ML20154G018

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Forwards Confirmation That Administrative Controls in Place to Reduce Probability of Auxiliary Feedwater Pump Failure Due to Steam Binding,Per Generic Ltr 88-03, Steam Binding of Auxiliary Feedwater Pumps
ML20154G018
Person / Time
Site: Comanche Peak  Luminant icon.png
Issue date: 05/17/1988
From: Counsil W
TEXAS UTILITIES ELECTRIC CO. (TU ELECTRIC)
To:
NRC OFFICE OF ADMINISTRATION & RESOURCES MANAGEMENT (ARM)
References
GL-88-03, GL-88-3, IEB-85-001, IEB-85-1, TXX-88456, NUDOCS 8805240181
Download: ML20154G018 (2)


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Log # TXX-88456

= = File # 10035 r r 7tlELECTRIC May 17, 1988 Willis,n G. Counsil Execuane Vwe President U. S. Nuclear Regulatory Commission Attn: Document Control Desk Washington, D.C. 20555

SUBJECT:

COMANCHE PEAK STEAM ELECTRIC STATION (CPSES)

RESPONSE TO GENERIC LETTER 88-03 STEAM BINDING 0F AUXILIARY FEEDWATER PUMPS REF: 1) HRC IE Bulletin 85-01

2) W. G. Counsil letter to R. D. Martin, TXX-4937, dated August 1, 1986 Gentlemen:

Reference (1) requested that certain PWR plants implement procedures to monitor auxiliary feedwater (AFW) piping temperatures for indication of backleakage and restore the AFW pur,ps in the event steam binding occurs.

Reference (2) described the methods used at CPSES to accomplish these requirements in response to the IE Bulletin. Attached is confirmation that administrative controls are in place at CPSES to reduce the probability of AFW pump failure as a result of steam binding.

Very truly yours, W

i W. G. Counsil VPC/grr Attachment -

c - Mr. R. D. Martin, Region IV Resident Inspectors, CPSES (3) i i

pof l 8805240181 880517 i g l PDR ADOCK 05000445 j l 4 DCD 400 North Olive Street LB81 Dallas. Texas 7D01 l

\. .- - ._.

Attachment to TXX-88456 May 17, 1988 Page 1 of 1 Item 1:

Maintain procedures to monitor fluid conditions within the AFW system each shift during times when the system is required to be operable. This monitoring should ensure that fluid temperature at the AFW discharge is maintained at about ambient levels.

Response 1:

In Reference (2), CPSES committed to venting the pump casing on the motor driven and turbine driven AFW pumps once a shif t for evidence of steam. As an alternative to this commitment, TV Electric will monitor the AFW pump discharge piping temperature by teuch to determine if the temperature is at or near ambient conditions. This action is performed each shift. Should abnormal temperatu es exist, the pump casing is vented and the Shift Supervisor notified. Operations Administrative Procedure, ODA-301, "Opercting Logs" has been revised to reflect this change in methodology. This revised approach to monitoring AFW fluid conditions was described'in Reference (1) as an acceptable method for meeting the requirements.

Item 2:

Maintain procedures for recognizing steam binding and for restoring the AFW system to operable status, should steam binding occur.

Response 2:

An Abnormal Operating Procedure, ABN-305A, "Auxiliary Feedwater System Malfunctions", has been written which includes plant indications of steam binding in an AFW pump and p;ovides operator action to restore the AFW pump to an operable status for Unit 1. The Abnormal Operating Procedure for Unit 2 will be developed by Unit 2 fuel load.

Additional requested information:

1. Staff time to perform requested confirmation.

Response: 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br />

2. Staff time to prepare requested documentation. '

Response: 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> l

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