ML19309H127

LER 80-031/03L-0:on 800406,shift Supervisor Determined That Weekly Test ST 5080.01,independent Offsite Ac Sources Lined Up & Available Failed to Meet Surveillance Requirements When Late Date 800401 Was Missed.Caused by Personnel Error

ML19309H127
Person / Time
Site:	Davis Besse
Issue date:	05/02/1980
From:	Stolz J TOLEDO EDISON CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML19309H126	List: ML19309H125 ML19309H127
References
LER-80-031-03L, LER-80-31-3L, NUDOCS 8005080476
Download: ML19309H127 (3)

Text

U, S. NUCLE AR H E@ULOV@LT7 L4CJWIC NRC FOHM 36G (7 771 ,

LICENSEE EVENT REPORT 8005080

(% CONTROL BLOCK: l l l l l l l (PLE ASE PAINT OR TYPE ALL REQUIRED INFORMATION) d I e l l@

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[o Til 7 8 9 l 0 l H l D LICENSEE CODE l

B l14 S l13 1 l@l 0 l 0 l 0 LICENSE l 0 NUMbEH l 0 l 0 l 0 l 25 @ 26 l 0 LICENSE l 0 l 0 TYPEl@lJO 4$7lCA1 1 58 1 l 1 l 1 l@

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Zn"c[ l L l@l 0 l 5 l 0 l - l 0 l 3 63l 4 l EVENT t,0 61 DOCKET NUMBER 68 6 @l DATE 0 l 4 l 0 l 6 l 8Ml01510 l 2 l 8 l0 74 75 REPORT DATE 80 EVENT DESCRIPTIOrJ AND PRO (IABLE CONSEQUENCES h f5T lI(NP-33-80-37) On 4/6/80 the Shift Supervisor determined that the weekly test ST 5080.0J.

l o 3 l Independent Off-Site AC Sources Lined Up and Available had missed its late date on The next test was not run until 4/3/80 at 0930 hours0.0108 days <br />0.258 hours <br />0.00154 weeks <br />3.53865e-4 months <br />. This l o 4 l4/1/80 at 0030 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br />.

o 3 l meant the station had not met the Surveillance Requirement 4.8.1.1.1.a even with the l o s [ allowable stretch applied. There was no danger to the health and safety of the publicl 0 7 lor to station personnel. The tests run 4/3/80 and 4/6/80 again confirmed the off- l l

p l site AC sources operable. 80

$ BC E COMPONENT CODE SUB O'E $ E DE CODE 7

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[H 33 jgl34 11l@ 35 36 37 40 41 42 43 44 47 CAUSE DESCRIPTION AND CORRECT'VE ACTIONS h

O lThe cause was an error made when updating the computer test history. The test done l l

i i l3/23/80 was never entered into the computer. When the new schedule was printed out The Shift Supervisor knew

, 2 jof the computer, it still showed the 3/23/80 test as due. l Therefore, the next test!

g l this test had. been completed and marked it of f the schedule.

E 1never showed sp. The duties have been reviewed with the new Surveillance Test Engineet.

7 8 9

% POWE R OTHER STATUS DIS O Y DISCOVERY DESCRIPTION STA s t 5 ( E_jh l0 l 7 l 3 l@l NA l W @l Shift Supervisor log review l AENVfTY CO TENT AMOUNT OF ACTIVITY LOCATION OF RELEASE RELEASED OF RELEASE NA l I 6 h [_7_jh ! NA "

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. 7 8 9 LOSS OF OR DAMAGE TO FACILITY TYPE DESCRIP TION l

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DESCRIPTION 2 a tssVEI81 Ln NA' l lllllll1ll lll5 68 69 80 ;

7 8 9 to DVR 80-055 NAME OF PREPARER Jan C. StotZ PHONE:

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- s TOLEDO EDISON COMPANY DAVIS-BESSE NUCLEAR POWER STATION UNIT ONE SUPPLEMENTAL INFORMATION FOR LER NP-33-80-37 DATE OF EVENT: April 6, 1980 FACILITY: Davis-Besse Unit 1 IDENTIFICATION OF OCCURRENCE: Independent Off-Site AC Sources Lined up and Availabic, ST 5080.01, was Missed Conditions Prior to occurrence: The unit was in Mode 1, with Power (MRT) = 2024, and Lord (Gross FME) = 647.

Description of_0ccurrence: On April 6, 1980, the Shift Supervisor was reviewing the computer printed surveillance test schedule and could not find an entry for a weekly test, ST 5080.01, Independent Off-Site AC Sources Lined Up and Available, which is normally run on Sundays. When reviewing the Unit Log, he found that this test had not been run between March 23, 1980 at 0430 hours0.00498 days <br />0.119 hours <br />7.109788e-4 weeks <br />1.63615e-4 months <br /> and April 3, 1980 at 0930 hours0.0108 days <br />0.258 hours <br />0.00154 weeks <br />3.53865e-4 months <br />.

Using the Surveillance Requirement 4.0.2 frequency criteria, the late date passed on April 1, 1980 at 0030 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br />. This meant the station had missed the Surveillance Rcquirement 4.8.1.1.1.a which requires the o't-site AC sources to be determined operable at least once per seven days by verifying correct breaker alignments and indicated power availabilities. The test was run again on April 6, 1980 and again l varified the sources operable.

Designation of Apparent Cause of Occurrence: The cause of the occurrence was an error mtde when updating the computer test history. The test run March 23, 1980, was pro-cessed through the Technical Section where it was recorded in a log book. Houever, it was missed when the completed test information was updated into the computer. When thm next schedule was printed up, the test due March 23 continued to show up as due.

The computer program will not call for a March 30 test until the test done March 23 h o been entered as complete. When the Shift Supervisor saw the March 23 test on the cchedule, he knew from checking the ir.ic log that it had already been done, and he -

crossed out this entry.  ;

This error went undetected during.a time that the Surveillance Test Engineer's duties ,

wzre being turned over to a new individual. Also, the Surveillance Test Engineer's  ;

ctudent assistant had just started the previous week.  ;

I Anelysis of Occurrence: There was no danger to the health and safety of the public or to station personnel. The test was performed only two days late, and when done, it has c nsistently shown the off-site AC sources to be operable.

i Corrective Action: The test has been performed on' April 3 and 6, 1980, since the missed.

to:t and again confirmed AC offsite sources to be operable. The duties of the Surveil-Icnce Test Engineer have been reviewed with the new Surveillance Test Engineer and the tew student assistant to ensure the computer schedules are more closely checked and errors c:rrected before they become significant.

LER #80-031 y

TOLEDO EDISON COMPANY '

DAVIS-BESSE NUCLEAR POWER STATION UNIT ONE SUPPLIMENTAL INFORMATION FOR LER NP-33-80-37 PAGE 2 Failure Data There have been no previously reported missed surveillance tests due to a test scaeduling error.

LER #80-031 e

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