ML20149D603

Final Deficiency Rept CP-87-56 Re Const Problems Observed in Pipe Whip Restraints Requiring Extensive Reinsps & re-evaluations of Specs.Initially Reported on 870807. Procedures Revised

ML20149D603
Person / Time
Site:	Comanche Peak
Issue date:	02/05/1988
From:	Beck J, Counsil W TEXAS UTILITIES ELECTRIC CO. (TU ELECTRIC)
To:	NRC OFFICE OF ADMINISTRATION & RESOURCES MANAGEMENT (ARM)
References
CP-87-56, TXX-88172, NUDOCS 8802090561
Download: ML20149D603 (3)

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Log i TXX-88172 File # 10110 x = 903.6

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1GELECTRIC wim.m c. coumii February 5, 1988 E1ecuant Vect hesLient U. S. Nuclear Regulatory Commission Attn: Document Control Desk Washington, D.C. 20555

SUBJECT:

COMANCHE PEAK STEAM FLECTRIC STATION DOCKET NOS. 50-445 AND 50-446 DEFICIENT PIPE WHIP RESTRAINTS SUAR: CP-87-56 (FINALREPORT)

Gentlemen:

On August 7, 1987, we verbally notified your Mr. C. Hale of a deficiency involving construction problems observed in pipe whip restraints that may require extensive reinspections and re-evaluation of the specifications. Our last report was logged TXX-88122, dated January 18, 1988. After further evaluation we have determined that this item is reportable under the provisions of 10CFR50.55(e) and the required information follows.

DESCRIPTION OF DEFICIENCY The following deficiencies have been observed in pipe whip restraint installations:

a) tightness in structurally bolted joints b) missing components, missing shim welds in bearing type joints, and levelness /plumbness deviations missing or damaged cotter pins c}

d improper locking device applications e missing field welds (AWS) fh deviations for cold gaps between pipe and restraint These deficiencies were discovered during the third party inspections using procedures, inspect ion attributes, and criteria developed for the Comanche Peak Response Team (CPF,T) Program. The cause of these deficiencies is inadequate engineering direction for installation of the pipe whip restraints.

The deficiencies are applicable to pipe whip restraints installed at CPSES (Units 1 and 2).

8802090561 880205 PDR ADOCK 05000445 S PDR 400 North Ohve Street L B 8I Dalla Texas 73.'01 I

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. February 5, 1988

, Page 2 of 3 SAFETY IMPLICATIONS-These' deficiencies could result.in the failure of these restraints to perform

.their intended safety functions.

.This issue. represents a significant deficiency in construction requiring-extensive evaluation to establish the adequacy of the pipe whip restraints to f perform their intended safety function.

CORRECTIVE ACTION L

Deficiencies a) through e) have been corrected by revision to governing o . specification 2323-SS-168,-"Structural Steel / Miscellaneous Steel (Category I and 11)" to include the installation inspection, and acceptance criteria for pipe whip restraints. During the Post Construction Hardware Validation Program (PCHVP)' a reinspection of the pipe whip restraints is being conducted in accordance with Field Verification Methods (FVM) CPE-SWEC-FVM-EE/ME/IC/CS-086, CPE SWEC-FVM-EE/ME/IC/CS-089, CPE-SWEC-FVM-EE/ME/IC/CS-090, and. evaluated by ECE 9.04-05.

The corrective action for item f), deviations in cold gaps between pipe and restraint is-as follows:.

Procedures are being revised to delineate evaluation, tracking.and implementation responsibilities to ensure that required final cold gap-adjustments are made to satisfy the design requirements. Methods will be prescribed for documenting engineering acceptance of final cold gap settings for all_ pipe whip restraints. These measures will be implemented when hot functional testing (HFT) is performed.

Recurrence of these deficiencies are prevented by revision of specification 2323-55-168 which now provides the installation and the inspection criteria for future installations. Construction and Quality Control personnel have been provided additional training in accordance with the revised criteria.

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I TXX-88172 February 5, 1988~

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. The Unit 1 completion schedule for this issue will be commensurate with the completion of PCHVP. All corrective actions for Unit 2 will be implemented prior to Unit 2 fuel. b d.

Very truly yours,-

.W. G. Counsil By; 0&o dot {p W. Beck Vice President, Nuclear Engineering HAM /grr c-Mr. R. D. Martin, Region IV '

Resident inspectors, CPSES_(3)

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