ML19344D372
| ML19344D372 | |
| Person / Time | |
|---|---|
| Site: | Oconee  |
| Issue date: | 12/14/1979 |
| From: | Parker W DUKE POWER CO. |
| To: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| Shared Package | |
| ML19344D369 | List: |
| References | |
| NUDOCS 8003120214 | |
| Download: ML19344D372 (3) | |
Text
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DUK E POWElf COMI'ANY PowEn Ilt lLDINO 422 Sot 1TH CHUNCH STurr.T. CHAHU)TTE, N. C. 3:82 W ffn 17 w n u a o
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3?3 4Ce3 Mr. James P. O'Reilly, Director U. S. Nuclear Regulatory Commission Region II 101 Marietta Street, Suite 3100 Atlanta, Georgia 30303 Re: RII:CMH 50-269/79-25 50-270/79-23 50-287/79-25
Dear Sir:
With regard to your letter of November 21, 1979 which transmitted the subject report, Duke Power Company does not consider the report to be proprietary.
Please find attached our response to the cited item of noncompliance.
Very truly yours,
[
f William O. Parker, Jr.
WM KRW:scs Attachment
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DUKE PO'n'ER COMPANY 6
OCONEE NUCLEAR STATION
.g Response to IE Inspection Report 50-269/79-25, -270/79-23, -287/79-25 ITEM As required by 10 CFR 20.203(c)(2), each entrance or access point to a high radiation area shall be maintained locked except during period when access to the area is required, with positive control over each individual entry.
Contrary to the above, on October 11, 1979, the door leading to Room 251 (De-borating Domineralizer Hatch Area) was found unlatched. The radiation 1cvel in accessible areas inside this room was 250 mR/ hour.
Positive control over each individual entry into the room was not in effect.
This is an infraction.
Similar items were brought to your attention in our letters dated September 10, 1979, December 12, 1978, and October 18, 1978.
RESPONSE
The following inspection reports (numbers abbreviated) have dealt with centrol of access to high radiation areas:
77-22, -22, -22; 78-07, -07, -07; 78-12,
-11, -11; 78-20, -20, -21; 78-27, -26, -27; and 79-20, -18, -20.
Although previous corrective actions have improved access control significantly, these actions have not proven to be totally effective.
Therefore, new corrective actions will be taken in several different areas.
To help ensure positive control over high radiation areas which are barricaded with locked doors, the following steps have been taken:
1.
Health Physics personnel are making at least one survey per shift to inspect the high radiation area doors.
2.
All high radiation area doors have been placed on a preventative maintenance schedule to ensure proper operation.
3.
All high radiation area doors have been adjusted to close and lock when released (assuming no obstruction in the doorway or closing mechanism).
In addition to the steps listed above, the following measures are being evalua-
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ted to resolve instances of the doors closing but not lo.cking:
1.
The door closer mechanism can be adjusted to exert greater clos-ing strength for any door position. The latch striker plate hole can also be enlarged to provide a greater area of latch engage-ment.
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2.
A local battery operated alarm for each door can be fitted with a
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remote switch actuated by the latching mechanism. This would pro-vide a time-delayed alarm if the door was not latched properly.
There are several disadvantages to this approach, including (a) procurement of a suitable remote switch, (b) modification of the alarms to allow a time delay before sounding with a limited time delay (forty-five seconds) available, (c) high battery drain of
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h the alarms with the resulting large maintenance expense, and (d) excessive loudness of the alarns for personnel in the im-mediate area.
A centrally located panel with alarm lights can be installed.
The'11ghts would be actuated by the latch mechanism as in Item (2) above.. A switch suitable for this application is current-ly available. This alternative is the most expensive to impic-ment but also probably the most reliable.
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