ML20127D525
| ML20127D525 | |
| Person / Time | |
|---|---|
| Site: | Big Rock Point File:Consumers Energy icon.png |
| Issue date: | 01/08/1993 |
| From: | Beckman W CONSUMERS ENERGY CO. (FORMERLY CONSUMERS POWER CO.) |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| GL-92-08, GL-92-8, IEB-92-001, IEB-92-1, NUDOCS 9301150269 | |
| Download: ML20127D525 (2) | |
Text
.
f
[gb C00SumCIS d
h-T p0W6f k
nva steam x%O POWERING MICHIGAN'S PROGRESS
[bg flm k Point Nuclear Pl ant,10209 US 31 Nmth, Chmievolt, fAl 4N20 January 8, 1993 Nuclear Regulatory Commission Document Control Desk Washington, DC 20555 DOCKET 50-155 - LICENSE DPR BIG ROCK POINT PLANT -
RESPONSE TO GENERIC LETTER 92 THERMO-LAG 330-1 FIRE BARRIERS The subject Generic letter dated December 17, 1992, required Licensees to submit a written report within 120 days from the date of the letter addressing the following:
1.
State whether Thermo-Lag 330-1 barriers are relied upon (a) to meet 10 CfR 50.48, to achieve physical independence of electrical systems, (b) to meet a condition of a plant's operating license, or (c) to satisfy a licensing commitment.
If applicable, state that Thermo Lag 330-1 is not used at the facility.
This generic letter applies to all 1-hour and all 3-hour Thermo-Lag 330-1 materials and barrier systems assembled by any assembly method such as by assembling performed panels and conduit shapes, as well as spray, trowel and brush-on applications.
2.
If Thermo-Lag 330-1 barriers are used at the facility:
(a) State whether or not the Licensee has qualified the Thermo-Lag 330-1 fire barriers by conducting fire endurance tests in accordance with the NRC's requirements and guidance or licensing commitments.
(b)
State (1) whether or not the fire barrier configurations installed in the plant represent the materials, workmanship, methods of assembly, dimensions, and configurations of the qualification test assembly configurations; and (2) whether or not the Licensee has evaluated any deviations from the tested configurations, n0 0:
(c) State (1) whether or not the as-built Thermo-Lag 330-1 barrier
$82 configurations are consistent with the barrier configurations used 50 during the ampacity derating tests relied upon by the Licensee for ph the ampacity derating factors used for all raceways protected by Thermo-Lag 3?9-1 (for fire protection of safe shutdown capability or u ingg9 to achieve physical independence of electrical systems) and (2) gg whether or not the ampacity derating test results relied upon by the p
Licensee are correct and applicable to the plant design.
Eg 3.
With respect to any answer to items 2(a), 2(b), or 2(c) above in the 9 0.n.
negative, (a) describe all corrective actions needed and include a k00 A C%ts GVERGY COMR.WY g
~
O e.
NUCLEAR REGULATORY COMMISSION 2
o
. DIG ROCK POINT PLANT RESPONSE TO GENERIC LETTER 92-08 JANUARY 8, 1993 schedule by which such actions shall be completed and (b) describe all compensatory measures taken in accordance with the technical specifications or administrative controls.
When corrective actions have been completed, confirm in writing their completion.
4.
List all Thermo-Lag 330 1 barriers for which answers to-item 2 cannot be provide in the response due within 120 days from the date of this Generic Letter, and include a schedule by which such answers shall be provided.
As described in our response to NRC Bulletin 92-01, dated July 15, 1992, the Bia Rock Point facility does not utilize any Thermo-Lag 330 1 for fire barriers.
NRC letter dated August 10, 1992 provided closure of this issue with respect to Big Rock Point and no further actions are required.
As requested by the Generic Letter, Consumers Power Company estimates that 40 Staff hours were expended preparing this response and associated documentation.
l-w Wi 1 am L Beckman Plant Manager CC:
Administrator, Region 111, USNRC NRC Resident Inspector - Big Rock Point 1
[
L l
...