ML20035F015
| ML20035F015 | |
| Person / Time | |
|---|---|
| Site: | Callaway  |
| Issue date: | 04/14/1993 |
| From: | Schnell D UNION ELECTRIC CO. |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| GL-92-08, GL-92-8, IEIN-92-046, IEIN-92-46, ULNRC-2792, NUDOCS 9304200177 | |
| Download: ML20035F015 (4) | |
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i h$"*[,y NI April 15, 1993
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l U.S. Nuclear Regulatory _ Commission
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l Attn: Document Control Desk Mail Station P1-137 Washington, D.C.
20555 ULNRC-2792 Gentlemen:
j DOCKET NUMBER 50-483'
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CALLAWAY PLANT 1
THERMO-LAG 330-1-FIRE BARRIERS j!
Reference:
NRC Generic Letter 92-08, dated December 17, 1992 l
NRC Generic Letter 92-08, Reporting Requirement 1-requests Licensees to 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.
Callaway Plant uses i
Thermo-Lag 330-1 barriers to meet conditions.of.the-plant's operating license and to satisfy. licensing commitments including 10 CFR 50, Appendix A, General Design Criteria 3 to ensure' safe shutdown capability in the event of a fire and to achieve. physical 1 independence of electrical systems.
Both 1-hour and 3-hour applications of Thermo-Lag materials areLutilized by assembling preformed panels and conduit ~ shapes, as well as trowel-on applications.
Reporting Requirement 2 (a) requests Licensees to state whether or not they have qualified the Thermo-Lag j
330-1 fire' barriers by conducting fire endurance tests in-l accordance with the NRC's requirements and guidance or L
licensing commitments.
All'of the fire: endurance. tests used to qualify the Thermo-Lag 330-1 fire barriers-installed at Callaway Plant were performed by Industrial-Testing Laboratories, Inc.. (ITL).
These1 tests-have been classified.as " indeterminate" by the NRC in Information Notice' (IN) 92-46, "Thermo-Lag Fire Barrier; Material Special Review Team Findings, current Fire Endurance Tests, and Ampacity.Calculati a Errors," dated June 23, 1992..
Reporting. Requirement 2 (b) requests Licensees state (1) whether or not thefbarrier configurations installed in the plant represent the naterials,.
workmanship, methods of assembly, dimensions,Eand configurations of the qualification test-assembly I
i configurations'; and (2) whether or not the-licensee has
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evaluated any deviations from the tested configurations.
As stated in the response to Item 2.a above, the i
qualification fire endurance tests have been classified by the NRC as " indeterminate" in IN 92-46.
Callaway Plant has not evaluated any deviations from the tested configurations.
Reporting Requirement 2 (c) requests Licensees state (1) whether or not the as-built Thermo-Lag 330-1 barrier configurations are consistent with the barrier configurations used during the ampacity derating tests relied upon by the licensee for the ampacity derating factors used for all raceways protected by Thermo-Lag 330-1 (for fire protection of safe shutdown capability or to achieve physical independence of electrical systems) and (2) whether or not the ampacity derating tests results relied upon by the licensees are correct and applicable to the plant design.
The ampacity derating factors used by Callaway Plant were provided by Thermal Sciences, Inc.
NRC IN 92-46 classifies the ampacity derating factors for the Thermo-Lag 330-1 fire barrier system as
" indeterminate".
With respect to any answer to items 2 (a), 2 (b),
or 2 (c) above in the negative, Reporting Requirement 3 requests Licensees (a) describe all corrective actions needed and include a schedule by which such actions shall be completed and (b) describe all compensatory measures taken in accordance with the technical specifications or administrative controls.
Reporting Requirement 3 also requests Licensees confirm in writing when corrective actions have been completed.
Callaway Plant is participating in the NUMARC industry Thermo-Lag program.
This program is intended to provide generic fire endurance i
and ampacity testing and to provide information necessary to accomplish corrective actions.
The Callaway Plant schedule by which such corrective actions will be completed will parallel the specific schedules provided to the NRC by NIEARC.
When corrective actions are completed, Callaway Plant will confirm to the NRC in writing their completion.
All compensatory measures taken in accordance with Callaway Plant administrative controls for inoperable Thermo-Lag fire barriers have been provided to the NRC in ULNRC-2704, dated September 30, 1992 in response to NRC Bulletin 92-01, Supplement 1, dated August 28, 1992.
If you have any questions concerning this matter, please contact me.
Very truly yours, i
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Donald F. Schnell JMC/dls 1
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STATE OF MISSOURI
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l Donald F.
Schnell, of lawful age, being first duly sworn l
upon oath says that he is Senior Vice President-Nuclear and an officer l
of Union Electric Company; that he has read the foregoing document and I
kno"~s the content thereof; that he has executed the same for and on behalf of said company with full power and authority to do so; and that the facts therein stated are true and correct to the best of his l
knowledge, information and belief.
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By Donald F. Schnell Senior Vice President Nuclear i
l SUBSCRIBED and sworn to before me this /
L day l
of d444 (
1993.
F hbt kit.A-,
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l BARBARA J PTAk l
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cc:
T. A.
Baxter, Esq.
l Shaw, Pittman, Potts & Trowbridge 2300 N. Street, N.W.
j Washington, D.C.
20037 Dr. J.
O.
Cermak CFA, Inc.
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18225-A Flower Hill Way Gaithersburg, MD 20679-5334 l
l R. C.
Knop l
Chief, Reactor Project Branch 1
(
l U.S. Nuclear Regulatory Commission Region III 799 Roosevelt Road l
l Glen Ellyn, Illinois 60137 l
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Callaway Resident Office j
(
U.S. Nuclear Regulatory Commission i
RR#1 l
Steedman, Missouri 65077
(
i L. R. Wharton (2)
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Office of Nuclear Reactor Regulation i
U.S. Nuclear Regulatory Commission l
1 White Flint, North, Mail Stop 13E21 11555 Rockville Pike
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Rockville, MD 20852 i
I Manager, Electric Department i
Missouri Public Service Commission l
P.O. Box 360 f
Jefferson City, MO 65102 l
William H. Rasin i
Nuclear Management and Resources Council 1776 Eye Street, N.W.
Suite 300 Washington, D.C.
20006-3706 i
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