05000346/LER-1979-004-03, /03L-0 on 790105:failure to Post Guards at Entrance to Containment During Periods of Free Access. Caused by Personnel Error.Special Order 84 Revised to Require Posting of Guards

/03L-0 on 790105:failure to Post Guards at Entrance to Containment During Periods of Free Access. Caused by Personnel Error.Special Order 84 Revised to Require Posting of Guards

ML19270F380
Person / Time
Site:	Davis Besse
Issue date:	01/31/1979
From:	Green W TOLEDO EDISON CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML19270F377	List: 05000346/LER-1979-004, Forwards LER 79-004/03L-0 05000346/LER-1979-004-03, /03L-0 on 790105:failure to Post Guards at Entrance to Containment During Periods of Free Access. Caused by Personnel Error.Special Order 84 Revised to Require Posting of Guards
References
LER-79-004-03L, LER-79-4-3L, NUDOCS 7902060328
Download: ML19270F380 (2)

LER-1979-004, /03L-0 on 790105:failure to Post Guards at Entrance to Containment During Periods of Free Access. Caused by Personnel Error.Special Order 84 Revised to Require Posting of Guards

Event date:
Report date:
3461979004R03 - NRC Website

text

U.S. NUCLE AR REGULATORY COMMI i e NRC F ORM 366 (7 77)

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8 63 61 DOC AET NUYSER 68 69 EVENT DATE 14 75 REPORT DATE 60 EVENT DESCRIPTION AND PROS ABLE CONSEQUENCES h the unit had not posted a l l o 121 l On 1/5/79 during a review of 10CFR73.55, it was noted that I

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Thic; reoulation I

The incident is being reported in accor-t I was required to be icplemented by May, 1978.

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dance with Technical Specification 6.9.1.9.c.

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TOLED0 ED1 SON COMPA'iY DAVIS-BESSE liUCLEAR POWER STATIO:? U;IT ONE I

SUPPLEME'?TAL INFORMATION FOR LER NP-33-79-05 1

DATE OF EVENT:

January 5, 1979 i

FACILITY: Davis-Besse Unit 1 IDENTIFICATION OF OCCURRENCE: Failure to post guards at the entrance to contain-ment during periods of free access I

Conditions Prior to Occurrence: The unit was in Mode 1

'.th Power (MWT) = 2772, and Load (Gross MWE) = 910.

Description of Occurrence:

On January 5, 1979 at 1030 hours0.0119 days <br />0.286 hours <br />0.0017 weeks <br />3.91915e-4 months <br /> during a review of 10CFR73.55, it was noted that the unit had not posted a guard at the entrance to containment when there was free access to containment when the unit was shutdown, and was therefore in violation of 10CFR73.55(d)(8).

The contaimment personnel hatches are locked above 5% full reactor power and access is controlled by the Shift Foreman.

This regulation was required to be implemented by May, 1978.

Sub-sequent review of the incident' and the Technical Specifications revealed a break-down of administrative controls. The incident is being reported in accordance with Technical Specification 6.9.1.9.c.

Designation of Apparent Cause of Occurrence:

The cause of this occurrence is personnel error. The requirement for posting a gucri during periods of free access to containment was overlooked in the station's revi a of 10CFR73.55.

Analysis of Occurrence: There was no danger to the healthcnd saf ety of the public or to unit personnel.

In order to access containment, personnel had to pass through other entrances which require the same security clearance as containment. Usual practice has been to post guards at the entrance to containment.

There were no other units or systems affected by the occurrence. There were no offsite consequences.

Corrective Action

No immediate corrective action was required. The station was not in violation of Technical Specifications because containment integrity was es-tablished and there was no " free" access to containment when the deficiency was dis-covered.

To prevent recurrence, Special Order 84 was revised to require the posting of guards when there is free access to containment.

Failure Data: luere have been no previous similar occurrences.

LER #79-004 l