05000263/LER-1977-026

LER 77-26:on 770911,elbow on F SRV Discharge Line Found Deformed.Caused by Inadequate Restraint on Discharge Line. Addl Support Being Installed to Reduce Displacement of Line. W/771011 Ltr

ML20056B864
Person / Time
Site:	Monticello
Issue date:	10/11/1977
From:	Tobin P NORTHERN STATES POWER CO.
To:	James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
References
LER-77-26, NUDOCS 9102130525
Download: ML20056B864 (2)

LER-2077-026,

Event date:
Report date:
2632077026R00 - NRC Website

text

.

LICENSEE EVENT REPORT s

l l l CONTAOL BLOCCI l l l l (PLEAtt PRWT ALL REQUIRED 19tPORMOTC88) 1 6 NAME UCENSE NUMBER VE TV r

01 l M l N l Ml Nl P l 1 l l 0l Ol-l 0l Ol Ol0 lOl-l Ol0 l l 4 l 1 l Il Il Il l 013l 7 89 14 15 25 26 30 31 32 cATEcony " 7P[ SYu b T ooCRET NUMBER EVENT oAff REPORT DATE O CONT l l l [L_] l_L] l 015 I n l-lo I? I f, I T l l O l 911 l 1171 71 111011_l 117 l 71 7 8 57 $8 59 60 61 68 69 74 7$ 80 EVENT DESCRIPTION gg l DURING A REFUELING OLTTAGE INSPECTION OF THE DRYWELL AN ELBOW ON "F" SRV DISOMRGE I 7 89 80 Bi l LINE WAS EUND DEMRMED. mE U-BOLT SUPPORT AT THIS FT1v1N WAS MISSING. THIS l 7 89 80 0 l EVENT IS NCTT A REPETITIVE OCCURRENCE. 7FF FT PAN AND II-BniT SUPPORT HAVE PFEN l 7 89 < 80 SE l REPLACED. (M-RO-77-26) l 7 89 80 BG l l 7 89 mt 80 c CIDE coupoNENT CooE M R VEAATON BE l ClJ l [, B_J l PlI l Pl ElX lX l [ A_ ] lTl0l3lSl [N_j 7 89 10 11 12 17 43 44 47 48 CAUSE DESCRIPTION O l THE "F" SRV DISCHARGE I TNp FI RrW AND fi-BnTT ArppntTr WFDF TMWCFD ECFMFC WC l 7 89 80 33 l DISORRGE LINE WAS NOT ADEQUATELY RESTRAINED. AN ADDITIONAL SUPPORT IS BEING l 7 99 80 DE l INSTALLED TO REDUCE DISPLACEMENT OF THE LINE. l

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i (Hj l0 l 0 l,01 lNA I LBJ l NA I 7 8 9 10 12 13 44 4S 46 80 afLEILED IF ELIAsf AMOUNT or ACTiv Tv LOCATON or nELE ASE E 9

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10 I x4 I 44 I NA 80 l

7 8 11 45 PERSONNEL EXPOSURES NUMEIER T YPE oESCAPTON 7 89 01 d Ol W 11 12

[ NA 13 50 I

PEASONNEL INJUR:ES NUMBE R DE SC AiPT ON N 1010101 i NA 60 I

7 89 11 12 j OFFSITE CCNSEGUENCES

• I I NA I i 7 8 '4 80 i LCSS DA OAMAGE TO FACIUTY l t v pE DE stam?ON Nk 7 89 10 SO j

l PUBLICIT Y M l NA , ,

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7 89 ADDITIONAL FACTOAS e l N3 "

1 7 69 9102130525 771011 CF ADDCK 05000263 Eh 7 gg%

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• NAME: P. A. Tobin 9 #

PHONE., /295-5151 GPO 881 407 m - .e -y~. , . . _ . , ,

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g g b-. m &us<n t.a u uem mM NORTHERN 5TATES POWER COMPANY M I N N E A PO L.l S . MI N N E S OTA 5 S 4 08 October 11, 1977 p.

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Mr J G Keppler, Director, Region III Cm- O '#

Office of Inspection & Enforcement U S Nuclear Regulatory Cor:rnission .- , e,s,cy;d39,mg g7p 7.}

b 799 Roosevelt Road ^*$7D_ '% C/

Glen Ellyn, IL 60137 I.Q y.

Dear Mr Keppler:

{\.' ' '

MONTICELLO NUCLEAR GENFRATING PLANT Docket No. 50-263 License No. DPR-22 F Safety Relief Valve Discharge Line Degradation The Licensee Event Report for this occurrence is reproduced on the back of this letter. Enclosed are three copies.

Yours very truly, -

)

L 0 Mayer, PE Manager of Nuclear Support Services LQ4/MHV/deh cc: Director, IE, USNRC (30)

Director, MIPC, USNRC (3)

G Charnoff )

MPCA Attn: J W Ferman Enclosure OCI 1 0 1977

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