ML19208B806

Forwards RO 77-046 & RO 77-048 Re Svc Water Pump Check Valve Failure & Improper Primary Coolant Low Flow Instrument Settings.W/O Encl

ML19208B806
Person / Time
Site:	Palisades
Issue date:	10/18/1977
From:	Hoffman D CONSUMERS ENERGY CO. (FORMERLY CONSUMERS POWER CO.)
To:	James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML19208B784	List: 05000155/LER-1978-007-03, /03L-0:on 780209,during Routine Test Operation of Emergency Diesel Generator,Unit Tripped on High Water Temp After 25 Minutes of Operation.Caused by Leakage of Cooling Water Pump Shaft Packing Causing Cooling Sys Suction Los 05000155/LER-1978-008-01, /01T-0:on 780215,during Maint of Reactor Depressurization Sys Control Circuitry,Fire Pump Control Switches Inadvertently Placed in Inhibit Position Incorrectly.Control Switches Marked W/Instructions 05000155/LER-1978-010-01, /01T:on 780217,during Review of Electrical Equipment Required for Loca,Steam Drum Low Level Switches Deemed Inadequate for High Temp Environ.Caused by Reactor Protection Sys Not Being Evaluated 05000255/LER-1978-007-01, /01T-0:on 780313,during Sealing of Electrical Connectors Located Inside Containment,Sockets &/Or Sealing Plugs Were Discovered Missing from Connectors.Caused by Connector Holes Not Being Filled During Wiring 05000255/LER-1978-033-01, /01T-0:on 781025,during 15-day Isolation of Waste Gas Decay Tank,Part of Tank Contents Leaked Out.Caused by Faulty Pressure Instrumentation.Instrumentation Recalibr 05000255/LER-1978-040-01, /01X-1:on 781128,during Venting of Waste Gas Surge Tank,Leakage Resulted in Gaseous Release W/O 15-day Holdup Time.Cause Under Evaluation.Rept Will Be Issued by 790105, Not 780105 as Previously Reported 05000255/LER-1978-041-01, /01T:on 781214,dtermined That Insufficient High Pressure Safety Injection Flow Would Be Delivered to Core in Event of Small Break Loca.Caused by Redundant High Pressure Safety Injection Header Being Valved Out of Svc 05000316/LER-1978-026-11, /01T-0:on 780502,during Change from Mode 5 to Mode 4,pumps Became Inoperable When Containment Spray Pump Control Switches in Pull Were in Lockout Position.Caused by Procedural Inadequacy & Personnel Error 05000316/LER-1978-045-03, /03L-0:on 780612,following Addition of Boric Acid to Borated Water Sys,Boron Injection Tank Boron Concentration Found to Be Below Limits.Caused by Chemical Technician Error ML19208B783 ML19208B793 ML19208B794 ML19208B801 ML19208B802 ML19208B805 ML19208B806 ML19208B811 ML19208B814 ML19208B833 ML19208B836 ML19208B840 ML19208B843 ML19208B845 ML19208B848
References
RTR-REGGD-01.016, RTR-REGGD-1.016 NUDOCS 7909210437
Download: ML19208B806 (1)

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31"W a.n.r.: ome..: sin w..e menia.n Av.nw s.ca.on, mense n.ecoi. Ar.. coa. en u-oeso October 18, 1977 Mr James G Keppler Office of Inspection and Enforcement Region III US Nuclear Regulatory Co= mission 799 Roosevelt Road Glen Ellyn, IL 6013T DOCKET 50-255 - LICENSE DPR PALISADES PLluf1' - ER-77-046, ER-77-048 AITD CCRRECTED ER-77-Oh5 Attached are two 30-day reportable occurrences, ER-77-046 and ER-77-Oh8 which relate to a service water pu=p check valve failure and improper primary coolant lov flov instrument settings.

Event Report 77-Oh5 is being corrected to replace i= proper terminology " seal bladder" with the term " seal ring" because the valve in, question does not have inflatable seals.

Event Report 77-048 is being submitted after the 30-day reporting deadline of September 15, 1977 because it was not classified as reportable until October h, 1977 David ? Hoff=an (Signed)

David P Hoff:::an Assistant Nuclear Licensing Administrator CC: ASchwencer, USIiRC 390062 7009210939 IqOkl N 4 I

CORREC'"ED UCENSEE EVENT REPORT Palisades CCNTACL BLCCK:l l

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[pLEASE PRINT ALL REQUIRED INFORMATION) 1 6

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[_O l 91219 l 7 l 7l 7 8 57 58 59 60 61 68 69 74 75 80 EVENT DESCRIPT1CN,,

[alej l Investigation has revealed that loss of the air supp1y to the contain=ent building l

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, E L Purse isol^tio= v^1ves (cv-18o3 -1805, -1e06 -teor, -1813 and -1elh> v111 resu1t i

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$I in deuressurizatien of thh drinesbeh could cause loss of centnin=ent (015]

This failu-a node had not cea d in the FSAR.

Seal tressures are beine SO 7 89 Ql checked once per shift to verify operability of seal ri~ng air supp1y.

(ER-TT-Oh5) l corrected SO 7 89

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$CE COMPONENT CCCE MWECRMR MOLATCN

[CL7J l Sl D l W lVl Al LlVl Ej Xl lCl5 e lT l 7 89 10 11 12 17 43 44 47 48 CAUSE DESCRIPTION Ql The va1ves (Continental Equip /?fpe 9220) are not provided with a redundant air l

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[0jsl l supply to =aintain sea 1 ring pressure. A redundant air source vill be provided as 60 7

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% POWEA CTkER STATUS C

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10 12 13 44 45 48 So b[ED C R E

AMOUNT OF ACTMTY LCCATON CF RELEAst E@

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10 11 44 45 80 PERSONNEL EXPOSURES NUMBER TYPE CESCRPTcN

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80 7 89 11 12 13 PERSONNEL INJUA;ES D

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N/A 14 7 89 11 12 O g rg E0 PROEA3LE CONSEQUENCES s

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80 7 89 I

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LOSS OR DAMAGE TO FAC:LITY D

TYPE CEsCaiPTcN l

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60 7 89 10 b

PUBUC'TY 79/00 3oS38 i

@i N/A 50 7 89 990063 ADOmONAL FACTCAS Jl N/A l

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