ML20040B410

Second Interim Deficiency Rept Re Wiring Terminations in Remote Shutdown Panels,Initially Reported 810922.Addl Evaluations Underway to Determine Specific Cause & Safety Effects

ML20040B410
Person / Time
Site:	Grand Gulf
Issue date:	01/08/1982
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, NUDOCS 8201260022
Download: ML20040B410 (3)

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y y ;no p MISSISSIPP;iPOWER & LIGHT COMPANY Helping B uild Mis sis sippi P. O . BOX 1640, J A C K S O fJ. MISSISSIPPI 39205 32 JP] lI Ab-lI J APM $ P McGAUGHY, JR awm.a v,a , . s,oi m January 8, 1982 Office of Inspection & Enforcement ,

U. S. Nuclear Regulatory Commission ,'

Region It 101 Marietta Street, N.W.

Suite 3100 [,

Atlanta, Georgia 30303 Attention: Mr. J. P. O'Reilly , Director l

Dear Mr. O'Reilly:

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SUBJECT:

Grand Gulf Nuclear Station Units 1 and 2 Docket Nos. 50-416/417 File 0260/15525/1552i PRD-81/39, Interim Report #2, Remote Shutdown Panels AECM-82/07

Reference:

AECM-81/418, 10/22/81 On September 22, 1981, Mississippi Power & Light Comt.any notified Mr P.

A. Taylor, of your office, of a Potentially Reportable Deficiency (PRD) at the Grand Gulf Nuclear Station (GGNS) construction site. The deficiency concerns wiring terminations in the Remote Shutdown Panels supplied by the Reliance Electric Company.

This report was originally due on December 15, 1981, but extensions were requested and were granted by Massr . F. S. Cantrell and R. Butcher, of your office.

We have not completed our determination of reportability. We expect to submit a final report by February 19, 1982.

,Yours truly,/

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ATR:s ATTACIIMENT cc: See page 2 1

1 8201260022 920108

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1 Mr. J. P. O'Reilly AEC4-82/07 NRC Page 2 cc: Mr. N. L. Stampley Mr. R. B. McGehee Mr. T. B. Conner Mr. Richard C. DeYoung, Director Of fice of Inspection & Enforcement U. S. Nuclear Regulatory Commission Washington, D.C. 20535 Mr. G. B. Taylor South Miss. Electric Power Association P. O. Box 1589 llattiesburg, MS 39401

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Attachment to AECM-82/07 Page 1 of 1 INTERIM REPORT #2 FOR PRD-81/39 I. Description of the D_ficiency An investigative inspection of the wiring terminations in the Remote Shutdown Panels (1H22-P150 and lH22-P151) detected numerous loose connections, improper wire crimps, and wire size to terminal lug size discrepancies. The detection of these discrepancies was based oi an arbitrary acceptance criteria.

The Remote Shutdown System provides controls for reactor systems needed to carry out the shutdown function from outside the Control Room and bring the reactor to a safe shutdown condition in an orderly manner.

These reactor systems are the Reactor Core Isolation Cooling (RCIC),

Residual Heat Removal (RHR) Systems A & B, Standby Service Water (SSW)

Systems A & B, and the Nuclear Boiler System (Safety-Relief Valves).

t II. Approach to Resolution of the Problem MP&L Project Engineering is to determine if the noted deficienciee, had they rentined uncorrected, could have adversely affected the safety of operations of the plant. At this juncture, preliminary indications are that the deficiencies do not appear to be a result of vendor actions for the following reasons:

1. The purchase specification stipulatas rigid requirements for point-to point continuity and seismic testing.

2. The panels successfully passed a rigorous testing program by the vendor. i l

3. Subsequent potat-to-point continuity checks and loop calibration i checks by Start-up personnel have not revealed any functional l problems.

III. Status of Proposed Resolution MP&L Project Engineering has beca asked to conduct additional evaluations to determine the specific ef fecta on safety as well as the specific cause of the deficiencies.

Corrective actions have been initiated to rework the panels.

IV. Reason for Delay of Final Report.

Investigative actions have not been completed.

V. Final Report atte We expect to submit a final report by February 19, 1982.

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