ML17318A328
| ML17318A328 | |
| Person / Time | |
|---|---|
| Site: | Cook  |
| Issue date: | 09/24/1979 |
| From: | Dolan J INDIANA MICHIGAN POWER CO. |
| To: | James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| References | |
| AEP:NRC:00265, AEP:NRC:265, NUDOCS 7910150698 | |
| Download: ML17318A328 (3) | |
Text
INDIANA R MICHIGAN POWER COMPANY P. O. 80X 'la BOWLING GREEN STATION N E W YOR K, N. Y. 10004 September 24, 1979 AEP:NRC:00265 Donald C.
Cook Nuclear Plant Units 1 and 2
Docket Nos.
50-315 and 50-316 License Nos.
DPR-58 and DPR-74 IE Bulletin 79-18 Mr. James G. Keppler, Director Officer of Inspection and Enforcement U.S. Nuclear Regulatory Commission Region III Glen Ellyn, Illinois 60137
Dear Mr. Keppler:
This letter responds to your letter of Augu'st 7, 1979 which we received on August 14, 1979 and which transmitted to us the subject Bulletin.
The attachment to this letter contains the written report required by Item 3 of the bulletin..
JED:em Very truly yours, ohn E, Dolan ice President cc:
R.
C. Callen G. Charnoff R.
S. Hunter R.
W. Jurgensen D. V. Shaller Office of Inspection and Enforcement-NRC Washington 4
PDg
ATTACHMENT TO AEP:NRC:00265
To determine the relative audibility of the plant evacuation announcement (PA) system, a complete survey of all accessible plant areas was taken.
An individual stationed in an area judged to be the highest in noise level was paged over the PA system, to determine if the paging call could be heard above the noise.
Each of the plant's 92 PA stations were thus checked.
In some cases, the PA unit's volume control was at its highest setting, yet the call could not be heard.
In these
- cases, additional PA speakers will be installed.
A number of defective PA's were also detected during this survey.
In especially noisy areas, such as between the Unit 1 and 2
- condensers, excessive PA sound pressure levels would be needed to insure audibility of an evacuation announcement.
In these
- cases, a flashing strobe light visual signal will be installed to supplement the PA announcement.
Because of the relatively few number of PA speakers per area, excessive sound levels from each unit are needed at present.
lilith the number of speakers (and PA units) to be added, a more even distribution of sound will result without excessive levels from individual PA speakers.
gl Based on the findings of the plant survey, these specific corrective actions will be taken to ensure that adequate audible/visual evacuation signals exist in all plant areas.
1.
The existing evacuation alarm system shall be expanded to include:
71 additional PA speakers 17 additional PA stations 26 strobe lights in high noise areas Measures have been initiated. to install the above equipment.
2.
A job order has been issued to repair the PA's that were found to be defective during the survey.
IE Bulletin 79-18, Item 4 under actions to be taken by Licensee, states that for all accessible areas, all corrective actions must be com-pleted within 120 days of issuance of this Bulletin.
Every effort will be made to try to meet the bulletin schedule.
With respect to inaccessible
- areas, we plan to perform the Unit 2 survey during the upcoming refueling outage and the Unit 1 survey during the late Spring 1980 refueling outage.
Necessary modifications, based on the results of the survey and the nature of the inaccessible areas, will be completed during the subsequent refueling outages.