ML20058L203

Ler:On 750115,both Core Spray Testable Check Valves AO 14-13A & AO 14-13B Found Leaking in Excess of Acceptance Criteria.Caused by Accumulation of Scale on Seating Surfaces.Valve Seats Cleaned & Retested Satisfactorily

ML20058L203
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, NUDOCS 9105130389
Download: ML20058L203 (1)

Text

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1ENSEE EVENT REPORT CONTROL BLOCK;l l

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(PLEASE PI UdT ALL REC.llRED INFORMATION) 1 6

LCENSE E LCENt*

EVE NT NAME LCENSE NLNBER TYPE TYPE i

lM INl Ml % Pl ll l0 l 0 l-l 0 l 0l 0l 0l 0l-l 0 l 0 l l4 11 % l 'l 1l l0 l1 l 01 15 25 26 30 31 32 l

7 89

+

CATEGORY TvP SU DOCKET NUMBER EVENT DATE REPORT C A TE

!OI1!CCtrT ! n i n l T'

' Li t o i 5101 1012 ' 6131 l C11 11 l5!7l 5l l0 l2JOj717l51 7 8 57 68 59 60 61 68 69 74 75 80 EVENT CESCRIPTION gl While perfoming local leak rate tests both Core Spray Testable Check Valves I

7 89 80 gi A0 14-13A ani A0 14-13B werL found leakine in excess of the l

1 7 89 Ql acceptance criteria. The redundant palation j

7 89 e

@l valve was oi,erable.

C i-il n" event.5Lymrred Anri' g -i'~

7 89 06 l m,c,m3;n.

Ottt ac ec. 1973 nnd 1974 -

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7 gg 80 SYSTEM CAUSE MWNENT COMPONENT CCOE CDDE COMPUNE' s..

SUPPUER MANUFACQDER

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CAUSE DESCA!PTION g L Failed leak test due to accumulation.i scale on seatint surfaces.

l 7 8E 80 DE L >, inch Tilting Disc Check Valve, Rockwell Mfg. Co. Fig. 770 (CFSM) J3 FAY l

i 7 89 80

@l Cleaned valve seats and retested satisfat.rv.

l F ACILil Y VETHOD OF status

% DO A E A OTHln ST.TUS CISCCJEAv DISCOVE RY DESCA:P T ON 010 9!

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10 12 13 44 45 46 80 1... M OF ACTMTY CONT E NT T4E LEASf D OF PELEASE AMCmNT OF ACT TT v CC AT;ON CF AELE ASE

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1 44 45 60 EASONNEL.AOStHES NUMBER T YPE DESCRIPTION O

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11 12 13 90 PEASONNEL INJUA!ES NUVHE A DE SC AiPT ON fG110!0101 1

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7 89 11 12 80 OFFSITE CONSCOUENCES hl NA 7 89 LOSS OR DAMAGE TO FACIUTy 60 Tvo!

CE SCniPT ON 1l6 Wl NA l

7 89 10 BO PUBUCITY f;Ti} l lA 4 ~ :s 9 9105130389 750210 l

CF ADOCK 05000263 30 ADDITIONAL FACTORS CF 3 I I'A

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NAME:

L. L. Nol an 80

_,_ pgang 612/295-5151 GPO 8101. e 6 7