ML20004F765

Forwards Significant Deficiency Rept 413/81-10 Re Restraint 1-A-NI-4037,installed & Inspected as y-directional Rather than z-directional Restraint Per Design Documents.Restraint to Be Reinstalled & Isometrics to Be Reviewed & Clarified

ML20004F765
Person / Time
Site:	Catawba
Issue date:	06/15/1981
From:	Parker W DUKE POWER CO.
To:	James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
References
10CFR-050.55E, 10CFR-50.55E, NUDOCS 8106220300
Download: ML20004F765 (3)

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Mr. James P. O'Reilly Director U. S. Nuclear Regulatory Commission ~~h .

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Re: Catawba Nuclear Station Unit 1

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Docket No. 50-413

Dear Mr. O'Reilly:

Pursuant to ICCFR 50.55e, please find attached Significant Deficiency Re, ort SD '.13/31-10.

Very truly yours,

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' William 0. Parker, Jr. . -

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RWO/djs Attachment cc: Director NRC Resident Inspector Of fice of Inspecti>n sad Enforcement Catawba Nuclear Statica U. S. Nuclear Regul.atory Cemnission Washington, D. C. 20555 fElf SI I 81062M0300 ,-

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Duke Power Company Catawba Nuclear Station Report No.: SD 413/81-10 Report Date: June 15, 1981 Facility: Catawba Nuclear Station, Unit 1 Identification of Deficiency: Restraint Number, 1-A-NI-4037, was installed and inspected as a y-directional restraint rather than a z-directional restraint as shown on design documents.

Description of Deficiency: In the use of typical sketches as specified on design drawings (isometrics), Restraint 1-A-NI-4037 was orientated incorrectly.

Site Technical Support personnel incorrectly specified the orientation in the process control package. Site craft installed the restraint as shown in the process control package. Quality Control inspected the restraint per the information contained in the package. As a result, it is possible that the NI system could be overstressed with restraint 1-A-NI-4037 installed as stated.

Analysis of Safety Impact: Reanalysis of Restraint 1-A-NI-4037, as installed, by Duke Design Engineering, has shown that the piping would have been over-stressed during operation had the deficiency not been discovered.

Corrective Action:

(1) Rest:aint 1-A-NI-4037 will be removed and instaTied as a z-direction-al restraint.

(2) The information contained on isometrics pertaining to orientation of support / restraints that involve typical sketches w 11 be reviewed and clarified as necessary.

(3) Personnel currently assigned craftcheck and precheck functions, and those who prepare and review component support process control pack-ages, shall receive formal training in determining proper orientation of support / restraints that involve typical sketches.

(4) Personnel assigned to inspect support / restraints, will receive formal training in how to inspect orientation of support / restraints involving typical sketches.

(5) Construction Surveillance Checklist CEI-2 will be updated tn include a review of orientation of support / restraints in the process control package preparation section. Inspection instructions, CN-1, will be reviewed and revised .ts necessary te update instructions for support orientation.

Corrective Action Completion Dates:

Item Completion Date (1) Re-install Restraint 1-A-Ni-4037 in accordance with Construction as a z-directional restraint. scredule.

(2) Design Engineering will review July 3, 1981 and clari fy isometrics wi th typical sketches specified.

(3) Formal training for Constructior July 15, 1981 personnel, highlighting orientat'on of support / restraint involving typical sketches.

(4) Formal training for Quality July 15, 1981 Control inspectors, highlighting orientation of support / restraint involving typical sketches.

(5) quality Assurance to update July 15, 1981 Ccns truction Surveillance Checklis t CEl-2 and inspection instructions CH-1.

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