ML20086M409

Forwards LER Re Automatic Reactor Trip That Occurred as Result of lo-lo SG Level.During Process of Establishing Clearance for Maint Activity on Radiation Monitor,Assistant Unit Operator Opened Wrong Breaker

ML20086M409
Person / Time
Site:	Sequoyah
Issue date:	07/18/1995
From:	Adney R TENNESSEE VALLEY AUTHORITY
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
Shared Package
ML20086M415	List: 05000327/LER-1995-008, :on 950623,reactor Trip Occurred as Result of lo-lo SG Level.Caused by Personnel Error.Standing Order Issued to Operations Personnel & Appropriate Disciplinary Action Taken ML20086M409
References
NUDOCS 9507240277
Download: ML20086M409 (2)

Text

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'IUA Tennessee Valley Authority Post Office Box 2000. Soddy-Datsy. Tennessee 37379 July 18, 1995 U.S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, D.C. 20555 Gentlemen:

TENNESSEE VALLEY AUTHORITY - SEQUOYAH NUCLEAR PLANT UNIT 1 - DOCKET No. 50-327 - FACILITY OPERATING LICENSE DPR LICENSEE EVENT REPORT (LER) 50-327/95008 The enclosed LER provides details concerning an automatic reactor trip

)

that occurred as a result of a lo-lo steam generator level. During the process of establishing a clearance for a maintenance activity on a j

radiation monitor, an assistant unit operator opened the wrong breaker.

This resulted in a loss of power to Reactor Protection Set 1.

The loss of power to the protection set caused a reduction in feedwater flow, resulting in decreasing levels in the steam generators and a subsequent j

reactor trip. This event is being reported in accordance with i

10 CFR 50.73(a)(2)(iv) as an event that resulted in the automatic actuation of engineered safety features, including the reactor protection system.

Sincerely, h

R.J.hdney Site Vice President Enclosure cc:

See page 2 25005i hE'*UEEl Qg;ge,,

PDR j

72 4

U.S.* Nuclear Regulatory Commission Page 2 July 18, 1995 cc (Enclosure):

INPO Records Center Institute of Nuclear Power Operations 700 Galleria Parkway Atlanta, Georgia 30339-5957 Mr. D. E. LaBarge, Project Manager U.S. Nuclear Regulatory Commission One White Flint, North 11555 Rockville Pike Rockville, Maryland 20852-2739 NRC Resident Inspector Sequoyah Nuclear Plant 2600 Igou Ferry Road Soddy-Daisy, Tennessee 37379-3624 Regional Administrator U.S. Nuclear Regulatory Commission Region II 101 Marietta Street, NW, Suite 2900 1

Atlanta, Georgia 30323-2711