ML20003J000

Second Interim Deficiency Rept Re Installation of Ventilation Fire Dampers,Initially Reported on 801103. Deficiency Due to Lack of Sufficient Detail/Design Info. Final Rept by 811201

ML20003J000
Person / Time
Site:	Grand Gulf
Issue date:	04/29/1981
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-81-160, NUDOCS 8105080312
Download: ML20003J000 (4)

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/ MiGSISSIPPI POWER & LIGHT COMPANY

'A b Helping Build Mississippi Esemanand P. O. B O X 184 0, J A C K S O N, MIS SIS SIP PI 3 92 0 5

"$si?4r%"SUc'elr"  !.pril 29, 1981

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4 Office of Inspection & Enforcecent .k \

U. S. Nuclear Regulatory Commission . 61 /[ ls Region II /

101 Marietta Street, N.W.

Suite 3100 9lQ 'l4P 84 4,

'0 IO81h T'2 Atlanta, Georgia 30303 c% ,'ag Attention: Mr. J. P. O'Reilly, Director P 05

SUBJECT:

Grand Gulf Nuclear Station Units 1 and 2 Docket Nos. 50-416/417 File 0260/15525/15526 PRD-80/67, Interim Report #2, Installation of Ventilation Fire Dampers AECM-81/160

Reference:

AECM-80/301 On November 3, 1980, Mississippi Power & Light Company notified Mr. J.

Rausch, of your office, of a Potentially Reportable Deficiency (PRD) at the Grand Gulf Nuclear Station (CGNS) construction site. The deficiency concerns the installation of fire dampers in ventilation systems.

Our investigation into this matter is continuing. Our interim report #2 is attached. We expect to provide our fincl report on this deficiency on or before December 1, 1981.

Yours trul ,

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)l P. Mcdaughy, N.

WHU:mt Attachment l

cc: See page 2 0$

hIlI 6 Member Middle South utilities System 81050809/2, - ._

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Mr. J. P. O'Reilly AECM-81/160 NRC Page 2 cc: Mr. N. L. Stampley '~

Mr. R. B. McGehee Mr. T. B. Conner

.Mr. Jigtor.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 O

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a Attachment to AECM-81/160 Page 1 of 2 INTERIM REPORT NO. 2 FOR PRD-80/67 I. Description of the Deficiency Installation documents for fire dampers in heating-ventilating and air

.. conditioning systems (HVAC) lack sufficient detail / design information and definitive instructions to adequately define size and location of welds or fasteners.

The plant systems affected by this deficiency are: 'the Diesel Generator Building Ventilation System, Control Building Ventilation System, Water Treatment Building Ventilation System, Control Room HVAC System.

Emergency Switchgear & Battery Room Ventilation System, Auxiliary Building Ventilation System, Fuel Handling Area Ventilation System, Turbine Building Ventilation System, and the Radwaste Building Ventilation System.

This deficiency is applicable to Units 1 and 2 and is not reportable under 10CFR Part 21. Two systems have been turned over to and accepted by MP&L, and while this deficiency applies to these systems, the Water Treatment Building Ventilation System is a non-safety related system, and the deficiencies applicable to the Diesel Generator Building Ventilation System were identified and documented prior to acceptance by MP&L, The potential exists that the installed configuration of the fire dampers would not be in accordance with National Fire Protection Association (NFPA) and Underwriter's Laboratory's requirements for a l

l fire rated barrier and would therefore possibly not confine a fire which could affect redundant trains of safety related systems required for safe shutdown. Therefore, this deficiency is reportable under i 10CFR50.55(e) .

II. Approach to Resolution of the Problem This deficiency resulted from a design deficiency. Drawings and Instructions issued for construction lacked sufficient detail / design information and definitive instructions to ensure the integrity of the installation.

Deviations, such as weld installations, which are not per vendor's instructions but are allowed by other vendor's installation instructions l

l for similar equipment, are currently being evaluated by Underwriters Laboratory (UL) per vendor request. Other deviations and associated corrective action shall be fire tested by UL per vendor request.

The fire damper installation design drawing has been revised to conform to NFPA 90A, UL555, and the vendor's installation instructions.

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Attachment to AECM-81/160 Page 2 of 2

. .s Deviations from this design, which are justified by engineering analysis,' require revised vendor's installation instructions or fire testing, which will be included on the installation drawings.

A 100% survey of fire damper installations is currently in progress.

Any deviations from engineering or testing design shall be documented, analyzed, and reworked as necessary.

III. Status of Proposed Resolution The results of the above inspection will be documented. The documentation will be identified with the applicable NCR/DR number.

This documentation will be attached to and maintained for Q fire dampers with NCR 5183 and for non-Q fire dampers with DR No.1481.

IV. Reason Why A Final Report Will Be Delayed , m ,

Our final report will be delayed until all actions above are comp 1cced and Underwriter Laboratory's testing and documentation are analyzed.

V. Date When Final Report Will Be Submitted We expect to submit our final report on this deficiency on or before December 1, 1981.

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