ML19256B621
| ML19256B621 | |
| Person / Time | |
|---|---|
| Site: | Midland |
| Issue date: | 08/07/1979 |
| From: | James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| To: | Howell S CONSUMERS ENERGY CO. (FORMERLY CONSUMERS POWER CO.) |
| References | |
| NUDOCS 7908150344 | |
| Download: ML19256B621 (1) | |
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UNITED STATES
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AUG 7 1979 Docket No. 50-329 Docket No. 50-330 Consumers Power Company ATTN:
Mr. Stephen 11. Howell Vice President 1945 West Parnall Road Jackson, MI 49201 Gentlemen:
The enclosed IE Bulletin No. 79-18 is forwarded to you fo information.
No written response is required.
If you desire additional information regardin.g inis matter, please contact this of fice.
Sincerely, w 0.
gJames G. Keppler Director
Enclosure:
IE Bulletin No. 79-18 cc w/ enc 1:
Central Files Director, NRR/DPM Director, NRR/ DOR PDR Local PDR NSIC TIC Ronald Callen, Michigen Public Service Commission Dr. Wayne E. North Myron M. Cherry, Chicago 7 908150 37f.
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. 79-19 AUDIBILITY PROBLEMS ENCOUNTERED ON EVACUATION OF PERSONNEL FROM HIGB-NOISE AREAS 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, r ade ever 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 af ter calling the control room 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 c.nd 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 (vacuation tone signal and may add visual alarm indi-cators in areas of very high-noise.
Act!.on to be Taken by the Licensees:
For all power reactor facilities with an operating license:
1.
Determine whether current alarm systems and evacuation announcement systems are clearly audible or visible throughout all plant areas with emphasis on high-noise areas. Determination in high noise area made with the maximum anticipated n DUPLICATE DOCUMENT Entire document Previously entered into system u r:
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