ML20106B897
| ML20106B897 | |
| Person / Time | |
|---|---|
| Site: | Waterford  |
| Issue date: | 09/29/1992 |
| From: | Burski R ENTERGY OPERATIONS, INC. |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| IEB-92-001, IEB-92-1, W3F192-0330, W3F192-330, NUDOCS 9210050251 | |
| Download: ML20106B897 (2) | |
Text
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i V ENTERGY 7 " """ " '"*'
,a nu; R. F. Burski W3F192-0330 A4.05 QA September 29, 1992 U.S. Nuclear Regulatory Commission ATTN:
Document Control Desk Washington, D.C.
20555
Subject:
Waterford 3 SES Docket No. 50-382 License No. NPF-38 NRC Bulletin No.
92-01, Supplement 1,
" Failure of s
Thermo-Lag 330 Fire Barrier System to Perform Its Specified Fire Endurance Function" Gentlemen:
On August 28, 1992, the NRC issued Supplement 1 to Bulletin No. 92-0 01.
The supplement provided notification of additional apparent failures in fire endurance testing associated with the Thermo-Lag 330 fire barrier system, installed to protect plant safe shutdown capability.
The supplement requested that operating reactor licensees take the recommended actions and provide the NRC with a written response within 30 days of receipt of the bulletin supplement.
Action Request one of the bulletin supplement requested, "For those plants that use either 1-or 3-hour pre-formed Thermo-Lag 330 panels and conduit s' napes, identify the areas of the plant which have Thermo-Lag 330 fire ba uier material installed and determinc.
the plant areas which use this material for the protection and separation of the safe shutdown capability."
Waterford 3 has identified the areas of the plant where Thermo-Lag 330 is installed for protection and separation of safe shutdown equipment, e
Action Request two of the bulletin stated that, "In these plant areas in which Thermo-Lag fire barriera are used in raceways, walls, ceilings, equipment enclosures, or other areas to protect cable trays, -conduits, or separate redundant safe shutdown functions, the licensee should implement,-in accordance with plant procedures, the appropriate compensatory - measures, such as fire watches, consistent with-those that would be implemented by either the plant technical specifications or the operating license for an inoperable f 3re barrier. These compensatory measures should remain in place until the licensee can declare the fire barriers operable on the basis of applicable tests which demonstrate successful 1-or I
3-hour barrier performance."
Waterford 3 has established hourly 0
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Nuclear Regulatory Commission NRC Bulletin No. 92-01, Supplement 1,
" Failure of Ther.ao-Lag 330 Fire Barrier System to Perfcrm Its Specified Fire Endurance Function" W3F192-0330 Page 2 Sept ember 29, 1992 fire watches as compensatory measures in the applicable areas in accordance with plant procedure (UNT-005-013).
Appropriate measures will be continued until operability of the fire appliances can be established.
Currently, plans are to replace Thermo-Lag applications on a free standing wall, a partial enclosure (air handling unit) and an electrical penetration enclosure with alternate material (Design Change Package 3134 and CI/WA-278842/
010971*71).
Disposition of the remaining Thermo-Lag applications (seven fire dampers) it currently being evaluated by our Design Engineering staff.
If you have any questions, please contact O.P.
Pipkins at (504) 739-6707.
Very truly yours,
%f B
k rec Nuclear Safety
[ [ RFB/ OPP /dc cc:
J.L. Milhoan, NRC Region IV D.L. Wigginton, NRC-NRR R.B. McGehes N.S.
Reynolds NRC Resident Inspecto7:s Office
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