05000296/LER-1982-008, Forwards LER 82-008/03L-0.Detailed Event Analysis Encl

Forwards LER 82-008/03L-0.Detailed Event Analysis Encl

ML20052H491
Person / Time
Site:	Browns Ferry
Issue date:	04/29/1982
From:	Green H TENNESSEE VALLEY AUTHORITY
To:	James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML20052H492	List: 05000296/LER-1982-008, Forwards LER 82-008/03L-0.Detailed Event Analysis Encl 05000296/LER-1982-008-03, /03L-0:on 820331,while Performing Daily Source & Background Check of CAM-390-250,reactor & Turbine Bldg Vent Monitor,Inlet Sample Line Discovered Disconnected.Caused by Personnel Error.Sample Lines Reconnected
References
NUDOCS 8205210131
Download: ML20052H491 (2)

LER-1982-008, Forwards LER 82-008/03L-0.Detailed Event Analysis Encl

Event date:
Report date:
2961982008R00 - NRC Website

text

, _ -

(

TENNESSEE VALLEY AUTHO Pf@g p,,,

• k, CH ATTANOOGA. TENNESSEE 374ol 1750 Chestnut Street Tower I I i MAyg gN: 03 April 29, 1982 Mr. James P. O'Reilly, Director U.S. Nuclear Regulatory Commission Office of Inspection and Enforcement Region II 101 Marietta Street, Suite 3100 Atlanta, Georgia 30303

. Dear Mr. O'Reilly:

TENNESSEE VALLEY AUTHORITY - BROWNS FERRY NUCLEAR PLANT UNIT 3 - DOCKET NO. 50-296 - FACILITY OPERATING LICENSE DPR REPORTABLE OCCURRENCE REPORT BFRO 296/82008 The enclosed report provides details concerning the inadvertent disconnection of the inlet sample line to a building ventilation continuous air monitor.

This report is submitted in accordance with Browns Ferry unit 3 Technical Specification 6.7.2.b(2).

Very truly yours, TENNESSEE VALLEY AUTHORITY

(

. J. Green irector of Nuclear Power

' 7, Enclosure cc (Enclosure):

Document Control Desk U.S. Nuclear Regulatory Commission Washington, DC 20555 Records Center Institute of Nuclear Power Operations 1820 Water Place

_ Atlanta, Georgia 30339

- NRC Inspector, Browns Ferry QYN'f.

Yx".1 h s

8205210131 820429 F'DR ADOCK 05000296

//

O PDR An Equal Opportunity Employer u_

, Tennen:a e Va!! y Authority 7

. Brown:; r,erry f.uclear Plant Form BF 17 BF 15.2 2/12/82

?

LEP S' PPLIDIENTAL INFORMATION B FHO-59 __296 /._8208_

Techalcal Specification Involved 3.8.B.8 Reported Under Technica! Specification 6.7.2.b.2 Date Due NRC 4/30/82 Event Narrative.

Unit 1 was operating at 98 percent; unit 2 was operating at 97 percent; and unit 3 was in a refueling outage. Only unit 3 was affected by the event. During the daily source and background check of continuous air monitor (CAM) 3-90-250 personnel discovered that the inlet sample line had been disconnected. S e line had been verified connected on the previous day.

Technical Specification 3.8.B.8 requires the reactor and turbine building vents be continuously monitored. Wese requirements were not met for a period of up to 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />. Because of the low activity levels present when the sample line was disconnected, the exact time that the sample line was disconnected could not be determined from a review of recorder traces.

During the time the sample line was disconnected, the CAM continued to monitor the ambient atmosphere around the CAM. We strip chart revealed no increase in activity levels during this time. During this time pericd there were no alarms received on local radiation monitors within unit 3.

There were no airborne contamination zones in use during the event. Activities within the unit 3 reactor and turbine buildings involved maintenance activities associated with the last phases of the refueling outage. Due to these facts, it can be stated that this event had no adverse effect on the health or safety of the public. There are no redundant systems.

The cause of this event was apparently personnel error of some form. It is very unlikely that the sample line vibrated loose. The CAM is located next to a personnel walkway; therefore, it is possible that some unknowing individual had a need to move the CAM unit for access to other equipnent and disconnected the sample line. Upon finding the sample line disconnected, personnel reconnected it. Warning signs will be placed on all effluent CAMS by May 19, 1982.

• Previous Similar Eve:nts:

NONE Ret en tic.n :

P. riod - Lifetime: Responsibility - Document Control Supervisor

[

• Revision :

Iy