ML19305D534

Responds to IE Bulletin 80-03 Re Charcoal Adsorber Cells. Insp of All Util 1 Ventilation Sys Indicate That All Filters Are in Good Condition.Util 2 Uses Deep Bed Type Carbon Filter Beds Rather than Cells

ML19305D534
Person / Time
Site:	Hatch
Issue date:	03/21/1980
From:	Widner W GEORGIA POWER CO.
To:	James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
References
IEB-80-03, IEB-80-3, NUDOCS 8004150198
Download: ML19305D534 (3)

Text

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, , Georgia Power Cornpany n 230 P;;achtree Preet I 6

Post Office Be if45 Atlanta Geor b a'302 Telephone 404 522-6060 March 21, 1980 ;' - - '*

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L Power Generation Departmen, Georgia Power

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U. S. Nuclear Regulatory Commission ' ] f. 7. N Office of Inspection and Enforcement

REFERENCE:

Region II - Suite 3100 RII: JPO 101 Marietta Street, NW M , 5_0- M Atlanta, Georgia 30303 I&E Bulletin 80-03 ATTENTION: Mr. James P. O'Reilly Gentl emen:

The following information is submitted in response to I&E Bulletin 80-03, " Loss of Charcoal From Standard Type II, 2-Inch, Tray Adsorber Cells".

Visual inspection was performed on the carbon filter cells of all ventilating systems, as required by I&E Bulletin 80-03. The reference guide for the inspection was Section 5 of ANSI N530-1975.

Method of Inspection The visual inspections performed involved checking screens for sagging and other obvious defects, housings and frames of cells for damage due to installation, handling or storage, rivet spacing which could result in separation of screen and cell housing, and loss of carbon from cells.

Systems Inspected The following systems were inspected on March 11, 1980:

UNIT 1 L System MPL NO. CELL TYPE NO. OF CELLS Rx Bldg. Vent 1T41-D005 American Air Filter 48 1T41-D006 Carbon adsorber cells tray 48 Type II in IES Std. CS-8T Refueling Floor 1T41-D007 48

[ Vent 1T41-D008 48 Standby Gas 1T46-D001A Farr HPPl Carbon Cells 24 Treatment 1T46-D001B 24 Turbine Bldg. 1U41-D004 American Air Filter 45 Vent 1U41-D005 Carbon adsorber cells tray 45 Type II in IES Std. CS-8T Radwaste Vent. IV41-D005 27 l IV41-D006 27 l Radwaste Add. IV41-D007 27 Vent IV41-D008 27 l

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GeorgiaPower d -

U. S. Nuclear Regulatory Commission Office of Inspection and Enforcement March 21, 1980 Page Two UNIT 1 (Continued)

System MPL NO. CELL TYPE NO OF CELLS Control Room lZ41-D004A Farr H?P1 Carbon Cells 9 Vent lZ41-D004B 9 UNIT 2 System MPL NO. CELL TYPE NO. OF CELLS Rx Bldg. Vent 2T41-D005 Farr Carbon Filter 4 PVC Deep Beds Refueling Floor 2T41-D007 "

9 Vent 2T41-D008 Standby Gas "

2T46-D001A 3 Treatment 2T46-D001B Turbine Bldg. 2U41-D004 "

4 Vent 2U41-D005 Radwaste Vent. "

2V41-D005 11 2V41-D006 NOTE Unit 2 Control Room shares Unit 1 Control Room ventilation system.

In addition to the installed filters above, there are 25 spare cells (American Air Filter cells) and 6 Farr Company HPPl carbon cells stored in the warehouse which were inspected.

Results of Inspection I

Inspections of all ventilation systems on Unit 1 indicate that all filters are in good condition. All screens appear to be very stable with spot weld spacing no greater than two inches apart on any filter. The housings and a frames are solid with no indications of wear or other possible damage. No carbon has been lost from the beds through the screens.

The Unit 2 carbon filter beds are not applicable to this bulletin since they

} are all deep bed type and not cells. The beds were inspected, however, to determine their condition. There were no apparent problems in the Standby

. l GeorgiaPower d U. S. Nuclear Regulatory Commission Office of Inspection and Enforcement March 21, 1980 Page Three Gas Treatment, Reactor Building Ventilation Sys;em, and Radwaste Ventilation System. The Turbine Building Ventilation Systra and Refueling Floor Venti-lation System inspection revealed that a small amount of carbon had sifted through the screens and was lying on the bottom of the filter housing. 285 grams and 212 grams of carbon were found in the A and B housings of the Turbine Building Ventilation System, respectively. 3.66 kilograms and 5.40 kilograms were found in the A and B housing of the Refueling Floor Ventilation Systems, respectively. These values represent only a very small part of the total amount of carbon present in the beds and, a decline in filter efficiency is not expected.

All cells stored at the warehouse are in very good condition with no damage to any part of the cell or screen, and none of these cells are losing charcoal.

The stored replacement cells are manufactured by American Air Filter, and the stored carbon test cells are made by Farr Company.

Corrective Action In order to assure that the carbon efficiencies for the Unit 2 Refueling Floor and Turbine Building Ventilation Systems have not deteriorated because of the small loss of carbon from the beds, these systems will be tested within 30 days.

If you have any questions or comments in this regard, please contact my office.

Very truly yours,

?

W. A. Widner Vice President and General Manager Nuclear Generation

, RDB/mb xc: Director of the Office of Inspection and Enforcement Director of the Division of Operating Reactors, Office of Nuclear Reactor Regulation 4