ML19312D805

Responds to IE Bulletin 80-03, Loss of Charcoal from Std Type II,Two-Inch,Tray Adsorber Cells. Visual Insp of Filter Housing & Adsorber Cells Performed.No Cells Were Found Defective

ML19312D805
Person / Time
Site:	Cooper
Issue date:	03/14/1980
From:	Pilant J NEBRASKA PUBLIC POWER DISTRICT
To:	Seyfrit K NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
References
IEB-80-03, IEB-80-3, NUDOCS 8005050155
Download: ML19312D805 (2)

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s ud STATE March 14, 1980 Mr. Karl V. Seyfrit, Director U.S. Nuclear Regulatory Commission Office of Inspection and Enforcement Region IV 611 Ryan Plaza Drive Suite 1000 Arlington, Texas 76011

Subject:

IE Bulletin No. 80-03 Loss of Charcoal From Standard Type II, 2 Inch, Tray Adsorber Cells

Dear Mr. Seyfrit:

This letter is written in response to the subject bulletin.

Nebraska Public Power District's (NPPD) operating power reactor fa-cility, Cooper Nuclear Station (CNS), uses adsorber cells of the stan-dard Type II in two systems; Standby Gas Treatment (SBGT) and Control Room Emergency Filter ( pass (CREF) . These cells are Barnebey-Cheney, Model FC for SBGT, and American Air Filter, Inc., Model CS-8 for CREF.

CNS is required to test these systems once per operating cycle or af ter 720 hours0.00833 days <br />0.2 hours <br />0.00119 weeks <br />2.7396e-4 months <br /> of operation. The visual inspection took place during the required yearly testing for operability.

NPPD is providing responses to Items 1 thru 4 for power reactor facil-ities with an operating license; the responses are as follows:

1. A visual inspection of the filter housing and adsorber cells as described in Section 5 of ANSI N510-1975 was performed on SBGT and CREF. It was observed that the cells in use were welded in con-

struction, not riveted. Attention was directed toward possible l sagging or separation of screen and cell and any possible defor-mation of screen, housing, and cell. No deformation, leakage,

! separation, or sagging was observed in either system.

2. None of the cells examined were determined to be defective. The SBGT's cella were replaced with cells of the same model and man-ufacturer as a part of normal periodic maintenance. The CREF's cells were not replaced. The operability of both systems was demonstrated by freon leak testing using the preferred method as I described in Regulatory Guide 1.52 and Section 12 of ATSI N510-1975. l l

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Mr. Karl V. Seyfrit March 14, 1980 Page 2.

3. CNS does not use the type of adsorber c'll e in question for tne normal ventilation exhaust filtration system.

4. This letter connnotes NPPD's response to item 1 thru 4 and ful-fills the requirements for a report in item 4.

If you have any questions regarding the enclosed information, please contact me.

Sincerely,

s. .. Pilant Director of Licensing and Quality Assurance JMP:LFD:cg cc: R. E. Buntain i

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