05000328/LER-1981-158-03, /03L-0:on 811221,in Mode 3,turbine-driven Auxiliary Feedwater Pump Failed to Develop Operating Speed. Caused by Incorrectly Terminated Signal Input Wires to Controller 2-FIC-46-57.Wiring Corrected & Pump Tested

/03L-0:on 811221,in Mode 3,turbine-driven Auxiliary Feedwater Pump Failed to Develop Operating Speed. Caused by Incorrectly Terminated Signal Input Wires to Controller 2-FIC-46-57.Wiring Corrected & Pump Tested

ML20040F860
Person / Time
Site:	Sequoyah
Issue date:	01/19/1982
From:	Harding M, Rogers H TENNESSEE VALLEY AUTHORITY
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML20040F857	List: 05000328/LER-1981-158, Forwards LER 81-158/03L-0 05000328/LER-1981-158-03, /03L-0:on 811221,in Mode 3,turbine-driven Auxiliary Feedwater Pump Failed to Develop Operating Speed. Caused by Incorrectly Terminated Signal Input Wires to Controller 2-FIC-46-57.Wiring Corrected & Pump Tested
References
LER-81-158-03L, LER-81-158-3L, NUDOCS 8202100383
Download: ML20040F860 (2)

LER-1981-158, /03L-0:on 811221,in Mode 3,turbine-driven Auxiliary Feedwater Pump Failed to Develop Operating Speed. Caused by Incorrectly Terminated Signal Input Wires to Controller 2-FIC-46-57.Wiring Corrected & Pump Tested

Event date:
Report date:
3281981158R03 - NRC Website

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'4 C3 LVF*dTOATE 74 lb A(PORT O AT E 80 EVENT DESCnlPTION AND PnOD AOL E CONSECUENCE: h o 2 l With Unit 2 in Mode 3 (0% power, 547 degrees F, 2235 psig) at 1335 CST on 12/21/81, [ol3l l the turbine-driven auxiliary feedwater pump was declared inoperable due to failure lo l4 l l to develop the required operating speed. This event placed the unit in action 101 s 1 I statement (a) of LCO 3.7.1.2.

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CAUSE DESCnlPTION AND CORRECTIVC ACTIONS h l loll The signal input wires to controller 2-FIC-46-57 were incorrectly terminated.

Upon Ii 1:I l discovery, the ulres' terminations were corrected and the turbine-driven auxiliary

[,#2j l feedwater pump functionally tested for the required operating speed. The pump was t

j l,l3ll returned to service at 1515 on 12/21/81.

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.Name of Preparer: 11. R.

Rogers

/M. R. ' llarding Phone: (615) 751-0349 i.;J

.Sequoyah Nuclear Plant LER SUPPLEMENTAL INFORMATION SQRO-50-328/81158 Technical Specification Involved:

3.7.1.2 Reported Under Technical Specification:

6.9.1.13.b Date of Occurrence:

12/21/81 Time of occurrence:

1335 CST Identification and Description of Occurrence:

During the performance of SI-130.1, the turbine-driven auxiliary feedwater pump failed to develop the required operating speed.

Conditions Prior to Occurrence:

Unit 2 Mode 3 (0% power, 547 degrees F, 2235 psig)

Apparent Cause of Occurrence:

The turbine-driven auxiliary feedwater pump developed only 1300 RPM (rated at 3970 RPM). Upon investigation the flow indicating controller (2-FIC-46-57) was found to have the signal input wire incorrectly terminated.

A review was made of previous work done on the controller, and maintenance request no. 163431 was being worked prior to this event by maintenance personnel. The most probable cause for the leads being incorrectly terminated is that a mistake was made in reterminating the wires while trying to locate a ground fault problem on this maintenance request.

e Analysis of Occurrence:

The turbine-driven auxiliary feedwater pump could not have developed the required operating speeds, thus the required flow rate would not have been obtained.

4

Corrective Action

The wires were correctly reterminated and SI-130.1 was successfully run, with the pump developing the required operating speed. The pump was declared operabic at 1S15 CST on 12/21/81.

Failure Data:

None.

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