ML20195J065

Submits Response to RAI Re GL 95-07, Pressure Locking & Thermal Binding of Safety Related Power Operated Gate Valves

ML20195J065
Person / Time
Site:	Comanche Peak
Issue date:	06/14/1999
From:	Terry C, Walker R TEXAS UTILITIES ELECTRIC CO. (TU ELECTRIC)
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
GL-95-07, GL-95-7, TXX-99149, NUDOCS 9906180075
Download: ML20195J065 (2)

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Log # TXX 99149 File # 10035 Ref. # 10CFR50.54(f) 1UELECTRIC GL g5 07

c. w nievy June 14,1999 Senior Mce President de PrincipalNuclear Oficer U. S. Nuclear Regulatory Commission Attn.: Document Control Desk Washington, D.C. 20555-0001

SUBJECT:

COMANCHE PEAK STEAM ELECTRIC STATION (CPSES) UNITS 1 AND 2 DOCKET NUMBERS 50-445 AND 50-446 '

RESPONSE TO REQUEST FOR ADDITIONAL INFORMATION REGARDING GENERIC LETTER 95-07," PRESSURE LOCKING AND THERMAL P!MOlNG OF SAFETY RELATED POWER OPERATED GATE VAINET REF: 1. Generic Letter 95-07, " Pressure Lccking and Thermal Binding of Safety Related Power Operated Gate Valves," dated August 17,1995

2. TXU Electric letter logged TXX-99022 from Mr. C. L. Terry to NRC dated May 25,1999 Via Reference 2 TXU Electric responded to information requested for TXU Electric's submittal for Reference 1. During a teleconference on June 4,1999, the NRC staff requested that TXU Electric provide information with respect to certain valves which had a lower margin than expected, as to how and when these valves will be modified.

The valve information requested by the NRC is as follows:

1) Valve 1-8801 A will have torque switch adjustment performed on it. This adjustment will increase the unseating margin. This modification will be completed during 1RFO7, which is the upcoming outage for CPSES Unit 1.

2) Valves 1-8804 A/B modification will be an actuator gear change. This modification will increase actuator capability to provide additional unseating Q

. margin. This modification will be completed during 1RFO7, which is the upcoming outage for CPSES Unit 1.

p<o hf 9906180075 990614 PDR ADOCK 05000445 P PDR ,,

1. TXU Electric was formerly TU Electric. A license amendment request (LAR 99-003) was submitted per TXX-99122, dated May 14,1999, to revise the company name contained in the CPSES operating licenses.

COMANCHE PEAK SILAM ELECTRIC STATION

. s , P.O. Box 1002 Glen Rose. Texas 76043 1002 (J i) ; i .s 0

TXX-99149.

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3) Valve 2-8804B modification was a limit switch adjustment, which was completed during the last refueling outage for CPSES Unit 2 (2RFO4). This adjustment will increase the unseating margin.

4) Valves 1-8716A/B modifications will consist of adding a relief valve and associated piping to the valve bonnets. These modifications will be completed during 1RFO8, which is the outage after this upcoming outage or CPSES Unit 1.

5) . Valves 2-8716A/B modifications will consist of adding a relief valve and associated piping to the valve bonnets. These modifications will be completed during 2RFOS, which is upcoming outage for CPSES Unit 2.

This communication contains the following new commitment which will be completed as noted:

CDF Number Commitment

[27179) [The commitment provides the dates of modification as stated

.above.]

If you have any questions, please contact Obaid Bhatty at (254) 897-5839.

Sincerely, S,

C. L. Terry By: M Roger EfWalker Regulatory Affairs Manager OAB/oab cc: Mr. E. W. Merschoff, Region IV Mr. J. l. Tapia, Region IV Mr. D. H. Jaffe, NRR Resident inspectors, CPSES