ML19309H069

Responds to IE Bulletin 80-03 Re Charcoal Loss from Adsorber Cells.Cells Designed W/Internal Stiffeners to Prevent Screen Sagging & Side Compression.Insps Revealed No Deformation

ML19309H069
Person / Time
Site:	Beaver Valley
Issue date:	03/21/1980
From:	Dunn C DUQUESNE LIGHT CO.
To:	Grier B NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
References
IEB-80-03, IEB-80-3, NUDOCS 8005080297
Download: ML19309H069 (2)

Text

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M jg 8005080297

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em 456-8000 435 Sesm Avenue ir agh. Pa.

March 21, 1980 United States Nuclear Regulatory Commission Office of Inspection and Enforcement Attn: Boyce H. Grier, Regional Director Region I 631 Park Avenue King of Prussia, Pennsylvania 19406

Reference:

Beaver Valley Power Station, Unit No. 1 Docket No. 50-334, License No. DPR-66 IE Bulletin 80-03

Dear Mr. Grier:

We have reviewed the referenced bulletin concerning loss of charcoal from Type II, 2 inch tray absorber cells and actions to be taken with the following results.

1.

Beaver Valley Power Station uses Farr Type II, Model NPP-1 carbon absorber cello.

The design of the cells is of the standard type II design.

The screens are tack welded with spacing varying from a minimum of 1/2 inch to a maximum of 1 1/2 inchen.

The absorber cells are designed with internal stiffeners to prevent sagging of the screens and compression of the sides.

2.

The following systems utilize the charcoal absorber cells:

Supplementary Leak Collection system, Control Room Emergency Ventilation system, Containment Hydrogen Purge system, Decontamination Building Hose Exhaust system, Gaseous Waste Process Ventilation system, Containment Iodine Filtration system.

3.

Visual inspection of an absorber cell in accordance with the i

bulletin and ANSI 510 paragraph 5 and Appendix A-5 did not reveal any condition that would lead to loss of charcoal.

In addition, during Technical Specification Surveillance Testing in January 1980, 65 exhausted charcoal absorbers were replaced.

Of the 65 exhausted j

filters and the 65 replacement filters, none showed signs of screen sag, cell deformation, loss of carbon or broken tack welds.

The j

supplementary leak collection, control room emergency ventilation system and containment hydrogen system charcoal absorbers were j

tested in January 1980 with a haloginated hydrocarbon to ensure that leakage around the absorbers was < 1%.

Barvar Volicy Power Station, Unit No. 1 Dockst No. 50-334, Lic nr2 No. DPR-66 IE Bulletin 80-03 Page 2 Since no deformation was seen during the inspections, no additional replacement or testing is required at this time.

If you have any questions concerning this response, please contact my-office.

Very truly yours,

/'e :

f./ l j, 'C s.+~

• * ' ~

C. N. Dunn Vice President, Operations cc: Director Divison of Fuel Facility and Materials Safety Inspection Office of Inspection and Enforcement U.S. Nuclear Regulatory Commission Washington, D.C.

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