ML19322E999

Responds to IE Bulletin 80-03, Loss of Charcoal from Std Type II,2 Inch,Tray Adsorber Cells. Visual Insp of Safety & Nonsafety Filter Plenums Revealed That Spot Welding Used in Cell Const & Screen Sagging or Degradation Not Noted

ML19322E999
Person / Time
Site:	Summer
Issue date:	03/11/1980
From:	Crews E SOUTH CAROLINA ELECTRIC & GAS CO.
To:	James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
References
IEB-80-03, IEB-80-3, NUDOCS 8004040467
Download: ML19322E999 (2)

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SOUTH CAROLINA ELECTRIC aDGAS COMPANY

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March 11,:,1980 g7 Eneestamene a=o Consvaucwon Mr. James P. O'Reilly, Director Office of Inspection & Enforcement U. S. Nuclear Regulatory Commission

,c Region II, Suite 3100 101 Marietta Street, N. W.

Atlanta, Georgia 30303

Subject:

Virgil C. Summer Nuclear Station .

IE Bulletin 80-03 Re: NRC letter dated 2/6/80 Nuclear Engineering File 2.8950

Dear Mr. O'Reilly:

IE Bulletin 80-03 " Loss of Charcoal from Standard Type II, 2 Inch, Tray Adsorber Cells" required visual inspections of charcoal adsorber cells and a report in writing within forty-five (45) days. Visual inspec-tions of the cells were made on all safety and non safety filter plenums.

These include:

(1) XAA-29A-AH Control Room Emergency Filter Plenum "A" (2) XAA-29B-AH Control Room Emergency Filter Plenum "B" (3) XAA-27-AH Controlled Access Charcoal Exhaust Plenum (4) XAA-12-AH Reacto. Bldg. Purge Exhaust Plenum (5) XAA-4A-AH Reactor Bldg. Charcoal Clean-Up System Plenum "A" (6) XAA-4B-AH Reactor Bldg. Charcoal Clean-Up System Plenum "B" (7) XAA-40A-AH Auxiliary Bldg. Charcoal Exhaust Plenum "A" (8) XAA-40B-AH Auxiliary Bldg. Charcoal Exhaust Plenum "B" (9) XAA-21A-AH Fuel Handling Bldg. Charcoal Exhaust Plenum "A" (10) XAA-21B-AH Euel Handling Bldg. Charcoal Exhaust Plenum "B" (11) XAA-21C-AH Fuel Handling Bldg. Charcoal Exhaust Plenum "C"

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All the charcoal filter plenums are of type (HECA) and are supplied by CVI Corporation of Columbus, Ohio. They have been installed in their permanent location, but no charcoal has yet been loaded into the cells.

The inspection procedure consisted of entering each filter plenum and visually inspecting each cell for construction details and observing the screens for any abnorral sagging or buckling. The total area where the screens.were attached to the frame was inspected for attachment method and uniformity. The cover plates on top of the plenums were removed and the interior of each cell was also inspected for screen condition and construction details, f

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N Mr. James P. O'Reilly March 11, 1980 Page Two The inspections revealed that rivets were not used in the construction of the cells. The cells were constructed by spot welding the outer perimeter of the screen to the framework every two (2) inches. The condition of the cells was excellent and no screen sagging or degradation was noted. There were no indications that loss of charcoal could occur during handling, storage, or in service.

If you have any questions or peed additional information, please let us know.

e uly yours, g

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E. H. Crews, Jr.

RBC:EHC:rh cc: Division of Inspection & Enforcement Washington, D. C.

4 H. T. Babb D. R. Moore H. Radin V. C. Summer O. S. Bradham A. A. Smith J. Skolds NPCF/Dixon File k

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