE REPOAY CatE

@ CON'T l l l W lLl 10l 5 l 01-l 0 l2 l 6 l3 l l Il Oil l 3l 7 l 7l l 1l0 l 2 l 7l 7l7 l 7 8 57 58 59 60 61 68 69 74 75 80 EVENT DESCA;PTION 95 l During inspection, noted torus internal catwalk sections not attached in same j 7 89 80

$ l manner. Review of drawings revealed recuirement for weld and bolt at attachment l 7 89 60

@l locations. Of 64 locations, 2 neither bolted nor welded, 2 welded only, 2 bolted j 7 89 BO BE I and welded, and remaining bolted only. All locations will be upgraded to design l 7 89 60

@l requirement prior to end of current outage. Not repetitive occurrence.(M-RO-77-311 7 89 pu,ug 80 bot c[rE covooNENT COOE S R M Ur[C sA vouTON I S I Al L1] IV l ElS l SI ElL l lNl lC l3 l1 l 0l [NJ 7 89 10 11 12 17 43 44 47 48 CAUSE DESCRIPTION

. BE [ Welds and bolts were omitted during original construction of torus. GE Mark I l 7 89 B0 l Containment. All locations will be upgraded to design requirements prior to end l 7 89 go hl of current outane. l s acot- VE f MOD OF Status

• PGAIA DTwtA Status D'sCCa t Av D'SCChiav CE SC A PTON 1

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7 8 10 11 PEASONNEL EXPOSUAES Nuveta Tot CEstnetcN DE I 010101 lij l ^ l 7 89 11 12 13 60 PE ASONNEL :N.;uA:ES Novela ot scswt:cs 50 1010 101 I :n 80 I

7 89 11 12 OFFSITE CONSEQUENCES Ql 7 89 JA 80 l

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ADDITIONAL FACTCAS '.h i 00 l ~ NA l 80 9102130514 771027 63 gg l CF ADOCK 050 7 , 8, 9 ,

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,. . nayq Richard Goranson PHONE 612/295/5151

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October 27, 1977 7 '#E.',.

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, ., s Mr J G Keppler, Director, Region III Office of Inspection and Enforcement U S Nuclear Regulatory Com:nission 799 Roosevelt Road Glen Ellyn, IL 60137

Dear Mr Keppler:

!ONTICELLO NUCLEAR GENERATING PLANT

, Docket No. 263 License No. DPR-22 J

Torus Internal Catwalk Construction Deficiencies The Licensee Event Report for this occurrence is reproduced on the back of this letter. Enclosed are 3 copies.

Yours very truly,

, L 0 Mayer, Manager of Nuclear Support Services IDM/LLT/ak cc: Director, IE, USNRC (40)

Director, MIPC, USNRC (3)

G Charnoff MPCA - Attn: J W Feman

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