05000000/LER-1986-021, Partially Deleted LER 86-021-00:on 860911,vital Area Doors Failed to Alarm When Tested During Surveillance.Caused by Failure to Report Door Transactions to Host Computer.Central Procesing Unit Board Replaced
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- e "haC #e.m 304 APPhovt0 OMS NO 31N LICENSEE EVENT REPORT (LER) 85aa's e si to 8ActLify NAutits doc a s t wt a 21 FAGE is Millstone tuclear Power Station thit 1 o i s i o t o I o 1214 15 i lor R vi, L t ...
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roximate hours on 9/11/86 vital area doors fail to ala when es e urin the oor surveillance. Both doors alle g 91 g 3 870910
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'[ * ' , LICENSEE EVENT REPORT (LER) TEXT CONTINUATION .oaovro ove =c vie.co.
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I Identification of Occurrences i
At approximately 0126 h .on 9/11/86 vital area door ailed to '
I alarm when tested. Doo ;
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Effects Loss of alarm surveillance to two vital area doors.
i Description of Apparent Cause il p
The- as not reporting door transactions to t e os and th h st had not failed however, there wa
, u er. communication between the lI l pparently a failure of the[
o the host.
Corrective Action
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NORTHEAST U7ILITIES \ jG'"' "'c '" S * * " S"' 8" " C" n"'at w etm e w e ..t w ac = ='
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September 15, 1986 MP-9495 Docket No. 50-245 Docket No. 50-336 Docket No. 50-423 Mr. Richard W. Starostecki, Director Division of Project and Resident Programs NRC Region I )
U.S. Nuclear Regulatory Commission l 631 Park Avenue l 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, i NORTHEAST NUCLEAR ENERGY COMPANY r ke3.s ,
Wayne D. Roiberg Station Superintendent Millstone Nuclear Power Station WDR/PLW:cjh
Attachment:
Report of Security Event 86-021-00 cc: Director of Inspection and Enforcement U.S. Nuclear Regulatory Commission, Washington, D.C. 20555 M.
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