ML19305B928
| ML19305B928 | |
| Person / Time | |
|---|---|
| Site: | Farley  |
| Issue date: | 03/05/1980 |
| From: | Clayton F ALABAMA POWER CO. |
| To: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| References | |
| IEB-80-03, IEB-80-3, NUDOCS 8003240020 | |
| Download: ML19305B928 (3) | |
Text
{{#Wiki_filter:J Alabama Power Company . [{.. 600 North 18th Street Post othca Box 2641 g1 -g6 g Birmingham, Alc.bams 35291 -{
- M?,h??Sii_.
+ $7 ' ' Telephone 205 32>5341 L Mo t^l,',%f,nt Alabama Power c me w n8: 54 March 5, 1980 Mr. James P. O'Reilly, Director .U. S. Nuclear Begulatory O mmission Begion II - 101 Marietta Street, N. W. . J' Suite 3100 Atlanta, Georgia 30303' Docket No. 50-348 50-364
Dear Mr. O'Ibilly:
In response to IE Bulletin 80-03, "Ioss of Charcoal Prta Standard Type II, 2 Inch, Tray Adsorber Cells", dated February 6,1980, Alabama Power Ompany submits the following response for thits 1 and 2 of Farley Nuclear Plant. I'IEM 1: (Facilities with an Operating License). De&amina if charcoal adsorber cells in use, or pwgx,ed for use, . have the potential for a loss of charcoal ircirlarital to handling, storage, or use (as esw1. late). IESPCNSE: A. 'Ibe majority of the filtration systems in INP Unit 1 using charcoal beds are manufactured by CVI Corporation. All the charcoal filters in these units have permanently installed vertical filter beds that are refillable without removing the bed frun the frame. Each filter module is ocmstructed of Type 304 stainless steel. All critical areas where bypass or loss of charcoal could occur are 100% seal welded. 'Ihe screens ocmsist of perforated stainless steel plates and not screen mesh. 'Ihe filter beds.are initially fillsa to a level above the screens to allow a safety margin for any m ttling - that might occur. 'Ihere is no feasible way to have degradation or loss of charcoal as described in the Bulletin on these type filter units. A spot duck of the Ocntrol Ibam Recirc thit confirmed this conclusion in that no loose charcoal was found and no degradation of the beds had occurred. Due to.the design of the units, it is not rhmaa necessary to perform a visual check on the rwnainaar of the' CVI units. 'Ihe following is a list of CVI units in.the plant: J 80'032400 % O
,n.. a- ~, .g\\ s Mr. Jees P. O'Reilly, Director .U. S. Nuclear RegulatLIy O mnission Marcti 5,1980 Page 1. Cbntalment Preacoess Filtration Unit 2. Contalment. Purge'FiltrationUhit 3. Radwaste Area Filtration Unit 4. Post Accirlant Contaiment Venting Filter Unit 5. Waste Gas Decay Shutdown Talk Roczn Filtration thit 6. (2v=4 cal & Laundry Drain Tank IbcIn Filtration Unit 7. Waste Ibnitor Tank Ibm Filtration thit .8. Waste Gas Decay Tank Ibczn (11arcoal Filter thit .9. Waste Gas Ctztpressor Ibczn Charcoal Filter Unit
- 10. (bntrol Ibam Recirculation Filter Unit
- 11. Control Ibam Pressurization Filter thit
- 12. Spent Fuel Filtration Unit
- 13. Waste-Gas Decay Shutdown Tank Ibczn Filtration thit B.
The reiMar of the filtration systes using charcoal beds are manufactured by American Air Filter. Uhese units contain re-novable filters, each consisting of two (2) horizontal trays of activated charcoal retained within a stainless steel frame by perforated netal plates. She American Air Filter cells have spot welds securing the perforated screen to the casing spaced approximately one and one-half (1-1/2) inches apart in ocntrast to the six (6) inch spacing in the.vkrbr cells mentioned in the Bulletin. She following is a list of American Air Filter thits in the plant: 1.- Penetration % Filtration Sistsn (A and B Train) - A visual chet. was pere = a on both trains en 2/15/80 to ascertain that no charcoal had fallen frczn the filters and that the screens were not pnlling out frtun around the frames. ' No degradation of the cells was noted in either unit. In addition a crxtplete visual irsTsevilon as outlined in Section A-5 of. Appendix A and a tracer gas test as outlined in Section 12 of ANSI N510-1975 was satisfactorily ~ empleted cm 9/6/79. 2. Control IbcIn Filteration System - A visual check of this systs cannot be reclily performed in that the unit is u.m W of a round type filter housing, bolted together, and should not be opened for inspection until filter cilange is necessary. On 9/6/79, a tracer gas test was m 9. e we'- e w 4 .-m... m-4
^- .v - ,r Q. Mr. ' James P.- O'Ibilly, Director - i U. S. Nuclear Regulatory Comnission March 5, 1980 ~ Page satisfactorily performed on the filtration system in accordance with Section 12 of ANSI N510-1975. On the basis of the test results and the fact that similar trays are installed and have been inspected on the Penetration Rx2n Filtration System, no visual check should be necessary. l C. All spare AAF charcoal filter cells in the Storemczn wre visually l inspected. 'Ihe rivet ' spacing was approximately one and one-half-(1-1/2) inches as was previously. found in the installed units. No apparent problerts or potential for problerns occurring in the
- future was noted in the inspection.
I'IEM 1: (Facilities with a (bnstruction Permit) Visual inspection shall be conducted only if the charcoal adsorber cells have been purchased and shipnent received. A representative nutter (approximately 5) of each type of call design / manufacturer shall be visually inspected for such deficiencies as rivet spacing and screen / casing separation which could lead to loss of charcoal incidental to handling, stc, rage or use. IESPCNSE: A. 'Ihe majority of the filtration units for ENP Unit 2 using charcoal beds are manufactured by CVI as described in the above response for 011t 1 and, therefore, no inspection was performed. .B. 'Ihe remainder of the filtration systans using charcoal beds are manufactured by American Air Filter. A description of these filters is given above. A physical examination of five filter cells revealed no degradation of the screen to frame bond and no evidence of granular charcoal leakage. Yours very truly, . L. Cla Jr. V FICjr/HRF/mmb cc: Messrs. R. A. '1hamas G. F. Trowbridge Office of I-& E Divn. of asactor Operations Inspection Washington, D. C. Director, Divn. of Fuel Facility & Mahriala -Safety. Inspection Office of Inspection & Enforcement U.S.N.R.C. Washington, D. C. 20555 bO ,-e-, y}}