TXX-6919, Final Deficiency Rept CP-87-34 Re Inconsistent Equipment Nozzle Load Interfaces.Initially Reported on 870710. Engineering Evaluation Shows That New Loads Resulting from Correct Interface within Acceptable Limits
| ML20236J355 | |
| Person / Time | |
|---|---|
| Site: | Comanche Peak  |
| Issue date: | 11/02/1987 |
| From: | Counsil W TEXAS UTILITIES ELECTRIC CO. (TU ELECTRIC) |
| To: | NRC OFFICE OF ADMINISTRATION & RESOURCES MANAGEMENT (ARM) |
| References | |
| CP-87-34, TXX-6919, NUDOCS 8711060018 | |
| Download: ML20236J355 (1) | |
Text
_
c i
'h a
= M1
~ Log # TXX-6919 '
File # 10110-
=
903.9 7tELECTRIC -
Ref #10CFR50.55(e) wmien c. counsii avember 2, 1987 Eucutive %x Preskknt U. S. Nuclear Regulatory Commission i
ATTN: Document Control Desk
]
Washington, D.C.
20555--
SUBJECT:
-COMANCHEPEAKSTEAMELECTRICSTATION(CPSES) d DOCKET NOS. 50-445 AND'50-446
]
EQUIPMENT N0ZZLE LOAD INTERFACES SDAR: CP-87.-34 (FINAL REPORT)
,q l
i 1
Gentlemen:
.j On July 10, 1987, we verbally notified your Mr. H. S. Phillips of a deficiency involving equipment nozzle-load interfaces for Units-1 and 2.
Our last interim report was logged TXX-6906 dated October 30i 1987. AfterLfurther 1
evaluation we have determined that this. item is not reportable under the provisions of 10CFR50.55(e). This is our final report on this issue.
l During evaluation of the' loads. generated at equipment nozzles in the pipe stress analysis, the proper interface was not consistently identified between the pipe stress analysis organization (SWECLPSAS) and.the. equipment supplier (Westinghouse).
This deficiency is the result of' inconsistent definition of the point of the application of the loads. The analyzing organization assumed all allowable loads were applicable at the pipe nozzle interface.
This assumption may.not always yield conservative results for the equipment where pipingiloads are compared at the nozzle to head junction.
One hundred thirty one'(131) equipment nozzles were identified as affected.by this condition.
Engineering evaluation has shown that for all cases.the-n'ew loads resulting from the correct interface were within acceptable limits.
Therefore, in the event this condition had-remained' uncorrected, no adverse affectontpesafetyoftheplantcould'have-'resulted.-
Records suiporting this conclusion are available.for review by your inspectors :
p at the CPS l:S plant site.
4-8711060016 B71102 i
Ve trul' yours, PDR ADOCM 05000445 S
. G.'Counsil l
RSB/mgt
,. >A -
i c - R. D. Martin,. Region IV LF' L
ResidentInspectors,CPSES:(3)
- {d. -
400 North Olive Street. LB 81 Dallas, Texas 73201)
- _ _ - - -