AECM-82-331, Final Deficiency Rept Re Div III Diesel Generator Room Ventilation Sys.Initially Reported on 820504.Individuals Reinstructed on Procedural Requirements for Conduct of Maint Activities Re Preparation of Work Authorization Changes

Final Deficiency Rept Re Div III Diesel Generator Room Ventilation Sys.Initially Reported on 820504.Individuals Reinstructed on Procedural Requirements for Conduct of Maint Activities Re Preparation of Work Authorization Changes

ML20058H680
Person / Time
Site:	Grand Gulf
Issue date:	07/30/1982
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-82-331, NUDOCS 8208090041
Download: ML20058H680 (3)

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MISSISSIPPI POWER & LIGHT COMPANY Helping Build Mississippi P. O. B OX 164 0, J AC K S O N, MIS SIS SIP PI 3 9 2 05 July 30, 1982 JAMES P. McGAUGHY. JR.

AS$l$ TANT VICE PRE 5l DENT Office of Inspection & Enforcement rc U. S. Nuclear Regulatory Commission ~.

Region 11 fJ 101 Marietta Street, N.W. .r.

Suite 3100 Atlanta, Georgia 30303 >

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Attention: Mr. J. P. O'Reilly, Regional Administrator

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SUBJECT:

Grand Gulf Nuclear Station Unit 1 Docket No. 50-416 License No. NPF-13 File 0260/15525/15526 PRD-82/25, Final Report, Division III Diesel Generator Room Ventilation System AECM-82/331

Reference:

AECM-82/251 On May 4, 1982, Mississippi Power & Light Company notified Mr. F. J.

Long, of your office, of a Potentially Reportable Deficiency (PRD) at the Grand Gulf Nuclear Station (GGNS) construction site. The deficiency concerns the loss of the auto start function of the outside air fan in the Divison III l Diesel Generator room.

As stated in AECM-82/251, we have determined that this deficiency, had it remained uncorrected, could have af fected the safety of operations of the nuclear power plant and is reportable under the provisions of 10CFR50.55(e).

It is not reportable under the provisions of 10CFR21.

The report was originally due July 25, 1982, but an extention until July 30, 1982, was granted by Mr. F. Cantrell on July 21, 1982.

Our Final Report is attached.

Yours truly.

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l J. P. McGaughy, Jr.

LCB:dr ATTACHMENT

. OFFICIAL COPY cc: See. page 2  : -- -

8208090041 820730 PDR ADOCK 05000416 imber Middle South Utilities System y- '7-S PDR ,

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Mr. J. P. O' Reilly AECH-82/331-NRC 'Page 2 cc: 'Mr. N. L. Stempley -

Mr. R. B. McGehee Mr. T. B. Conner Mr. Richard C. DeYoung, Director Office of Inspection & Enforcement U. S. Nuclear Regulatory Commission Washington, D.C. 20555

.ir. C. B. Taylor South Miss. Electric Power Association P. O. Box 1589 Hattiesburg, MS 39401 n

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Attachssnt to AECM-82/331 P gs 1 of 1 FINAL REPORT FOR PRD 82/25

1. Description of the Deficiency During work performed under a Maintenance Work Order (MWO) a wire on the temperature switch for an outside air fan in the Division III Diesel Generator Ventilation System was removed. As a result the fan would not automatically start upon a HPCS Diesel Generator start as described in FSAR Section 9.4.5.1.1. The loss of the auto start func-tion increases the potential of the Division III diesel generator failure and the subsequent loss of the HPCS System.

This deficiency is only applicable to Unit 1. It does not apply to either the GE or Bechtel Scope of Supply.

II. Analysis of Safety Implications This deficiency affected the Division III Emergency Diesel Generator Room Ventilation System and prevented automatic actuation of the Room Ventilation System Inlet Fan on low speed upon a Diesel Generator start signal.- The ability to start the fan manually in high speed was not affected. However the control logic was designed to automatically initiate the fan as the diesel started. The deficiency deletes auto-matic actuation capability, leaving only manual initiation control.

This could adversely affect the safe operation of the plant.

III. Corrective Actions Taken The cause of the deficiency was a personnel error. Additional work instructions, which were incomplete, were incorporated into an existing Maintenance Work Order. The authorizations required by existing main-tenance work procedures were not obtained. As a result the required retest requirements were not added.

( Approximately 500 Maintenance Work Orders were reviewed and no other problems were found. Therefore the deficiency affects only the Division III Emergency Diesel Generator.

A separate Maintenance Work Order was issued to properly retest the system. The retest was performed satisfactorily by 5/18/82.

All personnel responsible for this deficiency, and others who have similar responsibilities, including the individuals who reviewed and approved the Maintenance Work Order, have been notified of this prob-lem. These individuals were re-instructed on the procedural require-ments for the conduct of maintenance activities, with emphasis on the preparation and approval of work authorization changes. Furthermore, additional reviews by supervisory level personnel will be made on MWO I changes issued by the group prior to their releane.

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