ML19317G359

LER 78-010/03L-0:on 780123,security Alarm Sounded an Unauthorized Entry Into Vital Area Through Unlocked Door. Locking Devices on Vital Area Doors Altered.Key Now Needed for Outside Opening.Doors Cannot Be Left Unlocked

ML19317G359
Person / Time
Site:	Crystal River
Issue date:	02/15/1978
From:	Cooper J FLORIDA POWER CORP.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19317G357	List: ML19317G356 ML19317G359
References
LER-78-010-03L, LER-78-10-3L, NUDOCS 8002280957
Download: ML19317G359 (2)

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,oi:,i During nornal operations a secu ty alars notified operations personnel of ,

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SUPPID!ENTARY INFORMATION

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. 50-302/78-010/03L-0 '

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2. Facility: Crystal River Unic #3 -

3. Report Date: 15 February 1978

4. Occurrence Date: 23 January 1978  !

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5. Identification of Occurrence: '

l Vital security door to the battery and 4160 volt ES Bus Switchgear Room was discovered  !

unlocked and is reported in accordance with Technical Specification 6.9.1.9.C.

6. Conditions Prior to Occurrence: j Mode 1 operation.

7. D2scription of Occurrence:

At 1616 a security alarm was received by the control operator of entry into the Battery /4160 volt ES Switchgear Room. Investigation by the Shift Supervisor and the J.

Chief Nuclear Operator disclosed three NRC inspectors and the Officer of the Guard had gained entry into the normally locked space. All personnel were infor:med by the Shif t Supervisor that they had entered a vital area without his knowledge or per:nission.

Further investigation revealed that entry to the vital area was gained through an unlocked security door. Apparently the door had been left unlocked by a previous

( authorized entry. The unlocking device was altered to prevent the door being left in an unlocked condition in order that entry could be nade only with a key.

3. Dasignation of Apparent Cause:

The cause of this event was due to the apparent leaving of the security door unlockad upon a previous entry.

9. Analysis of Occurrence:

There was no safety hazard to the plant or general public as the security alarm notified operations personnel of the unathorized entry and 1:mnediate corrective action was taken.

10. Corrective Action:

Corrective action Work Fequest 10-6455 was initiated to alter the locking devices of all vital area doors to that these doors can only be opened from outside the space by the use of a key. This corrective action was achieved on 27 January 1978 and will preclude recurrence.

11. Failure Data: .

This is the first occurrence of this event.

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