ML20058L214

Ler:On 750110,outboard Main Steam Line Drain Isolation Valve Found Leaking in Excess of Acceptance Criteria for Local Leak Rate Tests.Valve Retested Satisfactory

ML20058L214
Person / Time
Site:	Monticello
Issue date:	02/07/1975
From:	Nolan L NORTHERN STATES POWER CO.
To:
Shared Package
ML20058K743	List: ML20058K737 ML20058L203 ML20058L207 ML20058L214 ML20058L228 ML20058L233
References
LER-LER-750207-02, LER-LER-750207-2, NUDOCS 9105130401
Download: ML20058L214 (1)

Text

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ENSEE EVENT REPORT CONTROL BLOCK:l 9 l l l l l (pLEASE PRINT AL1 REQUIRED INFORMATION) 1 6 LCENSEE LCENSE EVENT Nauf LCENSE NUMBER TYPE TYPE 01 lM lN lMl Nl Pl Il 14 l 0] 0l-l 0l 0l 0l 0l 0l-l 0 l q E5 l4l1l1l1l1[

2S 30 l0 l1 l 31 22 7 89 15 CattGORY T7P s DOCKET NUMBER EVENT DATE REPORT CATE

[c11jccmT l p l nj iTl l Ll l0 l 5 l 0 l-0 l2l

~

_ill.~l~j l 'l :l 0 l ! ~ ' : l 7 8 57 58 59 60 61 68 69 74 75 80 EVENT DESCRIPT:PN gg l hhile performing a local leak rate test the Outboard Main Steam j 7 89 80 32 l Line Drain Isolation valve, MD-2374, was found leakine in excess j 7 89 BO Ql of the acceptance criteria for local leak rate tests. The redundant l 7 89 80 gl isolation valve was operable. Similar c- at occurred during Spring refueling ~

l 80 f cutage 1973. Replace valve (A0 263/75-1).

7 89 mE 80 SYSTEM CAUSE COMPONENT COMPONENT CDDE CODE COMPONENT CODE '~ M A MANUF ACTURE A VOLATON O l Sl Dl lEl l V I A l Ll Yi El 1 Al l AI 3l 9l 5j j Yl 7 89 10 11 12 17 43 44 47 48 CAUSE DESCRIPTION gl NA. Valve too radioactive to inspect. Suspect scratches on seat and gate l 7 89 8 o l 3 inch-600 psi gate valve, pressure seal type, Anchor ' Calve Company, DWG No. 2264-5.0l 7 89 go 1o l Replaced valve and retested satisfactory. l FActuTv METHOO OF STATUS  % POW E A CTrER STATUS CISCO VE AY C'SCOVE Av CE SC A PTION l,1.11J lH l l 0l 01 0l l NA l lBl l NA eg l

7 8 9 10 12 13 44 45 46 ACT IT Y CONTENT AELEASED OF AMOUNT CF AC?rv!TV LOCATION OF AE LE ASE' 12 lE l ALLEASE NA l l lNA l 7 8 9 10 li 44 45 go PERSONNEL EXPOSURES NUMBE R TYPE CESCRIPTION 13 lnl0l0l 7 89 11 U 12 13 l NA go l

PERSONNEL INJUAiES

' .UME E A 1 l010 l 0 j M lfc"~"9CN l 7 89 11 12 60 OFFSiT s CONSEOUENCES 3I 7 89

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ao l

LDSS CA DAMAGE TO FACILITY voE C E SC A *T 'ON 16 7 89 b I NA 10 80 l

UBLICITY

$I 7 s9 9105130401 750210 CF ADDCK 05000263 80 I

ADDITIONAL FACTORS h!

7 89 NA go l

19 } go l

7 89 NAME: L. L. Nolan pgoyg. 612/295-5151 GP f) R81,A67