TXX-6927, Final Deficiency Rept CP-87-18 Re Deficient Vendor Qualification Documentation for Component Cooling Water Hxs. Initially Reported on 870608.HXs Acceptable Under as-built Loading W/O Mod.Condition Not Reportable Per 10CFR50.55(e)
| ML20236N683 | |
| Person / Time | |
|---|---|
| Site: | Comanche Peak  |
| Issue date: | 11/06/1987 |
| From: | Counsil W, Woodlan D TEXAS UTILITIES ELECTRIC CO. (TU ELECTRIC) |
| To: | NRC OFFICE OF ADMINISTRATION & RESOURCES MANAGEMENT (ARM) |
| References | |
| CP-87-18, TXX-6927, NUDOCS 8711160287 | |
| Download: ML20236N683 (2) | |
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MEE log # TXX-6927 File # 10110
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909.2 M# ELECTRIC Ref # 10CFR50.55(e) wmiam c. counsii November 6,1987 t -
' Executin nee Presi&nt
{
U. S. Nuclear Regulatory Commission
- ATTN:
Document Control Desk Washington, D.C.
20555
SUBJECT:
~COMANCHEPEAKSTEAMELECTRICSTATION(CPSES)
DOCKET N05. 50-445 AND 50-446 COMPONENT COOLING WATER (CCW) HEAT EXCHANGER SEISMIC QUALIFICATION SDAR:
CP-87-18l(FINALREPORT)
Gentlemen:
On June 8, 1987, we verbally notified your Mr. I. Barnes of a deficiency involving errors identified during a review of vendor qualification
' documentation for the CCW heat exchangers that indicated the seismic and nozzle loading conditions exceed specification requirements and could be overstressed. Our most recent report was logged TXX-6716, dated September 11, 1
1987.
The_ reanalysis of the Unit 1 & 2 heat exchanger utilizing the as-built piping nozzle loads have been completed.
Calculations IMT-CA-EQ-0119-MS-49 for Unit g
1 and IMT-CA-EQ-154-MS-49 for Unit 2 demonstrates that the heat exchangers are
_t acceptable under the as-built loading without modification.
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1 In addition, we have also completed an evaluation of the identified vendor l
qualification deficiencies.
These deficiencies, which involve the vendor's methodology used in establishing the seismic qualification of the component, could affect other nuclear facilities.
Calculation IMT-CA-EQ-0155-MS-49 demonstrated that qualification deficiencies discovered in vendor report No.
l 74-06-32467, " Seismic Qualification of CCW Heat Exchanger," resulted in the effected equipment not meeting the design requirements specified in Mechanical l:
Specification 2323-MS-049, "CCW Heat Exchanger." Had the Comanche Peak as-
. built piping loads on this heat exchanger not been less than the purchase specification values, the heat exchanger would have been overstressed.
Loss of this heat exchanger following a seismic event would represent a substantial
. safety hazard.
This report completes our notification of a possible deficiency in the. vendor design processes.
This item would be reported under the provisions of 10CFR21 but the NRC has been adequately informed of the deficiency by previous TV Electric letters concerning this SDAR.
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LWe.'hav'e concluded..in~the' event:this issue had remained undetected,.~no condition: adverse to'. safety-would have existed. This issue-is n.ot= reportable
'under' the provisions;of 10CFR50.55(e). ' Records supporting -this conclusion"are'-
Javailable for:yourfinspectors to review at the:CPSES Project Site'.
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Very.truly yours,.
$ Co. O W. G..Counsil' By:
o D. R. Woodlan l
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. Supervisor, Docket Licensing.
NCP/mgt
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'c.-~R.lD.': Martin,' Region IV L.
Resident Inspectors, CPSES (3)
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