05000000/LER-1986-004, Partially Deleted LER 86-004-00:on 860204,loss of Dynamic Reporting of Alarm Surveillance Occurred.Caused by Malfunction.Computer Svcs Personnel Will Monitor Sys for Indicators as to Cause
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"'"*!.'o',"Ocf'o**~0 LICENSEE EVENT REPORT
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Millstone Nuclear Power Station - Unit 1 o 1s lo to 1o o 7
i lor l012 fif ti 64 Temporary Loss of Dynamic Reporting of Alarm Surveillance tytest Daf t ilt 46 8 NUWel 8 it)
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LICINSE E CoorT ACT FoA TMit Lin liti Na MG T(LtPe4Qht ScutetR Patricia L. Weekley, Security Supervisor anta coot 20,3 4 44 i 4,329 i
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On February 4,1986 at approximately 1234 hour0.0143 days <br />0.343 hours <br />0.00204 weeks <br />4.69537e-4 months <br /> malfunctioned causing ta continued to function and Both Unit 3 Security emputers were ha rebooted but*that co the p len.
Ccmputer Services personnel restored irretel Mng period when the systen mal oned 8709150149 B70910 PDR FDIA WI LL_I A M87-410 PDR wat eere M4
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UCENSEE EVENT REPORT (LER) TEXT CONTINUATION
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Identification Of &xmrrence Between 1234 hours0.0143 days <br />0.343 hours <br />0.00204 weeks <br />4.69537e-4 months <br /> and 1308 hours0.0151 days <br />0.363 hours <br />0.00216 weeks <br />4.97694e-4 months <br /> on February 4,1986 j
2 Effects Of Events 1234 hours0.0143 days <br />0.343 hours <br />0.00204 weeks <br />4.69537e-4 months <br /> until 1308 hours0.0151 days <br />0.363 hours <br />0.00216 weeks <br />4.97694e-4 months <br /> on February 4, 1986 a tenporary loss of dynamic reporting of alarm activity was experienced.
Description Of Ccop3nsatory Measures Designation Of Apparent Cause
Corrective Action
1.
Action has been taken to ensure a field event is a,
rs are aware that 2.
Installation of
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will be pursued. 'Ihis will require a cesign anc is anticipated to be ccmpleted by June 1,1986.
1 3.
During a reboot of the system pertinent data necessary to diagno M Jas lost.
Ccruputer Services personnel will nonitor the for indicators as to the cause of the problem.
Cbrrective action will be evaluated after the review.
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February 7.
1986 i
MP 8675 1
Docket No. 50-245 Docket No. 50-336 i
Docket No. 50.423 l
l Mr. Richard W. Starostecki, Director l
Division of Project and Resident Progra:rs I
NRC Region I U.S. Nuclear Regulatory Corrrnission i
631 Park Avenue King of Prussia, Pennsylvania 19406
Dear Mr. Starostecki:
This letter forwards a report of a security related event pursuant to the requirements of 10CFR part 73, paragraph 73.71(c).
Very truly yours, 1
NORTHEAST NUCLEAR ENERGY CCl@MiY l
A sp 0 t
Wayne D. Ro h g Station Superintendent Millstone Nuclear Power Station WDR/ PIE:ej1 i
Attachttent:
Report of Security Event 86-004-00 1
cc: Director of Inspection and Enforcement U.S. Nuclear Regulatory Cor:rnission, Washington, D.C.
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