ML19254A778
| ML19254A778 | |
| Person / Time | |
|---|---|
| Site: | Comanche Peak  |
| Issue date: | 08/06/1979 |
| From: | Seyfrit K NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV) |
| To: | Gary R TEXAS UTILITIES ELECTRIC CO. (TU ELECTRIC) |
| References | |
| NUDOCS 7908160131 | |
| Download: ML19254A778 (1) | |
Text
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UNITED STATES 1'
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NUCLEAR REGULATORY COMMISSION
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REGION IV f
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Gil HYAN PLAZA DHIVE, SUITE 1000 c
d' AH LINGTON, T E X AS 76012 August 6, 1979 In Reply Refer To:
RlV Docket Nos.
50-l.45/IE Bulletin No. 79-18 50-446/IE Bulletin No. 79-18 Texaa Utilities Generating Company ATTN:
Mr. R. J. Gary, Executive Vice President and General Manager 2001 Bryan Tower Dallas, Texas 75201 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,
/
9
- ( /A. [~
Karl V. S yfri Director
Enclosure:
1.
List of IE Bulletins Issued in Last 6 Months 7908160h-
UNITED STATES NUCLEAR REGULATORY COMMISSION OFFICE OF INSPECTION AND ENFORCEMENT WAS!!INGTON, D.C.
20555 IE Bulletin No. 79-18 Date: August 6, 1979 Page 1 of 2 AUDIBILITY PROBLEMS ENCOUNTERED ON EVACUATION OF PERSONNEL FROM HIGH-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.
Whi.le 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 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 ruxiliary building upon observing area.
that other personnel had left, and after calling the control room to inquire if an evacuation had been init.iated. During these occurrences, licensee personnel were not exposed to quantities of radionuclides above regulatory guidance.
Iloweve r, the potential existed for inadver ent a.:recessary exposure of individuals to radioactive materials.
Subsequent to the NRC followup inspection of this oc currence, Florida Power Corporation initiated an assessre -t of this situatic n and performed an engineering evaluation and identi2ied several plant areas where the annun-ciator system needed audibility improvement. The 1 censee has installed a new auxiliary building evacuat ion tone signal and rray add visual alarm indi-cators in areas of very highssoise.
Action to be Taken by the Licensees:
l'o r all power reacto r faH ' i' ' r with a.
u ;m. ' uig itcense:
1.
Determine whether current alarm systems and ev acuation annot.ocement systems are clearly audible or visible througtout all plant areas with emphasis on high-noise areas.
Dete -
made with the maximum anticipated r DUPl.ICATE DOCUMENT Entire document previously entered into system under:
ANO 790fC]O Q03 N o.
of pages:
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