ML19350C169

Status Rept 2 Re Deficient Mods to Control Room Heating, Ventilation & Airconditioning Fire Dampers Initially Reported 801216.During Seismic Event,Safe Operation Could Be affected.As-built Info Being Evaluated

ML19350C169
Person / Time
Site:	Grand Gulf
Issue date:	03/25/1981
From:	Mcgaughy J MISSISSIPPI POWER & LIGHT CO.
To:	James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
References
AECM-81-117, NUDOCS 8103310411
Download: ML19350C169 (4)

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A j MISSISSIPPI POWER & LIGHT COMPANY Helping Build Mississippi

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P. O. B O X 16 4 0. J A C K S O N, MISSISSIPPI 39205 JAMES P. McGAUGHY. JR. .-  %

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March 25, 1981 ,

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/w .f Office of Inspection & Enforcement j.~/ \f- M J U. S. Nuclear Regulatory Commission C5 -" [

Region II 101 Marietta Street, N.W.

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Atlanta, Georgia 30303 '( r,g' ;' ,

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Attention: Mr. J. P. O'Reilly, Director

SUBJECT:

Grand Gulf Nuclear Station Units 1 and 2 Docket Nos. 50-416/417 File 0260/15525/15526 PRD-80/71, Status Report #2, Control Room HVAC Fire Dampers AECM-81/117 On December 16, 1980, Mississippi Power & Light Company notified Mr. J.

Rausch, of your office, of a Fotentially Reportable Deficiency (PRD) at the Grand Gulf Nuclear Station (GGNS) construction site. The deficiency concerns the modification of the control room HVAC fire dampers.

Investigation as to the reportability of this matter is continuing.

Attached is our Status Report No. 2. We expect to complete our investigation and submit a final report on or before August 30, 1981.

Yours pruly, t

y J. P. McGaughy, Jr.

WHU:mt Attachment cc: See page 2 36/7

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6 8103310 $\\. Member Middle South Utilities System e-

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MISSISSIPPI POWER & LIGHT COMPANY Mr. J. P. O'Reilly AECM-81/ll7 NRC Page 2 cc: Mr. N. L. Stampley Mr. R. B. McGehee Mr. T. B. Conner Mr. Victor Stello, Director Office of Inspection & Enforcement U. S. Nuclear Regulatory Commission Washington, D.C. 20555 Mr. G. B. Taylor ,

South Miss. Electric Power Association P. O. Box 1589 Hattiesburg, MS 39401 i-3 9

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Attachment to AECM-81/117 Page 1 of 2 STATUS REPORT NO. 2 FOR PRD-80/71

1. Description of the Deficiency Type 2 trap door fire dampers were modified in the field by the subcontractor, General Mechanical Contractors (GMC), without vendor, American Warming & Ventilating (AWV), approval. Hinge joints av3 1

latches were relocated 90 degrees from design location affecting the geometry of the installation.

The system affected by this deficiency is the Control Room HVAC System (Z51) and is applicable to Unit 1 and common area. Part 21 not applicable as the system has not been turned over to MP&L.

The possibility exists that during a seismic event the safe operation of the control room HVAC system could be affected if the fire dampers were to fail as a result of the modification.

II. Approach to Resolution of the Problem Our constructor's contract administration personnel provided unauthorized engineering direction to the subcontractor to modify the fire dampers in violation of programmatic requirements. Our constructor has nst completed inspection of all safety-related fire dampers.

Inspections, to date, have identified eight (8) modified fire dampers in both safety-related and non-safety-related systema. There was no modification of Type 2 fire dampers in Unit II; thus, the deficiency is only applicable to Unit I.

All persons in our constructor's Contracts Department .have been

- instructed that any modification to vendor equipment necessitates prior vendor approval.' The instruction.was performed and documented on Janua ry . 9. 1981. -

As-built information has been sent to the vendor and is currently being evaluated for seismic and UL qualification.

The results of the above inspection is being documented. Remedial actions to correct the known nonconformances will be taken after our Architect / Engineer evaluates the inspection documentation.

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Attachme.nt to AECM-81/117 Page 2 of 2 III. Status of Proposed Resolution The impact of this deficiency on safety has not been determined.

Our Architect / Engineer has not received the results of the review requested from the vendor; therefore, thorough evaluation cannot be accomplished at this time. Some dampers will be replaced with new units. The impact on safety, had the dampers remained uncorrected, is being evaluated, but has not yet been determined.

This deficiency was caused by unauthorized engineering instructions for modification of the fire dampers. These changes did not receive vendor (AWV) approval.

The documented training of our constructor's Contract Administration personnel should preclude.the recurrence of this problem.

IV. Reasons Why A Final Report Will Be Delayed Our Architect / Engineer is currently reviewing all aspects of this

deficiency. Evaluation cannot be completed until the vendor's review of this problem is completed.

V. Date When A Final Report Will Be Submitted We expect to submit our final report on this matter on or before August 30, 1981.

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