TXX-4257, Interim Significant Deficiency Rept SDAR-132 Re Installation of Curtain Fire Dampers W/O Proper Provisions for Thermal Expansion.Initially Reported on 840330.Review Revealed 50 Dampers Required Rework or Mod.Next Rept by 840817

Interim Significant Deficiency Rept SDAR-132 Re Installation of Curtain Fire Dampers W/O Proper Provisions for Thermal Expansion.Initially Reported on 840330.Review Revealed 50 Dampers Required Rework or Mod.Next Rept by 840817

ML20094Q702
Person / Time
Site:	Comanche Peak
Issue date:	08/13/1984
From:	Fikar L TEXAS UTILITIES ELECTRIC CO. (TU ELECTRIC)
To:	Johnson E NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
References
SDAR-132, TXX-4257, NUDOCS 8408200295
Download: ML20094Q702 (5)

Text

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TEXAS UTILITIES GENERATING COMPANY MKYWAY TOWEN

• 400 NOHTil Ot.IVE MTHEET L.II. MI

• DALLAN, TEXAM 75201 anscut a y cs en esosser August 13, 1984 TXX-4257

+ M @ 3 OW10fE Mr. E.H. Johnson, Chief Reactor Project Branch 1 U l 4E U.S. Nuclear. Regulatory Comission "- y Office of Inspection & Enforcement 611 Ryan Plaza Drive, Suite 1000 Docket Nos.: 50-445 Arlington, TX 76012 50-446 C(NANCHE PEAK STEAM ELECTRIC STATION CtRTAIN FIRE DMPERS QA FILE: CP-84-08, SDAR-132 FILE NO.: 10110

Dear Mr. Johnson,

In accordance with 10CFR50.55(e), we are submitting the enclosed report of actions taken to correct a deficiency with the installation of curtain fire dampers without proper provisions for thermal expansion. We have previously submitted interim reports logged TXX-4140, TXX-4188, TXX-4235 dated March 30, 1984, June 4, 1984, and July 20, 1984, respectively.

Supporting documentation is available at the CPSES site for your Inspectors rev iew.

Very truly yours, (M

L.F. Fikar LFF/mlm Attachment cc: fRC Region IV - (0 + 1 copy)

Director, Inspection & Enforcement (15 copies)

U.S. Nuclear Regulatory Commission Washington, DC 20555 8408200295 840013 PDR ADOCK 05000445 S pop A DEVENION 01' TEXAN UTILITIEN ELEt'TitIE' COMPANY

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% TXX-4257 August 13, 1984 ATTACHMENT Curtain Fire Dampers

Description:

- The condition of selected fire dampers not operating properly during testing resulted in' evaluations performed to determine the cause.and correct the

~ problem. _These evaluations revealed inadequacies with regard to implementing the manufacturers' recommendations with regard to the UL tested configuration and, therefore, the ability of the curtain fire dampers to function in their -

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service condition is indeterminate.

I This. condition of inadequacy resulted from the manufacturers' installation

- criteria not being totally reflected in design documents. This variance precludes consistency between the purchasing specification and design drawings used during installation. .

In order to access _this issue, detailed design criteria were developed which encompassed all manufacturers' recommendations with specific attention to .

assure all field ' conditions were addressed. These design criteria were used to review all damper installations to determine adequacy. In addition, a testing program was undertaken to determine acceptability of specific configurations as installed.

Also, a detailed study of the general fire protection design was initiated to

! evaluate the impact of this concern in regard to the ability to operate safely and bring the plant to shutdown under fire conditions.

1 Safety Implications:

i

_ The conclusions of these studies have revealed conditions do exist, which if i- the concern had remained undetected and the dampers failed to operate, the ability to shutdown the plant safely by operating personnel could be

. jeopardized.

Corrective Action:

i l The following corrective actions are being implemented:

1. Combination of Fire Areas -

Review of the general fire protection ' plan revealed that fire areas could be is combined with no impact on safe shutdown capability, thus deleting the need for a number of fire dampers. The Fire Hazard Analysis (FHA) and drawings

! have been revised to reflect these changes. This reduced the number of i- curtain fire dampers needed to one-hundred-fourteen (114).

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'TXX-4257 August 13, 1984

12. Rework of Fire Dampers:

Ea'ch of the remaining-one-hundred-fourteen (114) curtain fire dampers was reviewed to determine if corrective action was required. This review revealed that fifty (50) fire dampers required rework or modification to a tested configuration. Also, eight (8) HVAC penetrations which contained fire dampers are to be deleted. The attached list provides individual equipnent tag numbers of these drawings.

Due to the present field conditions, sufficient protection exists for the balance of the HVAC penetrations in the fire walls without the use of fire dampers. Conclusive justification is being provided in the form of deviation requests to the NRC staff.

The above stated corrective actions were reviewed with our MIC Staff Fire Protection Reviewer on August 3,1984, and agreed to in principle. Formal submittal of all deviations is scheduled for August 17, 1984.

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TXX-4257' August 13, 1984 ATTACINENT DAMPERS TO BE REW(RKED OR MODIFIED CPX-VADPFD-001- CPX-VACRFD-001 002 002 005 CPX-VAERFD-054 027 CP1-VADPFD-001 030 013 032 018 033 031 036 038 037 040 041 052 ~

043 053 0 90 060 092 061 0 94 070 098 073 099 091 100 093 103 094 104 105 108 CP2-VADPFD-070 109 073 113 095 I

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.116 117 IN ADDITION: 3 sleeves that presently have no dampers that will require a fire damper to be installed.

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.TXX-4257- August. 13, 1984 t- ,

.. . ATTACINENT

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DAMPERS -T0-BE DELETED CPX-VADPFD-009 012 019  !

022 i 039 091 093 CP1-VADPFD-016 4

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