ML20247B962
| ML20247B962 | |
| Person / Time | |
|---|---|
| Site: | Comanche Peak  |
| Issue date: | 09/05/1989 |
| From: | William Cahill TEXAS UTILITIES ELECTRIC CO. (TU ELECTRIC) |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| CP-88-36, TXX-89663, NUDOCS 8909130197 | |
| Download: ML20247B962 (2) | |
Text
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' Log. # TXX-89663
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903.9 filELECTRIC i
l September 5, 1989
.' Wiuisen J. Cabiu. Jr.
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Executive Vice l>esident i
U. S. Nuclear Regulatory Commission Attn:l Document Control Desk Washington, D. C.
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SUBJECT:
TCOMANCHE PEAK STEAM ELECTRIC STATION (CPSES)
DOCKET NOS.-50-445 AND 50-446 CHARGING PUMP MINIFLOW' LINES j
SDAR: CP-88-36 (FINAL REPORT - UNIT 1)
(INTERIM REPORT - UNIT 2)
Gentlemen:
On November 7,1988, TV Electric notified the NRC.by report logged TXX-88765' of~a deficiency involving the Chemical Volume and Control System (CVCS) charging pumps' alternate minimum flow recirculation piping. The latest
. report'on'this' issue,' logged.TXX-89239, was submitted May 3, 1989. 'After j
further evaluation, it has been concluded that this condition is not reportable under.the provisions of 10CFR50.55(e) for Unit 1.
Piping downstream of the discharge of. relief valves 1-8510A & B and 2-8510A & B in.the CVCS charging pumps' alternate minimum flow recirculation flowpath-is required to be supported such that the pressure boundary will remain intact and will allow flow through the piping following a Safe Shutdown Earthquake (SSE).
The concern identified was that compliance with this requirement had not been demonstrated.
l The results of Unit 1 piping stress analysis of the installed piping system
.J and'a structural integrity review of the pipe sapport design indicated that
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the piping system, as installed, would have remained intact and would have 1
allowed flow through the piping following a Safe Shutdown Earthquake (SSE).
There, fore, it was concluded that the safety of Unit 1. plant operations would not have been adversely affected.
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8909130197 890905 r
'@ll F,DR ADOCK 05000445
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400 North Olive Street LB81 Dallas, Texas 75201 l
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a TXX-89663:
September 5; 1989
- Page 2 of 2.
- Our-next. report on this' issue, which will address the results of Unit.2 safety significance evaluations, will be. submitted after resumption of the balance of Unit 2, engineering activities.
Sincerely,
. William:J. Qahill, Jr..
By:
- i. :
D. R. Woodlan-Docket Licensing Manager
'SEC/smp g
.'c. 'Mr. R.
D.. Martin, Region IV Resident Inspectors,.CPSES (3)
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