ML19340E260

LER 80-031/03L-0:on 801207,during Normal Operation,Leak Developed in Weld Connecting Demineralized Water Flush Line to Discharge Manifold of Charging Pump.Caused by Probable Piping Vibration.Crack Repaired & Pump Returned to Svc

ML19340E260
Person / Time
Site:	Fort Calhoun
Issue date:	12/17/1980
From:	Tesarek J OMAHA PUBLIC POWER DISTRICT
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
Shared Package
ML19340E257	List: ML19340E256 ML19340E260
References
LER-80-031-03L, LER-80-31-3L, NUDOCS 8101060769
Download: ML19340E260 (4)

Text

{{#Wiki_filter:._._ m_ _ _ . _ m . _.m _____ _ _ _ - . . ._..~____m _ _ _ m _ _ _ _ _ - - . . . - _ _ . . _ ___m__ _ . . _ _ . NRC FORM J66 U. S. NUCLE AR REGUL ATORY COMMISSION i LICENSEE EVENT REPORT ] CONTROL BLOCK: l l l l l l lh (PLE ASE PRINT OR TYPE ALL REQUIRED INFORMATION) j lo lil IN l E l F l C l S l 1 l@l 010 l010 lo lo lo 10 lo l0 lo26 l@l4 26 l1LICEN5E Il 11TD l1 PE JO l@lb 7 L Al 1 t>8l@ j 7 8 9 LICENSEE CODE 14 15 LICEN5t NuvutM j CON'T O i S$RU LL_j@l 015101010121815 68 l@ll 69 1210171810 l@ll 1211171810 14 75 REPORT D ATE 80 l@ 7 8 60 61 DOCKET NUVSER EVENT DATE j EVENT DESCRIPTION AND PROBA8LE CONSEQUENCES h FOTTI I During normal operation. a leak develooed in the weld which cnnnects the demine - l I 10131 I alized water flush line to the discharge manifold of Charoina Pumo CH-1B. Charoino i f

IOI4II oumos CH-1 A and CH-lC were coerable. therefore the reouirements of Technical Soeci- 1 l l0is1 I fication 2.2 were met. A similar event is described in LER 78-021. I 4

[T171 1 I ) 10131 1 l i I I 1 10 l s 1 I 80 7 es SYSTEM CAUSE CAUSE COYP. VALV E CODE CODE SUSCODE COMPONENT CODE SU8 CODE SUSCODE l0lsl l Pl Cl@ [Lj@ lC l@ l Pl Il Pl El Xl XI@ [Aj@ W @ 19 20 7 8 9 10 11 12 13 18 i SEQUE NTI AL OCCURRENCE REPORT REVISION EVENT YEAR REPORT NO. CODE TYPE N O. L

@ ,a=E R RO

_ 21 18 10 I 22 l-l 23 10 13 11 I 24 26 Ld 27 10131 28 29 W JO L-] 31 lo_! 32 , , T K N A ON C N PL NT MET HOURS S8 IT FOR 8. SUPPL R MA F CTURER l3J@lLJ@ LLJ@ LLj@ 10 10 10 10 I Ly_J@ l_nJ@ LAJ@ Lt 19 19 1947l@ i 33 34 35 36 31 40 41 42 43 44 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS h li10i l The probable cause of the weld leak was piping vibration. The crack in the weld I j ii iii I was repaired and charging pump CH-1B was returned to service. An engineering I l i, ,,i 1 evaluation is being performed on the problem of vibration of the flushing line I i,i3i l (EEAR FC-80-89). I I LuaJ8 9l 7 80 STA S  % POWER OTHER STATUS DIS O RY DISCOVERY DESCRIPTION Ii I s l [E_j@ l 017 l 5 l@l NA l W @l** Operator Observation l ACTIVITY CO# TENT AELE AEED OF HE LEASE AMOUNT OF ACTIVITY LOCATION OF RELEASE LLLcj Lz_J @ LLJ@l NA l l NA 80 I 7 8 9 to 11 44 45 i PERSONNEL E XPOSURES i NUV8 E H TYPE DESCRIPTION i i 10 10 10 l@Lz_j@l NA l PERSONNi L i.uu'n'iES l NuveE a OtSCn. prion @ I i - NA l 7 8 9 10 10 10 18I12 11 80 LOSS OF on DAVAGE TO F ACILITY TYPE DESCRIPflON i 9 [7_j@l NA l 7 8 9 10 80

                                      '"                                                                                                                                                     NRC USE ONLY                    ,

, 2 o dl ISSui"@Et5CaiPT.ON NA 7 @ 810106o l [[lllllllllllj 7 a 9 10 sa 69 80 5 J0hn J. Tesarek pgong: 402-426-4011 { NAYE G{ PREPARER

LER No. 80-031 Omaha Public Power District Fort Calhoun Station Unit No.1 Docket No. 05000285 Attachment No. 1 Safety Analysis During normal operation, a leak was observed in the weld which con-nects the demineralized water flush line to the discharge manifold of Charging Pump CH-18. Charging pumps CH-1A and CH-1C were operable during the time that CH-1B was recoved from service for repair of the weld, therefore, the requirements of Technical Specification 2.2 were met. There was no significant radiation exposure to plant personnel or activity released. 1

LER No. 80-031 Omaha Public Power District Fort Calhoun Station Unit No.1 Docket No. 05000285 Attachment No. 2 Corrective Action M.0. 8098 was initiated to repair the weld which connects the Jemineralized water flush line to the discharge manifold of Charging Pump CH-1B. The weld crack was ground out and the area was rewelded. The weld was dye penetrant checked and hydrotested. Charging pump CH-1B was then returned to service. An engineering evaluation is being performed on the problem of vibration of the demineralized water flush line (reference EEAR FC 89). I i 1 L

LER No. 80-031 Omaha Public Power District Fort Calhoun Station Unit No.1 Docket No. 05000285 Attachment No. 3 Failure Data A previous related incident is detailed in LER 78-021. .}}