ML20058L107

Ler.On 750912,during Local Leak Rate test,HPCI-9 Turbine Exhaust Line Check Valve Leaking in Excess of Tech Spec Acceptance Criteria.Caused by Scratched Seating Surface. Seating Surfaces Lapped

ML20058L107
Person / Time
Site:	Monticello
Issue date:	11/11/1975
From:	Grue T NORTHERN STATES POWER CO.
To:
Shared Package
ML20058L058	List: ML20058L055 ML20058L059 ML20058L067 ML20058L074 ML20058L079 ML20058L089 ML20058L105 ML20058L107 ML20058L116
References
LER-LER-751111-07, LER-LER-751111-7, NUDOCS 9105070391
Download: ML20058L107 (1)

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@ lDurirs local leak rate test it was found that HPCI-9 turbine exhaust line check l 7 69 gg h l valve was leaking in excess of Technical Specification accepta ce criteria. Lapped l 7 89 80 EE l seats and retested. Passed local leak rate test. Similar previous events. l 7 89 80 l(A0 263/75-17-7) l 7 69 gg BG I I 7 89 mt 80 t a s'tv cAJEE countwf v cousry.,E v CODI CDDE covp;Nt%' tc .! SJM E L MANJ AC Y;At ;- vo A+os E { e lD l d 7 89 10 11 llA lL l VI Ely l 12 17 hl 43 lA l3 l9 l 5 l

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[Y_j 46 CAUSE DESCRIPTION

$ l Anchor Mfr. Co. 16"-1506 Swinn Check valve. Scratched seating surface found. l 7 89 80 ll l Seating surfaces lapped. l 7 89 80 Ml I 7 e9 eo sa:u , VENDO OF ETA M  % POAIL CNE L STafub D6COstbr D'500VE Af Dt St h!PTION b

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'E9 11 12 13 BD PEASONNEL INJJ AT S N;va A DE5:Lc' ON EE h l010 l lNA l 7 69 li 12 80 DrFS,TE CONSEGUENCES H I KA l 7 89 80 LCSS CA DAMAGE TO FACILITY

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