05000327/LER-1981-012-03, /03L-0:on 810126,RCS Tave Decreased Below Limits. Caused by Operator Failure to Coordinate Turbine Loading Rate.Turbine Load Reduced & RCS Tave Increased

/03L-0:on 810126,RCS Tave Decreased Below Limits. Caused by Operator Failure to Coordinate Turbine Loading Rate.Turbine Load Reduced & RCS Tave Increased

ML20003E875
Person / Time
Site:	Sequoyah
Issue date:	04/10/1981
From:	Kirk G, Mcgriff J TENNESSEE VALLEY AUTHORITY
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML20003E872	List: 05000327/LER-1981-012, Forwards LER 81-012/03L-0 05000327/LER-1981-012-03, /03L-0:on 810126,RCS Tave Decreased Below Limits. Caused by Operator Failure to Coordinate Turbine Loading Rate.Turbine Load Reduced & RCS Tave Increased
References
LER-81-012-03L-01, LER-81-12-3L-1, NUDOCS 8104170422
Download: ML20003E875 (2)

LER-1981-012, /03L-0:on 810126,RCS Tave Decreased Below Limits. Caused by Operator Failure to Coordinate Turbine Loading Rate.Turbine Load Reduced & RCS Tave Increased

Event date:
Report date:
3271981012R03 - NRC Website

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' Tennesr.cc \\' alley Authority Sequoyah Nuclear Plant LER SUPPLEMENTAL INFORMATION SQRO-50-327/81012 Technical Specification Involved:

3.1.1.4 Reported Under Technical Specification:

6.9.1.13.b Date of Occurrence: 01/26/81 Time of Occurrence:

1900 CST Identification and Description of Occurrence:

0 Reactor coolant system Tave decreased below the 541* ltnit, to 535 F.

Conditions Prior to Occurrence:

Mode 1, 10% reactor power, routine startup Aeparent Cause of Occurrence:

During reactor and turbine startup, with 'D' bank rods at approxLastely 209 steps, the reactor operator was diluting to insert rods and increase power simultaneously. Due to inadequate coordination by the unit operator, the assistant shift engineer was loading the turbine to a point beyond reactor power.

Analysis of Occurrence:

Action statement of LCO 3.1.1.4 was entered. RCS Tave was returned above 5410F within 7 minutes.

Corrective Action

Turbine load was reduced to allow RCS Tave to increase above 5410F.

Failure Data:

None