ML20155J203
| ML20155J203 | |
| Person / Time | |
|---|---|
| Site: | Comanche Peak  |
| Issue date: | 10/21/1988 |
| From: | Counsil W, Woodlan D TEXAS UTILITIES ELECTRIC CO. (TU ELECTRIC) |
| To: | NRC OFFICE OF ADMINISTRATION & RESOURCES MANAGEMENT (ARM) |
| References | |
| IEB-88-008, IEB-88-8, NRCB-88-08, NRCB-88-8, TXX-88740, NUDOCS 8810250388 | |
| Download: ML20155J203 (2) | |
Text
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-Log # TXX-88740 File # 10119 Ref. # NRCB 88-08 1UELECTRIC October 21, 1988 EONdn i
U. S. Nuclear Regulatory Commission Attn: Document Control Desk Washington, D. C.
20555
SUBJECT:
COMANCHE PEAX STEAM ELECTRIC STATION (CPSES)
DOCKET N05.50-44S AND S0-446 1
NRC BULLETIN 88-08:
THERMAL STRESSES IN PIPING CONNECTED TO REACTOR COOLANT SYSTEMS Gentlemen:
1 i
j The following CPSES information is provided in response to fieport.ing Requirement 1 of NRC Bulletin 88-08, "Thermal Stresses in Piping Cone.2cted to
(
l i
CPSES has completed a review of applicable systems connected to the Reactor Coolant System (RCS) as required by Action 1 of the bulletin. TV Electric has I
identified unisolable sections of piping connected to the RCS that may be
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subjected to stresses from temperature stratification or temperature 1
i cscillations that could be induced by leaking valves and were not evaluated in j
the design analysis of the piping.
The lines that may be affected by these types of thermal stresses are:
j 1.
charging line downstream of valve 8146, 2.
alternate charging line downstream of valve 8147, 1
3.
auxiliary spray line downstream of valve 8145, and 4.
four centrifugal charging pump cold leg injaction lines downstream of valves 8801A/88018.
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In addition, we are aware of the phenomenon cited in footnote 1 of this l
bulletin, and Information Notice 68-80 related to the potential for tharmal I
stratification in the pressurizer surge line as a result of a tempera,re I
i difference between the pressurizer and the RCS hot leg during heatup cnd i
cooldown sequc-ices.
Since this potential thermal stratification would not be I
the result of leaking valves and therefore not within the scope of this bulletin, this issue is being addrw.ed independently of the actions required i
1 by this bullc+in.
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4 DOC i
400 North Ohr Sirret LB EI Dellen, Tem 1H01
e 1XX-88740 Pago'2 of 2 October 21, 1988 Actions 2 and 3 will be completed prior to criticality of the respective CPSES unit.
TU Electric will submit a letter describing the actions taken within 30 days of completion of Actions 2 and 3 for each CPSES unit.
Very truly yours, u ). c,. O W. G. Counsil By:
D. R. Woodlan Docket Licensing Manager HAM /gj c - Mr. R. D. Martin, Region IV Resident Inspectors, CPSES (3) d 1
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