ML19257C558

LER 79-041/03L-0:on 791206,during Surveillance Testing of HPCI DCIS-76 & 77,HPCI DPIS-76 Went Downscale After Being Placed Back in Svc.Caused by Technician Error.Signal Reset, Valves Opened & Technician Cautioned

ML19257C558
Person / Time
Site:	Cooper
Issue date:	01/04/1980
From:	Phillips D NEBRASKA PUBLIC POWER DISTRICT
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
Shared Package
ML19257C552	List: ML19257C551 ML19257C558
References
LER-79-041-03L, LER-79-41-3L, NUDOCS 8001290395
Download: ML19257C558 (1)

Text

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NRC F oRM 366 U. S. NUCLE AR REGULATORY COMMISSION (7 7M LICENSEE EVENT REPORT CONTROL SLOCK. l l l l_ l l l (PLE ASE PRINT OR TYPE ALL RECUIRED INFoRMATION) o i lNlE l C l P l RI 14II@l O! 0l !OIOl0lOI- n nl nl@l 1 l LICENSE 1 l 1 lTvilPE1JJ@l l l@

7 8 3 LICENSEE CODE 15 L' CENSE NVvuER 25 2ti bi s A r 38 C ON'T o '

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t, i h3 EVENT OATE ?4 75 D ATE EJ d  % COCK ET NWBE R EVENT DESCRIPTION AND PROB ABLE CONSEOUE*4CES 10 o 2 puring surveillance testing of HPCI- PIS-76 & 77, af ter HPCI-DPIS-76 was placed backl o 3 jin service, it went downscale causing a Group IV isolation of the HPC. System. All l

, ja tredundant core cooling systems were operable. There were. no significa:-t occurrencest in s las a result of this event and there were no adverse af fects to public health and l

!3 i .; pafety. This event is not repetitive. 1

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SY ST E M CALSE C ALSE COYP v4Lvg CCCE CCOE StsCCCE COUPCNENT CODE SL8CCDE SL6CCCE o o [E l F l @ (_A_j @ l C @ l Il Nl Sl Tl mRl Ul@ ]@ W @ 11 4 9 to 11 i .' ?J

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ACTION FUTLAE EF5ECT SHuTOCWN A TT AC wM E N T NsR D-4 PRIME COMP COMPONENT TAKEN ACTION ON PLANT VETHOD "OyRS .4 SU8MITTED FCHMdVB SU PPLI E R VANUFACTLRER LEJ8LZJ@

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CAUSE CESCRIPTioN AND CORRECTIVE ACTIONS

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i i lback in service allowing the system line-up to be restored before the instrument j i jwas operating properly. The instrument was removed from service, the isolation sig1 i i ]nal was reset and the isolation valves were reopened. The technician was cautioned l i A to use proper care ahen placing instruments back in service. I g 3 80 STA S . POWER OTHER STA TUS ISCOV F OiSCOV ERY OESCRtPTION 1 5 (I,j@ l1 l0 0l@ NA 44 I LAJ@lonerational event durine surv. Tese 1 9 9 10 17 11 4S 46 80 AC riviTY CONTENT RELEASED OF RE LE ASE AMOUNT OF ACTIVITY LCCATION OF FELE ASE 1

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< g '; in ta d 64 80-3 NAME OF PR'_P ARER David Phillips ps c,,y 402-825-3811 2 4 001590 %f