05000000/LER-1986-004-01, Partially Deleted LER 86-004-01:on 860204,loss of Dynamic Reporting of Alarm Surveillance Occurred.Cause Withheld. Computer Svcs Personnel Will Continue to Monitor Sys for Indicators of Cause: Difference between revisions

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{{Adams
#REDIRECT [[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]]
| number = ML20238E709
| issue date = 06/11/1986
| title = Partially Deleted LER 86-004-01:on 860204,loss of Dynamic Reporting of Alarm Surveillance Occurred.Cause Withheld. Computer Svcs Personnel Will Continue to Monitor Sys for Indicators of Cause
| author name = Romberg W, Weekley P
| author affiliation = NORTHEAST NUCLEAR ENERGY CO., NORTHEAST UTILITIES
| addressee name = Starostecki R
| addressee affiliation = NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
| docket = 05000000, 05000245
| license number =
| contact person =
| case reference number = FOIA-87-410
| document report number = LER-86-004-01, LER-86-4-1, MP-9170, NUDOCS 8709150150
| package number = ML20238E403
| document type = LICENSEE EVENT REPORT (SEE ALSO AO RO), TEXT-SAFETY REPORT
| page count = 3
}}
{{LER
| Title = Partially Deleted LER 86-004-01:on 860204,loss of Dynamic Reporting of Alarm Surveillance Occurred.Cause Withheld. Computer Svcs Personnel Will Continue to Monitor Sys for Indicators of Cause
| Plant =
| Reporting criterion =
| Power level =
| Mode =
| Docket = 05000000
| LER year = 1986
| LER number = 4
| LER revision = 1
| Event date =
| Report date =
| ENS =
| abstract =
}}
 
=text=
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On February 4, 1986 at a roximately 1234 hours, th Both Unit 3 Security computers were halted and reb'ooted, but that di not correct the o
Computer Services personnel restored th a roximately 1308 hours the erio en t e system malfunctioned compensator measures
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'saa Millstone Nuclear Power Station Unit 1 o l5 j o l0 lo l2 l 4l5 8l6 0l0l 4 0l1 0l2 0F 0l2 m,-.. %, : ma.c % 2mu., nn Identification Of Occurrence Between 1234 hours and 1308 hours on February 4, 1986 the
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Effects Of Events 1234 hours until 1308 hours on February 4, 1986 a temporary loss of dynamic reporting of alarm activity was experienced.
Description Of Compensatory Measures j
Designation Of Apparent Cause
 
==Corrective Action==
1.
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2.
During a reboot of the system pertinent data necessary to diagnose the v6s lost. Computer Services personnel will continue to monitor t or indicators as to the cause of the problem.
 
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i June 11, 1986 MP-9170 4
Docket No. 50-245 Docket No. 50-336 Docket No. 50-423 Mr. Richard W. Starostecki, Director Division of Project and hesident Programs NRC Region I U.S. Nuclear Regulatory Commission 631 Park Avenue King of frussia, Pennsylvania 19406
 
==Dear Mr. Starostecki:==
This letter forwards an updated report of a security related event pursuant to the requirements of 10CFR part 73, paragraph 73.7)(c).
Very truly yours, i
NORTHEAST NUCLEAR ENERGY COMPANY 0f Wayne D. Ro rg Station Super endent Millstone Nuclear Power Station WDR/LPB:mo
 
==Attachment:==
Report of Security Event 86-004-01 cc: Director of Inspection and Enforcement U.S. Nuclear Regulatory Commission, Washington, D.C.
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}}
 
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