ML20053E149

Final Deficiency Rept Re Control Rod Drive Support Installations Not in Accordance W/Design Requirements, Initially Reported on 820317.QC Holds Dispositioned to Repair Deficiencies.Monitoring Activities Increased

ML20053E149
Person / Time
Site:	Grand Gulf
Issue date:	05/27/1982
From:	Mcgaughy J MISSISSIPPI POWER & LIGHT CO.
To:	James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
References
10CFR-050.55E, 10CFR-50.55E, AECM-82-240, NUDOCS 8206070650
Download: ML20053E149 (3)

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MISSISSIPPI POWER &, LIGHT' COMPANY .

Helping Build Mitsfss{ppi P. O. B O X 16 4 0, J A C K S O N , M I S ifl S S I P P I 39205

<tg JAMES P. McGAUGHY, JR May 27, 1982

'h AS$;ST ANT vlCE PRE 5tDE NT Of fice of Inspection & Enfercement U. S. Nuclear Regulatory Commission Region Il 101 Marietta Street, N.W.

Suite 3100 Atlanta, Georgia 30303 Attention: Mr. J. P. O'Reilly, Regional Administrator

SUBJECT:

Grand Gulf Nuclear Station Unit 1 Docket No. 50-416 File 0260/15525/15526 PRD-82/13, Final Report, RCI Supports AECM-82/240 Re fe rence : AECM-82/182, 4/28/82 On March 17, 1982, Mississippi Power & Light Company notified Mr. R.

Butcher, of your of fice, of a Potentially Reportable Deficiency (PRD) at the Grand Gulf Nuclear Station (GCNS) construction site. The deficiency concerns supports installed and accepted by Reactor Controls, Inc. (RCI) that are not in accordance with approved design requirements.

Msed on the results of our investigation, we have determined that this deficiency is reportable under the provisions of 10CFR50.55(e). All details are provided in our attached Final Report.

Yours truly, y J. P. McGaughy, Jr.

ACP:dr ATTACHMENT See Page 2 8206070650 820527 PDR ADOCK 05000416 R,6TO. 6;r c',

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Member Middle South Utilities System 1617 y

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• Mr. J. P. O'Reilly AECM-82/240 NRC Page 2 cc: Mr. N. L. Stampley Mr. R. B. McGehee Mr. T. B. Conner Mr. Richard C. DeYoung, Director Office of Inspection & Enforcement U. S. flucletar Regulatory Commissiot Washington, D.C. 20555 Mr. G. B. Taylor South Miss. Electric Power Association P. O. Box 1589 Flattiesburg, MS 39401 I

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Attachment to AECM-82/240 Paga 1~of 1 FINAL REPORT FOR PRD-82/13 I. Description of the Deficiency Reactor Controls,-Incorporated (RCI) has accepted Control Rod Drive (CRD) support installations which are not in accordance with design requirements. 'These are documentated on RCI Nonconformance documents "QC Holds" 141-41, 142-41, 14 3-41, 157-41, 158-41 and 159-41.

The deficiency only affects the CRD Hydraulic System C-11. It does not apply to the NSSS vendor.

The cause of the deficiency was RCI's failure to follow the require-ments of their approved QA program. 10CFR21 is not applicable since the CRD supports involved with the deficien'cy have not been accepted by MP&L. RCI has not of fered the supports for acceptance and a 10CFR21 report is not applicable at this time.

II. Analysis of Safety Implications An evaluation of the noted conditions has been performed by RCI. It was found that scram header supports No. 6 and No. 8 on the 270 side and support No. 6 on the 90 side could have possible weld over-stress conditions.

During a seismic event the noted supports could have failed to perform their intended design function; therefore, the safety of plant opera-tions could not be assured had the condition remained uncorrected.

We have determined that the noted condition should be reported under the provisions of 10CFRF50.55(e).

III. Corrective Actions Taken The cause of the deficiency was RCI's failure to follo: the require-ments of their approved QA program. The extent of the deficiency is limited to the QC Holds identified above. RCI performed a 100% re-inspection of all C-11 supports that had previously been accepted.

The QC Holds have been dispositioned to repair the deficiencies. The repairs have been completed per approved procedures. RCI QC has verified the repairs and the QC Holds have been closed.

RCI's QC supervisor has verbally instructed personnel performing inspections to follow the requirements of their QA procedure for inspections.

In addition, our Constructor's QC has increased their monitoring activities of RCI's re-inspection activities by performing a 100%

inspection of random selected installed supports until such time the confidence level of RCI's inspections allow stopage of the 100%

inspections.