ML20096C709
| ML20096C709 | |
| Person / Time | |
|---|---|
| Site: | Callaway  |
| Issue date: | 08/09/1984 |
| From: | Schnell D UNION ELECTRIC CO. |
| To: | James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| Shared Package | |
| ML20096C703 | List: |
| References | |
| CAL, ULNRC-890, NUDOCS 8409050381 | |
| Download: ML20096C709 (2) | |
Text
1 UNION ELECTRIC COM PANY
' 3 908 GRATIOT STREET ST. Louis, MisscURI nowaun w. =CHNELL O. SOM 949 August 9, 1984 et Lou =. = = =ou m== i..
m......,
Mr. James G. Keppler Regional Administrator U.S. Nuclear Regulatory Commission Region III 799 Roosevelt Road Glen Ellyn, IL 60137 ULNRC-890
Dear Mr. Keppler:
UNAUTHORIZED OPERATIOli OF PLANT EQUIPMENT CALLAWAY PLANT DOCKET NUMBER 50-483 Ref:
Confirmatory Action Letter dated July 6, 1984 This letter addresses the NRC concerns stated in the referenced letter to Union Electric.
A thorough investigation has been conducted in regard to the July 4, 1984 incident.
The most probable cause appears to be an intentional act of malicious mischief in the unauthorized opening of circuit breakers.
The act resulted in a loss of power to three radiation monitors resulting in the isolation of the control room ventilation and containment purge systems.
Our investigation included interviews of fifty-nine people who were initially indicated by our computerized personnel access log to have had access to the general plant area.
None of the initial interviews was conclusive.
Thirty-five of these people were subsequently removed from further consideration because their individual card / key transaction records indicated they could not have been in the specific area at the time.
The remaining twenty-four people were re-interviewed and all sub-QnN mitted to fingerprinting for comparison with fingerprints taken l
from the breaker panel in question.
Neither the re-interviews gg nor the fingerprinting yielded any clue as to the identity of e5 the individual.
i i
en t
v When the investigation proved inconclusive, Union b
Electric instituted corrective actions in an effort to prevent recurrence of this type of act.
Access rontrols in the form
$4 of the computerized card / key system, hard key issuance and og temporary barriers have been instituted for rooms in the In.o UNION ELECTRIC SAFEGUARDS INFORMATION PER 10 CPR 73.21 WITHHOLD FROM FUBLIC DISC:.OSUF.E REMOVAL OT ENCLOSURES EXEMPfS LETTER FROM APO%E REQULIEMENTS
- 4 Mr. James G. Keppler Page 2 August 9, 1984 auxiliary building which contain sensitive equipment and which would be susceptible to this type of incident.
Sensitive rooms in other buildings have been reviewed and have appro-priate monitoring in place.
Additionally, I have issued a letter to personnel with unescorted access reminding them of the potential consequences and civil or criminal penalties for acts of this type.-
A detailed progressive investigation report regarding this issue as well as the associated Licensee Event Report are attached for your review.
Should you have any further questions, Messrs. G. R. Pendergraff, Superintendent-Security, or P. T. Appleby, Assistant Manager, Support Services, were involved in the investigation and are available to provide any required assistance.
Very truly yours, Donald F. Schnell DFS/RLP/bjp cc:
W. L. Forney, NRC Region III NRC Resident Inspectors, Callaway Plant (2)
Missouri Public Service Commission J. R. Creed, NRC Region III i
l l
UNION ELECTRIC l
EAEEGUARDS INFORMATION PER 10 CFR 73.21 WITHHOLD FROM PUBLIC DISCLOSuliC l
BEMOVAL OF ENCLOSURES EXE!.FTS LLTTER l
FROM AfsOU REQUIREMENTS
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