ML19312E559

Status Deficiency Rept Re Improper Bolt Torque Values Noted on HPCS Pump.Vendor Initiated Changes to Torque Values. Adequacy of Original Torquing Requirements Under Review. Final Rept Expected by 800804

ML19312E559
Person / Time
Site:	Grand Gulf
Issue date:	05/09/1980
From:	Dale L MISSISSIPPI POWER & LIGHT CO.
To:
References
AECM-80-99, NUDOCS 8006050316
Download: ML19312E559 (2)

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MISSISSIPPI POWER & LIGHT COMPANY Helping Build Mississippi P. O. B O X 16 4 0. J AC K S O N, MIS SIS SIP PI 3 9 2 0 5 PRODUCTION DEP A RTM E NT May 9, 1980 Office of Inspection & Enforcement U. S. Nuclear Regulatory Commission Region II 101 Marietta Street, N.W., Suite 3100 Atlanta, Georgia 30303 Attention:

Mr. J. P. O'Reilly, Director

SUBJECT:

Grand Gulf Nuclear Station Units 1 and 2 Docket Nos. 50-416 & 50-417 File 0272/15525/15526 PRD-80/17, Status Report, Improper Bolt Torque Values Noted on High Pressure Core Spray Pump AECM-80/99 On April 10, 1980, Mississippi Power & Light Company notified Mr. F. Cantrell of your of fice of a Potentially Reportable Deficiency (PRD) at the Grand Gulf Nuclear Station (GGNS) construction site. The deficiency concerns out of specification bolt torque values noted on the High Pressure Core Spray (HPCS) pump. The pump was manufactured by Byron Jackson Pump Division of Borg Warner Corporation and was procured by General Electric for use at GGNS.

Vendor initiated changes to specified bolt torque values resulted in the issuance of a General Electric Field Disposition Instruction (FDI) to accomplish the required manual and procedure changes. The above referenced vendor changes revised the torquing requirements on all bolts, increasing the specified torque values. Torque value checking indicated that some bolts were torqued to values lower than even the original requirements. In addition there is concern for the adequacy of the torquing requirements presented in the original design.

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UFFICIAL COPY Member Middle South Utilities System B0060503/4

MISSIIIPPI POWER O LI2HT COMPANY Mr. J. P. O'Reilly AECM-80/99 U. S. Nuclear Regulatory Commission Page 2 Our investigation as to the reportability of this issue and its extent is in progress. We are currently evaluating vendor recommendations on the adequacy of the original torquing requirements. We expect to provide our final report and determination on reportability no later than August 4, 1980. This matter is being tracked under PRD-80/17 and Bechtel Management Corrective Action Report (MCAR)-GGNS No. 71.

Yours truly, L. F Nuclear Project Manager JCC/JRD:ls cc:

Mr. N. L. Stampley Mr. R. B. McGehee Mr. T. B. Conner Mr. Victor Stello, Jr., Director Division of Inspection & Enforcement U. S. Nuclear Regulatory Commission Washington, D. C.

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