ML19254A777
| ML19254A777 | |
| Person / Time | |
|---|---|
| Site: | Waterford  |
| Issue date: | 08/06/1979 |
| From: | Seyfrit K NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV) |
| To: | Aswell D LOUISIANA POWER & LIGHT CO. |
| References | |
| NUDOCS 7908160128 | |
| Download: ML19254A777 (1) | |
Text
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UNITED STATES
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REGION IV
1 NUCLEAR REGULATORY COMMISSION J'
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g ARLINGTON, TE X AS 76012 August 6, 1979 In Reply Refer To:
RIV Docket No.
50-332/IE Bulletin No. 79-18 Louisiana Power and Light Co.
ATTM:
Mr. D. L. Aswell Vice President of Power Production 142 Delaronde Street New Orleans, Louisiana 70174 Gentlemen:
The enclosed IE Bulletin 79-18 is forwarded to you for information. No written response is required.
If you desire additional information regarding this matter, please contact this office.
Sincerely, r
Karl V. Seyfrit DirecLor
Enclosure:
1.
List of IE Bulletins Issued in Last 6 Months 7Y 7908160 a
UNITED STATES NUCLEAR REGULATOPY COMMISSION OFFICE OF INSPECTION AND ENFORCEMENT WASHINGTON, D.C.
20555 IE Bulletin No. 79-18 Date:
August 6, 1979 Page 1 of 2 AUDIBILITY PROBLEMS ENCCUSTERED ON EVACUATION OF PERSONNEL FROM HIGH-NOISE AREAS Description of Circumstances:
In J:inuary 1979, a niunber 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-act.ive noble gases was detected by building monitors within the auxiliary building at. concentrat. ions 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 1icensee'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 lef t, and af ter calling the control room to inquire i f an evacuation had been init.iated.
During these occurrences, licensee personnel were not exposed to quant.ities of radionuclides above regulatory gu; 'ance.
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-ciator system needed audibility improvement.
The licenne has installed a new auxiliary building evacuation tone signal and may alc 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 current alarm systems and evacuation announcement systems are clearly audible or visible throughout all plant areas with empha.=_s on high-noise areas.
Determination in bi h noise areas must be made with the maximum ant.icipated i DUPLICATE DOCUMENT Entire document previously entered into system under:
Ano 77MO30 W3 No. of pages:
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