ML19256B619
| ML19256B619 | |
| Person / Time | |
|---|---|
| Site: | Dresden, Quad Cities, Zion, LaSalle  |
| Issue date: | 08/07/1979 |
| From: | James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| To: | Brian Lee COMMONWEALTH EDISON CO. |
| References | |
| NUDOCS 7908150292 | |
| Download: ML19256B619 (1) | |
Text
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UNITED STATES E'
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GLEN E LLYN, lLLINOIS 60137 AUG 7 1979 Docket Nos. 50-373, 50-374, 50-454, 50-455, 50-456 and 50-457 Commonwealth t.dison Company ATTN:
Mr. Byron Lee, Jr.
Vice President Post Office Box 767 Chicago, IL 60690 Gentlemen:
The enclosed IE Bulletin No. 79-18 is forwarded to you for information.
No written response is requircd.
If you desire additional information rep rding this matter, please contact this office.
I 1
Sincerely, a [N sJames G. Keppler Director Enclosure IE Bulletin No. 79-18 cc w/ encl:
Mr. L. J. Burke, Site Project Superintendent Mr. T. E, Quaka, Quality Assurance Supervisor Mr. R. II. llolyoak, Station Superintendent Mt. Gunner Sorensen, Site Project Superintendent Mr. R. Cosaro, Project Superintendent Central Files Director, NRR/DPM Director, NRR/ DOR PDR Local PDR NSIC TIC Mr. Dean llansell, Office of Assistant Attorney General 0M-790815
4 Accessions No: 7908030403 SSINS No:
6820 UNITED STATES NUCLEAR REGULATORY COMMISSION OFFICE OF INSPECTION AND ENFORCEMENT WASHINGTON, D.C.
20555 August 7,
1979 IE Bulletin No. 79-18 AUDIBILITY PROBLEMS ENCOUNTLRED ON EVACUATION OF PERSONNEL FROM HIGH-NOISE APEAS Description of Circumstances:
In January 1979, a number of licensee personnel were engaged in routine activities in the auxiliary building at the Florida Power Corporation, Crystal River Unit 3 nuclear plant. While these individuals were working in the auxiliary building, in a high-noise (fan) area, an unplanned release of radio-active noble gases was detected by building monitors within the auxiliary building at concentrations which caused the licensee to initiate the facility emergency plan auxiliary building evacuation procedure.
The facility Emer-gency Officer (Shift Supervisor) assessed the monitor readings and initiated an auxiliary building evacuation. The evacuation announcement, made over the licensee's PA system, was not heard by the personnel working in the high-noise Licensee personnel did evacuate the auxiliary building upon observing area.
that other personnel had left, and after calling the contro1.oom to inquire if an evacuation had been initiated. During these occurrences, licensee personnel were not exposed to quantities of radionuclides above regulatory guidance. However, the potential existed for inadvertent unnecessary exposure of individuals to radioactive materials.
Subsequent to the NRC followup inspection of this occurrence, Florida Power Corporation initiated an assessment of this situation and performed an engineering evaluation and identified several plant areas where the annun-clator system needed audibility improvement. The licensee has installed a new auxiliary building evacuation tone signal and may add visual alarm indi-cators in areas of very high-noise.
Action to be Taken by the Licensees:
For all power reactor facilities with an operating license:
1.
Determine whether curre.* alarm systeris and evacuation announcement systems are clearly audiole or visible throughout all plant areas with emphasis on high-noise areas. Dete made with the maximum anticipated n DUPLICATE DOCUMENT Entire document previously entered into system under.
ANO No. of pages:
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